build: bump version to 0.2.1

Pass the whole new desired state to the backend, so that the
backend can leverage KMS atomic commits.

.builds/alpine.yml

@@ -1,35 +0,0 @@
-image: alpine/edge
-packages:
-  - eudev-dev
-  - mesa-dev
-  - meson
-  - libinput-dev
-  - libxkbcommon-dev
-  - pixman-dev
-  - scdoc
-  - wayland-dev
-  - wayland-protocols
-  - xcb-util-wm-dev
-  - xwayland
-sources:
-  - https://github.com/swaywm/wlroots
-  - https://github.com/Hjdskes/cage
-tasks:
-  # Install wlroots, which is required by Cage. Note that we compile a tagged
-  # version, instead of master, to avoid any breaking changes in wlroots.
-  - wlroots: |
-      cd wlroots
-      git checkout 0.14.0
-      meson --prefix=/usr build -Dexamples=false
-      ninja -C build
-      sudo ninja -C build install
-  - build: |
-      cd cage
-      meson build --werror -Dxwayland=true
-      ninja -C build
-      rm -rf build
-  - build-no-xwayland: |
-      cd cage
-      meson build --werror -Dxwayland=false
-      ninja -C build
-      rm -rf build

.builds/archlinux.yml

@@ -1,45 +0,0 @@
-image: archlinux
-packages:
-  - clang
-  - meson
-  - libinput
-  - libxkbcommon
-  - mesa
-  - scdoc
-  - wayland
-  - wayland-protocols
-  - xcb-util-wm
-  - xorg-xwayland
-sources:
-  - https://github.com/swaywm/wlroots
-  - https://github.com/Hjdskes/cage
-tasks:
-  # Install wlroots, which is required by Cage. Note that we compile a tagged
-  # version, instead of master, to avoid any breaking changes in wlroots.
-  - wlroots: |
-      cd wlroots
-      git checkout 0.14.0
-      meson --prefix=/usr build -Dexamples=false
-      ninja -C build
-      sudo ninja -C build install
-  - build: |
-      cd cage
-      meson build --werror -Dxwayland=true
-      ninja -C build
-      rm -rf build
-  - build-no-xwayland: |
-      cd cage
-      meson build --werror -Dxwayland=false
-      ninja -C build
-      rm -rf build
-  - scan-build: |
-      cd cage
-      CC=clang meson build --werror -Dxwayland=true
-      CC=clang ninja -C build scan-build
-      rm -rf build
-  - clang-format: |
-      cd cage
-      meson build --werror -Dxwayland=true
-      ninja -C build clang-format
-      rm -rf build
-      git diff --exit-code

.builds/freebsd.yml

@@ -1,37 +0,0 @@
-image: freebsd/latest
-packages:
-  - devel/evdev-proto
-  - devel/meson
-  - devel/libepoll-shim
-  - devel/pkgconf
-  - graphics/mesa-libs
-  - graphics/wayland
-  - graphics/wayland-protocols
-  - textproc/scdoc
-  - x11/libinput
-  - x11/libxkbcommon
-  - x11/pixman
-  - x11/xcb-util-wm
-  - x11-servers/xwayland
-sources:
-  - https://github.com/swaywm/wlroots
-  - https://github.com/Hjdskes/cage
-tasks:
-  # Install wlroots, which is required by Cage. Note that we compile a tagged
-  # version, instead of master, to avoid any breaking changes in wlroots.
-  - wlroots: |
-      cd wlroots
-      git checkout 0.14.0
-      meson --prefix=/usr/local build -Dexamples=false
-      ninja -C build
-      sudo ninja -C build install
-  - build: |
-      cd cage
-      PKG_CONFIG_PATH=/usr/local/lib/pkgconfig meson build --werror -Dxwayland=true
-      PKG_CONFIG_PATH=/usr/local/lib/pkgconfig ninja -C build
-      rm -rf build
-  - build-no-xwayland: |
-      cd cage
-      PKG_CONFIG_PATH=/usr/local/lib/pkgconfig meson build --werror -Dxwayland=false
-      PKG_CONFIG_PATH=/usr/local/lib/pkgconfig ninja -C build
-      rm -rf build

.clang-format-ignore

@@ -0,0 +1 @@
+subprojects/**/*

.editorconfig

@@ -0,0 +1,10 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+trim_trailing_whitespace = true
+insert_final_newline = true
+indent_style = tab
+indent_size = 8
+max_line_length = 120

