wayland: wait for pre-apply damage thread before destroying a terminal instance

It's possible, but unlikely, that we've pushed a "pre-apply damage"
job to the renderer thread queue (or that we've pushed it, and the
a thread is now working on it) when we shutdown a terminal instance.

This is sometimes caught in an assertion in term_destroy(), where we
check the queue length is 0. Other times, or in release builds, we
might crash in the thread, or in the shutdown logic when freeing the
buffer chains associated with the terminal instance.

Fix by ensuring there's no pre-apply damage operation queued, or
running, before shutting down a terminal instance.

Closes #2263

.forgejo/issue_template/bug.yml

@@ -29,7 +29,7 @@ body:
   - type: input
     id: compositor
     attributes:
-      label: Compositor Version
+      label: Compositor Name and Version
       description: "The name and version of your compositor"
       placeholder: "sway version 1.9"
     validations:

.woodpecker.yaml

@@ -1,7 +1,7 @@
 # -*- yaml -*-
 
 steps:
-  - name: codespell
+  - name: pychecks
     when:
       - event: [manual, pull_request]
       - event: [push, tag]
@@ -11,10 +11,15 @@ steps:
       - apk add openssl
       - apk add python3
       - apk add py3-pip
-      - python3 -m venv codespell-venv
-      - source codespell-venv/bin/activate
+      - python3 -m venv venv
+      - source venv/bin/activate
+      - python -m pip install --upgrade pip
       - pip install codespell
-      - codespell -Lser,doas,zar README.md INSTALL.md CHANGELOG.md *.c *.h doc/*.scd
+      - pip install mypy
+      - pip install ruff
+      - codespell
+      - mypy
+      - ruff check
       - deactivate
 
   - name: subprojects

CHANGELOG.md

@@ -1,5 +1,12 @@
 # Changelog
 
+* [Unreleased](#unreleased)
+* [1.25.0](#1-25-0)
+* [1.24.0](#1-24-0)
+* [1.23.1](#1-23-1)
+* [1.23.0](#1-23-0)
+* [1.22.3](#1-22-3)
+* [1.22.2](#1-22-2)
 * [1.22.1](#1-22-1)
 * [1.22.0](#1-22-0)
 * [1.21.0](#1-21-0)
@@ -60,6 +67,314 @@
 * [1.2.0](#1-2-0)
 
 
+## Unreleased
+### Added
+
+* `toplevel-tag` option (and `--toplevel-tag` command line options to
+  `foot` and `footclient`), allowing you to set a custom toplevel
+  tag. The compositor must implement the new `xdg-toplevel-tag-v1`
+  Wayland protocol ([#2212][2212]).
+* `[colors-dark]` section to `foot.ini`. Replaces `[colors]`.
+* `[colors-light]` section to `foot.ini`. Replaces `[colors2]`.
+* `XTGETTCAP`: added `query-os-name`, returning the OS foot is
+  compiled for (e.g. _'Linux'_) ([#2209][2209]).
+
+[2212]: https://codeberg.org/dnkl/foot/issues/2212
+[2209]: https://codeberg.org/dnkl/foot/issues/2209
+
+
+### Changed
+
+* When enabling _"focus mode"_ (private mode 1004), foot now sends a
+  focus event immediately, to inform the application what the current
+  state is ([#2202][2202]).
+* Scrollback search is now case sensitive when the search string
+  contains at least one upper case character.
+* Mouse tracking in SGR pixel mode no longer emits negative column/row
+  pixel values ([#2226][2226]).
+* Foot now always uses ARGB SHM surfaces. In earlier versions, XRGB
+  surfaces were used for opaque surfaces. Unfortunately, several
+  compositors had issues when foot switched between ARGB and XRGB
+  surfaces (for example when switching color theme, or toggling
+  fullscreen).
+
+[2202]: https://codeberg.org/dnkl/foot/issues/2202
+[2226]: https://codeberg.org/dnkl/foot/issues/2226
+
+
+### Deprecated
+
+* `[colors]` section in `foot.ini`. Use `[colors-dark]` instead.
+* `[colors2]` section in `foot.ini`. Use `[colors-light]` instead.
+
+
+### Removed
+
+* `cursor.color` config option (deprecated in 1.23.0). Use
+  `colors-{dark,light}.cursor` instead.
+
+
+### Fixed
+
+* Search mode: composing keys not ignored.
+* Crash when triple-clicking a soft-wrapped line and there is a quote
+  character in the last column.
+* Crash when reverse-scrolling (terminfo capability `rin`) such that
+  the current viewport ends up outside the scrollback ([#2232][2232]).
+* Regression: visual glitches in rare circumstances.
+* Key release events for shortcuts being sent to the client
+  application (kitty keyboard protocol only) ([#2257][2257]).
+* Crash when application emits sixel RA with a height of 0, a width >
+  0, and then starts writing sixel data ([#2267][2267]).
+* Crash if shutting down terminal instance while a "pre-apply damage"
+  thread is running ([#2263][2263]).
+
+[2232]: https://codeberg.org/dnkl/foot/issues/2232
+[2257]: https://codeberg.org/dnkl/foot/issues/2257
+[2267]: https://codeberg.org/dnkl/foot/issues/2267
+[2263]: https://codeberg.org/dnkl/foot/issues/2263
+
+
+### Security
+### Contributors
+
+
+## 1.25.0
+
+### Added
+
+* Performance increased and input latency decreased on compositors
+  that do not release SHM buffers immediately ([#2188][2188]).
+* `colors{,2}.dim-blend-towards=black|white` option, allowing you to
+  select towards which color to blend when dimming text. Defaults to
+  `black` in `[colors]`, and `white` in `[colors2]` ([#2187][2187]).
+
+[2188]: https://codeberg.org/dnkl/foot/issues/2188
+[2187]: https://codeberg.org/dnkl/foot/issues/2187
+
+
+### Changed
+
+* SHM buffer sizes are now rounded up to nearest page size, and their
+  stride is always an even multiple of 256 bytes (by default,
+  configurable by setting `tweak.min-stride-alignment`). This allows
+  compositor to directly import foot's SHM buffers to the GPU, with
+  e.g. integrated graphics ([#2182][2182]).
+* Jump label colors in the modus-operandi theme, for improved
+  readability.
+
+[2182]: https://codeberg.org/dnkl/foot/issues/2182
+
+
+### Fixed
+
+* URL labels misplaces when URL contains double-width characters
+  ([#2179][2179]).
+* One space too much consumed when copying (or pipe:ing) contents with
+  tabs ([#2194][2194])
+* Ensure we render a new frame when changing fullscreen state. Before,
+  this was automatically done if the window was also resized. But, it
+  is possible for a compositor to change an application's fullscreen
+  state without resizing the window.
+
+[2179]: https://codeberg.org/dnkl/foot/issues/2179
+[2194]: https://codeberg.org/dnkl/foot/issues/2194
+
+
+### Contributors
+
+* Charalampos Mitrodimas
+* Matthias Heyman
+
+
+## 1.24.0
+
+### Added
+
+* The `uppercase-regex-insert` option controls whether an uppercase hint
+  character will insert the selected text into the prompt in `regex-copy`
+  or `show-urls-copy` mode. It defaults to `true`. ([#2159][2159]).
+
+[2159]: https://codeberg.org/dnkl/foot/issues/2159
+
+### Changed
+
+* The label letters are no longer sorted before being assigned to URLs
+  ([#2140][2140]).
+* Sending SIGUSR1/SIGUSR2 to a `foot --server` process now causes
+  newly spawned client instances to use the selected theme, instead of
+  the original one.
+* SIGUSR1/SIGUSR2 can now be sent to `footclient` processes, to change
+  the theme of that particular instance ([#2156][2156]).
+
+[2156]: https://codeberg.org/dnkl/foot/issues/2156
+
+
+### Fixed
+
+* Invalid configuration values overriding valid ones in surprising
+  ways.
+* Bug where the libutempter utmp backend did not record logouts
+  correctly.
+
+### Contributors
+
+* Ryan Roden-Corrent
+* Tobias Mock
+
+
+## 1.23.1
+
+### Changed
+
+* URL labels are now assigned in reverse order, from bottom to
+  top. This ensures the **last** URL (which is often the one you are
+  interested in) is always assigned the same key ([#2140][2140]).
+* Sending `SIGUSR1` no longer **toggles** between `[colors]` and
+  `[colors2]`, but explicitly changes to `[colors]`. `SIGUSR2` changes
+  to `[colors2]` ([#2144][2144]).
+
+[2140]: https://codeberg.org/dnkl/foot/issues/2140
+[2144]: https://codeberg.org/dnkl/foot/issues/2144
+
+
+### Fixed
+
+* 10-bit surfaces sometimes used instead of 16-bit.
+* OSC-104/110/111/112/117/119 (reset colors) not taking the currently
+  active theme into account.
+
+
+## 1.23.0
+
+### Added
+
+* `colors2` config section. This section duplicates the `colors`
+  section, and lets you define an alternative color theme.
+* `key-bindings.color-theme-switch-1`,
+  `key-bindings.color-theme-switch-2` and
+  `key-bindings.color-theme-toggle` key bindings. These can be used to
+  switch between the primary and alternative color themes. They are
+  not bound by default.
+* Sending `SIGUSR1` to the foot process now triggers a theme switch
+  (in server mode, **all** instances toggles their themes).
+* Support for private mode 2031 - [_Dark and Light Mode
+  Detection_](https://contour-terminal.org/vt-extensions/color-palette-update-notifications/)
+  ([#2025][2025])
+* Added `initial-color-theme=1|2` config option. `1` uses colors from
+  the `[colors]` section, `2` uses `[colors2]`.
+* Combined dark/light theme files for (dark variant is the default,
+  set `initial-color-theme=2` to use the light variant by default):
+  - gruvbox
+  - nvim
+  - paper-color
+  - selenized
+  - solarized
+* `regex-copy`/`show-urls-copy` will copy and paste the selected text if the hint
+  is completed with an uppercase character ([#1975][1975]).
+* `16-bit` to `tweak.surface-bit-depth`. Makes foot use 16-bit image
+  buffers. They provide the necessary color precision required by
+  `gamma-correct-blending=yes`.
+* New cursor shapes, from `cursor-shape-v1` version 2.
+* `center-when-fullscreen` and `center-when-maximized-and-fullscreen`
+  to the `pad` option. This allows you to configure when the grid is
+  centered in more detail ([#2111][2111]).
+
+[2025]: https://codeberg.org/dnkl/foot/issues/2025
+[1975]: https://codeberg.org/dnkl/foot/issues/1975
+[2111]: https://codeberg.org/dnkl/foot/issues/2111
+
+
+### Changed
+
+* `cursor.color` moved to `colors.cursor`.
+* OSC-11 without an alpha value will now restore the configured
+  (i.e. from `foot.ini`) alpha, rather than keeping whatever the
+  current alpha value is, unchanged.
+* `gamma-correct-blending=yes` now defaults to `16-bit` image buffers,
+  instead of `10-bit`.
+* Allow setting either selection background, or selection foreground,
+  only ([#1846][1846]).
+* Drop required version of libxkbcommon from 1.8.0 back to 1.0.0
+  ([#2103][2103]).
+* OSC-52: an empty payload now clears the clipboard.
+* DA (Device Attributes): include `52` in the reply, to indicate
+  OSC-52 support (when at least _copy_ has been enabled in
+  `security.osc52`).
+
+[1846]: https://codeberg.org/dnkl/foot/issues/1846
+[2103]: https://codeberg.org/dnkl/foot/issues/2103
+
+
+### Deprecated
+
+* `cursor.color` config option; use `colors.cursor` instead.
+
+
+### Removed
+
+* Subsurface unmap quirk for Sway. This was a workaround added in
+  1.12.1, for Sway issue [#6960][sway-6960].
+
+
+### Fixed
+
+* `REP`: wrong width of repeated multi-codepoint graphemes.
+* Incorrect surface commit after a configure event, under certain
+  conditions ([#2105][2105]).
+
+[2105]: https://codeberg.org/dnkl/foot/issues/2105
+
+
+### Contributors
+
+* Chen Mulong
+* Kirill Primak
+* Ryan Roden-Corrent
+* tokyo4j
+
+
+## 1.22.3
+
+### Added
+
+* `auto` to the `tweak.surface-bit-depth` option.
+
+
+### Changed
+
+* `gamma-correct-blending` now defaults to `no` instead of `yes`.
+* `tweak.surface-bit-depth` default value changed to `auto`; uses
+  10-bit surfaces when `gamma-correct-blending=yes`, and 8-bit
+  surfaces otherwise.
+
+
+### Fixed
+
+* Inaccurate colors when `gamma-correct-blending=yes` ([#2082][2082]).
+
+[2082]: https://codeberg.org/dnkl/foot/issues/2082
+
+
+## 1.22.2
+
+### Changed
+
+* `gamma-correct-blending=yes` now uses a pure gamma 2.2 transfer
+  function, instead of the piece-wise sRGB transfer function, to match
+  what compositors do.
+
+
+### Fixed
+
+* Wrong colors when `gamma-correct-blending=yes` (the default when
+  there is compositor support). Note that some colors will still be
+  off by a **very** small amount, due to loss of precision when
+  converting to a linear color space. ([#2035][2035]).
+
+[2035]: https://codeberg.org/dnkl/foot/issues/2035
+
+
 ## 1.22.1
 
 ### Fixed

CODE_OF_CONDUCT.md

@@ -53,7 +53,7 @@ decisions when appropriate.
 Participants in the foot community are expected to uphold the described
 standards not only in official community spaces (issue trackers, IRC channels,
 etc.) but in all public spaces. The Code of Conduct however does acknowledge
-that people are fallible and that it is possible to truely correct a past
+that people are fallible and that it is possible to truly correct a past
 pattern of unacceptable behavior. That is to say, the scope of the Code of
 Conduct does not necessarily extend into the distant past.
 

README.md

@@ -641,6 +641,10 @@ All replies are in `tigetstr()` format. That is, given the same
 capability name, foot's reply is identical to what `tigetstr()` would
 have returned.
 
+In addition to queries for terminfo entries, the `query-os-name` query
+will be answered with a response of the form `uname=$(uname -s)`,
+where `$(uname -s)` is the name of the OS foot was compiled for.
+
 
 # Credits
 
@@ -689,8 +693,11 @@ Every now and then I post foot related updates on
 
 # Sponsoring/donations
 
+* Liberapay: https://liberapay.com/dnkl
 * GitHub Sponsors: https://github.com/sponsors/dnkl
 
+[![Donate using Liberapay](https://liberapay.com/assets/widgets/donate.svg)](https://liberapay.com/dnkl/donate)
+
 
 # License
 

box-drawing.c

@@ -2,7 +2,6 @@
 
 #include <stdio.h>
 #include <math.h>
-#include <fenv.h>
 #include <errno.h>
 
 #define LOG_MODULE "box-drawing"

char32.c

@@ -53,6 +53,14 @@ UNITTEST
     xassert(c32cmp(U"b", U"a") > 0);
 }
 
+UNITTEST
+{
+    xassert(c32ncmp(U"foo", U"foot", 3) == 0);
+    xassert(c32ncmp(U"foot", U"FOOT", 4) > 0);
+    xassert(c32ncmp(U"a", U"b", 1) < 0);
+    xassert(c32ncmp(U"bb", U"aa", 2) > 0);
+}
+
 UNITTEST
 {
     char32_t copy[16];
@@ -127,6 +135,20 @@ UNITTEST
     xassert(c32cmp(dst, U"foobar12345678") == 0);
 }
 
+UNITTEST
+{
+    xassert(!isc32upper(U'a'));
+    xassert(isc32upper(U'A'));
+    xassert(!isc32upper(U'a'));
+}
+
+UNITTEST
+{
+    xassert(hasc32upper(U"abc1A"));
+    xassert(!hasc32upper(U"abc1_aaa"));
+    xassert(!hasc32upper(U""));
+}
+
 UNITTEST
 {
     char32_t *c = xc32dup(U"foobar");

char32.h

@@ -20,6 +20,10 @@ static inline int c32cmp(const char32_t *s1, const char32_t *s2) {
     return wcscmp((const wchar_t *)s1, (const wchar_t *)s2);
 }
 
+static inline int c32ncmp(const char32_t *s1, const char32_t *s2, size_t n) {
+    return wcsncmp((const wchar_t *)s1, (const wchar_t *)s2, n);
+}
+
 static inline char32_t *c32ncpy(char32_t *dst, const char32_t *src, size_t n) {
     return (char32_t *)wcsncpy((wchar_t *)dst, (const wchar_t *)src, n);
 }
@@ -60,6 +64,10 @@ static inline char32_t toc32upper(char32_t c) {
     return (char32_t)towupper((wint_t)c);
 }
 
+static inline bool isc32upper(char32_t c32) {
+    return iswupper((wint_t)c32);
+}
+
 static inline bool isc32space(char32_t c32) {
     return iswspace((wint_t)c32);
 }
@@ -72,6 +80,13 @@ static inline bool isc32graph(char32_t c32) {
     return iswgraph((wint_t)c32);
 }
 
+static inline bool hasc32upper(const char32_t *s) {
+    for (int i = 0; s[i] != '\0'; i++) {
+        if (isc32upper(s[i])) return true;
+    }
+    return false;
+}
+
 static inline int c32width(char32_t c) {
 #if defined(FOOT_GRAPHEME_CLUSTERING)
     return utf8proc_charwidth((utf8proc_int32_t)c);

client-protocol.h

@@ -29,3 +29,17 @@ struct client_data {
 } __attribute__((packed));
 
 _Static_assert(sizeof(struct client_data) == 10, "protocol struct size error");
+
+enum client_ipc_code {
+    FOOT_IPC_SIGUSR,
+};
+
+struct client_ipc_hdr {
+    enum client_ipc_code ipc_code;
+    uint8_t size;
+} __attribute__((packed));
+
+
+struct client_ipc_sigusr {
+    int signo;
+} __attribute__((packed));

client.c

@@ -1,12 +1,13 @@
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <stdint.h>
-#include <stdbool.h>
-#include <unistd.h>
-#include <getopt.h>
-#include <signal.h>
 #include <errno.h>
+#include <getopt.h>
+#include <limits.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
 
 #include <sys/socket.h>
 #include <sys/un.h>
@@ -33,13 +34,20 @@ struct string {
 typedef tll(struct string) string_list_t;
 
 static volatile sig_atomic_t aborted = 0;
+static volatile sig_atomic_t sigusr = 0;
 
 static void
-sig_handler(int signo)
+sigint_handler(int signo)
 {
     aborted = 1;
 }
 
+static void
+sigusr_handler(int signo)
+{
+    sigusr = signo;
+}
+
 static ssize_t
 sendall(int sock, const void *_buf, size_t len)
 {
@@ -69,6 +77,7 @@ print_usage(const char *prog_name)
         "  -t,--term=TERM                           value to set the environment variable TERM to (" FOOT_DEFAULT_TERM ")\n"
         "  -T,--title=TITLE                         initial window title (foot)\n"
         "  -a,--app-id=ID                           window application ID (foot)\n"
+        "     --toplevel-tag=TAG                    set a custom toplevel tag\n"
         "  -w,--window-size-pixels=WIDTHxHEIGHT     initial width and height, in pixels\n"
         "  -W,--window-size-chars=WIDTHxHEIGHT      initial width and height, in characters\n"
         "  -m,--maximized                           start in maximized mode\n"
@@ -130,6 +139,10 @@ send_string_list(int fd, const string_list_t *string_list)
     return true;
 }
 
+enum {
+    TOPLEVEL_TAG_OPTION = CHAR_MAX + 1,
+};
+
 int
 main(int argc, char *const *argv)
 {
@@ -144,6 +157,7 @@ main(int argc, char *const *argv)
         {"term",               required_argument, NULL, 't'},
         {"title",              required_argument, NULL, 'T'},
         {"app-id",             required_argument, NULL, 'a'},
+        {"toplevel-tag",       required_argument, NULL, TOPLEVEL_TAG_OPTION},
         {"window-size-pixels", required_argument, NULL, 'w'},
         {"window-size-chars",  required_argument, NULL, 'W'},
         {"maximized",          no_argument,       NULL, 'm'},
@@ -213,6 +227,12 @@ main(int argc, char *const *argv)
                 goto err;
             break;
 
+        case TOPLEVEL_TAG_OPTION:
+            snprintf(buf, sizeof(buf), "toplevel-tag=%s", optarg);
+            if (!push_string(&overrides, buf, &total_len))
+                goto err;
+            break;
+
         case 'L':
             if (!push_string(&overrides, "login-shell=yes", &total_len))
                 goto err;
@@ -507,15 +527,63 @@ main(int argc, char *const *argv)
     if (!send_string_list(fd, &envp))
         goto err;
 
-    struct sigaction sa = {.sa_handler = &sig_handler};
-    sigemptyset(&sa.sa_mask);
-    if (sigaction(SIGINT, &sa, NULL) < 0 || sigaction(SIGTERM, &sa, NULL) < 0) {
+    struct sigaction sa_int = {.sa_handler = &sigint_handler};
+    struct sigaction sa_usr = {.sa_handler = &sigusr_handler};
+    sigemptyset(&sa_int.sa_mask);
+    sigemptyset(&sa_usr.sa_mask);
+
+    if (sigaction(SIGINT, &sa_int, NULL) < 0 ||
+        sigaction(SIGTERM, &sa_int, NULL) < 0 ||
+        sigaction(SIGUSR1, &sa_usr, NULL) < 0 ||
+        sigaction(SIGUSR2, &sa_usr, NULL) < 0)
+    {
         LOG_ERRNO("failed to register signal handlers");
         goto err;
     }
 
     int exit_code;
-    ssize_t rcvd = recv(fd, &exit_code, sizeof(exit_code), 0);
+    ssize_t rcvd = -1;
+
+    while (true) {
+        rcvd = recv(fd, &exit_code, sizeof(exit_code), 0);
+
+        const int got_sigusr = sigusr;
+        sigusr = 0;
+
+        if (rcvd < 0 && errno == EINTR) {
+            if (aborted)
+                break;
+            else if (got_sigusr != 0) {
+                LOG_DBG("sending sigusr %d to server", got_sigusr);
+
+                struct {
+                    struct client_ipc_hdr hdr;
+                    struct client_ipc_sigusr sigusr;
+                } ipc = {
+                    .hdr = {
+                        .ipc_code = FOOT_IPC_SIGUSR,
+                        .size = sizeof(struct client_ipc_sigusr),
+                    },
+                    .sigusr = {
+                        .signo = got_sigusr,
+                    },
+                };
+
+                ssize_t count = send(fd, &ipc, sizeof(ipc), 0);
+                if (count < 0) {
+                    LOG_ERRNO("failed to send SIGUSR IPC to server");
+                    goto err;
+                } else if ((size_t)count != sizeof(ipc)) {
+                    LOG_ERR("failed to send SIGUSR IPC to server");
+                    goto err;
+                }
+            }
+
+            continue;
+        }
+
+        break;
+    }
 
     if (rcvd == -1 && errno == EINTR)
         xassert(aborted);

completions/bash/foot

@@ -6,6 +6,7 @@ _foot()
     local cur prev flags word commands match previous_words i offset
     flags=(
         "--app-id"
+        "--toplevel-tag"
         "--check-config"
         "--config"
         "--font"
@@ -40,7 +41,7 @@ _foot()
     for word in "${previous_words[@]}" ; do
         match=$(printf "$commands" | grep -Fx "$word" 2>/dev/null)
         if [[ ! -z "$match" ]] ; then
-            if [[ ${COMP_WORDS[i-1]} =~ ^(--app-id|--config|--font|--log-level|--pty|--term|--title|--window-size-pixels|--window-size-chars|--working-directory)$ ]] ; then
+            if [[ ${COMP_WORDS[i-1]} =~ ^(--app-id|--toplevel-tag|--config|--font|--log-level|--pty|--term|--title|--window-size-pixels|--window-size-chars|--working-directory)$ ]] ; then
                 (( i++ ))
                 continue
             fi
@@ -75,7 +76,7 @@ _foot()
         COMPREPLY=( $(compgen -W "none error warning info" -- ${cur}) ) ;;
     --log-colorize|-l)
         COMPREPLY=( $(compgen -W "never always auto" -- ${cur}) ) ;;
-    --app-id|--help|--override|--pty|--title|--version|--window-size-chars|--window-size-pixels|--check-config|-[ahoTvWwC])
+    --app-id|--toplevel-tag|--help|--override|--pty|--title|--version|--window-size-chars|--window-size-pixels|--check-config|-[ahoTvWwC])
         # Don't autocomplete for these flags
         : ;;
     *)

completions/bash/footclient

@@ -6,6 +6,7 @@ _footclient()
     local cur prev flags word commands match previous_words i offset
     flags=(
         "--app-id"
+        "--toplevel-tag"
         "--fullscreen"
         "--help"
         "--hold"
@@ -35,7 +36,7 @@ _footclient()
     for word in "${previous_words[@]}" ; do
         match=$(printf "$commands" | grep -Fx "$word" 2>/dev/null)
         if [[ ! -z "$match" ]] ; then
-            if [[ ${COMP_WORDS[i-1]} =~ ^(--app-id|--log-level|--server-socket|--term|--title|--window-size-pixels|--window-size-chars|--working-directory)$ ]] ; then
+            if [[ ${COMP_WORDS[i-1]} =~ ^(--app-id|--toplevel-tag|--log-level|--server-socket|--term|--title|--window-size-pixels|--window-size-chars|--working-directory)$ ]] ; then
                 (( i++ ))
                 continue
             fi
@@ -67,7 +68,7 @@ _footclient()
         COMPREPLY=( $(compgen -W "none error warning info" -- ${cur}) ) ;;
     --log-colorize|-l)
         COMPREPLY=( $(compgen -W "never always auto" -- ${cur}) ) ;;
-    --app-id|--help|--override|--title|--version|--window-size-chars|--window-size-pixels|-[ahoTvWw])
+    --app-id|--toplevel-tag|--help|--override|--title|--version|--window-size-chars|--window-size-pixels|-[ahoTvWw])
         # Don't autocomplete for these flags
         : ;;
     *)

completions/fish/foot.fish

@@ -6,6 +6,7 @@ complete -c foot -x -s f -l font               -a "(fc-list : family | sed 's/,/
 complete -c foot -x -s t -l term               -a '(find /usr/share/terminfo -type f -printf "%f\n")' -d "value to set the environment variable TERM to (foot)"
 complete -c foot -x -s T -l title                                                                     -d "initial window title"
 complete -c foot -x -s a -l app-id                                                                    -d "value to set the app-id property on the Wayland window to (foot)"
+complete -c foot -x      -l toplevel-tag                                                              -d "value to set the toplevel-tag property on the Wayland window to"
 complete -c foot    -s m -l maximized                                                                 -d "start in maximized mode"
 complete -c foot    -s F -l fullscreen                                                                -d "start in fullscreen mode"
 complete -c foot    -s L -l login-shell                                                               -d "start shell as a login shell"

completions/fish/footclient.fish

@@ -2,6 +2,7 @@ complete -c footclient -x                            -a "(__fish_complete_subcom
 complete -c footclient -x -s t -l term               -a '(find /usr/share/terminfo -type f -printf "%f\n")' -d "value to set the environment variable TERM to (foot)"
 complete -c footclient -x -s T -l title                                                                     -d "initial window title"
 complete -c footclient -x -s a -l app-id                                                                    -d "value to set the app-id property on the Wayland window to (foot)"
+complete -c footclient -x      -l toplevel-tag                                                              -d "value to set the toplevel-tag property on the Wayland window to"
 complete -c footclient    -s m -l maximized                                                                 -d "start in maximized mode"
 complete -c footclient    -s F -l fullscreen                                                                -d "start in fullscreen mode"
 complete -c footclient    -s L -l login-shell                                                               -d "start shell as a login shell"

completions/zsh/_foot

@@ -9,6 +9,7 @@ _arguments \
     '(-t --term)'{-t,--term}'[value to set the environment variable TERM to (foot)]:term:->terms' \
     '(-T --title)'{-T,--title}'[initial window title]:()' \
     '(-a --app-id)'{-a,--app-id}'[value to set the app-id property on the Wayland window to (foot)]:()' \
+    '--toplevel-tag=[value to set the toplevel-tag property on the Wayland window to]:()' \
     '(-m --maximized)'{-m,--maximized}'[start in maximized mode]' \
     '(-F --fullscreen)'{-F,--fullscreen}'[start in fullscreen mode]' \
     '(-L --login-shell)'{-L,--login-shell}'[start shell as a login shell]' \

completions/zsh/_footclient

@@ -5,6 +5,7 @@ _arguments \
     '(-t --term)'{-t,--term}'[value to set the environment variable TERM to (foot)]:term:->terms' \
     '(-T --title)'{-T,--title}'[initial window title]:()' \
     '(-a --app-id)'{-a,--app-id}'[value to set the app-id property on the Wayland window to (foot)]:()' \
+    '--toplevel-tag=[value to set the toplevel-tag property on the Wayland window to]:()' \
     '(-m --maximized)'{-m,--maximized}'[start in maximized mode]' \
     '(-F --fullscreen)'{-F,--fullscreen}'[start in fullscreen mode]' \
     '(-L --login-shell)'{-L,--login-shell}'[start shell as a login shell]' \

config.c

@@ -142,6 +142,11 @@ static const char *const binding_action_map[] = {
     [BIND_ACTION_QUIT] = "quit",
     [BIND_ACTION_REGEX_LAUNCH] = "regex-launch",
     [BIND_ACTION_REGEX_COPY] = "regex-copy",
+    [BIND_ACTION_THEME_SWITCH_1] = "color-theme-switch-1",
+    [BIND_ACTION_THEME_SWITCH_2] = "color-theme-switch-2",
+    [BIND_ACTION_THEME_SWITCH_DARK] = "color-theme-switch-dark",
+    [BIND_ACTION_THEME_SWITCH_LIGHT] = "color-theme-switch-light",
+    [BIND_ACTION_THEME_TOGGLE] = "color-theme-toggle",
 
     /* Mouse-specific actions */
     [BIND_ACTION_SCROLLBACK_UP_MOUSE] = "scrollback-up-mouse",
@@ -471,8 +476,12 @@ str_to_ulong(const char *s, int base, unsigned long *res)
     errno = 0;
     char *end = NULL;
 
-    *res = strtoul(s, &end, base);
-    return errno == 0 && *end == '\0';
+    unsigned long v = strtoul(s, &end, base);
+    if (!(errno == 0 && *end == '\0'))
+        return false;
+
+    *res = v;
+    return true;
 }
 
 static bool NOINLINE
@@ -541,12 +550,13 @@ value_to_float(struct context *ctx, float *res)
     errno = 0;
     char *end = NULL;
 
-    *res = strtof(s, &end);
+    float v = strtof(s, &end);
     if (!(errno == 0 && *end == '\0')) {
         LOG_CONTEXTUAL_ERR("invalid decimal value");
         return false;
     }
 
+    *res = v;
     return true;
 }
 
@@ -638,7 +648,6 @@ value_to_enum(struct context *ctx, const char **value_map, int *res)
         valid_values[idx - 2] = '\0';
 
     LOG_CONTEXTUAL_ERR("not one of %s", valid_values);
-    *res = -1;
     return false;
 }
 
@@ -687,14 +696,18 @@ value_to_two_colors(struct context *ctx,
         goto out;
     }
 
+    uint32_t a, b;
+
     ctx->value = first_as_str;
-    if (!value_to_color(ctx, first, allow_alpha))
+    if (!value_to_color(ctx, &a, allow_alpha))
         goto out;
 
     ctx->value = second_as_str;
-    if (!value_to_color(ctx, second, allow_alpha))
+    if (!value_to_color(ctx, &b, allow_alpha))
         goto out;
 
+    *first = a;
+    *second = b;
     ret = true;
 
 out:
@@ -912,6 +925,9 @@ parse_section_main(struct context *ctx)
     else if (streq(key, "app-id"))
         return value_to_str(ctx, &conf->app_id);
 
+    else if (streq(key, "toplevel-tag"))
+        return value_to_str(ctx, &conf->toplevel_tag);
+
     else if (streq(key, "initial-window-size-pixels")) {
         if (!value_to_dimensions(ctx, &conf->size.width, &conf->size.height))
             return false;
@@ -930,21 +946,34 @@ parse_section_main(struct context *ctx)
 
     else if (streq(key, "pad")) {
         unsigned x, y;
-        char mode[16] = {0};
+        char mode[64] = {0};
+        int ret = sscanf(value, "%ux%u %63s", &x, &y, mode);
 