.github/workflows/main.yml

@@ -0,0 +1,81 @@
+name: Continuous integration build
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+env:
+  WLROOTS_VERSION: 0.19
+
+jobs:
+  compile:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        CC: [ gcc, clang ]
+        OS: [ "alpine:edge", "archlinux:base-devel" ]
+        xwayland: [ enabled, disabled ]
+    container: ${{ matrix.OS }}
+    env:
+      CC: ${{ matrix.CC }}
+    steps:
+      - name: Checkout Cage
+        uses: actions/checkout@v2
+
+      - name: Install dependencies (Alpine)
+        if: "matrix.OS == 'alpine:edge'"
+        run: apk add build-base xcb-util-wm-dev libseat-dev clang git eudev-dev mesa-dev libdrm-dev libinput-dev libxkbcommon-dev pixman-dev wayland-dev meson wayland-protocols xwayland-dev scdoc-doc hwdata libdisplay-info-dev
+
+      - name: Install dependencies (Arch)
+        if: "matrix.OS == 'archlinux:base-devel'"
+        run: |
+          pacman-key --init
+          pacman -Syu --noconfirm xcb-util-wm seatd git clang meson libinput libdrm mesa libxkbcommon wayland wayland-protocols xorg-server-xwayland scdoc libdisplay-info
+
+      - name: Fetch wlroots as a subproject
+        run: git clone https://gitlab.freedesktop.org/wlroots/wlroots.git subprojects/wlroots -b $WLROOTS_VERSION
+
+      - name: Compile Cage (XWayland=${{ matrix.xwayland }})
+        run: |
+          meson --fatal-meson-warnings --wrap-mode=nodownload \
+            build-${{ matrix.CC }}-${{matrix.xwayland }} \
+            -Dwlroots:xwayland=${{ matrix.xwayland }}
+          ninja -C build-${{ matrix.CC }}-${{matrix.xwayland }}
+
+  format:
+    runs-on: ubuntu-latest
+    container: "archlinux:base-devel"
+    steps:
+      - name: Checkout Cage
+        uses: actions/checkout@v2
+      - name: Install dependencies
+        run: |
+          pacman-key --init
+          pacman -Syu --noconfirm xcb-util-wm seatd git clang meson libinput libdrm mesa libxkbcommon wayland wayland-protocols xorg-server-xwayland scdoc hwdata libdisplay-info
+      - name: Fetch wlroots as a subproject
+        run: git clone https://gitlab.freedesktop.org/wlroots/wlroots.git subprojects/wlroots -b $WLROOTS_VERSION
+      - name: Check for formatting changes
+        run: |
+          meson --wrap-mode=nodownload build-clang-format -Dwlroots:xwayland=enabled
+          ninja -C build-clang-format clang-format-check
+
+  scan-build:
+    runs-on: ubuntu-latest
+    container: "archlinux:base-devel"
+    env:
+      CC: clang
+    steps:
+      - name: Checkout Cage
+        uses: actions/checkout@v2
+      - name: Install dependencies
+        run: |
+          pacman-key --init
+          pacman -Syu --noconfirm xcb-util-wm seatd git clang meson libinput libdrm mesa libxkbcommon wayland wayland-protocols xorg-server-xwayland scdoc hwdata libdisplay-info
+      - name: Fetch wlroots as a subproject
+        run: git clone https://gitlab.freedesktop.org/wlroots/wlroots.git subprojects/wlroots -b $WLROOTS_VERSION
+      - name: Run scan-build
+        run: |
+          meson --wrap-mode=nodownload build-scan-build -Dwlroots:xwayland=enabled
+          ninja -C build-scan-build scan-build

README.md

@@ -1,4 +1,4 @@
-# Cage: a Wayland kiosk [![builds.sr.ht status](https://builds.sr.ht/~hjdskes.svg)](https://builds.sr.ht/~hjdskes?)
+# Cage: a Wayland kiosk
 
 <img src="https://www.hjdskes.nl/img/projects/cage/cage.svg" alt="Cage's logo" width="150px" align="right">
 
@@ -8,57 +8,54 @@ application.
 This README is only relevant for development resources and instructions. For a
 description of Cage and installation instructions for end-users, please see
 [its project page](https://www.hjdskes.nl/projects/cage) and [the
-Wiki](https://github.com/Hjdskes/cage/wiki/).
+Wiki](https://github.com/cage-kiosk/cage/wiki/).
+See [the man page](./cage.1.scd) for a list of possible environment variables and run options.
 