-        int ret = sscanf(value, "%ux%u %15s", &x, &y, mode);
-        bool center = strcasecmp(mode, "center") == 0;
-        bool invalid_mode = !center && mode[0] != '\0';
+        enum center_when center = CENTER_NEVER;
 
-        if ((ret != 2 && ret != 3) || invalid_mode) {
+        if (ret == 3) {
+            if (strcasecmp(mode, "center") == 0)
+                center = CENTER_ALWAYS;
+            else if (strcasecmp(mode, "center-when-fullscreen") == 0)
+                center = CENTER_FULLSCREEN;
+            else if (strcasecmp(mode, "center-when-maximized-and-fullscreen") == 0)
+                center = CENTER_MAXIMIZED_AND_FULLSCREEN;
+            else
+                center = CENTER_INVALID;
+        }
+
+        if ((ret != 2 && ret != 3) || center == CENTER_INVALID) {
             LOG_CONTEXTUAL_ERR(
-                "invalid padding (must be in the form PAD_XxPAD_Y [center])");
+                "invalid padding (must be in the form PAD_XxPAD_Y "
+                "[center|"
+                "center-when-fullscreen|"
+                "center-when-maximized-and-fullscreen])");
             return false;
         }
 
         conf->pad_x = x;
         conf->pad_y = y;
-        conf->center = center;
+        conf->center_when = ret == 2 ? CENTER_NEVER : center;
         return true;
     }
 
@@ -1083,18 +1112,53 @@ parse_section_main(struct context *ctx)
         return true;
     }
 
-    else if (streq(key, "gamma-correct-blending")) {
-        bool gamma_correct;
-        if (!value_to_bool(ctx, &gamma_correct))
+    else if (streq(key, "gamma-correct-blending"))
+        return value_to_bool(ctx, &conf->gamma_correct);
+
+    else if (streq(key, "initial-color-theme")) {
+        _Static_assert(
+            sizeof(conf->initial_color_theme) == sizeof(int),
+            "enum is not 32-bit");
+
+        if (!value_to_enum(ctx, (const char*[]){
+            "dark", "light", "1", "2", NULL},
+                           (int *)&conf->initial_color_theme))
             return false;
 
-        conf->gamma_correct =
-            gamma_correct
-                ? GAMMA_CORRECT_ENABLED
-                : GAMMA_CORRECT_DISABLED;
+        if (streq(ctx->value, "1")) {
+            LOG_WARN("%s:%d: [main].initial-color-theme=1 deprecated, "
+                     "use [main].initial-color-theme=dark instead",
+                     ctx->path, ctx->lineno);
+
+            user_notification_add(
+                &ctx->conf->notifications,
+                USER_NOTIFICATION_DEPRECATED,
+                xstrdup("[main].initial-color-theme=1: "
+                        "use [main].initial-color-theme=dark instead"));
+
+            conf->initial_color_theme = COLOR_THEME_DARK;
+        }
+
+        else if (streq(ctx->value, "2")) {
+            LOG_WARN("%s:%d: [main].initial-color-theme=2 deprecated, "
+                     "use [main].initial-color-theme=light instead",
+                     ctx->path, ctx->lineno);
+
+            user_notification_add(
+                &ctx->conf->notifications,
+                USER_NOTIFICATION_DEPRECATED,
+                xstrdup("[main].initial-color-theme=2: "
+                        "use [main].initial-color-theme=light instead"));
+
+            conf->initial_color_theme = COLOR_THEME_LIGHT;
+        }
+
         return true;
     }
 
+    else if (streq(key, "uppercase-regex-insert"))
+        return value_to_bool(ctx, &conf->uppercase_regex_insert);
+
     else {
         LOG_CONTEXTUAL_ERR("not a valid option: %s", key);
         return false;
@@ -1338,10 +1402,9 @@ parse_section_regex(struct context *ctx)
     }
 }
 
-static bool
-parse_section_colors(struct context *ctx)
+static bool NOINLINE
+parse_color_theme(struct context *ctx, struct color_theme *theme)
 {
-    struct config *conf = ctx->conf;
     const char *key = ctx->key;
 
     size_t key_len = strlen(key);
@@ -1350,28 +1413,26 @@ parse_section_colors(struct context *ctx)
 
     if (isdigit(key[0])) {
         unsigned long index;
-        if (!str_to_ulong(key, 0, &index) ||
-            index >= ALEN(conf->colors.table))
-        {
+        if (!str_to_ulong(key, 0, &index) || index >= ALEN(theme->table)) {
             LOG_CONTEXTUAL_ERR(
                 "invalid color palette index: %s (not in range 0-%zu)",
-                key, ALEN(conf->colors.table));
+                key, ALEN(theme->table));
             return false;
         }
-        color = &conf->colors.table[index];
+        color = &theme->table[index];
     }
 
     else if (key_len == 8 && str_has_prefix(key, "regular") && last_digit < 8)
-        color = &conf->colors.table[last_digit];
+        color = &theme->table[last_digit];
 
     else if (key_len == 7 && str_has_prefix(key, "bright") && last_digit < 8)
-        color = &conf->colors.table[8 + last_digit];
+        color = &theme->table[8 + last_digit];
 
     else if (key_len == 4 && str_has_prefix(key, "dim") && last_digit < 8) {
-        if (!value_to_color(ctx, &conf->colors.dim[last_digit], false))
+        if (!value_to_color(ctx, &theme->dim[last_digit], false))
             return false;
 
-        conf->colors.use_custom.dim |= 1 << last_digit;
+        theme->use_custom.dim |= 1 << last_digit;
         return true;
     }
 
@@ -1380,76 +1441,90 @@ parse_section_colors(struct context *ctx)
               (key_len == 7 && key[5] == '1' && last_digit < 6)))
     {
         size_t idx = key_len == 6 ? last_digit : 10 + last_digit;
-        return value_to_color(ctx, &conf->colors.sixel[idx], false);
+        return value_to_color(ctx, &theme->sixel[idx], false);
     }
 
-    else if (streq(key, "flash")) color = &conf->colors.flash;
-    else if (streq(key, "foreground")) color = &conf->colors.fg;
-    else if (streq(key, "background")) color = &conf->colors.bg;
-    else if (streq(key, "selection-foreground")) color = &conf->colors.selection_fg;
-    else if (streq(key, "selection-background")) color = &conf->colors.selection_bg;
+    else if (streq(key, "flash")) color = &theme->flash;
+    else if (streq(key, "foreground")) color = &theme->fg;
+    else if (streq(key, "background")) color = &theme->bg;
+    else if (streq(key, "selection-foreground")) color = &theme->selection_fg;
+    else if (streq(key, "selection-background")) color = &theme->selection_bg;
 
     else if (streq(key, "jump-labels")) {
         if (!value_to_two_colors(
                 ctx,
-                &conf->colors.jump_label.fg,
-                &conf->colors.jump_label.bg,
+                &theme->jump_label.fg,
+                &theme->jump_label.bg,
                 false))
         {
             return false;
         }
 
-        conf->colors.use_custom.jump_label = true;
+        theme->use_custom.jump_label = true;
         return true;
     }
 
     else if (streq(key, "scrollback-indicator")) {
         if (!value_to_two_colors(
                 ctx,
-                &conf->colors.scrollback_indicator.fg,
-                &conf->colors.scrollback_indicator.bg,
+                &theme->scrollback_indicator.fg,
+                &theme->scrollback_indicator.bg,
                 false))
         {
             return false;
         }
 
-        conf->colors.use_custom.scrollback_indicator = true;
+        theme->use_custom.scrollback_indicator = true;
         return true;
     }
 
     else if (streq(key, "search-box-no-match")) {
         if (!value_to_two_colors(
                 ctx,
-                &conf->colors.search_box.no_match.fg,
-                &conf->colors.search_box.no_match.bg,
+                &theme->search_box.no_match.fg,
+                &theme->search_box.no_match.bg,
                 false))
         {
             return false;
         }
 
-        conf->colors.use_custom.search_box_no_match = true;
+        theme->use_custom.search_box_no_match = true;
         return true;
     }
 
     else if (streq(key, "search-box-match")) {
         if (!value_to_two_colors(
                 ctx,
-                &conf->colors.search_box.match.fg,
-                &conf->colors.search_box.match.bg,
+                &theme->search_box.match.fg,
+                &theme->search_box.match.bg,
                 false))
         {
             return false;
         }
 
-        conf->colors.use_custom.search_box_match = true;
+        theme->use_custom.search_box_match = true;
+        return true;
+    }
+
+    else if (streq(key, "cursor")) {
+        if (!value_to_two_colors(
+                ctx,
+                &theme->cursor.text,
+                &theme->cursor.cursor,
+                false))
+        {
+            return false;
+        }
+
+        theme->use_custom.cursor = true;
         return true;
     }
 
     else if (streq(key, "urls")) {
-        if (!value_to_color(ctx, &conf->colors.url, false))
+        if (!value_to_color(ctx, &theme->url, false))
             return false;
 
-        conf->colors.use_custom.url = true;
+        theme->use_custom.url = true;
         return true;
     }
 
@@ -1463,7 +1538,7 @@ parse_section_colors(struct context *ctx)
             return false;
         }
 
-        conf->colors.alpha = alpha * 65535.;
+        theme->alpha = alpha * 65535.;
         return true;
     }
 
@@ -1477,18 +1552,28 @@ parse_section_colors(struct context *ctx)
             return false;
         }
 
-        conf->colors.flash_alpha = alpha * 65535.;
+        theme->flash_alpha = alpha * 65535.;
         return true;
     }
 
-    else if (strcmp(key, "alpha-mode") == 0) {
-        _Static_assert(sizeof(conf->colors.alpha_mode) == sizeof(int),
+    else if (streq(key, "alpha-mode")) {
+        _Static_assert(sizeof(theme->alpha_mode) == sizeof(int),
         "enum is not 32-bit");
 
         return value_to_enum(
             ctx,
             (const char *[]){"default", "matching", "all", NULL},
-            (int *)&conf->colors.alpha_mode);
+            (int *)&theme->alpha_mode);
+    }
+
+    else if (streq(key, "dim-blend-towards")) {
+        _Static_assert(sizeof(theme->dim_blend_towards) == sizeof(int),
+                       "enum is not 32-bit");
+
+        return value_to_enum(
+            ctx,
+            (const char *[]){"black", "white", NULL},
+            (int *)&theme->dim_blend_towards);
     }
 
     else {
@@ -1504,6 +1589,46 @@ parse_section_colors(struct context *ctx)
     return true;
 }
 
+static bool
+parse_section_colors_dark(struct context *ctx)
+{
+    return parse_color_theme(ctx, &ctx->conf->colors_dark);
+}
+
+static bool
+parse_section_colors_light(struct context *ctx)
+{
+    return parse_color_theme(ctx, &ctx->conf->colors_light);
+}
+
+static bool
+parse_section_colors(struct context *ctx)
+{
+    LOG_WARN("%s:%d: [colors]: deprecated; use [colors-dark] instead",
+             ctx->path, ctx->lineno);
+
+    user_notification_add(
+        &ctx->conf->notifications,
+        USER_NOTIFICATION_DEPRECATED,
+        xstrdup("[colors]: use [colors-dark] instead"));
+
+    return parse_color_theme(ctx, &ctx->conf->colors_dark);
+}
+
+static bool
+parse_section_colors2(struct context *ctx)
+{
+    LOG_WARN("%s:%d: [colors2]: deprecated; use [colors-light] instead",
+             ctx->path, ctx->lineno);
+
+    user_notification_add(
+        &ctx->conf->notifications,
+        USER_NOTIFICATION_DEPRECATED,
+        xstrdup("[colors2]: use [colors-light] instead"));
+
+    return parse_color_theme(ctx, &ctx->conf->colors_light);
+}
+
 static bool
 parse_section_cursor(struct context *ctx)
 {
@@ -1536,21 +1661,6 @@ parse_section_cursor(struct context *ctx)
     else if (streq(key, "blink-rate"))
         return value_to_uint32(ctx, 10, &conf->cursor.blink.rate_ms);
 
-    else if (streq(key, "color")) {
-        if (!value_to_two_colors(
-                ctx,
-                &conf->cursor.color.text,
-                &conf->cursor.color.cursor,
-                false))
-        {
-            return false;
-        }
-
-        conf->cursor.color.text |= 1u << 31;
-        conf->cursor.color.cursor |= 1u << 31;
-        return true;
-    }
-
     else if (streq(key, "beam-thickness"))
         return value_to_pt_or_px(ctx, &conf->cursor.beam_thickness);
 
@@ -2198,6 +2308,29 @@ parse_key_binding_section(struct context *ctx,
             aux.regex_name = regex_name;
         }
 
+        if (action_map == binding_action_map &&
+            action >= BIND_ACTION_THEME_SWITCH_1 &&
+            action <= BIND_ACTION_THEME_SWITCH_2)
+        {
+            const char *use_instead =
+                action_map[action == BIND_ACTION_THEME_SWITCH_1
+                    ? BIND_ACTION_THEME_SWITCH_DARK
+                    : BIND_ACTION_THEME_SWITCH_LIGHT];
+
+            const char *notif = action == BIND_ACTION_THEME_SWITCH_1
+                ? "[key-bindings].color-theme-switch-1: use [key-bindings].color-theme-switch-dark instead"
+                : "[key-bindings].color-theme-switch-2: use [key-bindings].color-theme-switch-light instead";
+
+            LOG_WARN("%s:%d: [key-bindings].%s: deprecated, use %s instead",
+                     ctx->path, ctx->lineno,
+                     action_map[action], use_instead);
+
+            user_notification_add(
+                &ctx->conf->notifications,
+                USER_NOTIFICATION_DEPRECATED,
+                xstrdup(notif));
+        }
+
         if (!value_to_key_combos(ctx, action, &aux, bindings, KEY_BINDING)) {
             free_binding_aux(&aux);
             return false;
@@ -2776,14 +2909,27 @@ parse_section_tweak(struct context *ctx)
 
     else if (streq(key, "surface-bit-depth")) {
         _Static_assert(sizeof(conf->tweak.surface_bit_depth) == sizeof(int),
-            "enum is not 32-bit");
+                       "enum is not 32-bit");
 
+#if defined(HAVE_PIXMAN_RGBA_16)
         return value_to_enum(
                 ctx,
-                (const char *[]){"8-bit", "10-bit", NULL},
+                (const char *[]){"auto", "8-bit", "10-bit", "16-bit", NULL},
                 (int *)&conf->tweak.surface_bit_depth);
+#else
+        return value_to_enum(
+                ctx,
+                (const char *[]){"auto", "8-bit", "10-bit", NULL},
+                (int *)&conf->tweak.surface_bit_depth);
+#endif
     }
 
+    else if (streq(key, "min-stride-alignment"))
+        return value_to_uint32(ctx, 10, &conf->tweak.min_stride_alignment);
+
+    else if (streq(key, "pre-apply-damage"))
+        return value_to_bool(ctx, &conf->tweak.preapply_damage);
+
     else {
         LOG_CONTEXTUAL_ERR("not a valid option: %s", key);
         return false;
@@ -2875,7 +3021,8 @@ enum section {
     SECTION_SCROLLBACK,
     SECTION_URL,
     SECTION_REGEX,
-    SECTION_COLORS,
+    SECTION_COLORS_DARK,
+    SECTION_COLORS_LIGHT,
     SECTION_CURSOR,
     SECTION_MOUSE,
     SECTION_CSD,
@@ -2887,6 +3034,11 @@ enum section {
     SECTION_ENVIRONMENT,
     SECTION_TWEAK,
     SECTION_TOUCH,
+
+    /* Deprecated */
+    SECTION_COLORS,
+    SECTION_COLORS2,
+
     SECTION_COUNT,
 };
 
@@ -2905,7 +3057,8 @@ static const struct {
     [SECTION_SCROLLBACK] =      {&parse_section_scrollback, "scrollback"},
     [SECTION_URL] =             {&parse_section_url, "url"},
     [SECTION_REGEX] =           {&parse_section_regex, "regex", true},
-    [SECTION_COLORS] =          {&parse_section_colors, "colors"},
+    [SECTION_COLORS_DARK] =     {&parse_section_colors_dark, "colors-dark"},
+    [SECTION_COLORS_LIGHT] =    {&parse_section_colors_light, "colors-light"},
     [SECTION_CURSOR] =          {&parse_section_cursor, "cursor"},
     [SECTION_MOUSE] =           {&parse_section_mouse, "mouse"},
     [SECTION_CSD] =             {&parse_section_csd, "csd"},
@@ -2917,6 +3070,10 @@ static const struct {
     [SECTION_ENVIRONMENT] =     {&parse_section_environment, "environment"},
     [SECTION_TWEAK] =           {&parse_section_tweak, "tweak"},
     [SECTION_TOUCH] =           {&parse_section_touch, "touch"},
+
+    /* Deprecated */
+    [SECTION_COLORS] =          {&parse_section_colors, "colors"},
+    [SECTION_COLORS2] =         {&parse_section_colors2, "colors2"},
 };
 
 static_assert(ALEN(section_info) == SECTION_COUNT, "section info array size mismatch");
@@ -3289,6 +3446,7 @@ config_load(struct config *conf, const char *conf_path,
         .shell = get_shell(),
         .title = xstrdup("foot"),
         .app_id = (as_server ? xstrdup("footclient") : xstrdup("foot")),
+        .toplevel_tag = xstrdup(""),
         .word_delimiters = xc32dup(U",│`|:\"'()[]{}<>"),
         .size = {
             .type = CONF_SIZE_PX,
@@ -3297,6 +3455,7 @@ config_load(struct config *conf, const char *conf_path,
         },
         .pad_x = 0,
         .pad_y = 0,
+        .center_when = CENTER_MAXIMIZED_AND_FULLSCREEN,
         .resize_by_cells = true,
         .resize_keep_grid = true,
         .resize_delay_ms = 100,
@@ -3318,7 +3477,8 @@ config_load(struct config *conf, const char *conf_path,
         .underline_thickness = {.pt = 0., .px = -1},
         .strikeout_thickness = {.pt = 0., .px = -1},
         .dpi_aware = false,
-        .gamma_correct = GAMMA_CORRECT_AUTO,
+        .gamma_correct = false,
+        .uppercase_regex_insert = true,
         .security = {
             .osc52 = OSC52_ENABLED,
         },
@@ -3347,23 +3507,27 @@ config_load(struct config *conf, const char *conf_path,
             },
             .multiplier = 3.,
         },
-        .colors = {
+        .colors_dark = {
             .fg = default_foreground,
             .bg = default_background,
             .flash = 0x7f7f00,
             .flash_alpha = 0x7fff,
             .alpha = 0xffff,
             .alpha_mode = ALPHA_MODE_DEFAULT,
+            .dim_blend_towards = DIM_BLEND_TOWARDS_BLACK,
             .selection_fg = 0x80000000,  /* Use default bg */
             .selection_bg = 0x80000000,  /* Use default fg */
+            .cursor = {
+                .text = 0,
+                .cursor = 0,
+            },
             .use_custom = {
-                .selection = false,
                 .jump_label = false,
                 .scrollback_indicator = false,
                 .url = false,
             },
         },
-
+        .initial_color_theme = COLOR_THEME_DARK,
         .cursor = {
             .style = CURSOR_BLOCK,
             .unfocused_style = CURSOR_UNFOCUSED_HOLLOW,
@@ -3371,10 +3535,6 @@ config_load(struct config *conf, const char *conf_path,
                 .enabled = false,
                 .rate_ms = 500,
             },
-            .color = {
-                .text = 0,
-                .cursor = 0,
-            },
             .beam_thickness = {.pt = 1.5},
             .underline_thickness = {.pt = 0., .px = -1},
         },
@@ -3428,7 +3588,9 @@ config_load(struct config *conf, const char *conf_path,
             .box_drawing_solid_shades = true,
             .font_monospace_warn = true,
             .sixel = true,
-            .surface_bit_depth = 8,
+            .surface_bit_depth = SHM_BITS_AUTO,
+            .min_stride_alignment = 256,
+            .preapply_damage = true,
         },
 
         .touch = {
@@ -3445,8 +3607,11 @@ config_load(struct config *conf, const char *conf_path,
         .notifications = tll_init(),
     };
 
-    memcpy(conf->colors.table, default_color_table, sizeof(default_color_table));
-    memcpy(conf->colors.sixel, default_sixel_colors, sizeof(default_sixel_colors));
+    memcpy(conf->colors_dark.table, default_color_table, sizeof(default_color_table));
+    memcpy(conf->colors_dark.sixel, default_sixel_colors, sizeof(default_sixel_colors));
+    memcpy(&conf->colors_light, &conf->colors_dark, sizeof(conf->colors_dark));
+    conf->colors_light.dim_blend_towards = DIM_BLEND_TOWARDS_WHITE;
+
     parse_modifiers(XKB_MOD_NAME_SHIFT, 5, &conf->mouse.selection_override_modifiers);
 
     tokenize_cmdline(
@@ -3550,10 +3715,6 @@ config_load(struct config *conf, const char *conf_path,
     if (!config_override_apply(conf, overrides, errors_are_fatal))
         ret = !errors_are_fatal;
 
-    conf->colors.use_custom.selection =
-        conf->colors.selection_fg >> 24 == 0 &&
-        conf->colors.selection_bg >> 24 == 0;
-
     if (ret && conf->fonts[0].count == 0) {
         struct config_font font;
         if (!config_font_parse("monospace", &font)) {
@@ -3738,6 +3899,7 @@ config_clone(const struct config *old)
     conf->shell = xstrdup(old->shell);
     conf->title = xstrdup(old->title);
     conf->app_id = xstrdup(old->app_id);
+    conf->toplevel_tag = xstrdup(old->toplevel_tag);
     conf->word_delimiters = xc32dup(old->word_delimiters);
     conf->scrollback.indicator.text = xc32dup(old->scrollback.indicator.text);
     conf->server_socket_path = xstrdup(old->server_socket_path);
@@ -3837,6 +3999,7 @@ config_free(struct config *conf)
     free(conf->shell);
     free(conf->title);
     free(conf->app_id);
+    free(conf->toplevel_tag);
     free(conf->word_delimiters);
     spawn_template_free(&conf->bell.command);
     free(conf->scrollback.indicator.text);
@@ -3904,9 +4067,10 @@ config_font_parse(const char *pattern, struct config_font *font)
          * both "size" and "pixelsize" being set, and we don't know
          * which one takes priority.
          */
+        FcConfig *fc_conf = FcConfigCreate();
         FcPattern *pat_copy = FcPatternDuplicate(pat);
         if (pat_copy == NULL ||
-            !FcConfigSubstitute(NULL, pat_copy, FcMatchPattern))
+            !FcConfigSubstitute(fc_conf, pat_copy, FcMatchPattern))
         {
             LOG_WARN("%s: failed to do config substitution", pattern);
         } else {
@@ -3915,6 +4079,7 @@ config_font_parse(const char *pattern, struct config_font *font)
         }
 
         FcPatternDestroy(pat_copy);
+        FcConfigDestroy(fc_conf);
 
         if (have_pt_size != FcResultMatch && have_px_size != FcResultMatch)
             pt_size = 8.0;

config.h

@@ -131,11 +131,97 @@ struct custom_regex {
     struct config_spawn_template launch;
 };
 
+struct color_theme {
+    uint32_t fg;
+    uint32_t bg;
+    uint32_t flash;
+    uint32_t flash_alpha;
+    uint32_t table[256];
+    uint16_t alpha;
+    uint32_t selection_fg;
+    uint32_t selection_bg;
+    uint32_t url;
+
+    uint32_t dim[8];
+    uint32_t sixel[16];
+
+    enum {
+        DIM_BLEND_TOWARDS_BLACK,
+        DIM_BLEND_TOWARDS_WHITE,
+    } dim_blend_towards;
+
+    enum {
+        ALPHA_MODE_DEFAULT,
+        ALPHA_MODE_MATCHING,
+        ALPHA_MODE_ALL
+    } alpha_mode;
+
+    struct {
+        uint32_t text;
+        uint32_t cursor;
+    } cursor;
+
+    struct {
+        uint32_t fg;
+        uint32_t bg;
+    } jump_label;
+
+    struct {
+        uint32_t fg;
+        uint32_t bg;
+    } scrollback_indicator;
+
+    struct {
+        struct {
+            uint32_t fg;
+            uint32_t bg;
+        } no_match;
+
+        struct {
+            uint32_t fg;
+            uint32_t bg;
+        } match;
+    } search_box;
+
+    struct {
+        bool cursor:1;
+        bool jump_label:1;
+        bool scrollback_indicator:1;
+        bool url:1;
+        bool search_box_no_match:1;
+        bool search_box_match:1;
+        uint8_t dim;
+    } use_custom;
+};
+
+enum which_color_theme {
+    COLOR_THEME_DARK,
+    COLOR_THEME_LIGHT,
+    COLOR_THEME_1,  /* Deprecated */
+    COLOR_THEME_2, /* Deprecated */
+};
+
+enum shm_bit_depth {
+    SHM_BITS_AUTO,
+    SHM_BITS_8,
+    SHM_BITS_10,
+    SHM_BITS_16,
+};
+
+enum center_when {
+    CENTER_INVALID,
+    CENTER_NEVER,
+    CENTER_FULLSCREEN,
+    CENTER_MAXIMIZED_AND_FULLSCREEN,
+    CENTER_ALWAYS,
+};
+
 struct config {
     char *term;
     char *shell;
     char *title;
     char *app_id;
+    char *toplevel_tag;
     char32_t *word_delimiters;
     bool login_shell;
     bool locked_title;
@@ -148,7 +234,7 @@ struct config {
 
     unsigned pad_x;
     unsigned pad_y;
-    bool center;
+    enum center_when center_when;
 
     bool resize_by_cells;
     bool resize_keep_grid;
@@ -168,9 +254,8 @@ struct config {
     enum { STARTUP_WINDOWED, STARTUP_MAXIMIZED, STARTUP_FULLSCREEN } startup_mode;
 
     bool dpi_aware;
-    enum {GAMMA_CORRECT_DISABLED,
-          GAMMA_CORRECT_ENABLED,
-          GAMMA_CORRECT_AUTO} gamma_correct;
+    bool gamma_correct;
+    bool uppercase_regex_insert;
     struct config_font_list fonts[4];
     struct font_size_adjustment font_size_adjustment;
 
@@ -244,58 +329,9 @@ struct config {
 
     tll(struct custom_regex) custom_regexes;
 
-    struct {
-        uint32_t fg;
-        uint32_t bg;
-        uint32_t flash;
-        uint32_t flash_alpha;
-        uint32_t table[256];
-        uint16_t alpha;
-        uint32_t selection_fg;
-        uint32_t selection_bg;
-        uint32_t url;
-
-        uint32_t dim[8];
-        uint32_t sixel[16];
-
-        enum {
-            ALPHA_MODE_DEFAULT,
-            ALPHA_MODE_MATCHING,
-            ALPHA_MODE_ALL
-        } alpha_mode;
-
-        struct {
-            uint32_t fg;
-            uint32_t bg;
-        } jump_label;
-
-        struct {
-            uint32_t fg;
-            uint32_t bg;
-        } scrollback_indicator;
-
-        struct {
-            struct {
-                uint32_t fg;
-                uint32_t bg;
-            } no_match;
-
-            struct {
-                uint32_t fg;
-                uint32_t bg;
-            } match;
-        } search_box;
-
-        struct {
-            bool selection:1;
-            bool jump_label:1;
-            bool scrollback_indicator:1;
-            bool url:1;
-            bool search_box_no_match:1;
-            bool search_box_match:1;
-            uint8_t dim;
-        } use_custom;
-    } colors;
+    struct color_theme colors_dark;
+    struct color_theme colors_light;
+    enum which_color_theme initial_color_theme;
 
     struct {
         enum cursor_style style;
@@ -304,10 +340,6 @@ struct config {
             bool enabled;
             uint32_t rate_ms;
         } blink;
-        struct {
-            uint32_t text;
-            uint32_t cursor;
-        } color;
         struct pt_or_px beam_thickness;
         struct pt_or_px underline_thickness;
     } cursor;
@@ -410,7 +442,9 @@ struct config {
         bool box_drawing_solid_shades;
         bool font_monospace_warn;
         bool sixel;
-        enum { SHM_8_BIT, SHM_10_BIT } surface_bit_depth;
+        enum shm_bit_depth surface_bit_depth;
+        uint32_t min_stride_alignment;
+        bool preapply_damage;
     } tweak;
 
     struct {

csi.c

@@ -117,9 +117,9 @@ csi_sgr(struct terminal *term)
                         style > UNDERLINE_SINGLE;
                     break;
                 }
-
-                term_update_ascii_printer(term);
-            }
+            } else
+                term->bits_affecting_ascii_printer.underline_style = false;
+            term_update_ascii_printer(term);
             break;
         }
         case 5: term->vt.attrs.blink = true; break;
@@ -422,6 +422,8 @@ decset_decrst(struct terminal *term, unsigned param, bool enable)
 
     case 1004:
         term->focus_events = enable;
+        if (enable)
+            term_to_slave(term, term->kbd_focus ? "\033[I" : "\033[O", 3);
         break;
 
     case 1005:
@@ -563,6 +565,10 @@ decset_decrst(struct terminal *term, unsigned param, bool enable)
 #endif
         break;
 
+    case 2031:
+        term->report_theme_changes = enable;
+        break;
+
     case 2048:
         if (enable)
             term_enable_size_notifications(term);
@@ -657,6 +663,7 @@ decrqm(const struct terminal *term, unsigned param)
     case 2027: return term->conf->tweak.grapheme_width_method != GRAPHEME_WIDTH_DOUBLE
         ? DECRPM_PERMANENTLY_RESET
         : decrpm(term->grapheme_shaping);
+    case 2031: return decrpm(term->report_theme_changes);
     case 2048: return decrpm(term->size_notifications);
     case 8452: return decrpm(term->sixel.cursor_right_of_graphics);
     case 737769: return decrpm(term_ime_is_enabled(term));
@@ -702,6 +709,7 @@ xtsave(struct terminal *term, unsigned param)
     case 2004: term->xtsave.bracketed_paste = term->bracketed_paste; break;
     case 2026: term->xtsave.app_sync_updates = term->render.app_sync_updates.enabled; break;
     case 2027: term->xtsave.grapheme_shaping = term->grapheme_shaping; break;
+    case 2031: term->xtsave.report_theme_changes = term->report_theme_changes; break;
     case 2048: term->xtsave.size_notifications = term->size_notifications; break;
     case 8452: term->xtsave.sixel_cursor_right_of_graphics = term->sixel.cursor_right_of_graphics; break;
     case 737769: term->xtsave.ime = term_ime_is_enabled(term); break;
@@ -746,6 +754,7 @@ xtrestore(struct terminal *term, unsigned param)
     case 2004: enable = term->xtsave.bracketed_paste; break;
     case 2026: enable = term->xtsave.app_sync_updates; break;
     case 2027: enable = term->xtsave.grapheme_shaping; break;
+    case 2031: enable = term->xtsave.report_theme_changes; break;
     case 2048: enable = term->xtsave.size_notifications; break;
     case 8452: enable = term->xtsave.sixel_cursor_right_of_graphics; break;
     case 737769: enable = term->xtsave.ime; break;
@@ -792,7 +801,17 @@ csi_dispatch(struct terminal *term, uint8_t final)
                 int count = vt_param_get(term, 0, 1);
                 LOG_DBG("REP: '%lc' %d times", (wint_t)term->vt.last_printed, count);
 
-                const int width = c32width(term->vt.last_printed);
+                int width;
+
+                if (term->vt.last_printed >= CELL_COMB_CHARS_LO) {
+                    const struct composed *comp = composed_lookup(
+                        term->composed, term->vt.last_printed - CELL_COMB_CHARS_LO);
+
+                    xassert(comp != NULL);
+                    width = comp->forced_width > 0 ? comp->forced_width : comp->width;
+                } else
+                    width = c32width(term->vt.last_printed);
+
                 if (width > 0) {
                     for (int i = 0; i < count; i++)
                         term_print(term, term->vt.last_printed, width, false);
@@ -833,6 +852,7 @@ csi_dispatch(struct terminal *term, uint8_t final)
              *  - 22   ANSI color, e.g., VT525.
              *  - 28   Rectangular editing.
              *  - 29   ANSI text locator (i.e., DEC Locator mode).
+             *  - 52   Clipboard access
              *
              * Note: we report ourselves as a VT220, mainly to be able
              * to pass parameters, to indicate we support sixel, and
@@ -843,13 +863,15 @@ csi_dispatch(struct terminal *term, uint8_t final)
              *
              * Note: tertiary DA responds with "FOOT".
              */
-            if (term->conf->tweak.sixel) {
-                static const char reply[] = "\033[?62;4;22;28c";
-                term_to_slave(term, reply, sizeof(reply) - 1);
-            } else {
-                static const char reply[] = "\033[?62;22;28c";
-                term_to_slave(term, reply, sizeof(reply) - 1);
-            }
+            char reply[32];
+
+            int len = snprintf(
+                reply, sizeof(reply), "\033[?62%s;22;28%sc",
+                term->conf->tweak.sixel ? ";4" : "",
+                (term->conf->security.osc52 == OSC52_ENABLED ||
+                 term->conf->security.osc52 == OSC52_COPY_ENABLED ? ";52" : ""));
+
+            term_to_slave(term, reply, len);
             break;
         }
 
@@ -1539,6 +1561,32 @@ csi_dispatch(struct terminal *term, uint8_t final)
             break;
         }
 
+        case 'n': {
+            const int param = vt_param_get(term, 0, 0);
+
+            switch (param) {
+            case 996: {  /* Query current theme mode (see private mode 2031) */
+                /*
+                 * 1 - dark mode
+                 * 2 - light mode
+                 *
+                 * In foot, the themes aren't necessarily light/dark,
+                 * but by convention, the primary theme is dark, and
+                 * the alternative theme is light.
+                 */
+                char reply[16] = {0};
+                int chars = snprintf(
+                    reply, sizeof(reply),
+                    "\033[?997;%dn",
+                    term->colors.active_theme == COLOR_THEME_DARK ? 1 : 2);
+
+                term_to_slave(term, reply, chars);
+                break;
+            }
+            }
+            break;
+        }
+
         case 'p': {
             /*
              * Request status of ECMA-48/"ANSI" private mode (DECRQM
@@ -1596,10 +1644,10 @@ csi_dispatch(struct terminal *term, uint8_t final)
                  *  64 - vt520
                  *  65 - vt525
                  *
-                 * Param 2 - firmware version
-                 *  xterm uses its version number. We use an xterm
-                 *  version number too, since e.g. Emacs uses this to
-                 *  determine level of support.
+                 * Param 2 - firmware version xterm uses its version
+                 *  number. We do to, in the format "MAJORMINORPATCH",
+                 *  where all three version numbers are always two
+                 *  digits. So e.g. 1.25.0 is reported as 012500.
                  *
                  * We report ourselves as a VT220. This must be
                  * synchronized with the primary DA response.

cursor-shape.c

@@ -54,7 +54,7 @@ cursor_shape_to_server_shape(enum cursor_shape shape)
 }
 
 enum wp_cursor_shape_device_v1_shape
-cursor_string_to_server_shape(const char *xcursor)
+cursor_string_to_server_shape(const char *xcursor, int bound_version)
 {
     if (xcursor == NULL)
         return 0;
@@ -72,7 +72,7 @@ cursor_string_to_server_shape(const char *xcursor)
         [WP_CURSOR_SHAPE_DEVICE_V1_SHAPE_VERTICAL_TEXT] = {"vertical-text"},
         [WP_CURSOR_SHAPE_DEVICE_V1_SHAPE_ALIAS] = {"alias", "dnd-link"},
         [WP_CURSOR_SHAPE_DEVICE_V1_SHAPE_COPY] = {"copy", "dnd-copy"},
-        [WP_CURSOR_SHAPE_DEVICE_V1_SHAPE_MOVE] = {"move"},  /* dnd-move? */
+        [WP_CURSOR_SHAPE_DEVICE_V1_SHAPE_MOVE] = {"move", "dnd-move"},
         [WP_CURSOR_SHAPE_DEVICE_V1_SHAPE_NO_DROP] = {"no-drop", "dnd-no-drop"},
         [WP_CURSOR_SHAPE_DEVICE_V1_SHAPE_NOT_ALLOWED] = {"not-allowed", "crossed_circle"},
         [WP_CURSOR_SHAPE_DEVICE_V1_SHAPE_GRAB] = {"grab", "hand1"},
@@ -94,9 +94,29 @@ cursor_string_to_server_shape(const char *xcursor)
         [WP_CURSOR_SHAPE_DEVICE_V1_SHAPE_ALL_SCROLL] = {"all-scroll", "fleur"},
         [WP_CURSOR_SHAPE_DEVICE_V1_SHAPE_ZOOM_IN] = {"zoom-in"},
         [WP_CURSOR_SHAPE_DEVICE_V1_SHAPE_ZOOM_OUT] = {"zoom-out"},
+#if defined(WP_CURSOR_SHAPE_DEVICE_V1_SHAPE_DND_ASK_SINCE_VERSION)   /* 1.42 */
+        [WP_CURSOR_SHAPE_DEVICE_V1_SHAPE_DND_ASK] = {"dnd-ask"},
+#endif
+#if defined(WP_CURSOR_SHAPE_DEVICE_V1_SHAPE_ALL_RESIZE_SINCE_VERSION)  /* 1.42 */
+        [WP_CURSOR_SHAPE_DEVICE_V1_SHAPE_ALL_RESIZE] = {"all-resize"},
+#endif
     };
 
     for (size_t i = 0; i < ALEN(table); i++) {
+#if defined(WP_CURSOR_SHAPE_DEVICE_V1_SHAPE_DND_ASK_SINCE_VERSION)
+        if (i == WP_CURSOR_SHAPE_DEVICE_V1_SHAPE_DND_ASK &&
+            bound_version < WP_CURSOR_SHAPE_DEVICE_V1_SHAPE_DND_ASK_SINCE_VERSION)
+        {
+            continue;
+        }
+#endif
+#if defined(WP_CURSOR_SHAPE_DEVICE_V1_SHAPE_ALL_RESIZE_SINCE_VERSION)
+        if (i == WP_CURSOR_SHAPE_DEVICE_V1_SHAPE_ALL_RESIZE &&
+            bound_version < WP_CURSOR_SHAPE_DEVICE_V1_SHAPE_ALL_RESIZE_SINCE_VERSION)
+        {
+            continue;
+        }
+#endif
         for (size_t j = 0; j < ALEN(table[i]); j++) {
             if (table[i][j] != NULL && streq(xcursor, table[i][j])) {
                 return i;

cursor-shape.h

@@ -26,4 +26,4 @@ const char *const *cursor_shape_to_string(enum cursor_shape shape);
 enum wp_cursor_shape_device_v1_shape cursor_shape_to_server_shape(
     enum cursor_shape shape);
 enum wp_cursor_shape_device_v1_shape cursor_string_to_server_shape(
-    const char *xcursor);
+    const char *xcursor, int bound_version);

doc/foot-ctlseqs.7.scd

@@ -337,6 +337,9 @@ that corresponds to one of the following modes:
 |  2027
 :  contour
 :  Grapheme cluster processing
+|  2031
+:  contour
+:  Request color theme updates
 |  2048
 :  TODO
 :  In-band window resize notifications
@@ -657,6 +660,13 @@ manipulation sequences. The generic format is:
 :  xterm
 :  Report the current entry on the palette stack, and the number of
    palettes stored on the stack.
+|  \\E[ ? 996 n
+:  Query the current (color) theme mode
+:  contour
+:  The current color theme mode (light or dark) is reported as *CSI ?
+   997 ; 1|2 n*, where *1* means dark and *2* light. By convention, the
+   primary theme in foot is considered dark, and the alternative theme
+   light.
 
 
 # OSC

doc/foot.1.scd

@@ -67,6 +67,11 @@ the foot command line
 	Value to set the *app-id* property on the Wayland window
 	to. Default: _foot_ (normal mode), or _footclient_ (server mode).
 
+*toplevel-tag*=_TAG_
+	Value to set the *toplevel-tag* property on the Wayland window
+	to. The compositor can use this value for session management,
+	window rules etc. Default: _not set_
+
 *-m*,*--maximized*
 	Start in maximized mode. If both *--maximized* and *--fullscreen*
 	are specified, the _last_ one takes precedence.
@@ -252,9 +257,6 @@ These keyboard shortcuts affect the search selection:
 *ctrl*+*shift*+*left*
 	Extend current selection to the left to the last word boundary.
 
-*ctrl*+*shift*+*w*
-	Extend the current selection to the right to the last whitespace.
-
 *shift*+*down*
 	Extend current selection down one line
 
@@ -689,6 +691,21 @@ variables may be defined in *foot.ini*(5).
 In addition to the variables listed above, custom environment
 variables to unset may be defined in *foot.ini*(5).
 
+# Signals
+
+The following signals have special meaning in foot:
+
+- SIGUSR1: switch to the dark color theme (*[colors-dark]*).
+- SIGUSR2: switch to the light color theme (*[colors-light]*).
+
+Note: you can send SIGUSR1/SIGUSR2 to a *foot --server* process too,
+in which case all client instances will switch theme. Furthermore, all
+future client instances will also use the selected theme.
+
+You can also send SIGUSR1/SIGUSR2 to a footclient instance, see
+*footclient*(1) for details.
+
+
 # BUGS
 
 Please report bugs to https://codeberg.org/dnkl/foot/issues

doc/foot.ini.5.scd

@@ -24,7 +24,7 @@ commented out will usually be installed to */etc/xdg/foot/foot.ini*.
 
 Options are set using KEY=VALUE pairs:
 
-	*\[colors\]*++
+	*\[colors-dark\]*++
 *background=000000*++
 *foreground=ffffff*
 
@@ -207,7 +207,7 @@ empty string to be set, but it must be quoted: *KEY=""*)
 	Compared to the default (disabled), bright glyphs on a dark
 	background will appear thicker, and dark glyphs on a light
 	background will appear thinner.
-
+	
 	FreeType can limit the effect of the latter, with a technique
 	called stem darkening. It is only available for CFF fonts
 	(OpenType, .otf) and disabled by default (in FreeType). You can
@@ -220,13 +220,23 @@ empty string to be set, but it must be quoted: *KEY=""*)
 	than intended when rendered with gamma-correct blending, since the
 	font designer set the font weight based on incorrect rendering.
 	
-	Note that some colors (especially dark ones) will look a bit
-	off. The reason for this is loss of color precision, due to foot
-	using 8-bit surfaces (i.e. each color channel is 8 bits). The
-	amount of errors can be reduced by using 10-bit surfaces; see
-	*tweak.surface-bit-depth*.
+	In order to represent colors faithfully, higher precision image
+	buffers are required. By default, foot will use either 16-bit, or
+	10-bit color channels, depending on availability, when
+	gamma-correct blending is enabled. However, the high precision
+	buffers are slow; if you want to use gamma-correct blending, but
+	prefer speed (throughput and input latency) over accurate colors,
+	you can force 8-bit color channels by setting
+	*tweak.surface-bit-depth=8-bit*.
 	
-	Default: enabled when compositor support is available
+	Default: _no_.
+
+*uppercase-regex-insert*
+	Boolean. When enabled, inputting an uppercase hint character in
+	*show-urls-copy* or *regex-copy* mode will insert the selected
+	text into the prompt in addition to copying it to the clipboard.
+
+	Default: _yes_
 
 *box-drawings-uses-font-glyphs*
 	Boolean. When disabled, foot generates box/line drawing characters
@@ -286,18 +296,29 @@ empty string to be set, but it must be quoted: *KEY=""*)
 
 *pad*
 	Padding between border and glyphs, in pixels (subject to output
-	scaling), in the form _XxY_.
+	scaling), in the form
+	
+	```
+	_XxY_ [center | center-when-fullscreen | center-when-maximized-and-fullscreen]
+	```
 	
 	This will add _at least_ X pixels on both the left and right
-	sides, and Y pixels on the top and bottom sides. The grid content
-	will be anchored in the top left corner. I.e. if the window
-	manager forces an odd window size on foot, the additional pixels
-	will be added to the right and bottom sides.
+	sides, and Y pixels on the top and bottom sides.
 	
-	To instead center the grid content, append *center* (e.g. *pad=5x5
-	center*).
+	When no centering is specified, the grid content is anchored to
+	the top left corner. I.e. if the window manager forces an odd
+	window size on foot, the additional pixels will be added to the
+	right and bottom sides.
 	
-	Default: _0x0_.
+	If *center* is specified, the grid content is instead
+	centered. This may cause "jumpiness" when resizing the window.
+	
+	With *center-when-fullscreen* and
+	*center-when-maximized-and-fullscreen*, the grid is anchored to
+	the top left corner, unless the window is maximized, or
+	fullscreened.
+	
+	Default: _0x0_ center-when-maximized-and-fullscreen.
 
 *resize-delay-ms*
 
@@ -349,6 +370,19 @@ empty string to be set, but it must be quoted: *KEY=""*)
 
 	Default: _yes_
 
+*initial-color-theme*
+	Selects which color theme to use, *dark*, or *light*.
+	
+	*dark* uses the colors defined in the *colors-dark* section, while
+	*light* uses the colors from the *colors-light* section.
+	
+	Use the *color-theme-switch-dark*, *color-theme-switch-light* and
+	*color-theme-toggle* key bindings to switch between the two themes
+	at runtime, or send SIGUSR1/SIGUSR2 to the foot process (see
+	*foot*(1) for details).
+	
+	Default: _1_
+
 *initial-window-size-pixels*
 	Initial window width and height in _pixels_ (subject to output
 	scaling), in the form _WIDTHxHEIGHT_. The height _includes_ the
@@ -395,6 +429,11 @@ empty string to be set, but it must be quoted: *KEY=""*)
 	apply window management rules. Default: _foot_ (normal mode), or
 	_footclient_ (server mode).
 
+*toplevel-tag*
+	Value to set the *toplevel-tag* property on the Wayland window
+	to. The compositor can use this value for session management,
+	window rules etc. Default: _not set_
+
 *bold-text-in-bright*
 	Semi-boolean. When enabled, bold text is rendered in a brighter
 	color (in addition to using a bold font). The color is brightened
@@ -898,15 +937,6 @@ applications can change these at runtime.
 	enabled. Expressed in milliseconds between each blink. Default:
 	_500_.
 
-*color*
-	Two space separated RRGGBB values (i.e. plain old 6-digit hex
-	values, without prefix) specifying the foreground (text) and
-	background (cursor) colors for the cursor.
-	
-	Example: *ff0000 00ff00* (green cursor, red text)
-	
-	Default: the regular foreground and background colors, reversed.
-
 *beam-thickness*
 	Thickness (width) of the beam styled cursor. The value is in
 	points, and its exact value thus depends on the monitor's DPI. To
@@ -957,16 +987,34 @@ applications can change these at runtime.
 
 	Default: _400_.
 
-# SECTION: colors
+# SECTION: colors-dark, colors-light
 
-This section controls the 16 ANSI colors, the default foreground and
-background colors, and the extended 256 color palette. Note that
+These two sections controls the 16 ANSI colors, the default foreground
+and background colors, and the extended 256 color palette. Note that
 applications can change these at runtime.
 
 The colors are in RRGGBB format (i.e. plain old 6-digit hex values,
 without prefix). That is, they do *not* have an alpha component. You
 can configure the background transparency with the _alpha_ option.
 
+*colors-dark* is intended to define a dark color theme, and
+*colors-light* is intended to define a light color theme. You can
+switch between them using the *color-theme-switch-dark*,
+*color-theme-switch-light* and *color-theme-toggle* key bindings, or
+by sending SIGUSR1/SIGUSR2 to the foot process.
+
+The default theme used is *colors-dark*, unless
+*initial-color-theme=light* has been set.
+
+*cursor*
+	Two space separated RRGGBB values (i.e. plain old 6-digit hex
+	values, without prefix) specifying the foreground (text) and
+	background (cursor) colors for the cursor.
+	
+	Example: *ff0000 00ff00* (green cursor, red text)
+	
+	Default: the regular foreground and background colors, reversed.
+
 *foreground*
 	Default foreground color. This is the color used when no ANSI
 	color is being used. Default: _839496_.
@@ -993,7 +1041,8 @@ can configure the background transparency with the _alpha_ option.
 	a color value, and a "dim" attribute.
 	
 	By default, foot implements this by blending the current color
-	with black. This is a generic approach that applies to both
+	with black or white, depending on what the *dim-blend-towards*
+	option is set to . This is a generic approach that applies to both
 	colors from the 256-color palette, as well as 24-bit RGB colors.
 	
 	You can change this behavior by setting the *dimN* options. When
@@ -1048,10 +1097,17 @@ can configure the background transparency with the _alpha_ option.
 	
 	Default: _default_
 
+*dim-blend-towards*
+	Which color to blend towards when "auto" dimming a color (see
+	*dim0*..*dim7* above). One of *black* or *white*. Blending towards
+	black makes the text darker, while blending towards white makes it
+	whiter (but still dimmer than normal text).
+	
+	Default: _black_ (*colors-dark*), _white_ (*colors-light*)
+
 *selection-foreground*, *selection-background*
 	Foreground (text) and background color to use in selected
-	text. Note that *both* options must be set, or the default will be
-	used. Default: _inverse foreground/background_.
+	text. Default: _inverse foreground/background_.
 
 *jump-labels*
 	Two color values specifying the foreground (text) and background
@@ -1327,7 +1383,8 @@ e.g. *search-start=none*.
 *show-urls-copy*
 	Enter URL mode, where all currently visible URLs are tagged with a
 	jump label with a key sequence that will place the URL in the
-	clipboard. Default: _none_.
+	clipboard. If the hint is completed with an uppercase character,
+	the match will also be pasted. Default: _none_.
 
 *regex-launch*
 	Enter regex mode. This works exactly the same as URL mode; all
@@ -1350,8 +1407,10 @@ e.g. *search-start=none*.
 	Default: _none_.
 
 *regex-copy*
-	Same as *regex-copy*, but the match is placed in the clipboard,
-	instead of "launched", upon activation. Default: _none_.
+	Same as *regex-launch*, but the match is placed in the clipboard,
+	instead of "launched", upon activation. If the hint is completed
+	with an uppercase character, the match will also be pasted.
+	Default: _none_.
 
 *prompt-prev*
 	Jump to the previous, currently not visible, prompt (requires
@@ -1387,6 +1446,25 @@ e.g. *search-start=none*.
 	
 	Default: _Control+Shift+u_.
 
+*color-theme-switch-dark*, *color-theme-switch-dark*, *color-theme-toggle*
+	Switch between the dark color theme (defined in the *colors-dark*
+	section), and the light color theme (defined in the *colors-light*
+	section).
+	
+	*color-theme-switch-dark* applies the dark color theme regardless
+	of which color theme is currently active.
+	
+	*color-theme-switch-light* applies the light color theme
+	regardless of which color theme is currently active.
+	
+	*color-theme-toggle* toggles between the primary and alternative
+	color themes.
+	
+	Note: you can also send SIGUSR1/SIGUSR2 to the foot process to
+	change the theme (see *foot*(1) for details.)
+	
+	Default: _none_
+
 *quit*
 	Quit foot. Default: _none_.
 
@@ -1959,6 +2037,32 @@ any of these options.
 	
 	Default: _512_. Maximum allowed: _2048_ (2GB).
 
+*min-stride-alignment*
+	This option controls the minimum stride alignment, in bytes, when
+	allocating SHM buffers.
+	
+	In some circumstances, a compositor can import foot's SHM buffers
+	directly to the GPU, without copying the buffer to GPU memory
+	(typically on integrated graphics). Different drivers have
+	different requirements for this, and one of those requirements is
+	typically the stride alignment. At the time of writing, AMD GPUs
+	require 256-byte alignment.
+	
+	Note that doing a direct import typically disables immediate
+	buffer release (if the compositor supports that), which means foot
+	has to double buffer. This adds a performance penalty in foot, but
+	the overall system performance should still be better.
+	
+	If you are not using integrated graphics, or if the compositor
+	does not support GPU direct imports, this option has close to zero
+	impact. You can save a small amount of memory by setting this to
+	0.
+	
+	Ultimately, it is up to the compositor to decide whether to do
+	immediate buffer releases, or try to optimize GPU imports.
+	
+	Default: _256_
+
 *sixel*
 	Boolean. When enabled, foot will process sixel images. Default:
 	_yes_
@@ -1973,23 +2077,62 @@ any of these options.
 
 *surface-bit-depth*
 	Selects which RGB bit depth to use for image buffers. One of
-	*8-bit*, or *10-bit*.
+	*auto*, *8-bit*, *10-bit* or *16-bit*.
 	
-	The default, *8-bit*, uses 8 bits for all channels, alpha
-	included. When *gamma-correct-blending* is disabled, this is the
-	best option.
+	*auto* chooses bit depth depending on other settings, and
+	availability.
 	
-	When *gamma-correct-blending* is enabled, you may want to enable
-	10-bit surfaces, as that improves color precision. Be aware
-	however, that in this mode, the alpha channel is only 2 bits
-	instead of 8 bits. Thus, if you are using a transparent
-	background, you may want to use the default, *8-bit*, even if you
-	have gamma-correct blending enabled.
+	*8-bit*, uses 8 bits for each color channel, alpha included. This
+	is the default when *gamma-correct-blending=no*.
 	
-	You should also note that 10-bit surface is much slower. This will
-	increase input latency and decrease rendering throughput.
+	*10-bit* uses 10 bits for each RGB channel, and 2 bits for the
+	alpha channel. Thus, it provides higher precision color channels,
+	but a lower precision alpha channel.
 	
-	Default: _8-bit_
+	*16-bit* 16 bits for each color channel, alpha included. If
+	available, this is the default when *gamma-correct-blending=yes*.
+	
+	Note that both *10-bit* and *16-bit* are much slower than *8-bit*;
+	if you want to use gamma-correct blending, and if you prefer speed
+	(throughput and input latency) over accurate colors, you can set
+	*surface-bit-depth=8-bit* explicitly.
+	
+	Default: _auto_
+
+*pre-apply-damage*
+	Boolean. When enabled, foot will attempt to "pre-apply" the damage
+	from the last frame when foot is forced to double-buffer
+	(i.e. when the compositor does not release SHM buffers
+	immediately). All text after this assumes the compositor is not
+	releasing buffers immediately.
+	
+	When this option is disabled, each time foot needs to render a
+	frame, it has to first copy over areas that changed in the last
+	frame (i.e. all changes between the last two frames). This is
+	basically a *memcpy*(3), which can be slow if the changed area is
+	large. It is also done on the main thread, which means foot cannot
+	do anything else at the same time; no other rendering, no VT
+	parsing. After the changes have been brought over to the new
+	frame, foot proceeds with rendering the cells that has changed
+	between the last frame and the new frame.
+	
+	When this option is enabled, the changes between the last two frames
+	are brought over to what will become the next frame before foot
+	starts rendering the next frame. As soon as the compositor
+	releases the previous buffer (typically right after foot has
+	pushed a new frame), foot kicks off a thread that copies over the
+	changes to the newly released buffer. Since this is done in a
+	thread, foot can continue processing input at the same
+	time. Later, when it is time to render a new frame, the changes
+	have already been transferred, and foot can immediately start with
+	the actual rendering.
+	
+	Thus, having this option enabled improves both performance
+	(copying the last two frames' changes is threaded), and improves
+	input latency (rending the next frame no longer has to first bring
+	over the changes between the last two frames).
+	
+	Default: _yes_
 
 # SEE ALSO
 

doc/footclient.1.scd

@@ -33,6 +33,11 @@ terminal has terminated.
 	Value to set the *app-id* property on the Wayland window
 	to. Default: _foot_ (normal mode), or _footclient_ (server mode).
 
+*toplevel-tag*=_TAG_
+	Value to set the *toplevel-tag* property on the Wayland window
+	to. The compositor can use this value for session management,
+	window rules etc. Default: _not set_
+
 *-w*,*--window-size-pixels*=_WIDTHxHEIGHT_
 	Set initial window width and height, in pixels. Default: _700x500_.
 
@@ -189,6 +194,21 @@ variables may be defined in *foot.ini*(5).
 In addition to the variables listed above, custom environment
 variables to unset may be defined in *foot.ini*(5).
 
+# Signals
+
+The following signals have special meaning in footclient:
+
+- SIGUSR1: switch to the dark color theme (*[colors-dark]*).
+- SIGUSR2: switch to the light color theme (*[colors-light]*).
+
+When sending SIGUSR1/SIGUSR2 to a footclient instance, the theme is
+changed in that instance only. This is different from when you send
+SIGUSR1/SIGUSR2 to the server process, where all instances change the
+theme.
+
+Note: for obvious reasons, this is not supported when footclient is
+started with *--no-wait*.
+
 # SEE ALSO
 
 *foot*(1)

extract.c

@@ -256,8 +256,8 @@ extract_one(const struct terminal *term, const struct row *row,
                 }
             }
 
-            xassert(next_tab_stop >= col);
-            ctx->tab_spaces_left = next_tab_stop - col;
+            if (next_tab_stop > col)
+                ctx->tab_spaces_left = next_tab_stop - col - 1;
         }
     }
 

fdm.c

@@ -18,6 +18,18 @@
 #include "debug.h"
 #include "xmalloc.h"
 
+#if !defined(SIGABBREV_NP)
+#include <stdio.h>
+
+static const char *
+sigabbrev_np(int sig)
+{
+    static char buf[16];
+    snprintf(buf, sizeof(buf), "<%d>", sig);
+    return buf;
+}
+#endif
+
 struct fd_handler {
     int fd;
     int events;
@@ -113,7 +125,8 @@ fdm_destroy(struct fdm *fdm)
 
     for (int i = 0; i < SIGRTMAX; i++) {
         if (fdm->signal_handlers[i].callback != NULL)
-            LOG_WARN("handler for signal %d not removed", i);
+            LOG_WARN("handler for signal %d (SIG%s) not removed",
+                     i, sigabbrev_np(i));
     }
 
     if (tll_length(fdm->hooks_low) > 0 ||
@@ -338,7 +351,8 @@ bool
 fdm_signal_add(struct fdm *fdm, int signo, fdm_signal_handler_t handler, void *data)
 {
     if (fdm->signal_handlers[signo].callback != NULL) {
-        LOG_ERR("signal %d already has a handler", signo);
+        LOG_ERR("signal %d (SIG%s) already has a handler",
+                signo, sigabbrev_np(signo));
         return false;
     }
 
@@ -347,14 +361,16 @@ fdm_signal_add(struct fdm *fdm, int signo, fdm_signal_handler_t handler, void *d
     sigaddset(&mask, signo);
 
     if (sigprocmask(SIG_BLOCK, &mask, &original) < 0) {
-        LOG_ERRNO("failed to block signal %d", signo);
+        LOG_ERRNO("failed to block signal %d (SIG%s)",
+                  signo, sigabbrev_np(signo));
         return false;
     }
 
     struct sigaction action = {.sa_handler = &signal_handler};
     sigemptyset(&action.sa_mask);
     if (sigaction(signo, &action, NULL) < 0) {
-        LOG_ERRNO("failed to set signal handler for signal %d", signo);
+        LOG_ERRNO("failed to set signal handler for signal %d (SIG%s)",
+                  signo, sigabbrev_np(signo));
         sigprocmask(SIG_SETMASK, &original, NULL);
         return false;
     }
@@ -374,7 +390,8 @@ fdm_signal_del(struct fdm *fdm, int signo)
     struct sigaction action = {.sa_handler = SIG_DFL};
     sigemptyset(&action.sa_mask);
     if (sigaction(signo, &action, NULL) < 0) {
-        LOG_ERRNO("failed to restore signal handler for signal %d", signo);
+        LOG_ERRNO("failed to restore signal handler for signal %d (SIG%s)",
+                  signo, sigabbrev_np(signo));
         return false;
     }
 
@@ -386,7 +403,8 @@ fdm_signal_del(struct fdm *fdm, int signo)
     sigemptyset(&mask);
     sigaddset(&mask, signo);
     if (sigprocmask(SIG_UNBLOCK, &mask, NULL) < 0) {
-        LOG_ERRNO("failed to unblock signal %d", signo);
+        LOG_ERRNO("failed to unblock signal %d (SIG%s)",
+                  signo, sigabbrev_np(signo));
         return false;
     }
 

foot-features.c

@@ -22,6 +22,12 @@ const char version_and_features[] =
     " -graphemes"
 #endif
 
+#if defined(HAVE_XDG_TOPLEVEL_TAG)
+    " +toplevel-tag"
+#else
+    " -toplevel-tag"
+#endif
+
 #if !defined(NDEBUG)
     " +assertions"
 #else

foot.ini

@@ -22,11 +22,13 @@
 # strikeout-thickness=<font strikeout thickness>
 # box-drawings-uses-font-glyphs=no
 # dpi-aware=no
+# gamma-correct-blending=no
 
+# initial-color-theme=dark
 # initial-window-size-pixels=700x500  # Or,
 # initial-window-size-chars=<COLSxROWS>
 # initial-window-mode=windowed
-# pad=0x0                             # optionally append 'center'
+# pad=0x0 center-when-maximized-and-fullscreen
 # resize-by-cells=yes
 # resize-keep-grid=yes
 # resize-delay-ms=100
@@ -38,6 +40,8 @@
 # utmp-helper=/usr/lib/utempter/utempter  # When utmp backend is ‘libutempter’ (Linux)
 # utmp-helper=/usr/libexec/ulog-helper    # When utmp backend is ‘ulog’ (FreeBSD)
 
+# uppercase-regex-insert=yes
+
 [environment]
 # name=value
 
@@ -85,7 +89,6 @@
 
 [cursor]
 # style=block
-# color=<inverse foreground/background>
 # blink=no
 # blink-rate=500
 # beam-thickness=1.5
@@ -98,7 +101,7 @@
 [touch]
 # long-press-delay=400
 
-[colors]
+[colors-dark]
 # alpha=1.0
 # alpha-mode=default # Can be `default`, `matching` or `all`
 # background=242424
@@ -106,6 +109,8 @@
 # flash=7f7f00
 # flash-alpha=0.5
 
+# cursor=<inverse foreground/background>
+
 ## Normal/regular colors (color palette 0-7)
 # regular0=242424  # black
 # regular1=f62b5a  # red
@@ -127,6 +132,7 @@
 # bright7=ffffff   # bright white
 
 ## dimmed colors (see foot.ini(5) man page)
+# dim-blend-towards=black
 # dim0=<not set>
 # ...
 # dim7=<not-set>
@@ -163,6 +169,11 @@
 # search-box-match=<regular0> <regular3>     # black-on-yellow
 # urls=<regular3>
 
+[colors-light]
+# Alternative color theme, see man page foot.ini(5)
+# Same builtin defaults as [color], except for:
+# dim-blend-towards=white
+
 [csd]
 # preferred=server
 # size=26
@@ -208,6 +219,9 @@
 # prompt-prev=Control+Shift+z
 # prompt-next=Control+Shift+x
 # unicode-input=Control+Shift+u
+# color-theme-switch-1=none
+# color-theme-switch-2=none
+# color-theme-toggle=none
 # noop=none
 # quit=none
 

input.c

@@ -40,6 +40,7 @@
 #include "url-mode.h"
 #include "util.h"
 #include "vt.h"
+#include "xkbcommon-vmod.h"
 #include "xmalloc.h"
 #include "xsnprintf.h"
 
@@ -119,10 +120,14 @@ execute_binding(struct seat *seat, struct terminal *term,
 
     case BIND_ACTION_SCROLLBACK_UP_MOUSE:
         if (term->grid == &term->alt) {
-            if (term->alt_scrolling)
+            if (term->alt_scrolling) {
                 alternate_scroll(seat, amount, BTN_BACK);
-        } else
-                cmd_scrollback_up(term, amount);
+                return true;
+            }
+        } else {
+            cmd_scrollback_up(term, amount);
+            return true;
+        }
         break;
 
     case BIND_ACTION_SCROLLBACK_DOWN_PAGE:
@@ -148,10 +153,14 @@ execute_binding(struct seat *seat, struct terminal *term,
 
     case BIND_ACTION_SCROLLBACK_DOWN_MOUSE:
         if (term->grid == &term->alt) {
-            if (term->alt_scrolling)
+            if (term->alt_scrolling) {
                 alternate_scroll(seat, amount, BTN_FORWARD);
-        } else
+                return true;
+            }
+        } else {
             cmd_scrollback_down(term, amount);
+            return true;
+        }
         break;
 
     case BIND_ACTION_SCROLLBACK_HOME:
@@ -484,6 +493,20 @@ execute_binding(struct seat *seat, struct terminal *term,
 
         return true;
 