 ## Release signatures
 
-Releases are signed with
-[6EBC43B1](http://keys.gnupg.net/pks/lookup?op=vindex&fingerprint=on&search=0x37C445296EBC43B1)
-and published on [GitHub](https://github.com/Hjdskes/cage/releases).
+Releases up to version 0.1.4 are signed with [6EBC43B1](http://keys.gnupg.net/pks/lookup?op=vindex&fingerprint=on&search=0x37C445296EBC43B1). Releases from 0.1.5 onwards are signed with
+[E88F5E48](https://keys.openpgp.org/search?q=34FF9526CFEF0E97A340E2E40FDE7BE0E88F5E48)
+All releases are published on [GitHub](https://github.com/cage-kiosk/cage/releases).
 
 ## Building and running Cage
 
 You can build Cage with the [meson](https://mesonbuild.com/) build system. It
 requires wayland, wlroots, and xkbcommon to be installed. Optionally, install
-scdoc for manual pages. Note that Cage is developed against the latest tag of
-wlroots, in order to not constantly chase breaking changes as soon as they
-occur.
+scdoc for manual pages. Cage is currently based on branch 0.18 of wlroots.
 
 Simply execute the following steps to build Cage:
 
 ```
-$ meson build
-$ ninja -C build
+$ meson setup build
+$ meson compile -C build
 ```
 
 By default, this builds a debug build. To build a release build, use `meson
-build --buildtype=release`.
+setup build --buildtype=release`.
 
-Cage comes with compile-time support for XWayland. To enable this,
-first make sure that your version of wlroots is compiled with this
-option. Then, add `-Dxwayland=true` to the `meson` command above. Note
-that you'll need to have the XWayland binary installed on your system
-for this to work.
+Cage comes with compile-time support for XWayland. To enable this, make sure
+that your version of wlroots is compiled with this option. Note that you'll
+need to have the XWayland binary installed on your system for this to work.
 
 You can run Cage by running `./build/cage APPLICATION`. If you run it from
 within an existing X11 or Wayland session, it will open in a virtual output as
 a window in your existing session. If you run it at a TTY, it'll run with the
 KMS+DRM backend. In debug mode (default build type with Meson), press
 <kbd>Alt</kbd>+<kbd>Esc</kbd> to quit. For more configuration options, see
-[Configuration](https://github.com/Hjdskes/cage/wiki/Configuration).
+[Configuration](https://github.com/cage-kiosk/cage/wiki/Configuration).
 
 Cage is based on the annotated source of tinywl and rootston.
 
 ## Bugs
 
 For any bug, please [create an
-issue](https://github.com/Hjdskes/cage/issues/new) on
-[GitHub](https://github.com/Hjdskes/cage).
+issue](https://github.com/cage-kiosk/cage/issues/new) on
+[GitHub](https://github.com/cage-kiosk/cage).
 
 ## License
 
 Please see
-[LICENSE](https://github.com/Hjdskes/cage/blob/master/LICENSE) on
-[GitHub](https://github.com/Hjdskes/cage).
+[LICENSE](https://github.com/cage-kiosk/cage/blob/master/LICENSE) on
+[GitHub](https://github.com/cage-kiosk/cage).
 
 Copyright © 2018-2020 Jente Hidskes <dev@hjdskes.nl>

cage.1.scd

@@ -6,7 +6,7 @@ cage - a Wayland kiosk compositor
 
 # SYNOPSIS
 
-*cage* [-dhmrsv] [--] _application_ [application argument ...]
+*cage* [options...] [--] [_application_...]
 
 # DESCRIPTION
 
@@ -19,6 +19,9 @@ activities outside the scope of the running application are prevented.
 *-d*
 	Don't draw client side decorations when possible.
 
+*-D*
+	Enable debug logging.
+
 *-h*
 	Show the help message.
 
@@ -27,10 +30,6 @@ activities outside the scope of the running application are prevented.
 	*last* Cage uses only the last connected monitor.
 	*extend* Cage extends the display across all connected monitors.
 
-*-r*
-	Rotate the output 90 degrees clockwise. This can be specified up to three
-	times, each resulting in an additional 90 degrees clockwise rotation.
-
 *-s*
 	Allow VT switching
 
@@ -65,7 +64,7 @@ _XKB_DEFAULT_VARIANT_, _XKB_DEFAULT_OPTIONS_
 
 # BUGS
 
-Report bugs at https://github.com/Hjdskes/cage
+Report bugs at https://github.com/cage-kiosk/cage
 