+    case BIND_ACTION_THEME_SWITCH_1:
+    case BIND_ACTION_THEME_SWITCH_DARK:
+        term_theme_switch_to_dark(term);
+        return true;
+
+    case BIND_ACTION_THEME_SWITCH_2:
+    case BIND_ACTION_THEME_SWITCH_LIGHT:
+        term_theme_switch_to_light(term);
+        return true;
+
+    case BIND_ACTION_THEME_TOGGLE:
+        term_theme_toggle(term);
+        return true;
+
     case BIND_ACTION_SELECT_BEGIN:
         selection_start(
             term, seat->mouse.col, seat->mouse.row, SELECTION_CHAR_WISE, false);
@@ -520,7 +543,7 @@ execute_binding(struct seat *seat, struct terminal *term,
     case BIND_ACTION_SELECT_QUOTE:
         selection_start(
             term, seat->mouse.col, seat->mouse.row, SELECTION_QUOTE_WISE, false);
-        break;
+        return true;
 
     case BIND_ACTION_SELECT_ROW:
         selection_start(
@@ -563,23 +586,20 @@ keyboard_keymap(void *data, struct wl_keyboard *wl_keyboard,
     /* Verify keymap is in a format we understand */
     switch ((enum wl_keyboard_keymap_format)format) {
     case WL_KEYBOARD_KEYMAP_FORMAT_NO_KEYMAP:
-        close(fd);
-        return;
+        goto err;
 
     case WL_KEYBOARD_KEYMAP_FORMAT_XKB_V1:
         break;
 
     default:
         LOG_WARN("unrecognized keymap format: %u", format);
-        close(fd);
-        return;
+        goto err;
     }
 
     char *map_str = mmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, 0);
     if (map_str == MAP_FAILED) {
         LOG_ERRNO("failed to mmap keyboard keymap");
-        close(fd);
-        return;
+        goto err;
     }
 
     while (map_str[size - 1] == '\0')
@@ -592,6 +612,8 @@ keyboard_keymap(void *data, struct wl_keyboard *wl_keyboard,
 
     }
 
+    munmap(map_str, size);
+
     if (seat->kbd.xkb_keymap != NULL) {
         seat->kbd.xkb_state = xkb_state_new(seat->kbd.xkb_keymap);
 
@@ -672,10 +694,10 @@ keyboard_keymap(void *data, struct wl_keyboard *wl_keyboard,
         seat->kbd.key_arrow_down = xkb_keymap_key_by_name(seat->kbd.xkb_keymap, "DOWN");
     }
 
-    munmap(map_str, size);
-    close(fd);
-
     key_binding_load_keymap(wayl->key_binding_manager, seat);
+
+err:
+    close(fd);
 }
 
 static void
@@ -1583,6 +1605,9 @@ key_press_release(struct seat *seat, struct terminal *term, uint32_t serial,
     if (released)
         stop_repeater(seat, key);
 
+    if (pressed)
+        seat->kbd.last_shortcut_sym = XKB_KEYSYM_MAX + 1;
+
     bool should_repeat =
         pressed && xkb_keymap_key_repeats(seat->kbd.xkb_keymap, key);
 
@@ -1684,6 +1709,7 @@ key_press_release(struct seat *seat, struct terminal *term, uint32_t serial,
                 if (bind->k.sym == raw_syms[i] &&
                     execute_binding(seat, term, bind, serial, 1))
                 {
+                    seat->kbd.last_shortcut_sym = sym;
                     goto maybe_repeat;
                 }
             }
@@ -1697,6 +1723,7 @@ key_press_release(struct seat *seat, struct terminal *term, uint32_t serial,
                 bind->mods == (mods & ~consumed) &&
                 execute_binding(seat, term, bind, serial, 1))
             {
+                seat->kbd.last_shortcut_sym = sym;
                 goto maybe_repeat;
             }
         }
@@ -1712,12 +1739,31 @@ key_press_release(struct seat *seat, struct terminal *term, uint32_t serial,
                 if (code->item == key &&
                     execute_binding(seat, term, bind, serial, 1))
                 {
+                    seat->kbd.last_shortcut_sym = sym;
                     goto maybe_repeat;
                 }
             }
         }
     }
 
+    if (released && seat->kbd.last_shortcut_sym == sym) {
+        /*
+         * Don't process a release event, if it corresponds to a
+         * triggered shortcut.
+         *
+         * 1. If we consumed a key (press) event, we shouldn't emit an
+         *    escape for its release event.
+         * 2. Ignoring the incorrectness of doing so; this also caused
+         *    us to reset the viewport.
+         *
+         * Background: if the kitty keyboard protocol was enabled,
+         * then the viewport was instantly reset to the bottom, after
+         * scrolling up.
+         */
+        //seat->kbd.last_shortcut_sym = XKB_KEYSYM_MAX + 1;
+        goto maybe_repeat;
+    }
+
     /*
      * Keys generating escape sequences
      */
@@ -1865,7 +1911,7 @@ keyboard_modifiers(void *data, struct wl_keyboard *wl_keyboard, uint32_t serial,
 UNITTEST
 {
     int chan[2];
-    pipe2(chan, O_CLOEXEC);
+    xassert(pipe2(chan, O_CLOEXEC) == 0);
 
     xassert(chan[0] >= 0);
     xassert(chan[1] >= 0);

key-binding.c

@@ -11,6 +11,7 @@
 #include "terminal.h"
 #include "util.h"
 #include "wayland.h"
+#include "xkbcommon-vmod.h"
 #include "xmalloc.h"
 
 struct vmod_map {

key-binding.h

@@ -43,6 +43,11 @@ enum bind_action_normal {
     BIND_ACTION_QUIT,
     BIND_ACTION_REGEX_LAUNCH,
     BIND_ACTION_REGEX_COPY,
+    BIND_ACTION_THEME_SWITCH_1,
+    BIND_ACTION_THEME_SWITCH_2,
+    BIND_ACTION_THEME_SWITCH_DARK,
+    BIND_ACTION_THEME_SWITCH_LIGHT,
+    BIND_ACTION_THEME_TOGGLE,
 
     /* Mouse specific actions - i.e. they require a mouse coordinate */
     BIND_ACTION_SCROLLBACK_UP_MOUSE,
@@ -56,7 +61,7 @@ enum bind_action_normal {
     BIND_ACTION_SELECT_QUOTE,
     BIND_ACTION_SELECT_ROW,
 
-    BIND_ACTION_KEY_COUNT = BIND_ACTION_REGEX_COPY + 1,
+    BIND_ACTION_KEY_COUNT = BIND_ACTION_THEME_TOGGLE + 1,
     BIND_ACTION_COUNT = BIND_ACTION_SELECT_ROW + 1,
 };
 

main.c

@@ -45,6 +45,33 @@ fdm_sigint(struct fdm *fdm, int signo, void *data)
     return true;
 }
 
+struct sigusr_context {
+    struct terminal *term;
+    struct server *server;
+};
+
+static bool
+fdm_sigusr(struct fdm *fdm, int signo, void *data)
+{
+    xassert(signo == SIGUSR1 || signo == SIGUSR2);
+
+    struct sigusr_context *ctx = data;
+
+    if (ctx->server != NULL) {
+        if (signo == SIGUSR1)
+            server_global_theme_switch_to_dark(ctx->server);
+        else
+            server_global_theme_switch_to_light(ctx->server);
+    } else {
+        if (signo == SIGUSR1)
+            term_theme_switch_to_dark(ctx->term);
+        else
+            term_theme_switch_to_light(ctx->term);
+    }
+
+    return true;
+}
+
 static void
 print_usage(const char *prog_name)
 {
@@ -57,6 +84,7 @@ print_usage(const char *prog_name)
         "  -t,--term=TERM                           value to set the environment variable TERM to (" FOOT_DEFAULT_TERM ")\n"
         "  -T,--title=TITLE                         initial window title (foot)\n"
         "  -a,--app-id=ID                           window application ID (foot)\n"
+        "     --toplevel-tag=TAG                    set a custom toplevel tag\n"
         "  -m,--maximized                           start in maximized mode\n"
         "  -F,--fullscreen                          start in fullscreen mode\n"
         "  -L,--login-shell                         start shell as a login shell\n"
@@ -158,6 +186,7 @@ sanitize_signals(void)
 
 enum {
     PTY_OPTION = CHAR_MAX + 1,
+    TOPLEVEL_TAG_OPTION = CHAR_MAX + 2,
 };
 
 int
@@ -187,6 +216,7 @@ main(int argc, char *const *argv)
         {"term",                   required_argument, NULL, 't'},
         {"title",                  required_argument, NULL, 'T'},
         {"app-id",                 required_argument, NULL, 'a'},
+        {"toplevel-tag",           required_argument, NULL, TOPLEVEL_TAG_OPTION},
         {"login-shell",            no_argument,       NULL, 'L'},
         {"working-directory",      required_argument, NULL, 'D'},
         {"font",                   required_argument, NULL, 'f'},
@@ -258,6 +288,10 @@ main(int argc, char *const *argv)
             tll_push_back(overrides, xstrjoin("app-id=", optarg));
             break;
 
+        case TOPLEVEL_TAG_OPTION:
+            tll_push_back(overrides, xstrjoin("toplevel-tag=", optarg));
+            break;
+
         case 'D': {
             struct stat st;
             if (stat(optarg, &st) < 0 || !(st.st_mode & S_IFDIR)) {
@@ -570,6 +604,7 @@ main(int argc, char *const *argv)
     }
 
     shm_set_max_pool_size(conf.tweak.max_shm_pool_size);
+    shm_set_min_stride_alignment(conf.tweak.min_stride_alignment);
 
     if ((fdm = fdm_init()) == NULL)
         goto out;
@@ -608,6 +643,17 @@ main(int argc, char *const *argv)
         goto out;
     }
 
+    struct sigusr_context sigusr_context = {
+        .term = term,
+        .server = server,
+    };
+
+    if (!fdm_signal_add(fdm, SIGUSR1, &fdm_sigusr, &sigusr_context) ||
+        !fdm_signal_add(fdm, SIGUSR2, &fdm_sigusr, &sigusr_context))
+    {
+        goto out;
+    }
+
     struct sigaction sig_ign = {.sa_handler = SIG_IGN};
     sigemptyset(&sig_ign.sa_mask);
     if (sigaction(SIGHUP, &sig_ign, NULL) < 0 ||
@@ -643,6 +689,8 @@ out:
     wayl_destroy(wayl);
     key_binding_manager_destroy(key_binding_manager);
     reaper_destroy(reaper);
+    fdm_signal_del(fdm, SIGUSR1);
+    fdm_signal_del(fdm, SIGUSR2);
     fdm_signal_del(fdm, SIGTERM);
     fdm_signal_del(fdm, SIGINT);
     fdm_destroy(fdm);

meson.build

@@ -1,5 +1,5 @@
 project('foot', 'c',
-        version: '1.22.1',
+        version: '1.25.0',
         license: 'MIT',
         meson_version: '>=0.59.0',
         default_options: [
@@ -25,6 +25,12 @@ if cc.has_function('execvpe',
   add_project_arguments('-DEXECVPE', language: 'c')
 endif
 
+if cc.has_function('sigabbrev_np',
+                   args: ['-D_GNU_SOURCE'],
+                   prefix: '#include <string.h>')
+  add_project_arguments('-DSIGABBREV_NP', language: 'c')
+endif
+
 utmp_backend = get_option('utmp-backend')
 if utmp_backend == 'auto'
   host_os = host_machine.system()
@@ -47,7 +53,7 @@ if utmp_backend == 'none'
 elif utmp_backend == 'libutempter'
   utmp_add = 'add'
   utmp_del = 'del'
-  utmp_del_have_argument = true
+  utmp_del_have_argument = false
   if utmp_default_helper_path == 'auto'
     utmp_default_helper_path = join_paths('/usr', get_option('libdir'), 'utempter', 'utempter')
   endif
@@ -137,7 +143,7 @@ wayland_protocols = dependency('wayland-protocols', version: '>=1.41',
                                default_options: ['tests=false'])
 wayland_client = dependency('wayland-client')
 wayland_cursor = dependency('wayland-cursor')
-xkb = dependency('xkbcommon', version: '>=1.8.0')
+xkb = dependency('xkbcommon', version: '>=1.0.0')
 fontconfig = dependency('fontconfig')
 utf8proc = dependency('libutf8proc', required: get_option('grapheme-clustering'))
 
@@ -145,6 +151,10 @@ if utf8proc.found()
   add_project_arguments('-DFOOT_GRAPHEME_CLUSTERING=1', language: 'c')
 endif
 
+if pixman.version().version_compare('>=0.46.0')
+  add_project_arguments('-DHAVE_PIXMAN_RGBA_16', language: 'c')
+endif
+
 tllist = dependency('tllist', version: '>=1.1.0', fallback: 'tllist')
 fcft = dependency('fcft', version: ['>=3.3.1', '<4.0.0'], fallback: 'fcft')
 
@@ -172,7 +182,12 @@ wl_proto_xml = [
   wayland_protocols_datadir / 'staging/xdg-toplevel-icon/xdg-toplevel-icon-v1.xml',
   wayland_protocols_datadir / 'staging/xdg-system-bell/xdg-system-bell-v1.xml',
   wayland_protocols_datadir / 'staging/color-management/color-management-v1.xml',
-  ]
+]
+
+if (wayland_protocols.version().version_compare('>=1.43'))
+  wl_proto_xml += [wayland_protocols_datadir / 'staging/xdg-toplevel-tag/xdg-toplevel-tag-v1.xml']
+  add_project_arguments('-DHAVE_XDG_TOPLEVEL_TAG=1', language: 'c')
+endif
 
 foreach prot : wl_proto_xml
   wl_proto_headers += custom_target(
@@ -315,6 +330,7 @@ executable(
   'url-mode.c', 'url-mode.h',
   'user-notification.c', 'user-notification.h',
   'wayland.c', 'wayland.h', 'shm-formats.h',
+  'xkbcommon-vmod.h',
   srgb_funcs, wl_proto_src + wl_proto_headers, version,
   dependencies: [math, threads, libepoll, pixman, wayland_client, wayland_cursor, xkb, fontconfig, utf8proc,
                  tllist, fcft],

notify.c

@@ -114,7 +114,7 @@ consume_stdout(struct notification *notif, bool eof)
     while (left > 0) {
         line = data;
         size_t len = left;
-        char *eol = memchr(line, '\n', left);
+        char *eol = (char *)memchr(line, '\n', left);
 
         if (eol != NULL) {
             *eol = '\0';

osc.c

@@ -73,16 +73,19 @@ osc_to_clipboard(struct terminal *term, const char *target,
     }
 
     char *decoded = base64_decode(base64_data, NULL);
-    if (decoded == NULL) {
-        if (errno == EINVAL)
-            LOG_WARN("OSC: invalid clipboard data: %s", base64_data);
-        else
-            LOG_ERRNO("base64_decode() failed");
+    if (decoded == NULL || decoded[0] == '\0') {
+        if (decoded == NULL) {
+            if (errno == EINVAL)
+                LOG_WARN("OSC: invalid clipboard data: %s", base64_data);
+            else
+                LOG_ERRNO("base64_decode() failed");
+        }
 
         if (to_clipboard)
             selection_clipboard_unset(seat);
         if (to_primary)
             selection_primary_unset(seat);
+        free(decoded);
         return;
     }
 
@@ -510,7 +513,7 @@ osc_uri(struct terminal *term, char *string)
          key_value = strtok_r(NULL, ":", &ctx))
     {
         const char *key = key_value;
-        char *operator = strchr(key_value, '=');
+        char *operator = (char *)strchr(key_value, '=');
 
         if (operator == NULL)
             continue;
@@ -522,12 +525,14 @@ osc_uri(struct terminal *term, char *string)
             id = sdbm_hash(value);
     }
 
-    LOG_DBG("OSC-8: URL=%s, id=%" PRIu64, uri, id);
 
-    if (uri[0] == '\0')
+    if (uri[0] == '\0') {
+        LOG_DBG("OSC-8: close");
         term_osc8_close(term);
-    else
+    } else {
+        LOG_DBG("OSC-8: URL=%s, id=%" PRIu64, uri, id);
         term_osc8_open(term, id, uri);
+    }
 }
 
 static void
@@ -1455,15 +1460,20 @@ osc_dispatch(struct terminal *term)
 
         case 11:
             term->colors.bg = color;
-            if (have_alpha) {
-                const bool changed = term->colors.alpha != alpha;
-                term->colors.alpha = alpha;
-
-                if (changed) {
-                    wayl_win_alpha_changed(term->window);
-                    term_font_subpixel_changed(term);
-                }
+            if (!have_alpha) {
+                alpha = term->colors.active_theme == COLOR_THEME_DARK
+                    ? term->conf->colors_dark.alpha
+                    : term->conf->colors_light.alpha;
             }
+
+            const bool changed = term->colors.alpha != alpha;
+            term->colors.alpha = alpha;
+
+            if (changed) {
+                wayl_win_alpha_changed(term->window);
+                term_font_subpixel_changed(term);
+            }
+
             term_damage_color(term, COLOR_DEFAULT, 0);
             term_damage_margins(term);
             break;
@@ -1475,12 +1485,10 @@ osc_dispatch(struct terminal *term)
 
         case 17:
             term->colors.selection_bg = color;
-            term->colors.use_custom_selection = true;
             break;
 
         case 19:
             term->colors.selection_fg = color;
-            term->colors.use_custom_selection = true;
             break;
         }
 
@@ -1509,10 +1517,14 @@ osc_dispatch(struct terminal *term)
     case 104: {
         /* Reset Color Number 'c' (whole table if no parameter) */
 
+        const struct color_theme *theme =
+            term->colors.active_theme == COLOR_THEME_DARK
+                ? &term->conf->colors_dark
+                : &term->conf->colors_light;
+
         if (string[0] == '\0') {
             LOG_DBG("resetting all colors");
-            for (size_t i = 0; i < ALEN(term->colors.table); i++)
-                term->colors.table[i] = term->conf->colors.table[i];
+            memcpy(term->colors.table, theme->table, sizeof(term->colors.table));
             term_damage_view(term);
         }
 
@@ -1534,7 +1546,7 @@ osc_dispatch(struct terminal *term)
                 }
 
                 LOG_DBG("resetting color #%u", idx);
-                term->colors.table[idx] = term->conf->colors.table[idx];
+                term->colors.table[idx] = theme->table[idx];
                 term_damage_color(term, COLOR_BASE256, idx);
             }
 
@@ -1547,16 +1559,28 @@ osc_dispatch(struct terminal *term)
 
     case 110: /* Reset default text foreground color */
         LOG_DBG("resetting foreground color");
-        term->colors.fg = term->conf->colors.fg;
+
+        const struct color_theme *theme =
+            term->colors.active_theme == COLOR_THEME_DARK
+                ? &term->conf->colors_dark
+                : &term->conf->colors_light;
+
+        term->colors.fg = theme->fg;
         term_damage_color(term, COLOR_DEFAULT, 0);
         break;
 
     case 111: { /* Reset default text background color */
         LOG_DBG("resetting background color");
-        bool alpha_changed = term->colors.alpha != term->conf->colors.alpha;
 
-        term->colors.bg = term->conf->colors.bg;
-        term->colors.alpha = term->conf->colors.alpha;
+        const struct color_theme *theme =
+            term->colors.active_theme == COLOR_THEME_DARK
+                ? &term->conf->colors_dark
+                : &term->conf->colors_light;
+
+        bool alpha_changed = term->colors.alpha != theme->alpha;
+
+        term->colors.bg = theme->bg;
+        term->colors.alpha = theme->alpha;
 
         if (alpha_changed) {
             wayl_win_alpha_changed(term->window);
@@ -1568,24 +1592,49 @@ osc_dispatch(struct terminal *term)
         break;
     }
 
-    case 112:
+    case 112: {
         LOG_DBG("resetting cursor color");
-        term->colors.cursor_fg = term->conf->cursor.color.text;
-        term->colors.cursor_bg = term->conf->cursor.color.cursor;
+
+        const struct color_theme *theme =
+            term->colors.active_theme == COLOR_THEME_DARK
+                ? &term->conf->colors_dark
+                : &term->conf->colors_light;
+
+        term->colors.cursor_fg = theme->cursor.text;
+        term->colors.cursor_bg = theme->cursor.cursor;
+
+        if (term->conf->colors_dark.use_custom.cursor) {
+            term->colors.cursor_fg |= 1u << 31;
+            term->colors.cursor_bg |= 1u << 31;
+        }
+
         term_damage_cursor(term);
         break;
+    }
 
-    case 117:
+    case 117: {
         LOG_DBG("resetting selection background color");
-        term->colors.selection_bg = term->conf->colors.selection_bg;
-        term->colors.use_custom_selection = term->conf->colors.use_custom.selection;
-        break;
 
-    case 119:
-        LOG_DBG("resetting selection foreground color");
-        term->colors.selection_fg = term->conf->colors.selection_fg;
-        term->colors.use_custom_selection = term->conf->colors.use_custom.selection;
+        const struct color_theme *theme =
+            term->colors.active_theme == COLOR_THEME_DARK
+                ? &term->conf->colors_dark
+                : &term->conf->colors_light;
+
+        term->colors.selection_bg = theme->selection_bg;
         break;
+    }
+
+    case 119: {
+        LOG_DBG("resetting selection foreground color");
+
+        const struct color_theme *theme =
+            term->colors.active_theme == COLOR_THEME_DARK
+                ? &term->conf->colors_dark
+                : &term->conf->colors_light;
+
+        term->colors.selection_fg = theme->selection_fg;
+        break;
+    }
 
     case 133:
         /*

pgo/pgo.c

@@ -74,6 +74,8 @@ void render_refresh_icon(struct terminal *term) {}
 
 void render_overlay(struct terminal *term) {}
 
+void render_buffer_release_callback(struct buffer *buf, void *data) {}
+
 bool
 render_xcursor_is_valid(const struct seat *seat, const char *cursor)
 {
@@ -129,7 +131,7 @@ render_worker_thread(void *_ctx)
 }
 
 bool
-render_do_linear_blending(const struct terminal *term)
+wayl_do_linear_blending(const struct wayland *wayl, const struct config *conf)
 {
     return false;
 }
@@ -201,11 +203,13 @@ void urls_reset(struct terminal *term) {}
 
 void shm_unref(struct buffer *buf) {}
 void shm_chain_free(struct buffer_chain *chain) {}
+enum shm_bit_depth shm_chain_bit_depth(const struct buffer_chain *chain) { return SHM_BITS_8; }
 
 struct buffer_chain *
 shm_chain_new(
     struct wayland *wayl, bool scrollable, size_t pix_instances,
-    bool ten_bit_it_if_capable)
+    enum shm_bit_depth desired_bit_depth,
+    void (*release_cb)(struct buffer *buf, void *data), void *cb_data)
 {
     return NULL;
 }

pyproject.toml

@@ -0,0 +1,10 @@
+[tool.pyright]
+strict = ['scripts']
+
+[tool.mypy]
+files = '$MYPY_CONFIG_FILE_DIR/scripts'
+strict = true
+
+[tool.codespell]
+skip = 'pyproject.toml,./subprojects,./pkg,./src,./bld,foot.info,./unicode,./venv'
+ignore-regex = 'terminfo capability `rin`|\* Simon Ser|\* \[zar\]\(https://codeberg.org/zar\)|iterm theme|iterm.toml|iterm/OneHalfDark.itermcolors'

quirks.c

@@ -67,6 +67,7 @@ quirk_weston_csd_off(struct terminal *term)
         quirk_weston_subsurface_desync_off(term->window->csd.surface[i].sub);
 }
 
+#if 0
 static bool
 is_sway(void)
 {
@@ -82,13 +83,4 @@ is_sway(void)
 
     return is_sway;
 }
-
-void
-quirk_sway_subsurface_unmap(struct terminal *term)
-{
-    return;
-    if (!is_sway())
-        return;
-
-    wl_surface_damage_buffer(term->window->surface.surf, 0, 0, INT32_MAX, INT32_MAX);
-}
+#endif

quirks.h

@@ -21,5 +21,3 @@ void quirk_weston_subsurface_desync_off(struct wl_subsurface *sub);
 /* Shortcuts to call desync_{on,off} on all CSD subsurfaces */
 void quirk_weston_csd_on(struct terminal *term);
 void quirk_weston_csd_off(struct terminal *term);
-
-void quirk_sway_subsurface_unmap(struct terminal *term);

render.c

@@ -293,7 +293,7 @@ static inline uint32_t
 color_dim(const struct terminal *term, uint32_t color)
 {
     const struct config *conf = term->conf;
-    const uint8_t custom_dim = conf->colors.use_custom.dim;
+    const uint8_t custom_dim = conf->colors_dark.use_custom.dim;
 
     if (unlikely(custom_dim != 0)) {
         for (size_t i = 0; i < 8; i++) {
@@ -302,7 +302,7 @@ color_dim(const struct terminal *term, uint32_t color)
 
             if (term->colors.table[0 + i] == color) {
                 /* "Regular" color, return the corresponding "dim" */
-                return conf->colors.dim[i];
+                return conf->colors_dark.dim[i];
             }
 
             else if (term->colors.table[8 + i] == color) {
@@ -312,7 +312,14 @@ color_dim(const struct terminal *term, uint32_t color)
         }
     }
 
-    return color_blend_towards(color, 0x00000000, conf->dim.amount);
+    const struct color_theme *theme = term->colors.active_theme == COLOR_THEME_DARK
+        ? &conf->colors_dark
+        : &conf->colors_light;
+
+    return color_blend_towards(
+        color,
+        theme->dim_blend_towards == DIM_BLEND_TOWARDS_BLACK ? 0x00000000 : 0x00ffffff,
+        conf->dim.amount);
 }
 
 static inline uint32_t
@@ -626,7 +633,7 @@ draw_cursor(const struct terminal *term, const struct cell *cell,
     pixman_color_t cursor_color;
     pixman_color_t text_color;
     cursor_colors_for_cell(term, cell, fg, bg, &cursor_color, &text_color,
-                           render_do_linear_blending(term));
+                           wayl_do_linear_blending(term->wl, term->conf));
 
     if (unlikely(!term->kbd_focus)) {
         switch (term->conf->cursor.unfocused_style) {
@@ -694,58 +701,82 @@ render_cell(struct terminal *term, pixman_image_t *pix,
     const int x = term->margins.left + col * width;
     const int y = term->margins.top + row_no * height;
 
-    bool is_selected = cell->attrs.selected;
-
     uint32_t _fg = 0;
     uint32_t _bg = 0;
 
     uint16_t alpha = 0xffff;
+    const bool is_selected = cell->attrs.selected;
+
+    /* Use cell specific color, if set, otherwise the default colors (possible reversed) */
+    switch (cell->attrs.fg_src) {
+    case COLOR_RGB:
+        _fg = cell->attrs.fg;
+        break;
+
+    case COLOR_BASE16:
+    case COLOR_BASE256:
+        xassert(cell->attrs.fg < ALEN(term->colors.table));
+        _fg = term->colors.table[cell->attrs.fg];
+        break;
+
+    case COLOR_DEFAULT:
+        _fg = term->reverse ? term->colors.bg : term->colors.fg;
+        break;
+    }
+
+    switch (cell->attrs.bg_src) {
+    case COLOR_RGB:
+        _bg = cell->attrs.bg;
+        break;
+
+    case COLOR_BASE16:
+    case COLOR_BASE256:
+        xassert(cell->attrs.bg < ALEN(term->colors.table));
+        _bg = term->colors.table[cell->attrs.bg];
+        break;
+
+    case COLOR_DEFAULT:
+        _bg = term->reverse ? term->colors.fg : term->colors.bg;
+        break;
+    }
+
+    if (unlikely(is_selected)) {
+        const uint32_t cell_fg = _fg;
+        const uint32_t cell_bg = _bg;
+
+        const bool custom_fg = term->colors.selection_fg >> 24 == 0;
+        const bool custom_bg = term->colors.selection_bg >> 24 == 0;
+        const bool custom_both = custom_fg && custom_bg;
+
+        if (custom_both) {
+            _fg = term->colors.selection_fg;
+            _bg = term->colors.selection_bg;
+        } else if (custom_bg) {
+            _bg = term->colors.selection_bg;
+            _fg = cell->attrs.reverse ? cell_bg : cell_fg;
+        } else if (custom_fg) {
+            _fg = term->colors.selection_fg;
+            _bg = cell->attrs.reverse ? cell_fg : cell_bg;
+        } else {
+            _bg = cell_fg;
+            _fg = cell_bg;
+        }
+
+        if (unlikely(_fg == _bg)) {
+            /* Invert bg when selected/highlighted text has same fg/bg */
+            _bg = ~_bg;
+            alpha = 0xffff;
+        }
 
-    if (is_selected && term->colors.use_custom_selection) {
-        _fg = term->colors.selection_fg;
-        _bg = term->colors.selection_bg;
     } else {
-        /* Use cell specific color, if set, otherwise the default colors (possible reversed) */
-        switch (cell->attrs.fg_src) {
-        case COLOR_RGB:
-            _fg = cell->attrs.fg;
-            break;
-
-        case COLOR_BASE16:
-        case COLOR_BASE256:
-            xassert(cell->attrs.fg < ALEN(term->colors.table));
-            _fg = term->colors.table[cell->attrs.fg];
-            break;
-
-        case COLOR_DEFAULT:
-            _fg = term->reverse ? term->colors.bg : term->colors.fg;
-            break;
-        }
-
-        switch (cell->attrs.bg_src) {
-        case COLOR_RGB:
-            _bg = cell->attrs.bg;
-            break;
-
-        case COLOR_BASE16:
-        case COLOR_BASE256:
-            xassert(cell->attrs.bg < ALEN(term->colors.table));
-            _bg = term->colors.table[cell->attrs.bg];
-            break;
-
-        case COLOR_DEFAULT:
-            _bg = term->reverse ? term->colors.fg : term->colors.bg;
-            break;
-        }
-
-        if (cell->attrs.reverse ^ is_selected) {
+        if (unlikely(cell->attrs.reverse)) {
             uint32_t swap = _fg;
             _fg = _bg;
             _bg = swap;
         }
 
         else if (!term->window->is_fullscreen && term->colors.alpha != 0xffff) {
-            switch (term->conf->colors.alpha_mode) {
+            switch (term->conf->colors_dark.alpha_mode) {
             case ALPHA_MODE_DEFAULT: {
                 if (cell->attrs.bg_src == COLOR_DEFAULT) {
                     alpha = term->colors.alpha;
@@ -806,12 +837,6 @@ render_cell(struct terminal *term, pixman_image_t *pix,
         }
     }
 
-    if (unlikely(is_selected && _fg == _bg)) {
-        /* Invert bg when selected/highlighted text has same fg/bg */
-        _bg = ~_bg;
-        alpha = 0xffff;
-    }
-
     if (cell->attrs.dim)
         _fg = color_dim(term, _fg);
     if (term->conf->bold_in_bright.enabled && cell->attrs.bold)
@@ -820,7 +845,7 @@ render_cell(struct terminal *term, pixman_image_t *pix,
     if (cell->attrs.blink && term->blink.state == BLINK_OFF)
         _fg = color_blend_towards(_fg, 0x00000000, term->conf->dim.amount);
 
-    const bool gamma_correct = render_do_linear_blending(term);
+    const bool gamma_correct = wayl_do_linear_blending(term->wl, term->conf);
     pixman_color_t fg = color_hex_to_pixman(_fg, gamma_correct);
     pixman_color_t bg = color_hex_to_pixman_with_alpha(_bg, alpha, gamma_correct);
 
@@ -1150,8 +1175,8 @@ render_cell(struct terminal *term, pixman_image_t *pix,
 
     if (unlikely(cell->attrs.url)) {
         pixman_color_t url_color = color_hex_to_pixman(
-            term->conf->colors.use_custom.url
-            ? term->conf->colors.url
+            term->conf->colors_dark.use_custom.url
+            ? term->conf->colors_dark.url
             : term->colors.table[3],
             gamma_correct);
         draw_underline(term, pix, font, &url_color, x, y, cell_cols);
@@ -1180,7 +1205,8 @@ static void
 render_urgency(struct terminal *term, struct buffer *buf)
 {
     uint32_t red = term->colors.table[1];
-    pixman_color_t bg = color_hex_to_pixman(red, render_do_linear_blending(term));
+    pixman_color_t bg = color_hex_to_pixman(
+        red, wayl_do_linear_blending(term->wl, term->conf));
 
     int width = min(min(term->margins.left, term->margins.right),
                     min(term->margins.top, term->margins.bottom));
@@ -1211,7 +1237,7 @@ render_margin(struct terminal *term, struct buffer *buf,
     const int bmargin = term->height - term->margins.bottom;
     const int line_count = end_line - start_line;
 
-    const bool gamma_correct = render_do_linear_blending(term);
+    const bool gamma_correct = wayl_do_linear_blending(term->wl, term->conf);
     const uint32_t _bg = !term->reverse ? term->colors.bg : term->colors.fg;
     uint16_t alpha = term->colors.alpha;
 
@@ -1699,7 +1725,7 @@ render_ime_preedit_for_seat(struct terminal *term, struct seat *seat,
     if (unlikely(term->is_searching))
         return;
 
-    const bool gamma_correct = render_do_linear_blending(term);
+    const bool gamma_correct = wayl_do_linear_blending(term->wl, term->conf);
 
     /* Adjust cursor position to viewport */
     struct coord cursor;
@@ -1951,10 +1977,6 @@ render_overlay(struct terminal *term)
             wl_surface_commit(overlay->surface.surf);
             term->render.last_overlay_style = OVERLAY_NONE;
             term->render.last_overlay_buf = NULL;
-
-            /* Work around Sway bug - unmapping a sub-surface does not
-             * damage the underlying surface */
-            quirk_sway_subsurface_unmap(term);
         }
         return;
     }
@@ -1969,8 +1991,9 @@ render_overlay(struct terminal *term)
 
     case OVERLAY_FLASH:
         color = color_hex_to_pixman_with_alpha(
-                term->conf->colors.flash,
-                term->conf->colors.flash_alpha, render_do_linear_blending(term));
+                term->conf->colors_dark.flash,
+                term->conf->colors_dark.flash_alpha,
+                wayl_do_linear_blending(term->wl, term->conf));
         break;
 
     case OVERLAY_NONE:
@@ -1989,7 +2012,7 @@ render_overlay(struct terminal *term)
     }
 
     struct buffer *buf = shm_get_buffer(
-        term->render.chains.overlay, term->width, term->height, true);
+        term->render.chains.overlay, term->width, term->height);
     pixman_image_set_clip_region32(buf->pix[0], NULL);
 
     /* Bounding rectangle of damaged areas - for wl_surface_damage_buffer() */
@@ -2208,6 +2231,56 @@ render_worker_thread(void *_ctx)
 
             case -2:
                 return 0;
+
+            case -3: {
+                if (term->conf->tweak.render_timer != RENDER_TIMER_NONE)
+                    clock_gettime(CLOCK_MONOTONIC, &term->render.workers.preapplied_damage.start);
+
+                mtx_lock(&term->render.workers.preapplied_damage.lock);
+                buf = term->render.workers.preapplied_damage.buf;
+                xassert(buf != NULL);
+
+                if (likely(term->render.last_buf != NULL)) {
+                    mtx_unlock(&term->render.workers.preapplied_damage.lock);
+
+                    pixman_region32_t dmg;
+                    pixman_region32_init(&dmg);
+
+                    if (buf->age == 0)
+                        ; /* No need to do anything */
+                    else if (buf->age == 1)
+                        pixman_region32_copy(&dmg,
+                                             &term->render.last_buf->dirty[0]);
+                    else
+                        pixman_region32_init_rect(&dmg, 0, 0, buf->width,
+                                                  buf->height);
+
+                    pixman_image_set_clip_region32(buf->pix[my_id], &dmg);
+                    pixman_image_composite32(PIXMAN_OP_SRC,
+                                             term->render.last_buf->pix[my_id],
+                                             NULL, buf->pix[my_id], 0, 0, 0, 0, 0,
+                                             0, buf->width, buf->height);
+
+                    pixman_region32_fini(&dmg);
+
+                    buf->age = 0;
+                    shm_unref(term->render.last_buf);
+                    shm_addref(buf);
+                    term->render.last_buf = buf;
+
+                    mtx_lock(&term->render.workers.preapplied_damage.lock);
+                }
+
+                term->render.workers.preapplied_damage.buf = NULL;
+                cnd_signal(&term->render.workers.preapplied_damage.cond);
+                mtx_unlock(&term->render.workers.preapplied_damage.lock);
+
+                if (term->conf->tweak.render_timer != RENDER_TIMER_NONE)
+                    clock_gettime(CLOCK_MONOTONIC, &term->render.workers.preapplied_damage.stop);
+
+                frame_done = true;
+                break;
+            }
             }
         }
     };
@@ -2215,6 +2288,22 @@ render_worker_thread(void *_ctx)
     return -1;
 }
 
+void
+render_wait_for_preapply_damage(struct terminal *term)
+{
+    if (!term->render.preapply_last_frame_damage)
+        return;
+    if (term->render.workers.preapplied_damage.buf == NULL)
+        return;
+
+    mtx_lock(&term->render.workers.preapplied_damage.lock);
+    while (term->render.workers.preapplied_damage.buf != NULL) {
+        cnd_wait(&term->render.workers.preapplied_damage.cond,
+                 &term->render.workers.preapplied_damage.lock);
+    }
+    mtx_unlock(&term->render.workers.preapplied_damage.lock);
+}
+
 struct csd_data
 get_csd_data(const struct terminal *term, enum csd_surface surf_idx)
 {
@@ -2234,16 +2323,21 @@ get_csd_data(const struct terminal *term, enum csd_surface surf_idx)
     const int button_width = title_visible
         ? roundf(term->conf->csd.button_width * scale) : 0;
 
-    const int button_close_width = term->width >= 1 * button_width
-        ? button_width : 0;
+    int remaining_width = term->width;
 
-    const int button_maximize_width =
-        term->width >= 2 * button_width && term->window->wm_capabilities.maximize
-            ? button_width : 0;
+    const int button_close_width = remaining_width >= button_width ? button_width : 0;
+    remaining_width -= button_close_width;
+    const int button_close_start = remaining_width;
 
-    const int button_minimize_width =
-        term->width >= 3 * button_width && term->window->wm_capabilities.minimize
-            ? button_width : 0;
+    const int button_maximize_width = remaining_width >= button_width &&
+        term->window->wm_capabilities.maximize ? button_width : 0;
+    remaining_width -= button_maximize_width;
+    const int button_maximize_start = remaining_width;
+
+    const int button_minimize_width = remaining_width >= button_width &&
+        term->window->wm_capabilities.minimize ? button_width : 0;
+    remaining_width -= button_minimize_width;
+    const int button_minimize_start = remaining_width;
 
     /*
      * With fractional scaling, we must ensure the offset, when
@@ -2268,9 +2362,9 @@ get_csd_data(const struct terminal *term, enum csd_surface surf_idx)
     case CSD_SURF_BOTTOM: return (struct csd_data){-border_width,  term->height, top_bottom_width,      border_width};
 
     /* Positioned relative to CSD_SURF_TITLE */
-    case CSD_SURF_MINIMIZE: return (struct csd_data){term->width - 3 * button_width, 0, button_minimize_width, title_height};
-    case CSD_SURF_MAXIMIZE: return (struct csd_data){term->width - 2 * button_width, 0, button_maximize_width, title_height};
-    case CSD_SURF_CLOSE:    return (struct csd_data){term->width - 1 * button_width, 0, button_close_width,    title_height};
+    case CSD_SURF_MINIMIZE: return (struct csd_data){button_minimize_start, 0, button_minimize_width, title_height};
+    case CSD_SURF_MAXIMIZE: return (struct csd_data){button_maximize_start, 0, button_maximize_width, title_height};
+    case CSD_SURF_CLOSE:    return (struct csd_data){   button_close_start, 0,    button_close_width, title_height};
 
     case CSD_SURF_COUNT:
         break;
@@ -2312,7 +2406,7 @@ render_osd(struct terminal *term, const struct wayl_sub_surface *sub_surf,
     pixman_image_set_clip_region32(buf->pix[0], &clip);
     pixman_region32_fini(&clip);
 
-    const bool gamma_correct = render_do_linear_blending(term);
+    const bool gamma_correct = wayl_do_linear_blending(term->wl, term->conf);
     uint16_t alpha = _bg >> 24 | (_bg >> 24 << 8);
     pixman_color_t bg = color_hex_to_pixman_with_alpha(_bg, alpha, gamma_correct);
     pixman_image_fill_rectangles(
@@ -2416,10 +2510,10 @@ render_csd_title(struct terminal *term, const struct csd_data *info,
 
     uint32_t bg = term->conf->csd.color.title_set
         ? term->conf->csd.color.title
-        : 0xffu << 24 | term->conf->colors.fg;
+        : 0xffu << 24 | term->conf->colors_dark.fg;
     uint32_t fg = term->conf->csd.color.buttons_set
         ? term->conf->csd.color.buttons
-        : term->conf->colors.bg;
+        : term->conf->colors_dark.bg;
 
     if (!term->visual_focus) {
         bg = color_dim(term, bg);
@@ -2453,7 +2547,7 @@ render_csd_border(struct terminal *term, enum csd_surface surf_idx,
     if (info->width == 0 || info->height == 0)
         return;
 
-    const bool gamma_correct = render_do_linear_blending(term);
+    const bool gamma_correct = wayl_do_linear_blending(term->wl, term->conf);
 
     {
         /* Fully transparent - no need to do a color space transform */
@@ -2513,7 +2607,7 @@ render_csd_border(struct terminal *term, enum csd_surface surf_idx,
         uint32_t _color =
             conf->csd.color.border_set ? conf->csd.color.border :
             conf->csd.color.title_set ? conf->csd.color.title :
-            0xffu << 24 | term->conf->colors.fg;
+            0xffu << 24 | term->conf->colors_dark.fg;
         if (!term->visual_focus)
             _color = color_dim(term, _color);
 
@@ -2533,7 +2627,7 @@ static pixman_color_t
 get_csd_button_fg_color(const struct terminal *term)
 {
     const struct config *conf = term->conf;
-    uint32_t _color = conf->colors.bg;
+    uint32_t _color = conf->colors_dark.bg;
     uint16_t alpha = 0xffff;
 
     if (conf->csd.color.buttons_set) {
@@ -2542,7 +2636,7 @@ get_csd_button_fg_color(const struct terminal *term)
     }
 
     return color_hex_to_pixman_with_alpha(
-        _color, alpha, render_do_linear_blending(term));
+        _color, alpha, wayl_do_linear_blending(term->wl, term->conf));
 }
 
 static void
@@ -2778,7 +2872,7 @@ render_csd_button(struct terminal *term, enum csd_surface surf_idx,
 
     switch (surf_idx) {
     case CSD_SURF_MINIMIZE:
-        _color = term->conf->colors.table[4];  /* blue */
+        _color = term->conf->colors_dark.table[4];  /* blue */
         is_set = term->conf->csd.color.minimize_set;
         conf_color = &term->conf->csd.color.minimize;
         is_active = term->active_surface == TERM_SURF_BUTTON_MINIMIZE &&
@@ -2786,7 +2880,7 @@ render_csd_button(struct terminal *term, enum csd_surface surf_idx,
         break;
 
     case CSD_SURF_MAXIMIZE:
-        _color = term->conf->colors.table[2];  /* green */
+        _color = term->conf->colors_dark.table[2];  /* green */
         is_set = term->conf->csd.color.maximize_set;
         conf_color = &term->conf->csd.color.maximize;
         is_active = term->active_surface == TERM_SURF_BUTTON_MAXIMIZE &&
@@ -2794,7 +2888,7 @@ render_csd_button(struct terminal *term, enum csd_surface surf_idx,
         break;
 
     case CSD_SURF_CLOSE:
-        _color = term->conf->colors.table[1];  /* red */
+        _color = term->conf->colors_dark.table[1];  /* red */
         is_set = term->conf->csd.color.close_set;
         conf_color = &term->conf->csd.color.quit;
         is_active = term->active_surface == TERM_SURF_BUTTON_CLOSE &&
@@ -2819,7 +2913,7 @@ render_csd_button(struct terminal *term, enum csd_surface surf_idx,
     if (!term->visual_focus)
         _color = color_dim(term, _color);
 
-    const bool gamma_correct = render_do_linear_blending(term);
+    const bool gamma_correct = wayl_do_linear_blending(term->wl, term->conf);
     pixman_color_t color = color_hex_to_pixman_with_alpha(_color, alpha, gamma_correct);
     render_csd_part(term, surf->surf, buf, info->width, info->height, &color);
 
@@ -2876,7 +2970,7 @@ render_csd(struct terminal *term)
     }
 
     struct buffer *bufs[CSD_SURF_COUNT];
-    shm_get_many(term->render.chains.csd, CSD_SURF_COUNT, widths, heights, bufs, true);
+    shm_get_many(term->render.chains.csd, CSD_SURF_COUNT, widths, heights, bufs);
 
     for (size_t i = CSD_SURF_LEFT; i <= CSD_SURF_BOTTOM; i++)
         render_csd_border(term, i, &infos[i], bufs[i]);
@@ -2894,13 +2988,8 @@ render_scrollback_position(struct terminal *term)
     struct wl_window *win = term->window;
 
     if (term->grid->view == term->grid->offset) {
-        if (win->scrollback_indicator.surface.surf != NULL) {
+        if (win->scrollback_indicator.surface.surf != NULL)
             wayl_win_subsurface_destroy(&win->scrollback_indicator);
-
-            /* Work around Sway bug - unmapping a sub-surface does not damage
-             * the underlying surface */
-            quirk_sway_subsurface_unmap(term);
-        }
         return;
     }
 
@@ -3021,16 +3110,16 @@ render_scrollback_position(struct terminal *term)
     }
 
     struct buffer_chain *chain = term->render.chains.scrollback_indicator;
-    struct buffer *buf = shm_get_buffer(chain, width, height, false);
+    struct buffer *buf = shm_get_buffer(chain, width, height);
 
     wl_subsurface_set_position(
         win->scrollback_indicator.sub, roundf(x / scale), roundf(y / scale));
 
     uint32_t fg = term->colors.table[0];
     uint32_t bg = term->colors.table[8 + 4];
-    if (term->conf->colors.use_custom.scrollback_indicator) {
-        fg = term->conf->colors.scrollback_indicator.fg;
-        bg = term->conf->colors.scrollback_indicator.bg;
+    if (term->conf->colors_dark.use_custom.scrollback_indicator) {
+        fg = term->conf->colors_dark.scrollback_indicator.fg;
+        bg = term->conf->colors_dark.scrollback_indicator.bg;
     }
 
     render_osd(
@@ -3064,7 +3153,7 @@ render_render_timer(struct terminal *term, struct timespec render_time)
     height = roundf(scale * ceilf(height / scale));
 
     struct buffer_chain *chain = term->render.chains.render_timer;
-    struct buffer *buf = shm_get_buffer(chain, width, height, false);
+    struct buffer *buf = shm_get_buffer(chain, width, height);
 
     wl_subsurface_set_position(
         win->render_timer.sub,
@@ -3097,14 +3186,6 @@ force_full_repaint(struct terminal *term, struct buffer *buf)
 static void
 reapply_old_damage(struct terminal *term, struct buffer *new, struct buffer *old)
 {
-    static int counter = 0;
-    static bool have_warned = false;
-    if (!have_warned && ++counter > 5) {
-        LOG_WARN("compositor is not releasing buffers immediately; "
-                 "expect lower rendering performance");
-        have_warned = true;
-    }
-
     if (new->age > 1) {
         memcpy(new->data, old->data, new->height * new->stride);
         return;
@@ -3235,7 +3316,18 @@ grid_render(struct terminal *term)
     if (term->shutdown.in_progress)
         return;
 
-    struct timespec start_time, start_double_buffering = {0}, stop_double_buffering = {0};
+    struct timespec start_time;
+    struct timespec start_wait_preapply = {0}, stop_wait_preapply = {0};
+    struct timespec start_double_buffering = {0}, stop_double_buffering = {0};
+
+    /* Might be a thread doing pre-applied damage */
+    if (unlikely(term->render.preapply_last_frame_damage &&
+                 term->render.workers.preapplied_damage.buf != NULL))
+    {
+        clock_gettime(CLOCK_MONOTONIC, &start_wait_preapply);
+        render_wait_for_preapply_damage(term);
+        clock_gettime(CLOCK_MONOTONIC, &stop_wait_preapply);
+    }
 
     if (term->conf->tweak.render_timer != RENDER_TIMER_NONE)
         clock_gettime(CLOCK_MONOTONIC, &start_time);
@@ -3244,15 +3336,14 @@ grid_render(struct terminal *term)
     xassert(term->height > 0);
 
     struct buffer_chain *chain = term->render.chains.grid;
-    bool use_alpha = !term->window->is_fullscreen &&
-                     term->colors.alpha != 0xffff;
-    struct buffer *buf = shm_get_buffer(
-        chain, term->width, term->height, use_alpha);
+    struct buffer *buf = shm_get_buffer(chain, term->width, term->height);
 
     /* Dirty old and current cursor cell, to ensure they're repainted */
     dirty_old_cursor(term);
     dirty_cursor(term);
 
+    LOG_DBG("buffer age: %u (%p)", buf->age, (void *)buf);
+
     if (term->render.last_buf == NULL ||
         term->render.last_buf->width != buf->width ||
         term->render.last_buf->height != buf->height ||
@@ -3269,9 +3360,27 @@ grid_render(struct terminal *term)
         xassert(term->render.last_buf->width == buf->width);
         xassert(term->render.last_buf->height == buf->height);
 
+        if (++term->render.frames_since_last_immediate_release > 10) {
+            static bool have_warned = false;
+
+            if (!term->render.preapply_last_frame_damage &&
+                term->conf->tweak.preapply_damage &&
+                term->render.workers.count > 0)
+            {
+                LOG_INFO("enabling pre-applied frame damage");
+                term->render.preapply_last_frame_damage = true;
+            } else if (!have_warned && !term->render.preapply_last_frame_damage) {
+                LOG_WARN("compositor is not releasing buffers immediately; "
+                         "expect lower rendering performance");
+                have_warned = true;
+            }
+        }
+
         clock_gettime(CLOCK_MONOTONIC, &start_double_buffering);
         reapply_old_damage(term, buf, term->render.last_buf);
         clock_gettime(CLOCK_MONOTONIC, &stop_double_buffering);
+    } else if (!term->render.preapply_last_frame_damage) {
+        term->render.frames_since_last_immediate_release = 0;
     }
 
     if (term->render.last_buf != NULL) {
@@ -3499,27 +3608,40 @@ grid_render(struct terminal *term)
         struct timespec end_time;
         clock_gettime(CLOCK_MONOTONIC, &end_time);
 
+        struct timespec wait_time;
+        timespec_sub(&stop_wait_preapply, &start_wait_preapply, &wait_time);
+
         struct timespec render_time;
         timespec_sub(&end_time, &start_time, &render_time);
 
         struct timespec double_buffering_time;
         timespec_sub(&stop_double_buffering, &start_double_buffering, &double_buffering_time);
 
+        struct timespec preapply_damage;
+        timespec_sub(&term->render.workers.preapplied_damage.stop,
+                     &term->render.workers.preapplied_damage.start,
+                     &preapply_damage);
+
         struct timespec total_render_time;
         timespec_add(&render_time, &double_buffering_time, &total_render_time);
+        timespec_add(&wait_time, &total_render_time, &total_render_time);
 
         switch (term->conf->tweak.render_timer) {
         case RENDER_TIMER_LOG:
         case RENDER_TIMER_BOTH:
             LOG_INFO(
                 "frame rendered in %lds %9ldns "
-                "(%lds %9ldns rendering, %lds %9ldns double buffering)",
+                "(%lds %9ldns wait, %lds %9ldns rendering, %lds %9ldns double buffering) not included: %lds %ldns pre-apply damage",
                 (long)total_render_time.tv_sec,
                 total_render_time.tv_nsec,
+                (long)wait_time.tv_sec,
+                wait_time.tv_nsec,
                 (long)render_time.tv_sec,
                 render_time.tv_nsec,
                 (long)double_buffering_time.tv_sec,
-                double_buffering_time.tv_nsec);
+                double_buffering_time.tv_nsec,
+                (long)preapply_damage.tv_sec,
+                preapply_damage.tv_nsec);
             break;
 
         case RENDER_TIMER_OSD:
@@ -3662,7 +3784,7 @@ render_search_box(struct terminal *term)
     size_t glyph_offset = term->render.search_glyph_offset;
 
     struct buffer_chain *chain = term->render.chains.search;
-    struct buffer *buf = shm_get_buffer(chain, width, height, true);
+    struct buffer *buf = shm_get_buffer(chain, width, height);
 
     pixman_region32_t clip;
     pixman_region32_init_rect(&clip, 0, 0, width, height);
@@ -3674,18 +3796,18 @@ render_search_box(struct terminal *term)
 
     const bool is_match = term->search.match_len == text_len;
     const bool custom_colors = is_match
-        ? term->conf->colors.use_custom.search_box_match
-        : term->conf->colors.use_custom.search_box_no_match;
+        ? term->conf->colors_dark.use_custom.search_box_match
+        : term->conf->colors_dark.use_custom.search_box_no_match;
 
     /* Background - yellow on empty/match, red on mismatch (default) */
-    const bool gamma_correct = render_do_linear_blending(term);
+    const bool gamma_correct = wayl_do_linear_blending(term->wl, term->conf);
     const pixman_color_t color = color_hex_to_pixman(
         is_match
         ? (custom_colors
-           ? term->conf->colors.search_box.match.bg
+           ? term->conf->colors_dark.search_box.match.bg
            : term->colors.table[3])
         : (custom_colors
-           ? term->conf->colors.search_box.no_match.bg
+           ? term->conf->colors_dark.search_box.no_match.bg
            : term->colors.table[1]),
         gamma_correct);
 
@@ -3707,8 +3829,8 @@ render_search_box(struct terminal *term)
     pixman_color_t fg = color_hex_to_pixman(
         custom_colors
         ? (is_match
-           ? term->conf->colors.search_box.match.fg
-           : term->conf->colors.search_box.no_match.fg)
+           ? term->conf->colors_dark.search_box.match.fg
+           : term->conf->colors_dark.search_box.no_match.fg)
         : term->colors.table[0],
         gamma_correct);
 
@@ -4127,13 +4249,13 @@ render_urls(struct terminal *term)
 
     struct buffer_chain *chain = term->render.chains.url;
     struct buffer *bufs[render_count];
-    shm_get_many(chain, render_count, widths, heights, bufs, false);
+    shm_get_many(chain, render_count, widths, heights, bufs);
 
-    uint32_t fg = term->conf->colors.use_custom.jump_label
-        ? term->conf->colors.jump_label.fg
+    uint32_t fg = term->conf->colors_dark.use_custom.jump_label
+        ? term->conf->colors_dark.jump_label.fg
         : term->colors.table[0];
-    uint32_t bg = term->conf->colors.use_custom.jump_label
-        ? term->conf->colors.jump_label.bg
+    uint32_t bg = term->conf->colors_dark.use_custom.jump_label
+        ? term->conf->colors_dark.jump_label.bg
         : term->colors.table[3];
 
     for (size_t i = 0; i < render_count; i++) {
@@ -4279,6 +4401,7 @@ delayed_reflow_of_normal_grid(struct terminal *term)
     term->interactive_resizing.old_hide_cursor = false;
 
     /* Invalidate render pointers */
+    render_wait_for_preapply_damage(term);
     shm_unref(term->render.last_buf);
     term->render.last_buf = NULL;
     term->render.last_cursor.row = NULL;
@@ -4571,9 +4694,12 @@ render_resize(struct terminal *term, int width, int height, uint8_t opts)
     const int total_x_pad = term->width - grid_width;
     const int total_y_pad = term->height - grid_height;
 
-    const bool centered_padding = term->conf->center
-                                  || term->window->is_fullscreen
-                                  || term->window->is_maximized;
+    const enum center_when center = term->conf->center_when;
+    const bool centered_padding =
+        center == CENTER_ALWAYS ||
+        (center == CENTER_MAXIMIZED_AND_FULLSCREEN &&
+         (term->window->is_fullscreen || term->window->is_maximized)) ||
+        (center == CENTER_FULLSCREEN && term->window->is_fullscreen);
 
     if (centered_padding && !term->window->is_resizing) {
         term->margins.left = total_x_pad / 2;
@@ -4850,6 +4976,7 @@ damage_view:
     tll_free(term->normal.scroll_damage);
     tll_free(term->alt.scroll_damage);
 
+    render_wait_for_preapply_damage(term);
     shm_unref(term->render.last_buf);
     term->render.last_buf = NULL;
     term_damage_view(term);
@@ -4904,8 +5031,9 @@ render_xcursor_update(struct seat *seat)
 
         const enum wp_cursor_shape_device_v1_shape custom_shape =
             (shape == CURSOR_SHAPE_CUSTOM && xcursor != NULL
-             ? cursor_string_to_server_shape(xcursor)
-             : 0);
+                ? cursor_string_to_server_shape(
+                    xcursor, seat->wayl->shape_manager_version)
+                : 0);
 
         if (shape != CURSOR_SHAPE_CUSTOM || custom_shape != 0) {
             xassert(custom_shape == 0 || shape == CURSOR_SHAPE_CUSTOM);
@@ -5248,9 +5376,76 @@ render_xcursor_set(struct seat *seat, struct terminal *term,
     return true;
 }
 
-bool
-render_do_linear_blending(const struct terminal *term)
+void
+render_buffer_release_callback(struct buffer *buf, void *data)
 {
-    return term->conf->gamma_correct != GAMMA_CORRECT_DISABLED &&
-           term->wl->color_management.img_description != NULL;
+    /*
+     * Called from shm.c when a buffer is released
+     *
+     * We use it to pre-apply last-frame's damage to it, when we're
+     * forced to double buffer (compositor doesn't release buffers
+     * immediately).
+     *
+     * The timeline is thus:
+     *   1. We render and push a new frame
+     *   2. Some (hopefully short) time after that, the compositor releases the previous buffer
+     *   3. We're called, and kick off the thread that copies the changes from (1) to the just freed buffer
+     *   4. Time passes....
+     *   5. The compositor calls our frame callback, signalling to us that it's time to start rendering the next frame
+     *   6. Hopefully, our thread is already done with copying the changes, otherwise we stall, waiting for it
+     *   7. We render the frame as if the compositor does immediate releases.
+     *
+     * What's the gain? Reduced latency, by applying the previous
+     * frame's damage as soon as possible, we shorten the time it
+     * takes to render the frame after the frame callback.
+     *
+     * This means the compositor can, in theory, push the frame
+     * callback closer to the vblank deadline, and thus reduce input
+     * latency. Not all compositors (most, in fact?) don't adapt like
+     * this, unfortunately. But some allows the user to manually
+     * configure the deadline.
+     */
+    struct terminal *term = data;
+
+    if (likely(buf->age != 1))
+        return;
+
+    if (likely(!term->render.preapply_last_frame_damage))
+        return;
+
+    if (term->render.last_buf == NULL)
+        return;
+
+    if (term->render.last_buf->age != 0)
+        return;
+
+    if (buf->width != term->render.last_buf->width)
+        return;
+
+    if (buf->height != term->render.last_buf->height)
+        return;
+
+    xassert(term->render.workers.count > 0);
+    xassert(term->render.last_buf != NULL);
+
+    xassert(term->render.last_buf->age == 0);
+    xassert(term->render.last_buf != buf);
+
+    mtx_lock(&term->render.workers.preapplied_damage.lock);
+    if (term->render.workers.preapplied_damage.buf != NULL) {
+        mtx_unlock(&term->render.workers.preapplied_damage.lock);
+        return;
+    }
+
+    xassert(term->render.workers.preapplied_damage.buf == NULL);
+    term->render.workers.preapplied_damage.buf = buf;
+    term->render.workers.preapplied_damage.start = (struct timespec){0};
+    term->render.workers.preapplied_damage.stop = (struct timespec){0};
+    mtx_unlock(&term->render.workers.preapplied_damage.lock);
+
+    mtx_lock(&term->render.workers.lock);
+    sem_post(&term->render.workers.start);
+    xassert(tll_length(term->render.workers.queue) == 0);
+    tll_push_back(term->render.workers.queue, -3);
+    mtx_unlock(&term->render.workers.lock);
 }

render.h

@@ -48,4 +48,5 @@ struct csd_data {
 
 struct csd_data get_csd_data(const struct terminal *term, enum csd_surface surf_idx);
 
-bool render_do_linear_blending(const struct terminal *term);
+void render_buffer_release_callback(struct buffer *buf, void *data);
+void render_wait_for_preapply_damage(struct terminal *term);

scripts/benchmark.py

@@ -11,7 +11,7 @@ import termios
 from datetime import datetime
 
 
-def main():
+def main() -> None:
     parser = argparse.ArgumentParser()
     parser.add_argument('files', type=argparse.FileType('rb'), nargs='+')
     parser.add_argument('--iterations', type=int, default=20)
@@ -24,12 +24,12 @@ def main():
                     termios.TIOCGWINSZ,
                     struct.pack('HHHH', 0, 0, 0, 0)))
 
-    times = {name: [] for name in [f.name for f in args.files]}
+    times: dict[str, list[float]] = {name: [] for name in [f.name for f in args.files]}
 
     for f in args.files:
         bench_bytes = f.read()
 
-        for i in range(args.iterations):
+        for _ in range(args.iterations):
             start = datetime.now()
             sys.stdout.buffer.write(bench_bytes)
             stop = datetime.now()
@@ -48,4 +48,4 @@ def main():
 
 
 if __name__ == '__main__':
-    sys.exit(main())
+    main()

scripts/generate-alt-random-writes.py

@@ -8,6 +8,8 @@ import struct
 import sys
 import termios
 
+from typing import Any
+
 
 class ColorVariant(enum.IntEnum):
     NONE = enum.auto()
@@ -17,7 +19,7 @@ class ColorVariant(enum.IntEnum):
     RGB = enum.auto()
 
 
-def main():
+def main() -> None:
     parser = argparse.ArgumentParser()
     parser.add_argument(
         'out', type=argparse.FileType(mode='w'), nargs='?', help='name of output file')
@@ -38,10 +40,16 @@ def main():
     opts = parser.parse_args()
     out = opts.out if opts.out is not None else sys.stdout
 
+    lines: int | None = None
+    cols: int | None = None
+    width: int | None = None
+    height: int | None = None
+
     if opts.rows is None or opts.cols is None:
         try:
-            def dummy(*args):
+            def dummy(*args: Any) -> None:
                 """Need a handler installed for sigwait() to trigger."""
+                _ = args
                 pass
             signal.signal(signal.SIGWINCH, dummy)
 
@@ -53,6 +61,9 @@ def main():
                                     termios.TIOCGWINSZ,
                                     struct.pack('HHHH', 0, 0, 0, 0)))
 
+                assert width is not None
+                assert height is not None
+
                 if width > 0 and height > 0:
                     break
 
@@ -71,9 +82,11 @@ def main():
 
     if opts.rows is not None:
         lines = opts.rows
+        assert lines is not None
         height = 15 * lines  # PGO helper binary hardcodes cell height to 15px
     if opts.cols is not None:
         cols = opts.cols
+        assert cols is not None
         width = 8 * cols     # PGO help binary hardcodes cell width to 8px
 
     if lines is None or cols is None or height is None or width is None:
@@ -190,8 +203,8 @@ def main():
         # The sixel 'alphabet'
         sixels = '?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~'
 