 # AUTHORS
 

cage.c

@@ -19,16 +19,27 @@
 #include <unistd.h>
 #include <wayland-server-core.h>
 #include <wlr/backend.h>
+#include <wlr/render/allocator.h>
 #include <wlr/render/wlr_renderer.h>
 #include <wlr/types/wlr_compositor.h>
 #include <wlr/types/wlr_data_device.h>
 #include <wlr/types/wlr_export_dmabuf_v1.h>
 #include <wlr/types/wlr_gamma_control_v1.h>
-#include <wlr/types/wlr_idle.h>
 #include <wlr/types/wlr_idle_inhibit_v1.h>
+#include <wlr/types/wlr_idle_notify_v1.h>
 #include <wlr/types/wlr_output_layout.h>
+#include <wlr/types/wlr_output_management_v1.h>
+#include <wlr/types/wlr_presentation_time.h>
+#include <wlr/types/wlr_primary_selection_v1.h>
+#include <wlr/types/wlr_relative_pointer_v1.h>
+#include <wlr/types/wlr_scene.h>
 #include <wlr/types/wlr_screencopy_v1.h>
 #include <wlr/types/wlr_server_decoration.h>
+#include <wlr/types/wlr_single_pixel_buffer_v1.h>
+#include <wlr/types/wlr_subcompositor.h>
+#include <wlr/types/wlr_viewporter.h>
+#include <wlr/types/wlr_virtual_keyboard_v1.h>
+#include <wlr/types/wlr_virtual_pointer_v1.h>
 #if CAGE_HAS_XWAYLAND
 #include <wlr/types/wlr_xcursor_manager.h>
 #endif
@@ -50,10 +61,28 @@
 #include "xwayland.h"
 #endif
 
+void
+server_terminate(struct cg_server *server)
+{
+	// Workaround for https://gitlab.freedesktop.org/wayland/wayland/-/merge_requests/421
+	if (server->terminated) {
+		return;
+	}
+
+	wl_display_terminate(server->wl_display);
+}
+
+static void
+handle_display_destroy(struct wl_listener *listener, void *data)
+{
+	struct cg_server *server = wl_container_of(listener, server, display_destroy);
+	server->terminated = true;
+}
+
 static int
 sigchld_handler(int fd, uint32_t mask, void *data)
 {
-	struct wl_display *display = data;
+	struct cg_server *server = data;
 
 	/* Close Cage's read pipe. */
 	close(fd);
@@ -64,7 +93,8 @@ sigchld_handler(int fd, uint32_t mask, void *data)
 		wlr_log(WLR_DEBUG, "Connection closed by server");
 	}
 
-	wl_display_terminate(display);
+	server->return_app_code = true;
+	server_terminate(server);
 	return 0;
 }
 
@@ -88,7 +118,7 @@ set_cloexec(int fd)
 }
 
 static bool
-spawn_primary_client(struct wl_display *display, char *argv[], pid_t *pid_out, struct wl_event_source **sigchld_source)
+spawn_primary_client(struct cg_server *server, char *argv[], pid_t *pid_out, struct wl_event_source **sigchld_source)
 {
 	int fd[2];
 	if (pipe(fd) != 0) {
@@ -104,6 +134,8 @@ spawn_primary_client(struct wl_display *display, char *argv[], pid_t *pid_out, s
 		/* Close read, we only need write in the primary client process. */
 		close(fd[0]);
 		execvp(argv[0], argv);
+		/* execvp() returns only on failure */
+		wlr_log_errno(WLR_ERROR, "Failed to spawn client");
 		_exit(1);
 	} else if (pid == -1) {
 		wlr_log_errno(WLR_ERROR, "Unable to fork");
@@ -120,15 +152,15 @@ spawn_primary_client(struct wl_display *display, char *argv[], pid_t *pid_out, s
 	/* Close write, we only need read in Cage. */
 	close(fd[1]);
 
-	struct wl_event_loop *event_loop = wl_display_get_event_loop(display);
+	struct wl_event_loop *event_loop = wl_display_get_event_loop(server->wl_display);
 	uint32_t mask = WL_EVENT_HANGUP | WL_EVENT_ERROR;
-	*sigchld_source = wl_event_loop_add_fd(event_loop, fd[0], mask, sigchld_handler, display);
+	*sigchld_source = wl_event_loop_add_fd(event_loop, fd[0], mask, sigchld_handler, server);
 
 	wlr_log(WLR_DEBUG, "Child process created with pid %d", pid);
 	return true;
 }
 
-static void
+static int
 cleanup_primary_client(pid_t pid)
 {
 	int status;
@@ -137,15 +169,25 @@ cleanup_primary_client(pid_t pid)
 
 	if (WIFEXITED(status)) {
 		wlr_log(WLR_DEBUG, "Child exited normally with exit status %d", WEXITSTATUS(status));
+		return WEXITSTATUS(status);
 	} else if (WIFSIGNALED(status)) {
+		/* Mimic Bash and other shells for the exit status */
 		wlr_log(WLR_DEBUG, "Child was terminated by a signal (%d)", WTERMSIG(status));
+		return 128 + WTERMSIG(status);
 	}
+
+	return 0;
 }
 