-        last_pos = None
-        last_size = None
+        last_pos: tuple[int, int] | None = None
+        last_size: tuple[int, int] = 0, 0
 
         for _ in range(20):
             if last_pos is not None and random.randrange(2):
@@ -254,4 +267,4 @@ def main():
 
 
 if __name__ == '__main__':
-    sys.exit(main())
+    main()

scripts/generate-builtin-terminfo.py

@@ -1,14 +1,12 @@
 #!/usr/bin/env python3
 
 import argparse
+import os
 import re
-import sys
-
-from typing import Dict, Union
 
 
 class Capability:
-    def __init__(self, name: str, value: Union[bool, int, str]):
+    def __init__(self, name: str, value: bool | int | str):
         self._name = name
         self._value = value
 
@@ -17,25 +15,37 @@ class Capability:
         return self._name
 
     @property
-    def value(self) -> Union[bool, int, str]:
+    def value(self) -> bool | int | str:
         return self._value
 
-    def __lt__(self, other):
+    def __lt__(self, other: object) -> bool:
+        if not isinstance(other, Capability):
+            return NotImplemented
         return self._name < other._name
 
-    def __le__(self, other):
+    def __le__(self, other: object) -> bool:
+        if not isinstance(other, Capability):
+            return NotImplemented
         return self._name <= other._name
 
-    def __eq__(self, other):
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, Capability):
+            return NotImplemented
         return self._name == other._name
 
-    def __ne__(self, other):
-        return self._name != other._name
+    def __ne__(self, other: object) -> bool:
+        if not isinstance(other, Capability):
+            return NotImplemented
+        return bool(self._name != other._name)
 
-    def __gt__(self, other):
-        return self._name > other._name
+    def __gt__(self, other: object) -> bool:
+        if not isinstance(other, Capability):
+            return NotImplemented
+        return bool(self._name > other._name)
 
-    def __ge__(self, other):
+    def __ge__(self, other: object) -> bool:
+        if not isinstance(other, Capability):
+            return NotImplemented
         return self._name >= other._name
 
 
@@ -53,7 +63,7 @@ class StringCapability(Capability):
         # see terminfo(5) for valid escape sequences
 
         # Control characters
-        def translate_ctrl_chr(m):
+        def translate_ctrl_chr(m: re.Match[str]) -> str:
             ctrl = m.group(1)
             if ctrl == '?':
                 return '\\x7f'
@@ -85,7 +95,7 @@ class Fragment:
     def __init__(self, name: str, description: str):
         self._name = name
         self._description = description
-        self._caps = {}
+        self._caps = dict[str, Capability]()
 
     @property
     def name(self) -> str:
@@ -96,18 +106,18 @@ class Fragment:
         return self._description
 
     @property
-    def caps(self) -> Dict[str, Capability]:
+    def caps(self) -> dict[str, Capability]:
         return self._caps
 
-    def add_capability(self, cap: Capability):
+    def add_capability(self, cap: Capability) -> None:
         assert cap.name not in self._caps
         self._caps[cap.name] = cap
 
-    def del_capability(self, name: str):
+    def del_capability(self, name: str) -> None:
         del self._caps[name]
 
 
-def main():
+def main() -> None:
     parser = argparse.ArgumentParser()
     parser.add_argument('source_entry_name')
     parser.add_argument('source', type=argparse.FileType('r'))
@@ -120,15 +130,15 @@ def main():
     source = opts.source
     target = opts.target
 
-    lines = []
-    for l in source.readlines():
-        l = l.strip()
-        if l.startswith('#'):
+    lines = list[str]()
+    for line in source.readlines():
+        line = line.strip()
+        if line.startswith('#'):
             continue
-        lines.append(l)
+        lines.append(line)
 
-    fragments = {}
-    cur_fragment = None
+    fragments = dict[str, Fragment]()
+    cur_fragment: Fragment | None = None
 
     for m in re.finditer(
             r'(?P<name>(?P<entry_name>[-+\w@]+)\|(?P<entry_desc>.+?),)|'
@@ -147,17 +157,20 @@ def main():
 
         elif m.group('bool_cap') is not None:
             name = m.group('bool_name')
+            assert cur_fragment is not None
             cur_fragment.add_capability(BoolCapability(name))
 
         elif m.group('int_cap') is not None:
             name = m.group('int_name')
-            value = int(m.group('int_val'), 0)
-            cur_fragment.add_capability(IntCapability(name, value))
+            int_value = int(m.group('int_val'), 0)
+            assert cur_fragment is not None
+            cur_fragment.add_capability(IntCapability(name, int_value))
 
         elif m.group('str_cap') is not None:
             name = m.group('str_name')
-            value = m.group('str_val')
-            cur_fragment.add_capability(StringCapability(name, value))
+            str_value = m.group('str_val')
+            assert cur_fragment is not None
+            cur_fragment.add_capability(StringCapability(name, str_value))
 
         else:
             assert False
@@ -166,6 +179,9 @@ def main():
     for frag in fragments.values():
         for cap in frag.caps.values():
             if cap.name == 'use':
+                assert isinstance(cap, StringCapability)
+                assert isinstance(cap.value, str)
+
                 use_frag = fragments[cap.value]
                 for use_cap in use_frag.caps.values():
                     frag.add_capability(use_cap)
@@ -185,8 +201,9 @@ def main():
     entry.add_capability(StringCapability('TN', target_entry_name))
     entry.add_capability(StringCapability('name', target_entry_name))
     entry.add_capability(IntCapability('RGB', 8))  # 8 bits per channel
+    entry.add_capability(StringCapability('query-os-name', os.uname().sysname))
 
-    terminfo_parts = []
+    terminfo_parts = list[str]()
     for cap in sorted(entry.caps.values()):
         name = cap.name
         value = str(cap.value)
@@ -210,4 +227,4 @@ def main():
 
 
 if __name__ == '__main__':
-    sys.exit(main())
+    main()

scripts/generate-emoji-variation-sequences.py

@@ -1,11 +1,10 @@
 #!/usr/bin/env python3
 
 import argparse
-import sys
 
 
 class Codepoint:
-    def __init__(self, start: int, end: None|int = None):
+    def __init__(self, start: int, end: None | int = None):
         self.start = start
         self.end = start if end is None else end
         self.vs15 = False
@@ -15,7 +14,7 @@ class Codepoint:
         return f'{self.start:x}-{self.end:x}, vs15={self.vs15}, vs16={self.vs16}'
 
 
-def main():
+def main() -> None:
     parser = argparse.ArgumentParser()
     parser.add_argument('input', type=argparse.FileType('r'))
     parser.add_argument('output', type=argparse.FileType('w'))
@@ -100,4 +99,4 @@ def main():
 
 
 if __name__ == '__main__':
-    sys.exit(main())
+    main()

scripts/srgb.py

@@ -2,51 +2,31 @@
 
 import argparse
 import math
-import sys
 
 
+# Note: we use a pure gamma 2.2 function, rather than the piece-wise
+# sRGB transfer function, since that is what all compositors do.
+
 def srgb_to_linear(f: float) -> float:
     assert(f >= 0 and f <= 1.0)
-
-    if f <= 0.04045:
-        return f / 12.92
-
-    return math.pow((f + 0.055) / 1.055, 2.4)
+    return math.pow(f, 2.2)
 
 
 def linear_to_srgb(f: float) -> float:
-    if f < 0.0031308:
-        return f * 12.92
-
-    return 1.055 * math.pow(f, 1 / 2.4) - 0.055
+    return math.pow(f, 1 / 2.2)
 
 
-
-def main():
+def main() -> None:
     parser = argparse.ArgumentParser()
     parser.add_argument('c_output', type=argparse.FileType('w'))
     parser.add_argument('h_output', type=argparse.FileType('w'))
     opts = parser.parse_args()
 
     linear_table: list[int] = []
-    srgb_table: list[int] = []
 
     for i in range(256):
         linear_table.append(int(srgb_to_linear(float(i) / 255) * 65535 + 0.5))
 
-    for i in range(4096):
-        srgb_table.append(int(linear_to_srgb(float(i) / 4095) * 255 + 0.5))
-
-    for i in range(256):
-        while True:
-            linear = linear_table[i]
-            srgb = srgb_table[linear >> 4]
-
-            if i == srgb:
-                break
-
-            linear_table[i] += 1
-
 
     opts.h_output.write("#pragma once\n")
     opts.h_output.write("#include <stdint.h>\n")
@@ -87,4 +67,4 @@ def main():
 
 
 if __name__ == '__main__':
-    sys.exit(main())
+    main()

search.c

@@ -283,8 +283,13 @@ matches_cell(const struct terminal *term, const struct cell *cell, size_t search
     if (composed == NULL && base == 0 && term->search.buf[search_ofs] == U' ')
         return 1;
 
-    if (c32ncasecmp(&base, &term->search.buf[search_ofs], 1) != 0)
-        return -1;
+    if (hasc32upper(term->search.buf)) {
+        if (c32ncmp(&base, &term->search.buf[search_ofs], 1) != 0)
+            return -1;
+    } else {
+        if (c32ncasecmp(&base, &term->search.buf[search_ofs], 1) != 0)
+            return -1;
+    }
 
     if (composed != NULL) {
         if (search_ofs + composed->count > term->search.len)
@@ -1479,7 +1484,8 @@ search_input(struct seat *seat, struct terminal *term,
         count = xkb_compose_state_get_utf8(
             seat->kbd.xkb_compose_state, (char *)buf, sizeof(buf));
         xkb_compose_state_reset(seat->kbd.xkb_compose_state);
-    } else if (compose_status == XKB_COMPOSE_CANCELLED) {
+    } else if (compose_status == XKB_COMPOSE_CANCELLED ||
+               compose_status == XKB_COMPOSE_COMPOSING) {
         count = 0;
     } else {
         count = xkb_state_key_get_utf8(

selection.c

@@ -19,6 +19,7 @@
 #include "char32.h"
 #include "commands.h"
 #include "config.h"
+#include "debug.h"
 #include "extract.h"
 #include "grid.h"
 #include "misc.h"
@@ -558,9 +559,15 @@ selection_find_quote_left(struct terminal *term, struct coord *pos,
         if (*quote_char == '\0' ? (wc == '"' || wc == '\'')
                                 : wc == *quote_char)
         {
-            pos->row = next_row;
-            pos->col = next_col + 1;
-            xassert(pos->col < term->cols);
+            xassert(next_col + 1 <= term->cols);
+            if (next_col + 1 == term->cols) {
+                xassert(next_row < pos->row);
+                pos->row = next_row + 1;
+                pos->col = 0;
+            } else {
+                pos->row = next_row;
+                pos->col = next_col + 1;
+            }
 
             *quote_char = wc;
             return true;

server.c

@@ -30,7 +30,7 @@ struct client;
 struct terminal_instance;
 
 struct server {
-    const struct config *conf;
+    struct config *conf;
     struct fdm *fdm;
     struct reaper *reaper;
     struct wayland *wayl;
@@ -156,10 +156,61 @@ fdm_client(struct fdm *fdm, int fd, int events, void *data)
     xassert(events & EPOLLIN);
 
     if (client->instance != NULL) {
-        uint8_t dummy[128];
-        ssize_t count = read(fd, dummy, sizeof(dummy));
-        LOG_WARN("client unexpectedly sent %zd bytes", count);
-        return true;  /* TODO: shutdown instead? */
+        struct client_ipc_hdr ipc_hdr;
+        ssize_t count = read(fd, &ipc_hdr, sizeof(ipc_hdr));
+
+        if (count != sizeof(ipc_hdr)) {
+            LOG_WARN("client unexpectedly sent %zd bytes", count);
+            return true;  /* TODO: shutdown instead? */
+        }
+
+        switch (ipc_hdr.ipc_code) {
+        case FOOT_IPC_SIGUSR: {
+            xassert(ipc_hdr.size == sizeof(struct client_ipc_sigusr));
+
+            struct client_ipc_sigusr sigusr;
+            count = read(fd, &sigusr, sizeof(sigusr));
+            if (count < 0) {
+                LOG_ERRNO("failed to read SIGUSR IPC data from client");
+                return true; /* TODO: shutdown instead? */
+            }
+
+            if ((size_t)count != sizeof(sigusr)) {
+                LOG_ERR("failed to read SIGUSR IPC data from client");
+                return true; /* TODO: shutdown instead? */
+            }
+
+            switch (sigusr.signo) {
+            case SIGUSR1:
+                term_theme_switch_to_dark(client->instance->terminal);
+                break;
+
+            case SIGUSR2:
+                term_theme_switch_to_light(client->instance->terminal);
+                break;
+
+            default:
+                LOG_ERR(
+                    "client sent bad SIGUSR number: %d "
+                    "(expected SIGUSR1=%d or SIGUSR2=%d)",
+                    sigusr.signo, SIGUSR1, SIGUSR2);
+                break;
+            }
+
+            return true;
+        }
+
+        default:
+            LOG_WARN(
+                "client sent unrecognized IPC (0x%04x), ignoring %hhu bytes",
+                ipc_hdr.ipc_code, ipc_hdr.size);
+
+            /* TODO: slightly broken, since not all data is guaranteed
+               to be readable yet */
+            uint8_t dummy[ipc_hdr.size];
+            (void)!!read(fd, dummy, ipc_hdr.size);
+            return true;
+        }
     }
 
     if (client->buffer.data == NULL) {
@@ -505,7 +556,7 @@ prepare_socket(int fd)
 }
 
 struct server *
-server_init(const struct config *conf, struct fdm *fdm, struct reaper *reaper,
+server_init(struct config *conf, struct fdm *fdm, struct reaper *reaper,
             struct wayland *wayl)
 {
     int fd;
@@ -617,3 +668,23 @@ server_destroy(struct server *server)
         unlink(server->sock_path);
     free(server);
 }
+
+void
+server_global_theme_switch_to_dark(struct server *server)
+{
+    server->conf->initial_color_theme = COLOR_THEME_DARK;
+    tll_foreach(server->clients, it)
+        term_theme_switch_to_dark(it->item->instance->terminal);
+    tll_foreach(server->terminals, it)
+        term_theme_switch_to_dark(it->item->terminal);
+}
+
+void
+server_global_theme_switch_to_light(struct server *server)
+{
+    server->conf->initial_color_theme = COLOR_THEME_LIGHT;
+    tll_foreach(server->clients, it)
+        term_theme_switch_to_light(it->item->instance->terminal);
+    tll_foreach(server->terminals, it)
+        term_theme_switch_to_light(it->item->terminal);
+}

server.h

@@ -6,6 +6,9 @@
 #include "wayland.h"
 
 struct server;
-struct server *server_init(const struct config *conf, struct fdm *fdm,
+struct server *server_init(struct config *conf, struct fdm *fdm,
                            struct reaper *reaper, struct wayland *wayl);
 void server_destroy(struct server *server);
+
+void server_global_theme_switch_to_dark(struct server *server);
+void server_global_theme_switch_to_light(struct server *server);

shm.c

@@ -13,7 +13,6 @@
 
 #include <pixman.h>
 
-#include <fcft/stride.h>
 #include <tllist.h>
 
 #define LOG_MODULE "shm"
@@ -21,6 +20,7 @@
 #include "log.h"
 #include "debug.h"
 #include "macros.h"
+#include "stride.h"
 #include "xmalloc.h"
 
 #if !defined(MAP_UNINITIALIZED)
@@ -61,6 +61,8 @@ static off_t max_pool_size = 512 * 1024 * 1024;
 static bool can_punch_hole = false;
 static bool can_punch_hole_initialized = false;
 
+static size_t min_stride_alignment = 0;
+
 struct buffer_pool {
     int fd;                /* memfd */
     struct wl_shm_pool *wl_pool;
@@ -82,9 +84,11 @@ struct buffer_private {
     struct buffer_pool *pool;
     off_t offset;             /* Offset into memfd where data begins */
     size_t size;
-    bool with_alpha;
 
     bool scrollable;
+
+    void (*release_cb)(struct buffer *buf, void *data);
+    void *cb_data;
 };
 
 struct buffer_chain {
@@ -93,11 +97,11 @@ struct buffer_chain {
     size_t pix_instances;
     bool scrollable;
 
-    pixman_format_code_t pixman_fmt_without_alpha;
-    enum wl_shm_format shm_format_without_alpha;
+    pixman_format_code_t pixman_fmt;
+    enum wl_shm_format shm_format;
 
-    pixman_format_code_t pixman_fmt_with_alpha;
-    enum wl_shm_format shm_format_with_alpha;
+    void (*release_cb)(struct buffer *buf, void *data);
+    void *cb_data;
 };
 
 static tll(struct buffer_private *) deferred;
@@ -113,6 +117,12 @@ shm_set_max_pool_size(off_t _max_pool_size)
     max_pool_size = _max_pool_size;
 }
 
+void
+shm_set_min_stride_alignment(size_t _min_stride_alignment)
+{
+    min_stride_alignment = _min_stride_alignment;
+}
+
 static void
 buffer_destroy_dont_close(struct buffer *buf)
 {
@@ -224,6 +234,10 @@ buffer_release(void *data, struct wl_buffer *wl_buffer)
         xassert(found);
         if (!found)
             LOG_WARN("deferred delete: buffer not on the 'deferred' list");
+    } else {
+        if (buffer->release_cb != NULL) {
+            buffer->release_cb(&buffer->public, buffer->cb_data);
+        }
     }
 }
 
@@ -231,7 +245,6 @@ static const struct wl_buffer_listener buffer_listener = {
     .release = &buffer_release,
 };
 
-#if __SIZEOF_POINTER__ == 8
 static size_t
 page_size(void)
 {
@@ -248,7 +261,6 @@ page_size(void)
     xassert(size > 0);
     return size;
 }
-#endif
 
 static bool
 instantiate_offset(struct buffer_private *buf, off_t new_offset)
@@ -269,9 +281,7 @@ instantiate_offset(struct buffer_private *buf, off_t new_offset)
     wl_buf = wl_shm_pool_create_buffer(
         pool->wl_pool, new_offset,
         buf->public.width, buf->public.height, buf->public.stride,
-        buf->with_alpha
-            ? buf->chain->shm_format_with_alpha
-            : buf->chain->shm_format_without_alpha);
+        buf->chain->shm_format);
 
     if (wl_buf == NULL) {
         LOG_ERR("failed to create SHM buffer");
@@ -281,9 +291,7 @@ instantiate_offset(struct buffer_private *buf, off_t new_offset)
     /* One pixman image for each worker thread (do we really need multiple?) */
     for (size_t i = 0; i < buf->public.pix_instances; i++) {
         pix[i] = pixman_image_create_bits_no_clear(
-            buf->with_alpha
-                ? buf->chain->pixman_fmt_with_alpha
-                : buf->chain->pixman_fmt_without_alpha,
+            buf->chain->pixman_fmt,
             buf->public.width, buf->public.height,
             (uint32_t *)mmapped, buf->public.stride);
 
@@ -318,8 +326,7 @@ err:
 static void NOINLINE
 get_new_buffers(struct buffer_chain *chain, size_t count,
                 int widths[static count], int heights[static count],
-                struct buffer *bufs[static count], bool with_alpha,
-                bool immediate_purge)
+                struct buffer *bufs[static count], bool immediate_purge)
 {
     xassert(count == 1 || !chain->scrollable);
     /*
@@ -338,7 +345,14 @@ get_new_buffers(struct buffer_chain *chain, size_t count,
     size_t total_size = 0;
     for (size_t i = 0; i < count; i++) {
         stride[i] = stride_for_format_and_width(
-            with_alpha ? PIXMAN_a8r8g8b8 : PIXMAN_x8r8g8b8, widths[i]);
+            chain->pixman_fmt, widths[i]);
+
+        if (min_stride_alignment > 0) {
+            const size_t m = min_stride_alignment;
+            stride[i] = (stride[i] + m - 1) / m * m;
+        }
+
+        xassert(min_stride_alignment == 0 || stride[i] % min_stride_alignment == 0);
         sizes[i] = stride[i] * heights[i];
         total_size += sizes[i];
     }
@@ -380,9 +394,11 @@ get_new_buffers(struct buffer_chain *chain, size_t count,
         goto err;
     }
 
+    const size_t page_sz = page_size();
+
 #if __SIZEOF_POINTER__ == 8
     off_t offset = chain->scrollable && max_pool_size > 0
-        ? (max_pool_size / 4) & ~(page_size() - 1)
+        ? (max_pool_size / 4) & ~(page_sz - 1)
         : 0;
     off_t memfd_size = chain->scrollable && max_pool_size > 0
         ? max_pool_size
@@ -392,7 +408,8 @@ get_new_buffers(struct buffer_chain *chain, size_t count,
     off_t memfd_size = total_size;
 #endif
 
-    xassert(chain->scrollable || (offset == 0 && memfd_size == total_size));
+    /* Page align */
+    memfd_size = (memfd_size + page_sz - 1) & ~(page_sz - 1);
 
     LOG_DBG("memfd-size: %lu, initial offset: %lu", memfd_size, offset);
 
@@ -424,6 +441,9 @@ get_new_buffers(struct buffer_chain *chain, size_t count,
         memfd_size = total_size;
         chain->scrollable = false;
 
+        /* Page align */
+        memfd_size = (memfd_size + page_sz - 1) & ~(page_sz - 1);
+
         if (ftruncate(pool_fd, memfd_size) < 0) {
             LOG_ERRNO("failed to set size of SHM backing memory file");
             goto err;
@@ -489,11 +509,12 @@ get_new_buffers(struct buffer_chain *chain, size_t count,
             .chain = chain,
             .ref_count = immediate_purge ? 0 : 1,
             .busy = true,
-            .with_alpha = with_alpha,
             .pool = pool,
             .offset = 0,
             .size = sizes[i],
             .scrollable = chain->scrollable,
+            .release_cb = chain->release_cb,
+            .cb_data = chain->cb_data,
         };
 
         if (!instantiate_offset(buf, offset)) {
@@ -559,13 +580,13 @@ shm_did_not_use_buf(struct buffer *_buf)
 void
 shm_get_many(struct buffer_chain *chain, size_t count,
              int widths[static count], int heights[static count],
-             struct buffer *bufs[static count], bool with_alpha)
+             struct buffer *bufs[static count])
 {
-    get_new_buffers(chain, count, widths, heights, bufs, with_alpha, true);
+    get_new_buffers(chain, count, widths, heights, bufs, true);
 }
 
 struct buffer *
-shm_get_buffer(struct buffer_chain *chain, int width, int height, bool with_alpha)
+shm_get_buffer(struct buffer_chain *chain, int width, int height)
 {
     LOG_DBG(
         "chain=%p: looking for a reusable %dx%d buffer "
@@ -576,9 +597,7 @@ shm_get_buffer(struct buffer_chain *chain, int width, int height, bool with_alph
     tll_foreach(chain->bufs, it) {
         struct buffer_private *buf = it->item;
 
-        if (buf->public.width != width || buf->public.height != height ||
-            with_alpha != buf->with_alpha)
-        {
+        if (buf->public.width != width || buf->public.height != height) {
             LOG_DBG("purging mismatching buffer %p", (void *)buf);
             if (buffer_unref_no_remove_from_chain(buf))
                 tll_remove(chain->bufs, it);
@@ -594,9 +613,9 @@ shm_get_buffer(struct buffer_chain *chain, int width, int height, bool with_alph
             else
 #endif
             {
-                if (cached == NULL)
+                if (cached == NULL) {
                     cached = buf;
-                else {
+                } else {
                     /* We have multiple buffers eligible for
                      * reuse. Pick the "youngest" one, and mark the
                      * other one for purging */
@@ -629,7 +648,7 @@ shm_get_buffer(struct buffer_chain *chain, int width, int height, bool with_alph
     }
 
     struct buffer *ret;
-    get_new_buffers(chain, 1, &width, &height, &ret, with_alpha, false);
+    get_new_buffers(chain, 1, &width, &height, &ret, false);
     return ret;
 }
 
@@ -972,24 +991,43 @@ shm_unref(struct buffer *_buf)
 
 struct buffer_chain *
 shm_chain_new(struct wayland *wayl, bool scrollable, size_t pix_instances,
-              bool ten_bit_if_capable)
+              enum shm_bit_depth desired_bit_depth,
+              void (*release_cb)(struct buffer *buf, void *data), void *cb_data)
 {
-    pixman_format_code_t pixman_fmt_without_alpha = PIXMAN_x8r8g8b8;
-    enum wl_shm_format shm_fmt_without_alpha = WL_SHM_FORMAT_XRGB8888;
-
-    pixman_format_code_t pixman_fmt_with_alpha = PIXMAN_a8r8g8b8;
-    enum wl_shm_format shm_fmt_with_alpha = WL_SHM_FORMAT_ARGB8888;
+    pixman_format_code_t pixman_fmt = PIXMAN_a8r8g8b8;
+    enum wl_shm_format shm_fmt = WL_SHM_FORMAT_ARGB8888;
 
     static bool have_logged = false;
+    static bool have_logged_10_fallback = false;
 
+#if defined(HAVE_PIXMAN_RGBA_16)
+    static bool have_logged_16_fallback = false;
 
-    if (ten_bit_if_capable) {
-        if (wayl->shm_have_argb2101010 && wayl->shm_have_xrgb2101010) {
-            pixman_fmt_without_alpha = PIXMAN_x2r10g10b10;
-            shm_fmt_without_alpha = WL_SHM_FORMAT_XRGB2101010;
+    if (desired_bit_depth == SHM_BITS_16) {
+        if (wayl->shm_have_abgr161616) {
+            pixman_fmt = PIXMAN_a16b16g16r16;
+            shm_fmt = WL_SHM_FORMAT_ABGR16161616;
 
-            pixman_fmt_with_alpha = PIXMAN_a2r10g10b10;
-            shm_fmt_with_alpha = WL_SHM_FORMAT_ARGB2101010;
+            if (!have_logged) {
+                have_logged = true;
+                LOG_INFO("using 16-bit BGR surfaces");
+            }
+        } else {
+            if (!have_logged_16_fallback) {
+                have_logged_16_fallback = true;
+
+                LOG_WARN(
+                    "16-bit surfaces requested, but compositor does not "
+                    "implement ABGR161616+XBGR161616");
+            }
+        }
+    }
+#endif
+
+    if (desired_bit_depth >= SHM_BITS_10 && pixman_fmt == PIXMAN_a8r8g8b8) {
+        if (wayl->shm_have_argb2101010) {
+            pixman_fmt = PIXMAN_a2r10g10b10;
+            shm_fmt = WL_SHM_FORMAT_ARGB2101010;
 
             if (!have_logged) {
                 have_logged = true;
@@ -997,12 +1035,9 @@ shm_chain_new(struct wayland *wayl, bool scrollable, size_t pix_instances,
             }
         }
 
-        else if (wayl->shm_have_abgr2101010 && wayl->shm_have_xbgr2101010) {
-            pixman_fmt_without_alpha = PIXMAN_x2b10g10r10;
-            shm_fmt_without_alpha = WL_SHM_FORMAT_XBGR2101010;
-
-            pixman_fmt_with_alpha = PIXMAN_a2b10g10r10;
-            shm_fmt_with_alpha = WL_SHM_FORMAT_ABGR2101010;
+        else if (wayl->shm_have_abgr2101010) {
+            pixman_fmt = PIXMAN_a2b10g10r10;
+            shm_fmt = WL_SHM_FORMAT_ABGR2101010;
 
             if (!have_logged) {
                 have_logged = true;
@@ -1011,13 +1046,13 @@ shm_chain_new(struct wayland *wayl, bool scrollable, size_t pix_instances,
         }
 
         else {
-            if (!have_logged) {
-                have_logged = true;
+            if (!have_logged_10_fallback) {
+                have_logged_10_fallback = true;
 
                 LOG_WARN(
                     "10-bit surfaces requested, but compositor does not "
                     "implement ARGB2101010+XRGB2101010, or "
-                    "ABGR2101010+XBGR2101010. Falling back to 8-bit surfaces");
+                    "ABGR2101010+XBGR2101010");
             }
         }
     } else  {
@@ -1034,11 +1069,11 @@ shm_chain_new(struct wayland *wayl, bool scrollable, size_t pix_instances,
         .pix_instances = pix_instances,
         .scrollable = scrollable,
 
-        .pixman_fmt_without_alpha = pixman_fmt_without_alpha,
-        .shm_format_without_alpha = shm_fmt_without_alpha,
+        .pixman_fmt = pixman_fmt,
+        .shm_format = shm_fmt,
 
-        .pixman_fmt_with_alpha = pixman_fmt_with_alpha,
-        .shm_format_with_alpha = shm_fmt_with_alpha,
+        .release_cb = release_cb,
+        .cb_data = cb_data,
     };
     return chain;
 }
@@ -1058,3 +1093,17 @@ shm_chain_free(struct buffer_chain *chain)
 
     free(chain);
 }
+
+enum shm_bit_depth
+shm_chain_bit_depth(const struct buffer_chain *chain)
+{
+    const pixman_format_code_t fmt = chain->pixman_fmt;
+
+    return fmt == PIXMAN_a8r8g8b8
+        ? SHM_BITS_8
+#if defined(HAVE_PIXMAN_RGBA_16)
+        : fmt == PIXMAN_a16b16g16r16
+            ? SHM_BITS_16
+#endif
+        : SHM_BITS_10;
+}

shm.h

@@ -9,6 +9,7 @@
 
 #include <tllist.h>
 
+#include "config.h"
 #include "wayland.h"
 
 struct damage;
@@ -41,14 +42,20 @@ struct buffer {
 };
 
 void shm_fini(void);
+
+/* TODO: combine into shm_init() */
 void shm_set_max_pool_size(off_t max_pool_size);
+void shm_set_min_stride_alignment(size_t min_stride_alignment);
 
 struct buffer_chain;
 struct buffer_chain *shm_chain_new(
     struct wayland *wayl, bool scrollable, size_t pix_instances,
-    bool ten_bit_it_if_capable);
+    enum shm_bit_depth desired_bit_depth,
+    void (*release_cb)(struct buffer *buf, void *data), void *cb_data);
 void shm_chain_free(struct buffer_chain *chain);
 
+enum shm_bit_depth shm_chain_bit_depth(const struct buffer_chain *chain);
+ 
 /*
  * Returns a single buffer.
  *
@@ -58,8 +65,7 @@ void shm_chain_free(struct buffer_chain *chain);
  *
  * A newly allocated buffer has an age of 1234.
  */
-struct buffer *shm_get_buffer(
-    struct buffer_chain *chain, int width, int height, bool with_alpha);
+struct buffer *shm_get_buffer(struct buffer_chain *chain, int width, int height);
 /*
  * Returns many buffers, described by 'info', all sharing the same SHM
  * buffer pool.
@@ -77,7 +83,7 @@ struct buffer *shm_get_buffer(
 void shm_get_many(
     struct buffer_chain *chain, size_t count,
     int widths[static count], int heights[static count],
-    struct buffer *bufs[static count], bool with_alpha);
+    struct buffer *bufs[static count]);
 
 void shm_did_not_use_buf(struct buffer *buf);
 

sixel.c

@@ -110,23 +110,34 @@ sixel_init(struct terminal *term, int p1, int p2, int p3)
     term->sixel.image.height = 0;
     term->sixel.image.alloc_height = 0;
     term->sixel.image.bottom_pixel = 0;
-    term->sixel.linear_blending = render_do_linear_blending(term);
+    term->sixel.linear_blending = wayl_do_linear_blending(term->wl, term->conf);
     term->sixel.pixman_fmt = PIXMAN_a8r8g8b8;
 
-    if (term->conf->tweak.surface_bit_depth == SHM_10_BIT) {
-        if (term->wl->shm_have_argb2101010 && term->wl->shm_have_xrgb2101010) {
+    /*
+     * Use higher-precision sixel surfaces if we're using
+     * higher-precision window surfaces.
+     *
+     * This is to a) get more accurate colors when doing gamma-correct
+     * blending, and b) use the same pixman format as the main
+     * surfaces, for (hopefully) better performance.
+     *
+     * For now, don't support 16-bit surfaces (too much sixel logic
+     * that assumes 32-bit pixels).
+     */
+    if (shm_chain_bit_depth(term->render.chains.grid) >= SHM_BITS_10) {
+        if (term->wl->shm_have_argb2101010) {
             term->sixel.use_10bit = true;
             term->sixel.pixman_fmt = PIXMAN_a2r10g10b10;
         }
 
-        else if (term->wl->shm_have_abgr2101010 && term->wl->shm_have_xbgr2101010) {
+        else if (term->wl->shm_have_abgr2101010) {
             term->sixel.use_10bit = true;
             term->sixel.pixman_fmt = PIXMAN_a2b10g10r10;
         }
     }
 
     const size_t active_palette_entries = min(
-            ALEN(term->conf->colors.sixel), term->sixel.palette_size);
+            ALEN(term->conf->colors_dark.sixel), term->sixel.palette_size);
 
     if (term->sixel.use_private_palette) {
         xassert(term->sixel.private_palette == NULL);
@@ -134,7 +145,7 @@ sixel_init(struct terminal *term, int p1, int p2, int p3)
             term->sixel.palette_size, sizeof(term->sixel.private_palette[0]));
 
         memcpy(
-            term->sixel.private_palette, term->conf->colors.sixel,
+            term->sixel.private_palette, term->conf->colors_dark.sixel,
             active_palette_entries * sizeof(term->sixel.private_palette[0]));
 
         if (term->sixel.linear_blending || term->sixel.use_10bit) {
@@ -153,7 +164,7 @@ sixel_init(struct terminal *term, int p1, int p2, int p3)
                 term->sixel.palette_size, sizeof(term->sixel.shared_palette[0]));
 
             memcpy(
-                term->sixel.shared_palette, term->conf->colors.sixel,
+                term->sixel.shared_palette, term->conf->colors_dark.sixel,
                 active_palette_entries * sizeof(term->sixel.shared_palette[0]));
 
             if (term->sixel.linear_blending || term->sixel.use_10bit) {
@@ -1548,6 +1559,9 @@ resize(struct terminal *term, int new_width_mutable, int new_height_mutable)
         new_height_mutable = term->sixel.max_height;
     }
 
+    if (unlikely(new_height_mutable == 0)) {
+        new_height_mutable = 6 * term->sixel.pan;
+    }
 
     uint32_t *old_data = term->sixel.image.data;
     const int old_width = term->sixel.image.width;

slave.c

@@ -436,8 +436,54 @@ slave_spawn(int ptmx, int argc, const char *cwd, char *const *argv,
         add_to_env(&custom_env, "COLORTERM", "truecolor");
         add_to_env(&custom_env, "PWD", cwd);
 
-        del_from_env(&custom_env, "TERM_PROGRAM");
-        del_from_env(&custom_env, "TERM_PROGRAM_VERSION");
+        del_from_env(&custom_env, "TERM_PROGRAM");            /* Wezterm, Ghostty */
+        del_from_env(&custom_env, "TERM_PROGRAM_VERSION");    /* Wezterm, Ghostty */
+        del_from_env(&custom_env, "TERMINAL_NAME");           /* Contour */
+        del_from_env(&custom_env, "TERMINAL_VERSION_STRING"); /* Contour */
+        del_from_env(&custom_env, "TERMINAL_VERSION_TRIPLE"); /* Contour */
+
+        /* XTerm specific */
+        del_from_env(&custom_env, "XTERM_SHELL");
+        del_from_env(&custom_env, "XTERM_VERSION");
+        del_from_env(&custom_env, "XTERM_LOCALE");
+
+        /* Mlterm specific */
+        del_from_env(&custom_env, "MLTERM");
+
+        /* Zutty specific */
+        del_from_env(&custom_env, "ZUTTY_VERSION");
+
+        /* Ghostty specific */
+        del_from_env(&custom_env, "GHOSTTY_BIN_DIR");
+        del_from_env(&custom_env, "GHOSTTY_SHELL_INTEGRATION_NO_SUDO");
+        del_from_env(&custom_env, "GHOSTTY_RESOURCES_DIR");
+
+        /* Kitty specific */
+        del_from_env(&custom_env, "KITTY_WINDOW_ID");
+        del_from_env(&custom_env, "KITTY_PID");
+        del_from_env(&custom_env, "KITTY_PUBLIC_KEY");
+        del_from_env(&custom_env, "KITTY_INSTALLATION_DIR");
+
+        /* Contour specific */
+        del_from_env(&custom_env, "CONTOUR_PROFILE");
+
+        /* Wezterm specific */
+        del_from_env(&custom_env, "WEZTERM_PANE");
+        del_from_env(&custom_env, "WEZTERM_EXECUTABLE");
+        del_from_env(&custom_env, "WEZTERM_CONFIG_FILE");
+        del_from_env(&custom_env, "WEZTERM_EXECUTABLE_DIR");
+        del_from_env(&custom_env, "WEZTERM_UNIX_SOCKET");
+        del_from_env(&custom_env, "WEZTERM_CONFIG_DIR");
+
+        /* Alacritty specific */
+        del_from_env(&custom_env, "ALACRITTY_LOG");
+        del_from_env(&custom_env, "ALACRITTY_WINDOW_ID");
+        del_from_env(&custom_env, "ALACRITTY_SOCKET");
+
+        /* VTE, gnome-terminal, kgx etc */
+        del_from_env(&custom_env, "VTE_VERSION");
+        del_from_env(&custom_env, "GNOME_TERMINAL_SERVICE");
+        del_from_env(&custom_env, "GNOME_TERMINAL_SCREEN");
 
 #if defined(FOOT_TERMINFO_PATH)
         add_to_env(&custom_env, "TERMINFO", FOOT_TERMINFO_PATH);

terminal.c

@@ -199,7 +199,7 @@ add_utmp_record(const struct config *conf, struct reaper *reaper, int ptmx)
         return true;
 
     char *const argv[] = {conf->utmp_helper_path, UTMP_ADD, getenv("WAYLAND_DISPLAY"), NULL};
-    return spawn(reaper, NULL, argv, ptmx, ptmx, -1, NULL, NULL, NULL) >= 0;
+    return spawn(reaper, NULL, argv, ptmx, -1, -1, NULL, NULL, NULL) >= 0;
 #else
     return true;
 #endif
@@ -223,7 +223,7 @@ del_utmp_record(const struct config *conf, struct reaper *reaper, int ptmx)
         ;
 
     char *const argv[] = {conf->utmp_helper_path, UTMP_DEL, del_argument, NULL};
-    return spawn(reaper, NULL, argv, ptmx, ptmx, -1, NULL, NULL, NULL) >= 0;
+    return spawn(reaper, NULL, argv, ptmx, -1, -1, NULL, NULL, NULL) >= 0;
 #else
     return true;
 #endif
@@ -719,6 +719,9 @@ initialize_render_workers(struct terminal *term)
         goto err_sem_destroy;
     }
 
+    mtx_init(&term->render.workers.preapplied_damage.lock, mtx_plain);
+    cnd_init(&term->render.workers.preapplied_damage.cond);
+
     term->render.workers.threads = xcalloc(
         term->render.workers.count, sizeof(term->render.workers.threads[0]));
 
@@ -1073,19 +1076,20 @@ reload_fonts(struct terminal *term, bool resize_grid)
 
     options->scaling_filter = conf->tweak.fcft_filter;
     options->color_glyphs.format = PIXMAN_a8r8g8b8;
-    options->color_glyphs.srgb_decode = render_do_linear_blending(term);
+    options->color_glyphs.srgb_decode =
+        wayl_do_linear_blending(term->wl, term->conf);
 
-    if (conf->tweak.surface_bit_depth == SHM_10_BIT) {
-        if ((term->wl->shm_have_argb2101010 && term->wl->shm_have_xrgb2101010) ||
-            (term->wl->shm_have_abgr2101010 && term->wl->shm_have_xbgr2101010))
-        {
-            /*
-             * Use a high-res buffer type for emojis. We don't want to
-             * use an a2r10g0b10 type of surface, since we need more
-             * than 2 bits for alpha.
-             */
-            options->color_glyphs.format = PIXMAN_rgba_float;
-        }
+    if (shm_chain_bit_depth(term->render.chains.grid) >= SHM_BITS_10) {
+        /*
+         * Use a high-res buffer type for emojis. We don't want to use
+         * an a2r10g0b10 type of surface, since we need more than 2
+         * bits for alpha.
+         */
+#if defined(HAVE_PIXMAN_RGBA_16)
+        options->color_glyphs.format = PIXMAN_a16b16g16r16;
+#else
+        options->color_glyphs.format = PIXMAN_rgba_float;
+#endif
     }
 
     struct fcft_font *fonts[4];
@@ -1260,7 +1264,18 @@ term_init(const struct config *conf, struct fdm *fdm, struct reaper *reaper,
         goto err;
     }
 
-    const bool ten_bit_surfaces = conf->tweak.surface_bit_depth == SHM_10_BIT;
+    const enum shm_bit_depth desired_bit_depth =
+        conf->tweak.surface_bit_depth == SHM_BITS_AUTO
+            ? wayl_do_linear_blending(wayl, conf) ? SHM_BITS_16 : SHM_BITS_8
+            : conf->tweak.surface_bit_depth;
+
+    const struct color_theme *theme = NULL;
+    switch (conf->initial_color_theme) {
+    case COLOR_THEME_DARK: theme = &conf->colors_dark; break;
+    case COLOR_THEME_LIGHT: theme = &conf->colors_light; break;
+    case COLOR_THEME_1: BUG("COLOR_THEME_1 should not be used"); break;
+    case COLOR_THEME_2: BUG("COLOR_THEME_2 should not be used"); break;
+    }
 
     /* Initialize configure-based terminal attributes */
     *term = (struct terminal) {
@@ -1279,7 +1294,7 @@ term_init(const struct config *conf, struct fdm *fdm, struct reaper *reaper,
         },
         .font_dpi = 0.,
         .font_dpi_before_unmap = -1.,
-        .font_subpixel = (conf->colors.alpha == 0xffff  /* Can't do subpixel rendering on transparent background */
+        .font_subpixel = (theme->alpha == 0xffff  /* Can't do subpixel rendering on transparent background */
                           ? FCFT_SUBPIXEL_DEFAULT
                           : FCFT_SUBPIXEL_NONE),
         .cursor_keys_mode = CURSOR_KEYS_NORMAL,
@@ -1295,14 +1310,14 @@ term_init(const struct config *conf, struct fdm *fdm, struct reaper *reaper,
             .state = 0,  /* STATE_GROUND */
         },
         .colors = {
-            .fg = conf->colors.fg,
-            .bg = conf->colors.bg,
-            .alpha = conf->colors.alpha,
-            .cursor_fg = conf->cursor.color.text,
-            .cursor_bg = conf->cursor.color.cursor,
-            .selection_fg = conf->colors.selection_fg,
-            .selection_bg = conf->colors.selection_bg,
-            .use_custom_selection = conf->colors.use_custom.selection,
+            .fg = theme->fg,
+            .bg = theme->bg,
+            .alpha = theme->alpha,
+            .cursor_fg = (theme->use_custom.cursor ? 1u << 31 : 0) | theme->cursor.text,
+            .cursor_bg = (theme->use_custom.cursor ? 1u << 31 : 0) | theme->cursor.cursor,
+            .selection_fg = theme->selection_fg,
+            .selection_bg = theme->selection_bg,
+            .active_theme = conf->initial_color_theme,
         },
         .color_stack = {
             .stack = NULL,
@@ -1346,13 +1361,13 @@ term_init(const struct config *conf, struct fdm *fdm, struct reaper *reaper,
         .render = {
             .chains = {
                 .grid = shm_chain_new(wayl, true, 1 + conf->render_worker_count,
-                                      ten_bit_surfaces),
-                .search = shm_chain_new(wayl, false, 1 ,ten_bit_surfaces),
-                .scrollback_indicator = shm_chain_new(wayl, false, 1, ten_bit_surfaces),
-                .render_timer = shm_chain_new(wayl, false, 1, ten_bit_surfaces),
-                .url = shm_chain_new(wayl, false, 1, ten_bit_surfaces),
-                .csd = shm_chain_new(wayl, false, 1, ten_bit_surfaces),
-                .overlay = shm_chain_new(wayl, false, 1, ten_bit_surfaces),
+                                      desired_bit_depth, &render_buffer_release_callback, term),
+                .search = shm_chain_new(wayl, false, 1 ,desired_bit_depth, NULL, NULL),
+                .scrollback_indicator = shm_chain_new(wayl, false, 1, desired_bit_depth, NULL, NULL),
+                .render_timer = shm_chain_new(wayl, false, 1, desired_bit_depth, NULL, NULL),
+                .url = shm_chain_new(wayl, false, 1, desired_bit_depth, NULL, NULL),
+                .csd = shm_chain_new(wayl, false, 1, desired_bit_depth, NULL, NULL),
+                .overlay = shm_chain_new(wayl, false, 1, desired_bit_depth, NULL, NULL),
             },
             .scrollback_lines = conf->scrollback.lines,
             .app_sync_updates.timer_fd = app_sync_updates_fd,
@@ -1399,6 +1414,7 @@ term_init(const struct config *conf, struct fdm *fdm, struct reaper *reaper,
     pixman_region32_init(&term->render.last_overlay_clip);
 
     term_update_ascii_printer(term);
+    memcpy(term->colors.table, theme->table, sizeof(term->colors.table));
 
     for (size_t i = 0; i < 4; i++) {
         const struct config_font_list *font_list = &conf->fonts[i];
@@ -1433,8 +1449,6 @@ term_init(const struct config *conf, struct fdm *fdm, struct reaper *reaper,
     xassert(tll_length(term->wl->monitors) > 0);
     term->scale = tll_front(term->wl->monitors).scale;
 
-    memcpy(term->colors.table, term->conf->colors.table, sizeof(term->colors.table));
-
     /* Initialize the Wayland window backend */
     if ((term->window = wayl_win_init(term, token)) == NULL)
         goto err;
@@ -1495,7 +1509,7 @@ term_window_configured(struct terminal *term)
         xassert(term->window->is_configured);
         fdm_add(term->fdm, term->ptmx, EPOLLIN, &fdm_ptmx, term);
 
-        const bool gamma_correct = render_do_linear_blending(term);
+        const bool gamma_correct = wayl_do_linear_blending(term->wl, term->conf);
         LOG_INFO("gamma-correct blending: %s", gamma_correct ? "enabled" : "disabled");
     }
 }
@@ -1884,6 +1898,8 @@ term_destroy(struct terminal *term)
         }
     }
     free(term->render.workers.threads);
+    mtx_destroy(&term->render.workers.preapplied_damage.lock);
+    cnd_destroy(&term->render.workers.preapplied_damage.cond);
     mtx_destroy(&term->render.workers.lock);
     sem_destroy(&term->render.workers.start);
     sem_destroy(&term->render.workers.done);
@@ -2064,6 +2080,19 @@ erase_line(struct terminal *term, struct row *row)
     row->shell_integration.cmd_end = -1;
 }
 
+static void
+term_theme_apply(struct terminal *term, const struct color_theme *theme)
+{
+    term->colors.fg = theme->fg;
+    term->colors.bg = theme->bg;
+    term->colors.alpha = theme->alpha;
+    term->colors.cursor_fg = (theme->use_custom.cursor ? 1u << 31 : 0) | theme->cursor.text;
+    term->colors.cursor_bg = (theme->use_custom.cursor ? 1u << 31 : 0) | theme->cursor.cursor;
+    term->colors.selection_fg = theme->selection_fg;
+    term->colors.selection_bg = theme->selection_bg;
+    memcpy(term->colors.table, theme->table, sizeof(term->colors.table));
+}
+
 void
 term_reset(struct terminal *term, bool hard)
 {
@@ -2147,19 +2176,20 @@ term_reset(struct terminal *term, bool hard)
     if (!hard)
         return;
 
+    const struct color_theme *theme = NULL;
+
+    switch (term->conf->initial_color_theme) {
+    case COLOR_THEME_DARK: theme = &term->conf->colors_dark; break;
+    case COLOR_THEME_LIGHT: theme = &term->conf->colors_light; break;
+    case COLOR_THEME_1: BUG("COLOR_THEME_1 should not be used"); break;
+    case COLOR_THEME_2: BUG("COLOR_THEME_2 should not be used"); break;
+    }
+
     term->flash.active = false;
     term->blink.state = BLINK_ON;
     fdm_del(term->fdm, term->blink.fd); term->blink.fd = -1;
-    term->colors.fg = term->conf->colors.fg;
-    term->colors.bg = term->conf->colors.bg;
-    term->colors.alpha = term->conf->colors.alpha;
-    term->colors.cursor_fg = term->conf->cursor.color.text;
-    term->colors.cursor_bg = term->conf->cursor.color.cursor;
-    term->colors.selection_fg = term->conf->colors.selection_fg;
-    term->colors.selection_bg = term->conf->colors.selection_bg;
-    term->colors.use_custom_selection = term->conf->colors.use_custom.selection;
-    memcpy(term->colors.table, term->conf->colors.table,
-           sizeof(term->colors.table));
+    term_theme_apply(term, theme);
+    term->colors.active_theme = term->conf->initial_color_theme;
     free(term->color_stack.stack);
     term->color_stack.stack = NULL;
     term->color_stack.size = 0;
@@ -2760,13 +2790,11 @@ UNITTEST
             },
             .kind = SELECTION_NONE,
             .auto_scroll = {
-                .fd = timerfd_create(CLOCK_MONOTONIC, TFD_CLOEXEC | TFD_NONBLOCK),
+                .fd = -1,
             },
         },
     };
 
-    xassert(term.selection.auto_scroll.fd >= 0);
-
 #define populate_scrollback() do {                                      \
         for (int i = 0; i < scrollback_rows; i++) {                     \
             if (term.normal.rows[i] == NULL) {                          \
@@ -2856,7 +2884,7 @@ UNITTEST
 
     /* Cleanup */
     tll_free(term.normal.sixel_images);
-    close(term.selection.auto_scroll.fd);
+    xassert(term.selection.auto_scroll.fd == -1);
     for (int i = 0; i < scrollback_rows; i++)
         grid_row_free(term.normal.rows[i]);
     free(term.normal.rows);
@@ -3141,11 +3169,17 @@ term_scroll_reverse_partial(struct terminal *term,
 
     sixel_scroll_down(term, rows);
 
-    bool view_follows = term->grid->view == term->grid->offset;
+    const bool view_follows = term->grid->view == term->grid->offset;
     term->grid->offset -= rows;
     term->grid->offset += term->grid->num_rows;
     term->grid->offset &= term->grid->num_rows - 1;
 
+    /* How many lines from the scrollback start is the current viewport? */
+    const int view_sb_start_distance = grid_row_abs_to_sb(
+        term->grid, term->rows, term->grid->view);
+    const int offset_sb_start_distance = grid_row_abs_to_sb(
+        term->grid, term->rows, term->grid->offset);
+
     xassert(term->grid->offset >= 0);
     xassert(term->grid->offset < term->grid->num_rows);
 
@@ -3153,6 +3187,11 @@ term_scroll_reverse_partial(struct terminal *term,
         term_damage_scroll(term, DAMAGE_SCROLL_REVERSE, region, rows);
         selection_view_up(term, term->grid->offset);
         term->grid->view = term->grid->offset;
+    } else if (unlikely(view_sb_start_distance > offset_sb_start_distance)) {
+        /* Part of current view is being scrolled out */
+        int new_view = term->grid->offset;
+        selection_view_up(term, new_view);
+        term->grid->view = new_view;
     }
 
     /* Bottom non-scrolling region */
@@ -3169,11 +3208,16 @@ term_scroll_reverse_partial(struct terminal *term,
         erase_line(term, row);
     }
 
+    if (unlikely(view_sb_start_distance > offset_sb_start_distance))
+        term_damage_view(term);
+
     term->grid->cur_row = grid_row(term->grid, term->grid->cursor.point.row);
 
 #if defined(_DEBUG)
     for (int r = 0; r < term->rows; r++)
         xassert(grid_row(term->grid, r) != NULL);
+    for (int r = 0; r < term->rows; r++)
+        xassert(grid_row_in_view(term->grid, r) != NULL);
 #endif
 }
 
@@ -3380,10 +3424,13 @@ report_mouse_click(struct terminal *term, int encoded_button, int row, int col,
                  encoded_button, col + 1, row + 1, release ? 'm' : 'M');
         break;
 
-    case MOUSE_SGR_PIXELS:
+    case MOUSE_SGR_PIXELS: {
+        const int bounded_col = max(col_pixels, 0);
+        const int bounded_row = max(row_pixels, 0);
         snprintf(response, sizeof(response), "\033[<%d;%d;%d%c",
-                 encoded_button, col_pixels + 1, row_pixels + 1, release ? 'm' : 'M');
+                 encoded_button, bounded_col + 1, bounded_row + 1, release ? 'm' : 'M');
         break;
+    }
 
     case MOUSE_URXVT:
         snprintf(response, sizeof(response), "\033[%d;%d;%dM",
@@ -3564,7 +3611,9 @@ term_xcursor_update_for_seat(struct terminal *term, struct seat *seat)
         if (seat->pointer.hidden)
             shape = CURSOR_SHAPE_HIDDEN;
 
-        else if (cursor_string_to_server_shape(term->mouse_user_cursor) != 0 ||
+        else if (cursor_string_to_server_shape(
+            term->mouse_user_cursor,
+            term->wl->shape_manager_version) != 0 ||
                  render_xcursor_is_valid(seat, term->mouse_user_cursor))
         {
             shape = CURSOR_SHAPE_CUSTOM;
@@ -3984,9 +4033,11 @@ term_print(struct terminal *term, char32_t wc, int width, bool insert_mode_disab
     cell->wc = term->vt.last_printed = wc;
     cell->attrs = term->vt.attrs;
 
-    if (term->vt.osc8.uri != NULL) {
-        grid_row_uri_range_put(
-            row, col, term->vt.osc8.uri, term->vt.osc8.id);
+    if (unlikely(term->vt.osc8.uri != NULL)) {
+        for (int i = 0; i < width && (col + i) < term->cols; i++) {
+            grid_row_uri_range_put(
+                row, col + i, term->vt.osc8.uri, term->vt.osc8.id);
+        }
 
         switch (term->conf->url.osc8_underline) {
         case OSC8_UNDERLINE_ALWAYS:
@@ -4693,3 +4744,68 @@ term_send_size_notification(struct terminal *term)
         term->rows, term->cols, height, width);
     term_to_slave(term, buf, n);
 }
+
+void
+term_theme_switch_to_dark(struct terminal *term)
+{
+    if (term->colors.active_theme == COLOR_THEME_DARK)
+        return;
+
+    term_theme_apply(term, &term->conf->colors_dark);
+    term->colors.active_theme = COLOR_THEME_DARK;
+
+    wayl_win_alpha_changed(term->window);
+    term_font_subpixel_changed(term);
+
+    if (term->report_theme_changes)
+        term_to_slave(term, "\033[?997;1n", 9);
+
+    term_damage_view(term);
+    term_damage_margins(term);
+    render_refresh(term);
+}
+
+void
+term_theme_switch_to_light(struct terminal *term)
+{
+    if (term->colors.active_theme == COLOR_THEME_LIGHT)
+        return;
+
+    term_theme_apply(term, &term->conf->colors_light);
+    term->colors.active_theme = COLOR_THEME_LIGHT;
+
+    wayl_win_alpha_changed(term->window);
+    term_font_subpixel_changed(term);
+
+    if (term->report_theme_changes)
+        term_to_slave(term, "\033[?997;2n", 9);
+
+    term_damage_view(term);
+    term_damage_margins(term);
+    render_refresh(term);
+}
+
+void
+term_theme_toggle(struct terminal *term)
+{
+    if (term->colors.active_theme == COLOR_THEME_DARK) {
+        term_theme_apply(term, &term->conf->colors_light);
+        term->colors.active_theme = COLOR_THEME_LIGHT;
+
+        if (term->report_theme_changes)
+            term_to_slave(term, "\033[?997;2n", 9);
+    } else {
+        term_theme_apply(term, &term->conf->colors_dark);
+        term->colors.active_theme = COLOR_THEME_DARK;
+
+        if (term->report_theme_changes)
+            term_to_slave(term, "\033[?997;1n", 9);
+    }
+
+    wayl_win_alpha_changed(term->window);
+    term_font_subpixel_changed(term);
+
+    term_damage_view(term);
+    term_damage_margins(term);
+    render_refresh(term);
+}

terminal.h

@@ -404,7 +404,7 @@ struct colors {
     uint32_t cursor_bg;  /* cursor color */
     uint32_t selection_fg;
     uint32_t selection_bg;
-    bool use_custom_selection;
+    enum which_color_theme active_theme;
 };
 
 struct terminal {
@@ -517,6 +517,7 @@ struct terminal {
 
     bool num_lock_modifier;
     bool bell_action_enabled;
+    bool report_theme_changes;
 
     /* Saved DECSET modes - we save the SET state */
     struct {
@@ -547,6 +548,7 @@ struct terminal {
         bool ime:1;
         bool app_sync_updates:1;
         bool grapheme_shaping:1;
+        bool report_theme_changes:1;
 
         bool size_notifications:1;
 
@@ -704,6 +706,14 @@ struct terminal {
             tll(int) queue;
             thrd_t *threads;
             struct buffer *buf;
+
+            struct {
+                mtx_t lock;
+                cnd_t cond;
+                struct buffer *buf;
+                struct timespec start;
+                struct timespec stop;
+            } preapplied_damage;
         } workers;
 
         /* Last rendered cursor position */
@@ -714,6 +724,8 @@ struct terminal {
         } last_cursor;
 
         struct buffer *last_buf;     /* Buffer we rendered to last time */
+        size_t frames_since_last_immediate_release;
+        bool preapply_last_frame_damage;
 
         enum overlay_style last_overlay_style;
         struct buffer *last_overlay_buf;
@@ -982,6 +994,10 @@ void term_enable_size_notifications(struct terminal *term);
 void term_disable_size_notifications(struct terminal *term);
 void term_send_size_notification(struct terminal *term);
 
+void term_theme_switch_to_dark(struct terminal *term);
+void term_theme_switch_to_light(struct terminal *term);
+void term_theme_toggle(struct terminal *term);
+
 static inline void term_reset_grapheme_state(struct terminal *term)
 {
 #if defined(FOOT_GRAPHEME_CLUSTERING)

tests/test-config.c

@@ -399,6 +399,16 @@ test_color(struct context *ctx, bool (*parse_fun)(struct context *ctx),
                 BUG("[%s].%s=%s: failed to parse",
                     ctx->section, ctx->key, ctx->value);
             }
+
+            uint32_t color = input[i].color;
+            if (alpha_allowed && strlen(input[i].option_string) == 6)
+                color |= 0xff000000;
+
+            if (*ptr != color) {
+                BUG("[%s].%s=%s: expected 0x%08x, got 0x%08x",
+                    ctx->section, ctx->key, ctx->value,
+                    color, *ptr);
+            }
         }
     }
 }
@@ -445,6 +455,18 @@ test_two_colors(struct context *ctx, bool (*parse_fun)(struct context *ctx),
                 BUG("[%s].%s=%s: failed to parse",
                     ctx->section, ctx->key, ctx->value);
             }
+
+            if (*ptr1 != input[i].color1) {
+                BUG("[%s].%s=%s: expected 0x%08x, got 0x%08x",
+                    ctx->section, ctx->key, ctx->value,
+                    input[i].color1, *ptr1);
+            }
+
+            if (*ptr2 != input[i].color2) {
+                BUG("[%s].%s=%s: expected 0x%08x, got 0x%08x",
+                    ctx->section, ctx->key, ctx->value,
+                    input[i].color2, *ptr2);
+            }
         }
     }
 }
@@ -460,6 +482,7 @@ test_section_main(void)
     test_string(&ctx, &parse_section_main, "shell", &conf.shell);
     test_string(&ctx, &parse_section_main, "term", &conf.term);
     test_string(&ctx, &parse_section_main, "app-id", &conf.app_id);
+    test_string(&ctx, &parse_section_main, "toplevel-tag", &conf.toplevel_tag);
     test_string(&ctx, &parse_section_main, "utmp-helper", &conf.utmp_helper_path);
 
     test_c32string(&ctx, &parse_section_main, "word-delimiters", &conf.word_delimiters);
@@ -468,6 +491,8 @@ test_section_main(void)
     test_boolean(&ctx, &parse_section_main, "box-drawings-uses-font-glyphs", &conf.box_drawings_uses_font_glyphs);
     test_boolean(&ctx, &parse_section_main, "locked-title", &conf.locked_title);
     test_boolean(&ctx, &parse_section_main, "dpi-aware", &conf.dpi_aware);
+    test_boolean(&ctx, &parse_section_main, "gamma-correct-blending", &conf.gamma_correct);
+    test_boolean(&ctx, &parse_section_main, "uppercase-regex-insert", &conf.uppercase_regex_insert);
 
     test_pt_or_px(&ctx, &parse_section_main, "font-size-adjustment", &conf.font_size_adjustment.pt_or_px);  /* TODO: test ‘N%’ values too */
     test_pt_or_px(&ctx, &parse_section_main, "line-height", &conf.line_height);
@@ -496,6 +521,14 @@ test_section_main(void)
         (int []){STARTUP_WINDOWED, STARTUP_MAXIMIZED, STARTUP_FULLSCREEN},
         (int *)&conf.startup_mode);
 
+    test_enum(
+        &ctx, &parse_section_main, "initial-color-theme",
+        2,
+        (const char *[]){"dark", "light", "1", "2"},
+        (int []){COLOR_THEME_DARK, COLOR_THEME_LIGHT,
+                 COLOR_THEME_DARK, COLOR_THEME_LIGHT},
+        (int *)&conf.initial_color_theme);
+
     /* TODO: font (custom) */
     /* TODO: include (custom) */
     /* TODO: bold-text-in-bright (enum/boolean) */
@@ -670,69 +703,157 @@ test_section_touch(void)
 }
 
 static void
-test_section_colors(void)
+test_section_colors_dark(void)
 {
     struct config conf = {0};
     struct context ctx = {
-        .conf = &conf, .section = "colors", .path = "unittest"};
+        .conf = &conf, .section = "colors-dark", .path = "unittest"};
 
     test_invalid_key(&ctx, &parse_section_colors, "invalid-key");
 