 static bool
 drop_permissions(void)
 {
+	if (getuid() == 0 || getgid() == 0) {
+		wlr_log(WLR_INFO, "Running as root user, this is dangerous");
+		return true;
+	}
 	if (getuid() != geteuid() || getgid() != getegid()) {
+		wlr_log(WLR_INFO, "setuid/setgid bit detected, dropping permissions");
 		// Set the gid and uid in the correct order.
 		if (setgid(getgid()) != 0 || setuid(getuid()) != 0) {
 			wlr_log(WLR_ERROR, "Unable to drop root, refusing to start");
@@ -165,13 +207,13 @@ drop_permissions(void)
 static int
 handle_signal(int signal, void *data)
 {
-	struct wl_display *display = data;
+	struct cg_server *server = data;
 
 	switch (signal) {
 	case SIGINT:
 		/* Fallthrough */
 	case SIGTERM:
-		wl_display_terminate(display);
+		server_terminate(server);
 		return 0;
 	default:
 		return 0;
@@ -182,16 +224,13 @@ static void
 usage(FILE *file, const char *cage)
 {
 	fprintf(file,
-		"Usage: %s [OPTIONS] [--] APPLICATION\n"
+		"Usage: %s [OPTIONS] [--] [APPLICATION...]\n"
 		"\n"
 		" -d\t Don't draw client side decorations, when possible\n"
-#ifdef DEBUG
-		" -D\t Turn on damage tracking debugging\n"
-#endif
+		" -D\t Enable debug logging\n"
 		" -h\t Display this help message\n"
 		" -m extend Extend the display across all connected outputs (default)\n"
 		" -m last Use only the last connected output\n"
-		" -r\t Rotate the output 90 degrees clockwise, specify up to three times\n"
 		" -s\t Allow VT switching\n"
 		" -v\t Show the version number and exit\n"
 		"\n"
@@ -203,20 +242,14 @@ static bool
 parse_args(struct cg_server *server, int argc, char *argv[])
 {
 	int c;
-#ifdef DEBUG
-	while ((c = getopt(argc, argv, "dDhm:rsv")) != -1) {
-#else
-	while ((c = getopt(argc, argv, "dhm:rsv")) != -1) {
-#endif
+	while ((c = getopt(argc, argv, "dDhm:sv")) != -1) {
 		switch (c) {
 		case 'd':
 			server->xdg_decoration = true;
 			break;
-#ifdef DEBUG
 		case 'D':
-			server->debug_damage_tracking = true;
+			server->log_level = WLR_DEBUG;
 			break;
-#endif
 		case 'h':
 			usage(stdout, argv[0]);
 			return false;
@@ -227,12 +260,6 @@ parse_args(struct cg_server *server, int argc, char *argv[])
 				server->output_mode = CAGE_MULTI_OUTPUT_MODE_EXTEND;
 			}
 			break;
-		case 'r':
-			server->output_transform++;
-			if (server->output_transform > WL_OUTPUT_TRANSFORM_270) {
-				server->output_transform = WL_OUTPUT_TRANSFORM_NORMAL;
-			}
-			break;
 		case 's':
 			server->allow_vt_switch = true;
 			break;
@@ -245,48 +272,26 @@ parse_args(struct cg_server *server, int argc, char *argv[])
 		}
 	}
 
-	if (optind >= argc) {
-		usage(stderr, argv[0]);
-		return false;
-	}
-
 	return true;
 }
 
 int
 main(int argc, char *argv[])
 {
-	struct cg_server server = {0};
-	struct wl_event_loop *event_loop = NULL;
-	struct wl_event_source *sigint_source = NULL;
-	struct wl_event_source *sigterm_source = NULL;
+	struct cg_server server = {.log_level = WLR_INFO};
 	struct wl_event_source *sigchld_source = NULL;
-	struct wlr_renderer *renderer = NULL;
-	struct wlr_compositor *compositor = NULL;
-	struct wlr_data_device_manager *data_device_manager = NULL;
-	struct wlr_server_decoration_manager *server_decoration_manager = NULL;
-	struct wlr_xdg_decoration_manager_v1 *xdg_decoration_manager = NULL;
-	struct wlr_export_dmabuf_manager_v1 *export_dmabuf_manager = NULL;
-	struct wlr_screencopy_manager_v1 *screencopy_manager = NULL;
-	struct wlr_xdg_output_manager_v1 *output_manager = NULL;
-	struct wlr_gamma_control_manager_v1 *gamma_control_manager = NULL;
-	struct wlr_xdg_shell *xdg_shell = NULL;
-#if CAGE_HAS_XWAYLAND
-	struct wlr_xwayland *xwayland = NULL;
-	struct wlr_xcursor_manager *xcursor_manager = NULL;
-#endif
 	pid_t pid = 0;
-	int ret = 0;
+	int ret = 0, app_ret = 0;
+
+#ifdef DEBUG
+	server.log_level = WLR_DEBUG;
+#endif
 