-    test_color(&ctx, &parse_section_colors, "foreground", false, &conf.colors.fg);
-    test_color(&ctx, &parse_section_colors, "background", false, &conf.colors.bg);
-    test_color(&ctx, &parse_section_colors, "regular0", false, &conf.colors.table[0]);
-    test_color(&ctx, &parse_section_colors, "regular1", false, &conf.colors.table[1]);
-    test_color(&ctx, &parse_section_colors, "regular2", false, &conf.colors.table[2]);
-    test_color(&ctx, &parse_section_colors, "regular3", false, &conf.colors.table[3]);
-    test_color(&ctx, &parse_section_colors, "regular4", false, &conf.colors.table[4]);
-    test_color(&ctx, &parse_section_colors, "regular5", false, &conf.colors.table[5]);
-    test_color(&ctx, &parse_section_colors, "regular6", false, &conf.colors.table[6]);
-    test_color(&ctx, &parse_section_colors, "regular7", false, &conf.colors.table[7]);
-    test_color(&ctx, &parse_section_colors, "bright0", false, &conf.colors.table[8]);
-    test_color(&ctx, &parse_section_colors, "bright1", false, &conf.colors.table[9]);
-    test_color(&ctx, &parse_section_colors, "bright2", false, &conf.colors.table[10]);
-    test_color(&ctx, &parse_section_colors, "bright3", false, &conf.colors.table[11]);
-    test_color(&ctx, &parse_section_colors, "bright4", false, &conf.colors.table[12]);
-    test_color(&ctx, &parse_section_colors, "bright5", false, &conf.colors.table[13]);
-    test_color(&ctx, &parse_section_colors, "bright6", false, &conf.colors.table[14]);
-    test_color(&ctx, &parse_section_colors, "bright7", false, &conf.colors.table[15]);
-    test_color(&ctx, &parse_section_colors, "dim0", false, &conf.colors.dim[0]);
-    test_color(&ctx, &parse_section_colors, "dim1", false, &conf.colors.dim[1]);
-    test_color(&ctx, &parse_section_colors, "dim2", false, &conf.colors.dim[2]);
-    test_color(&ctx, &parse_section_colors, "dim3", false, &conf.colors.dim[3]);
-    test_color(&ctx, &parse_section_colors, "dim4", false, &conf.colors.dim[4]);
-    test_color(&ctx, &parse_section_colors, "dim5", false, &conf.colors.dim[5]);
-    test_color(&ctx, &parse_section_colors, "dim6", false, &conf.colors.dim[6]);
-    test_color(&ctx, &parse_section_colors, "dim7", false, &conf.colors.dim[7]);
-    test_color(&ctx, &parse_section_colors, "selection-foreground", false, &conf.colors.selection_fg);
-    test_color(&ctx, &parse_section_colors, "selection-background", false, &conf.colors.selection_bg);
-    test_color(&ctx, &parse_section_colors, "urls", false, &conf.colors.url);
-    test_two_colors(&ctx, &parse_section_colors, "jump-labels", false,
-                    &conf.colors.jump_label.fg,
-                    &conf.colors.jump_label.bg);
-    test_two_colors(&ctx, &parse_section_colors, "scrollback-indicator", false,
-                    &conf.colors.scrollback_indicator.fg,
-                    &conf.colors.scrollback_indicator.bg);
-    test_two_colors(&ctx, &parse_section_colors, "search-box-no-match", false,
-                    &conf.colors.search_box.no_match.fg,
-                    &conf.colors.search_box.no_match.bg);
-    test_two_colors(&ctx, &parse_section_colors, "search-box-match", false,
-                    &conf.colors.search_box.match.fg,
-                    &conf.colors.search_box.match.bg);
+    test_color(&ctx, &parse_section_colors_dark, "foreground", false, &conf.colors_dark.fg);
+    test_color(&ctx, &parse_section_colors_dark, "background", false, &conf.colors_dark.bg);
+    test_color(&ctx, &parse_section_colors_dark, "regular0", false, &conf.colors_dark.table[0]);
+    test_color(&ctx, &parse_section_colors_dark, "regular1", false, &conf.colors_dark.table[1]);
+    test_color(&ctx, &parse_section_colors_dark, "regular2", false, &conf.colors_dark.table[2]);
+    test_color(&ctx, &parse_section_colors_dark, "regular3", false, &conf.colors_dark.table[3]);
+    test_color(&ctx, &parse_section_colors_dark, "regular4", false, &conf.colors_dark.table[4]);
+    test_color(&ctx, &parse_section_colors_dark, "regular5", false, &conf.colors_dark.table[5]);
+    test_color(&ctx, &parse_section_colors_dark, "regular6", false, &conf.colors_dark.table[6]);
+    test_color(&ctx, &parse_section_colors_dark, "regular7", false, &conf.colors_dark.table[7]);
+    test_color(&ctx, &parse_section_colors_dark, "bright0", false, &conf.colors_dark.table[8]);
+    test_color(&ctx, &parse_section_colors_dark, "bright1", false, &conf.colors_dark.table[9]);
+    test_color(&ctx, &parse_section_colors_dark, "bright2", false, &conf.colors_dark.table[10]);
+    test_color(&ctx, &parse_section_colors_dark, "bright3", false, &conf.colors_dark.table[11]);
+    test_color(&ctx, &parse_section_colors_dark, "bright4", false, &conf.colors_dark.table[12]);
+    test_color(&ctx, &parse_section_colors_dark, "bright5", false, &conf.colors_dark.table[13]);
+    test_color(&ctx, &parse_section_colors_dark, "bright6", false, &conf.colors_dark.table[14]);
+    test_color(&ctx, &parse_section_colors_dark, "bright7", false, &conf.colors_dark.table[15]);
+    test_color(&ctx, &parse_section_colors_dark, "dim0", false, &conf.colors_dark.dim[0]);
+    test_color(&ctx, &parse_section_colors_dark, "dim1", false, &conf.colors_dark.dim[1]);
+    test_color(&ctx, &parse_section_colors_dark, "dim2", false, &conf.colors_dark.dim[2]);
+    test_color(&ctx, &parse_section_colors_dark, "dim3", false, &conf.colors_dark.dim[3]);
+    test_color(&ctx, &parse_section_colors_dark, "dim4", false, &conf.colors_dark.dim[4]);
+    test_color(&ctx, &parse_section_colors_dark, "dim5", false, &conf.colors_dark.dim[5]);
+    test_color(&ctx, &parse_section_colors_dark, "dim6", false, &conf.colors_dark.dim[6]);
+    test_color(&ctx, &parse_section_colors_dark, "dim7", false, &conf.colors_dark.dim[7]);
+    test_color(&ctx, &parse_section_colors_dark, "selection-foreground", false, &conf.colors_dark.selection_fg);
+    test_color(&ctx, &parse_section_colors_dark, "selection-background", false, &conf.colors_dark.selection_bg);
+    test_color(&ctx, &parse_section_colors_dark, "urls", false, &conf.colors_dark.url);
+    test_two_colors(&ctx, &parse_section_colors_dark, "jump-labels", false,
+                    &conf.colors_dark.jump_label.fg,
+                    &conf.colors_dark.jump_label.bg);
+    test_two_colors(&ctx, &parse_section_colors_dark, "scrollback-indicator", false,
+                    &conf.colors_dark.scrollback_indicator.fg,
+                    &conf.colors_dark.scrollback_indicator.bg);
+    test_two_colors(&ctx, &parse_section_colors_dark, "search-box-no-match", false,
+                    &conf.colors_dark.search_box.no_match.fg,
+                    &conf.colors_dark.search_box.no_match.bg);
+    test_two_colors(&ctx, &parse_section_colors_dark, "search-box-match", false,
+                    &conf.colors_dark.search_box.match.fg,
+                    &conf.colors_dark.search_box.match.bg);
 
-    test_enum(&ctx, &parse_section_colors, "alpha-mode", 3,
+    test_two_colors(&ctx, &parse_section_colors_dark, "cursor", false,
+                    &conf.colors_dark.cursor.text,
+                    &conf.colors_dark.cursor.cursor);
+
+    test_enum(&ctx, &parse_section_colors_dark, "alpha-mode", 3,
               (const char *[]){"default", "matching", "all"},
               (int []){ALPHA_MODE_DEFAULT, ALPHA_MODE_MATCHING, ALPHA_MODE_ALL},
-              (int *)&conf.colors.alpha_mode);
+              (int *)&conf.colors_dark.alpha_mode);
+
+    test_enum(&ctx, &parse_section_colors_dark, "dim-blend-towards", 2,
+              (const char *[]){"black", "white"},
+              (int []){DIM_BLEND_TOWARDS_BLACK, DIM_BLEND_TOWARDS_WHITE},
+              (int *)&conf.colors_dark.dim_blend_towards);
 
     for (size_t i = 0; i < 255; i++) {
         char key_name[4];
         sprintf(key_name, "%zu", i);
-        test_color(&ctx, &parse_section_colors, key_name, false,
-                   &conf.colors.table[i]);
+        test_color(&ctx, &parse_section_colors_dark, key_name, false,
+                   &conf.colors_dark.table[i]);
     }
 
-    test_invalid_key(&ctx, &parse_section_colors, "256");
+    test_invalid_key(&ctx, &parse_section_colors_dark, "256");
+
+    /* TODO: alpha (float in range 0-1, converted to uint16_t) */
+
+    config_free(&conf);
+}
+
+static void
+test_section_colors_light(void)
+{
+    struct config conf = {0};
+    struct context ctx = {
+        .conf = &conf, .section = "colors-light", .path = "unittest"};
+
+    test_invalid_key(&ctx, &parse_section_colors, "invalid-key");
+
+    test_color(&ctx, &parse_section_colors_light, "foreground", false, &conf.colors_light.fg);
+    test_color(&ctx, &parse_section_colors_light, "background", false, &conf.colors_light.bg);
+    test_color(&ctx, &parse_section_colors_light, "regular0", false, &conf.colors_light.table[0]);
+    test_color(&ctx, &parse_section_colors_light, "regular1", false, &conf.colors_light.table[1]);
+    test_color(&ctx, &parse_section_colors_light, "regular2", false, &conf.colors_light.table[2]);
+    test_color(&ctx, &parse_section_colors_light, "regular3", false, &conf.colors_light.table[3]);
+    test_color(&ctx, &parse_section_colors_light, "regular4", false, &conf.colors_light.table[4]);
+    test_color(&ctx, &parse_section_colors_light, "regular5", false, &conf.colors_light.table[5]);
+    test_color(&ctx, &parse_section_colors_light, "regular6", false, &conf.colors_light.table[6]);
+    test_color(&ctx, &parse_section_colors_light, "regular7", false, &conf.colors_light.table[7]);
+    test_color(&ctx, &parse_section_colors_light, "bright0", false, &conf.colors_light.table[8]);
+    test_color(&ctx, &parse_section_colors_light, "bright1", false, &conf.colors_light.table[9]);
+    test_color(&ctx, &parse_section_colors_light, "bright2", false, &conf.colors_light.table[10]);
+    test_color(&ctx, &parse_section_colors_light, "bright3", false, &conf.colors_light.table[11]);
+    test_color(&ctx, &parse_section_colors_light, "bright4", false, &conf.colors_light.table[12]);
+    test_color(&ctx, &parse_section_colors_light, "bright5", false, &conf.colors_light.table[13]);
+    test_color(&ctx, &parse_section_colors_light, "bright6", false, &conf.colors_light.table[14]);
+    test_color(&ctx, &parse_section_colors_light, "bright7", false, &conf.colors_light.table[15]);
+    test_color(&ctx, &parse_section_colors_light, "dim0", false, &conf.colors_light.dim[0]);
+    test_color(&ctx, &parse_section_colors_light, "dim1", false, &conf.colors_light.dim[1]);
+    test_color(&ctx, &parse_section_colors_light, "dim2", false, &conf.colors_light.dim[2]);
+    test_color(&ctx, &parse_section_colors_light, "dim3", false, &conf.colors_light.dim[3]);
+    test_color(&ctx, &parse_section_colors_light, "dim4", false, &conf.colors_light.dim[4]);
+    test_color(&ctx, &parse_section_colors_light, "dim5", false, &conf.colors_light.dim[5]);
+    test_color(&ctx, &parse_section_colors_light, "dim6", false, &conf.colors_light.dim[6]);
+    test_color(&ctx, &parse_section_colors_light, "dim7", false, &conf.colors_light.dim[7]);
+    test_color(&ctx, &parse_section_colors_light, "selection-foreground", false, &conf.colors_light.selection_fg);
+    test_color(&ctx, &parse_section_colors_light, "selection-background", false, &conf.colors_light.selection_bg);
+    test_color(&ctx, &parse_section_colors_light, "urls", false, &conf.colors_light.url);
+    test_two_colors(&ctx, &parse_section_colors_light, "jump-labels", false,
+                    &conf.colors_light.jump_label.fg,
+                    &conf.colors_light.jump_label.bg);
+    test_two_colors(&ctx, &parse_section_colors_light, "scrollback-indicator", false,
+                    &conf.colors_light.scrollback_indicator.fg,
+                    &conf.colors_light.scrollback_indicator.bg);
+    test_two_colors(&ctx, &parse_section_colors_light, "search-box-no-match", false,
+                    &conf.colors_light.search_box.no_match.fg,
+                    &conf.colors_light.search_box.no_match.bg);
+    test_two_colors(&ctx, &parse_section_colors_light, "search-box-match", false,
+                    &conf.colors_light.search_box.match.fg,
+                    &conf.colors_light.search_box.match.bg);
+
+    test_two_colors(&ctx, &parse_section_colors_light, "cursor", false,
+                    &conf.colors_light.cursor.text,
+                    &conf.colors_light.cursor.cursor);
+
+    test_enum(&ctx, &parse_section_colors_light, "alpha-mode", 3,
+              (const char *[]){"default", "matching", "all"},
+              (int []){ALPHA_MODE_DEFAULT, ALPHA_MODE_MATCHING, ALPHA_MODE_ALL},
+              (int *)&conf.colors_light.alpha_mode);
+
+    test_enum(&ctx, &parse_section_colors_light, "dim-blend-towards", 2,
+              (const char *[]){"black", "white"},
+              (int []){DIM_BLEND_TOWARDS_BLACK, DIM_BLEND_TOWARDS_WHITE},
+              (int *)&conf.colors_light.dim_blend_towards);
+
+    for (size_t i = 0; i < 255; i++) {
+        char key_name[4];
+        sprintf(key_name, "%zu", i);
+        test_color(&ctx, &parse_section_colors_light, key_name, false,
+                   &conf.colors_light.table[i]);
+    }
+
+    test_invalid_key(&ctx, &parse_section_colors_light, "256");
 
     /* TODO: alpha (float in range 0-1, converted to uint16_t) */
 
@@ -1385,6 +1506,9 @@ test_section_tweak(void)
     test_float(&ctx, &parse_section_tweak, "bold-text-in-bright-amount",
                &conf.bold_in_bright.amount);
 
+    test_uint32(&ctx, &parse_section_tweak, "min-stride-alignment",
+                &conf.tweak.min_stride_alignment);
+
 #if 0 /* Must be equal to, or less than INT32_MAX */
     test_uint32(&ctx, &parse_section_tweak, "max-shm-pool-size-mb",
                 &conf.tweak.max_shm_pool_size);
@@ -1407,7 +1531,8 @@ main(int argc, const char *const *argv)
     test_section_cursor();
     test_section_mouse();
     test_section_touch();
-    test_section_colors();
+    test_section_colors_dark();
+    test_section_colors_light();
     test_section_csd();
     test_section_key_bindings();
     test_section_key_bindings_collisions();

themes/aeroroot

@@ -1,10 +1,8 @@
 # -*- conf -*-
 # Aero root theme
 
-[cursor]
-color=1a1a1a 9fd5f5
-
-[colors]
+[colors-dark]
+cursor=1a1a1a 9fd5f5
 foreground=dedeef
 background=1a1a1a
 

themes/alacritty

@@ -1,10 +1,8 @@
 # -*- conf -*-
 # Alacritty
 
-[cursor]
-color = 181818 56d8c9
-
-[colors]
+[colors-dark]
+cursor = 181818 56d8c9
 background= 181818
 foreground= d8d8d8
 

themes/apprentice

@@ -1,10 +1,8 @@
 # -*- conf -*-
 # https://github.com/romainl/Apprentice
 
-[cursor]
-color=262626 6c6c6c
-
-[colors]
+[colors-dark]
+cursor=262626 6c6c6c
 foreground=bcbcbc
 background=262626
 regular0=1c1c1c

themes/ayu-mirage

@@ -2,10 +2,8 @@
 # theme: Ayu Mirage
 # description: a theme based on Ayu Mirage for Sublime Text (original: https://github.com/dempfi/ayu)
 
-[cursor]
-color =  ffcc66 665a44
-
-[colors]
+[colors-dark]
+cursor =  ffcc66 665a44
 foreground = cccac2
 background = 242936
 

themes/catppuccin-frappe

@@ -1,7 +1,7 @@
 # _*_ conf _*_
 # Catppuccin Frappe
 
-[colors]
+[colors-dark]
 foreground=c6d0f5
 background=303446
 
@@ -23,6 +23,11 @@ bright5=f4b8e4
 bright6=81c8be
 bright7=a5adce
 
+cursor=232634 f2d5cf
+
+16=ef9f76
+17=f2d5cf
+
 selection-foreground=c6d0f5
 selection-background=4f5369
 

themes/catppuccin-latte

@@ -1,7 +1,10 @@
 # _*_ conf _*_
 # Catppuccin Latte
 
-[colors]
+[main]
+initial-color-theme=light
+
+[colors-light]
 foreground=4c4f69
 background=eff1f5
 
@@ -23,6 +26,11 @@ bright5=ea76cb
 bright6=179299
 bright7=bcc0cc
 
+cursor=eff1f5 dc8a78
+
+16=fe640b
+17=dc8a78
+
 selection-foreground=4c4f69
 selection-background=ccced7
 

themes/catppuccin-macchiato

@@ -1,7 +1,7 @@
 # _*_ conf _*_
 # Catppuccin Macchiato
 
-[colors]
+[colors-dark]
 foreground=cad3f5
 background=24273a
 
@@ -23,6 +23,11 @@ bright5=f5bde6
 bright6=8bd5ca
 bright7=a5adcb
 
+cursor=181926 f4dbd6
+
+16=f5a97f
+17=f4dbd6
+
 selection-foreground=cad3f5
 selection-background=454a5f
 

themes/catppuccin-mocha

@@ -1,7 +1,7 @@
 # _*_ conf _*_
 # Catppuccin Mocha
 
-[colors]
+[colors-dark]
 foreground=cdd6f4
 background=1e1e2e
 
@@ -23,6 +23,11 @@ bright5=f5c2e7
 bright6=94e2d5
 bright7=a6adc8
 
+cursor=11111b f5e0dc
+
+16=fab387
+17=f5e0dc
+
 selection-foreground=cdd6f4
 selection-background=414356
 

themes/chiba-dark

@@ -3,10 +3,8 @@
 # author: ayushnix (https://sr.ht/~ayushnix)
 # description: A dark theme with bright cyberpunk colors (WCAG AAA compliant)
 
-[cursor]
-color = 181818 cdcdcd
-
-[colors]
+[colors-dark]
+cursor = 181818 cdcdcd
 foreground = cdcdcd
 background = 181818
 regular0 = 181818

themes/derp

@@ -1,10 +1,8 @@
 # -*- conf -*-
 # Derp
 
-[cursor]
-color=000000 ffffff
-
-[colors]
+[colors-dark]
+cursor=000000 ffffff
 foreground=ffffff
 background=000000
 regular0=111111

themes/deus

@@ -2,10 +2,8 @@
 # Deus
 # Color palette based on: https://github.com/ajmwagar/vim-deus
 
-[cursor]
-color=2c323b eaeaea
-
-[colors]
+[colors-dark]
+cursor=2c323b eaeaea
 background=2c323b
 foreground=eaeaea
 regular0=242a32

themes/dracula

@@ -1,10 +1,8 @@
 # -*- conf -*-
 # Dracula
 
-[cursor]
-color=282a36 f8f8f2
-
-[colors]
+[colors-dark]
+cursor=282a36 f8f8f2
 foreground=f8f8f2
 background=282a36
 regular0=000000  # black

themes/dracula-iterm

@@ -1,10 +1,8 @@
 # -*- conf -*-
 # Dracula iTerm2 variant
 
-[cursor]
-color=ffffff bbbbbb
-
-[colors]
+[colors-dark]
+cursor=ffffff bbbbbb
 foreground=f8f8f2
 background=1e1f29
 regular0=000000  # black

themes/electrophoretic

@@ -5,10 +5,11 @@
 # text and the white background.
 # author: Eugen Rahaian <eugen@rah.ro>
 
-[cursor]
-color=ffffff 515151
+[main]
+initial-color-theme=light
 
-[colors]
+[colors-light]
+cursor=ffffff 515151
 background= ffffff
 foreground= 000000
 

themes/gruvbox

@@ -0,0 +1,42 @@
+# -*- conf -*-
+# Gruvbox
+
+[colors-dark]
+background=282828
+foreground=ebdbb2
+regular0=282828
+regular1=cc241d
+regular2=98971a
+regular3=d79921
+regular4=458588
+regular5=b16286
+regular6=689d6a
+regular7=a89984
+bright0=928374
+bright1=fb4934
+bright2=b8bb26
+bright3=fabd2f
+bright4=83a598
+bright5=d3869b
+bright6=8ec07c
+bright7=ebdbb2
+
+[colors-light]
+background=fbf1c7
+foreground=3c3836
+regular0=fbf1c7
+regular1=cc241d
+regular2=98971a
+regular3=d79921
+regular4=458588
+regular5=b16286
+regular6=689d6a
+regular7=7c6f64
+bright0=928374
+bright1=9d0006
+bright2=79740e
+bright3=b57614
+bright4=076678
+bright5=8f3f71
+bright6=427b58
+bright7=3c3836

themes/gruvbox-dark

@@ -1,7 +1,7 @@
 # -*- conf -*-
 # Gruvbox
 
-[colors]
+[colors-dark]
 background=282828
 foreground=ebdbb2
 regular0=282828

themes/gruvbox-light

@@ -1,7 +1,10 @@
 # -*- conf -*-
 # Gruvbox - Light
 
-[colors]
+[main]
+initial-color-theme=light
+
+[colors-light]
 background=fbf1c7
 foreground=3c3836
 regular0=fbf1c7

themes/hacktober

@@ -1,8 +1,7 @@
 # -*- conf -*-
-[cursor]
-color=141414 c9c9c9
 
-[colors]
+[colors-dark]
+cursor=141414 c9c9c9
 foreground=c9c9c9
 background=141414
 regular0=191918   # black

themes/iterm

@@ -2,7 +2,7 @@
 # this foot theme is based on alacritty iterm theme:
 # https://github.com/alacritty/alacritty-theme/blob/master/themes/iterm.toml
 
-[colors]
+[colors-dark]
 foreground=fffbf6
 background=101421
 

themes/jetbrains-darcula

@@ -2,10 +2,8 @@
 # JetBrains Darcula
 # Palette based on the same theme from https://github.com/dexpota/kitty-themes
 
-[cursor]
-color=202020 ffffff
-
-[colors]
+[colors-dark]
+cursor=202020 ffffff
 background=202020
 foreground=adadad
 regular0=000000  # black

themes/kitty

@@ -1,9 +1,7 @@
 # -*- conf -*-
 
-[cursor]
-color=111111 cccccc
-
-[colors]
+[colors-dark]
+cursor=111111 cccccc
 foreground=dddddd
 background=000000
 regular0=000000  # black

themes/material-amber

@@ -2,10 +2,11 @@
 # Material Amber
 # Based on material.io guidelines with Amber 50 background
 
-[cursor]
-color=fff8e1 21201d
+[main]
+initial-color-theme=light
 
-[colors]
+[colors-light]
+cursor=fff8e1 21201d
 foreground = 21201d
 background = fff8e1
 

themes/material-design

@@ -2,7 +2,7 @@
 # Material
 # From https://github.com/MartinSeeler/iterm2-material-design
 
-[colors]
+[colors-dark]
 foreground=ECEFF1
 background=263238
 regular0=546E7A  # black

themes/modus-operandi

@@ -3,7 +3,11 @@
 # modus-operandi
 # See: https://protesilaos.com/emacs/modus-themes
 #
-[colors]
+
+[main]
+initial-color-theme=light
+
+[colors-light]
 background=ffffff
 foreground=000000
 regular0=000000
@@ -22,3 +26,5 @@ bright4=2544bb
 bright5=5317ac
 bright6=005a5f
 bright7=ffffff
+
+jump-labels=dce0e8 0000ff

themes/modus-vivendi

@@ -4,7 +4,7 @@
 # See: https://protesilaos.com/emacs/modus-themes
 #
 
-[colors]
+[colors-dark]
 background=000000
 foreground=ffffff
 regular0=000000

themes/modus-vivendi-tinted

@@ -0,0 +1,25 @@
+# -*- conf -*-
+#
+# modus-vivendi-tinted
+# See: https://protesilaos.com/emacs/modus-themes
+#
+
+[colors-dark]
+background=0d0e1c
+foreground=ffffff
+regular0=000000
+regular1=ff5f59
+regular2=44bc44
+regular3=d0bc00
+regular4=2fafff
+regular5=feacd0
+regular6=00d3d0
+regular7=a6a6a6
+bright0=595959
+bright1=ff6b55
+bright2=ff6b55
+bright3=fec43f
+bright4=fec43f
+bright5=b6a0ff
+bright6=6ae4b9
+bright7=777777

themes/molokai

@@ -2,7 +2,7 @@
 # Molokai
 # Based on zhou13's at https://github.com/zhou13/molokai-terminal/blob/master/xterm/Xresources
 
-[colors]
+[colors-dark]
 background=1B1D1E
 foreground=CCCCCC
 regular0=1B1D1E

themes/monokai-pro

@@ -1,7 +1,7 @@
 # -*- conf -*-
 # Monokai Pro
 
-[colors]
+[colors-dark]
 background=2D2A2E
 foreground=FCFCFA
 regular0=403E41

themes/moonfly

@@ -2,10 +2,8 @@
 # moonfly
 # Based on https://github.com/bluz71/vim-moonfly-colors
 
-[cursor]
-color = 080808 9e9e9e
-
-[colors]
+[colors-dark]
+cursor = 080808 9e9e9e
 foreground = b2b2b2
 background = 080808
 

themes/neon

@@ -6,7 +6,7 @@
 # https://xcolors.net/neon
 #
 
-[colors]
+[colors-dark]
 foreground=f8f8f8
 background=171717
 regular0=171717

themes/night-owl

@@ -1,10 +1,8 @@
 # _*_ conf _*_
 # Night Owl
 
-[cursor]
-color=011627 80a4c2
-
-[colors]
+[colors-dark]
+cursor=011627 80a4c2
 foreground=d6deeb
 background=011627
 

themes/nightfly

@@ -2,10 +2,8 @@
 # nightfly
 # Based on https://github.com/bluz71/vim-nightfly-guicolors
 
-[cursor]
-color = 080808 9ca1aa
-
-[colors]
+[colors-dark]
+cursor = 080808 9ca1aa
 foreground = acb4c2
 background = 011627
 

themes/noirblaze

@@ -3,10 +3,8 @@
 # https://github.com/n1ghtmare/noirblaze-kitty
 
 
-[cursor]
-color=121212 ff0088
-
-[colors]
+[colors-dark]
+cursor=121212 ff0088
 foreground=d5d5d5
 background=121212
 

themes/nord

@@ -6,10 +6,8 @@
 # this specific foot theme is based on nord-alacritty:
 # https://github.com/arcticicestudio/nord-alacritty/blob/develop/src/nord.yml
 
-[cursor]
-color = 2e3440 d8dee9
-
-[colors]
+[colors-dark]
+cursor = 2e3440 d8dee9
 foreground = d8dee9
 background = 2e3440
 

themes/nordiq

@@ -1,10 +1,8 @@
 # -*- conf -*-
 # Nordiq
 
-[cursor]
-color=eeeeee 9f515a
-
-[colors]
+[colors-dark]
+cursor=eeeeee 9f515a
 foreground=dbdee9
 background=0e1420
 regular0=5b6272

themes/nvim

@@ -0,0 +1,56 @@
+# -*- conf -*-
+# Neovim Dark theme
+# Uses the dark color palette from the default Neovim color scheme
+# See: https://github.com/neovim/neovim/blob/fb6c059dc55c8d594102937be4dd70f5ff51614a/src/nvim/highlight_group.c#L419
+
+[colors-dark]
+cursor=14161b e0e2ea # NvimDarkGrey2 NvimLightGrey2
+foreground=e0e2ea # NvimLightGrey2
+background=14161b # NvimDarkGrey2
+
+selection-foreground=e0e2ea # NvimLightGrey2
+selection-background=4f5258 # NvimDarkGrey4
+
+regular0=07080d # NvimDarkGrey1
+regular1=ffc0b9 # NvimLightRed
+regular2=b3f6c0 # NvimLightGreen
+regular3=fce094 # NvimLightYellow
+regular4=a6dbff # NvimLightBlue
+regular5=ffcaff # NvimLightMagenta
+regular6=8cf8f7 # NvimLightCyan
+regular7=c4c6cd # NvimLightGrey3
+
+bright0=2c2e33 # NvimDarkGrey3
+bright1=ffc0b9 # NvimLightRed
+bright2=b3f6c0 # NvimLightGreen
+bright3=fce094 # NvimLightYellow
+bright4=a6dbff # NvimLightBlue
+bright5=ffcaff # NvimLightMagenta
+bright6=8cf8f7 # NvimLightCyan
+bright7=eef1f8 # NvimLightGrey1
+
+[colors-light]
+cursor=e0e2ea 14161b # NvimLightGrey2 NvimDarkGrey2
+foreground=14161b # NvimDarkGrey2
+background=e0e2ea # NvimLightGrey2
+
+selection-foreground=14161b # NvimDarkGrey2
+selection-background=9b9ea4 # NvimLightGrey4
+
+regular0=eef1f8 # NvimLightGrey1
+regular1=590008 # NvimDarkRed
+regular2=005523 # NvimDarkGreen
+regular3=6b5300 # NvimDarkYellow
+regular4=004c73 # NvimDarkBlue
+regular5=470045 # NvimDarkMagenta
+regular6=007373 # NvimDarkCyan
+regular7=2c2e33 # NvimDarkGrey3
+
+bright0=c4c6cd # NvimLightGrey3
+bright1=590008 # NvimDarkRed
+bright2=005523 # NvimDarkGreen
+bright3=6b5300 # NvimDarkYellow
+bright4=004c73 # NvimDarkBlue
+bright5=470045 # NvimDarkMagenta
+bright6=007373 # NvimDarkCyan
+bright7=07080d # NvimDarkGrey1

themes/nvim-dark

@@ -3,10 +3,8 @@
 # Uses the dark color palette from the default Neovim color scheme
 # See: https://github.com/neovim/neovim/blob/fb6c059dc55c8d594102937be4dd70f5ff51614a/src/nvim/highlight_group.c#L419
 
-[cursor]
-color=14161b e0e2ea # NvimDarkGrey2 NvimLightGrey2
-
-[colors]
+[colors-dark]
+cursor=14161b e0e2ea # NvimDarkGrey2 NvimLightGrey2
 foreground=e0e2ea # NvimLightGrey2
 background=14161b # NvimDarkGrey2
 

themes/nvim-light

@@ -3,10 +3,11 @@
 # Uses the light color palette from the default Neovim color scheme
 # See: https://github.com/neovim/neovim/blob/fb6c059dc55c8d594102937be4dd70f5ff51614a/src/nvim/highlight_group.c#L334
 
-[cursor]
-color=e0e2ea 14161b # NvimLightGrey2 NvimDarkGrey2
+[main]
+initial-color-theme=light
 
-[colors]
+[colors-light]
+cursor=e0e2ea 14161b # NvimLightGrey2 NvimDarkGrey2
 foreground=14161b # NvimDarkGrey2
 background=e0e2ea # NvimLightGrey2
 

themes/onedark

@@ -1,10 +1,8 @@
 # OneDark
 # Palette based on the same theme from https://github.com/dexpota/kitty-themes
 
-[cursor]
-color=111111 cccccc
-
-[colors]
+[colors-dark]
+cursor=111111 cccccc
 foreground=979eab
 background=282c34
 regular0=282c34   # black

themes/onehalf-dark

@@ -7,10 +7,8 @@
 # + cursor colors from:
 # https://github.com/sonph/onehalf/blob/master/iterm/OneHalfDark.itermcolors
 
-[cursor]
-color=dcdfe4 a3b3cc
-
-[colors]
+[colors-dark]
+cursor=dcdfe4 a3b3cc
 foreground=dcdfe4
 background=282c34
 regular0=282c34   # black

themes/panda

@@ -1,7 +1,7 @@
 # -*- conf -*-
 # http://panda.siamak.me/
 
-[colors]
+[colors-dark]
 # alpha=1.0
 background=1D1E20
 foreground=F0F0F0

themes/paper-color

@@ -0,0 +1,49 @@
+# -*- conf -*-
+# PaperColorDark
+# Palette based on https://github.com/NLKNguyen/papercolor-theme
+
+[colors-dark]
+cursor=1c1c1c eeeeee
+background=1c1c1c
+foreground=eeeeee
+regular0=1c1c1c  # black
+regular1=af005f  # red
+regular2=5faf00  # green
+regular3=d7af5f  # yellow
+regular4=5fafd7  # blue
+regular5=808080  # magenta
+regular6=d7875f  # cyan
+regular7=d0d0d0  # white
+bright0=bcbcbc   # bright black
+bright1=5faf5f   # bright red
+bright2=afd700   # bright green
+bright3=af87d7   # bright yellow
+bright4=ffaf00   # bright blue
+bright5=ff5faf   # bright magenta
+bright6=00afaf   # bright cyan
+bright7=5f8787   # bright white
+# selection-foreground=1c1c1c
+# selection-background=af87d7
+
+[colors-light]
+cursor=eeeeee 444444
+background=eeeeee
+foreground=444444
+regular0=eeeeee  # black
+regular1=af0000  # red
+regular2=008700  # green
+regular3=5f8700  # yellow
+regular4=0087af  # blue
+regular5=878787  # magenta
+regular6=005f87  # cyan
+regular7=764e37  # white
+bright0=bcbcbc   # bright black
+bright1=d70000   # bright red
+bright2=d70087   # bright green
+bright3=8700af   # bright yellow
+bright4=d75f00   # bright blue
+bright5=d75f00   # bright magenta
+bright6=4c7a5d   # bright cyan
+bright7=005faf   # bright white
+# selection-foreground=eeeeee
+# selection-background=0087af