 	if (!parse_args(&server, argc, argv)) {
 		return 1;
 	}
 
-#ifdef DEBUG
-	wlr_log_init(WLR_DEBUG, NULL);
-#else
-	wlr_log_init(WLR_ERROR, NULL);
-#endif
+	wlr_log_init(server.log_level, NULL);
 
 	/* Wayland requires XDG_RUNTIME_DIR to be set. */
 	if (!getenv("XDG_RUNTIME_DIR")) {
@@ -300,11 +305,14 @@ main(int argc, char *argv[])
 		return 1;
 	}
 
-	event_loop = wl_display_get_event_loop(server.wl_display);
-	sigint_source = wl_event_loop_add_signal(event_loop, SIGINT, handle_signal, &server.wl_display);
-	sigterm_source = wl_event_loop_add_signal(event_loop, SIGTERM, handle_signal, &server.wl_display);
+	server.display_destroy.notify = handle_display_destroy;
+	wl_display_add_destroy_listener(server.wl_display, &server.display_destroy);
 
-	server.backend = wlr_backend_autocreate(server.wl_display);
+	struct wl_event_loop *event_loop = wl_display_get_event_loop(server.wl_display);
+	struct wl_event_source *sigint_source = wl_event_loop_add_signal(event_loop, SIGINT, handle_signal, &server);
+	struct wl_event_source *sigterm_source = wl_event_loop_add_signal(event_loop, SIGTERM, handle_signal, &server);
+
+	server.backend = wlr_backend_autocreate(event_loop, &server.session);
 	if (!server.backend) {
 		wlr_log(WLR_ERROR, "Unable to create the wlroots backend");
 		ret = 1;
@@ -316,33 +324,68 @@ main(int argc, char *argv[])
 		goto end;
 	}
 
-	renderer = wlr_backend_get_renderer(server.backend);
-	wlr_renderer_init_wl_display(renderer, server.wl_display);
+	server.renderer = wlr_renderer_autocreate(server.backend);
+	if (!server.renderer) {
+		wlr_log(WLR_ERROR, "Unable to create the wlroots renderer");
+		ret = 1;
+		goto end;
+	}
+
+	server.allocator = wlr_allocator_autocreate(server.backend, server.renderer);
+	if (!server.allocator) {
+		wlr_log(WLR_ERROR, "Unable to create the wlroots allocator");
+		ret = 1;
+		goto end;
+	}
+
+	wlr_renderer_init_wl_display(server.renderer, server.wl_display);
 
 	wl_list_init(&server.views);
 	wl_list_init(&server.outputs);
 
-	server.output_layout = wlr_output_layout_create();
+	server.output_layout = wlr_output_layout_create(server.wl_display);
 	if (!server.output_layout) {
 		wlr_log(WLR_ERROR, "Unable to create output layout");
 		ret = 1;
 		goto end;
 	}
+	server.output_layout_change.notify = handle_output_layout_change;
+	wl_signal_add(&server.output_layout->events.change, &server.output_layout_change);
 
-	compositor = wlr_compositor_create(server.wl_display, renderer);
+	server.scene = wlr_scene_create();
+	if (!server.scene) {
+		wlr_log(WLR_ERROR, "Unable to create scene");
+		ret = 1;
+		goto end;
+	}
+
+	server.scene_output_layout = wlr_scene_attach_output_layout(server.scene, server.output_layout);
+
+	struct wlr_compositor *compositor = wlr_compositor_create(server.wl_display, 6, server.renderer);
 	if (!compositor) {
 		wlr_log(WLR_ERROR, "Unable to create the wlroots compositor");
 		ret = 1;
 		goto end;
 	}
 
-	data_device_manager = wlr_data_device_manager_create(server.wl_display);
-	if (!data_device_manager) {
+	if (!wlr_subcompositor_create(server.wl_display)) {
+		wlr_log(WLR_ERROR, "Unable to create the wlroots subcompositor");
+		ret = 1;
+		goto end;
+	}
+
+	if (!wlr_data_device_manager_create(server.wl_display)) {
 		wlr_log(WLR_ERROR, "Unable to create the data device manager");
 		ret = 1;
 		goto end;
 	}
 
+	if (!wlr_primary_selection_v1_device_manager_create(server.wl_display)) {
+		wlr_log(WLR_ERROR, "Unable to create primary selection device manager");
+		ret = 1;
+		goto end;
+	}
+
 	/* Configure a listener to be notified when new outputs are
 	 * available on the backend. We use this only to detect the
 	 * first output and ignore subsequent outputs. */
@@ -356,7 +399,7 @@ main(int argc, char *argv[])
 		goto end;
 	}
 
-	server.idle = wlr_idle_create(server.wl_display);
+	server.idle = wlr_idle_notifier_v1_create(server.wl_display);
 	if (!server.idle) {
 		wlr_log(WLR_ERROR, "Unable to create the idle tracker");
 		ret = 1;
@@ -373,16 +416,19 @@ main(int argc, char *argv[])
 	wl_signal_add(&server.idle_inhibit_v1->events.new_inhibitor, &server.new_idle_inhibitor_v1);
 	wl_list_init(&server.inhibitors);
 
-	xdg_shell = wlr_xdg_shell_create(server.wl_display);
+	struct wlr_xdg_shell *xdg_shell = wlr_xdg_shell_create(server.wl_display, 5);
 	if (!xdg_shell) {
 		wlr_log(WLR_ERROR, "Unable to create the XDG shell interface");
 		ret = 1;
 		goto end;
 	}
-	server.new_xdg_shell_surface.notify = handle_xdg_shell_surface_new;
-	wl_signal_add(&xdg_shell->events.new_surface, &server.new_xdg_shell_surface);
+	server.new_xdg_toplevel.notify = handle_new_xdg_toplevel;
+	wl_signal_add(&xdg_shell->events.new_toplevel, &server.new_xdg_toplevel);
+	server.new_xdg_popup.notify = handle_new_xdg_popup;
+	wl_signal_add(&xdg_shell->events.new_popup, &server.new_xdg_popup);
 
-	xdg_decoration_manager = wlr_xdg_decoration_manager_v1_create(server.wl_display);
+	struct wlr_xdg_decoration_manager_v1 *xdg_decoration_manager =
+		wlr_xdg_decoration_manager_v1_create(server.wl_display);
 	if (!xdg_decoration_manager) {
 		wlr_log(WLR_ERROR, "Unable to create the XDG decoration manager");
 		ret = 1;
@@ -391,7 +437,8 @@ main(int argc, char *argv[])
 	wl_signal_add(&xdg_decoration_manager->events.new_toplevel_decoration, &server.xdg_toplevel_decoration);
 	server.xdg_toplevel_decoration.notify = handle_xdg_toplevel_decoration;
 
-	server_decoration_manager = wlr_server_decoration_manager_create(server.wl_display);
+	struct wlr_server_decoration_manager *server_decoration_manager =
+		wlr_server_decoration_manager_create(server.wl_display);
 	if (!server_decoration_manager) {
 		wlr_log(WLR_ERROR, "Unable to create the server decoration manager");
 		ret = 1;
@@ -401,65 +448,117 @@ main(int argc, char *argv[])
 		server_decoration_manager, server.xdg_decoration ? WLR_SERVER_DECORATION_MANAGER_MODE_SERVER
 								 : WLR_SERVER_DECORATION_MANAGER_MODE_CLIENT);
 
-	export_dmabuf_manager = wlr_export_dmabuf_manager_v1_create(server.wl_display);
-	if (!export_dmabuf_manager) {
+	if (!wlr_viewporter_create(server.wl_display)) {
+		wlr_log(WLR_ERROR, "Unable to create the viewporter interface");
+		ret = 1;
+		goto end;
+	}
+
+	struct wlr_presentation *presentation = wlr_presentation_create(server.wl_display, server.backend, 2);
+	if (!presentation) {
+		wlr_log(WLR_ERROR, "Unable to create the presentation interface");
+		ret = 1;
+		goto end;
+	}
+
+	if (!wlr_export_dmabuf_manager_v1_create(server.wl_display)) {
 		wlr_log(WLR_ERROR, "Unable to create the export DMABUF manager");
 		ret = 1;
 		goto end;
 	}
 
-	screencopy_manager = wlr_screencopy_manager_v1_create(server.wl_display);
-	if (!screencopy_manager) {
+	if (!wlr_screencopy_manager_v1_create(server.wl_display)) {
 		wlr_log(WLR_ERROR, "Unable to create the screencopy manager");
 		ret = 1;
 		goto end;
 	}
 
-	output_manager = wlr_xdg_output_manager_v1_create(server.wl_display, server.output_layout);
-	if (!output_manager) {
+	if (!wlr_single_pixel_buffer_manager_v1_create(server.wl_display)) {
+		wlr_log(WLR_ERROR, "Unable to create the single pixel buffer manager");
+		ret = 1;
+		goto end;
+	}
+
+	if (!wlr_xdg_output_manager_v1_create(server.wl_display, server.output_layout)) {
 		wlr_log(WLR_ERROR, "Unable to create the output manager");
 		ret = 1;
 		goto end;
 	}
 
-	gamma_control_manager = wlr_gamma_control_manager_v1_create(server.wl_display);
-	if (!gamma_control_manager) {
+	server.output_manager_v1 = wlr_output_manager_v1_create(server.wl_display);
+	if (!server.output_manager_v1) {
+		wlr_log(WLR_ERROR, "Unable to create the output manager");
+		ret = 1;
+		goto end;
+	}
+	server.output_manager_apply.notify = handle_output_manager_apply;
+	wl_signal_add(&server.output_manager_v1->events.apply, &server.output_manager_apply);
+	server.output_manager_test.notify = handle_output_manager_test;
+	wl_signal_add(&server.output_manager_v1->events.test, &server.output_manager_test);
+
+	if (!wlr_gamma_control_manager_v1_create(server.wl_display)) {
 		wlr_log(WLR_ERROR, "Unable to create the gamma control manager");
 		ret = 1;
 		goto end;
 	}
 
+	struct wlr_virtual_keyboard_manager_v1 *virtual_keyboard =
+		wlr_virtual_keyboard_manager_v1_create(server.wl_display);
+	if (!virtual_keyboard) {
+		wlr_log(WLR_ERROR, "Unable to create the virtual keyboard manager");
+		ret = 1;
+		goto end;
+	}
+	wl_signal_add(&virtual_keyboard->events.new_virtual_keyboard, &server.new_virtual_keyboard);
+
+	struct wlr_virtual_pointer_manager_v1 *virtual_pointer =
+		wlr_virtual_pointer_manager_v1_create(server.wl_display);
+	if (!virtual_pointer) {
+		wlr_log(WLR_ERROR, "Unable to create the virtual pointer manager");
+		ret = 1;
+		goto end;
+	}
+	wl_signal_add(&virtual_pointer->events.new_virtual_pointer, &server.new_virtual_pointer);
+
+	server.relative_pointer_manager = wlr_relative_pointer_manager_v1_create(server.wl_display);
+	if (!server.relative_pointer_manager) {
+		wlr_log(WLR_ERROR, "Unable to create the relative pointer manager");
+		ret = 1;
+		goto end;
+	}
+
 #if CAGE_HAS_XWAYLAND
-	xwayland = wlr_xwayland_create(server.wl_display, compositor, true);
+	struct wlr_xcursor_manager *xcursor_manager = NULL;
+	struct wlr_xwayland *xwayland = wlr_xwayland_create(server.wl_display, compositor, true);
 	if (!xwayland) {
 		wlr_log(WLR_ERROR, "Cannot create XWayland server");
-		ret = 1;
-		goto end;
-	}
-	server.new_xwayland_surface.notify = handle_xwayland_surface_new;
-	wl_signal_add(&xwayland->events.new_surface, &server.new_xwayland_surface);
-
-	xcursor_manager = wlr_xcursor_manager_create(DEFAULT_XCURSOR, XCURSOR_SIZE);
-	if (!xcursor_manager) {
-		wlr_log(WLR_ERROR, "Cannot create XWayland XCursor manager");
-		ret = 1;
-		goto end;
-	}
-
-	if (setenv("DISPLAY", xwayland->display_name, true) < 0) {
-		wlr_log_errno(WLR_ERROR, "Unable to set DISPLAY for XWayland. Clients may not be able to connect");
 	} else {
-		wlr_log(WLR_DEBUG, "XWayland is running on display %s", xwayland->display_name);
-	}
+		server.new_xwayland_surface.notify = handle_xwayland_surface_new;
+		wl_signal_add(&xwayland->events.new_surface, &server.new_xwayland_surface);
 
-	if (!wlr_xcursor_manager_load(xcursor_manager, 1)) {
-		wlr_log(WLR_ERROR, "Cannot load XWayland XCursor theme");
-	}
-	struct wlr_xcursor *xcursor = wlr_xcursor_manager_get_xcursor(xcursor_manager, DEFAULT_XCURSOR, 1);
-	if (xcursor) {
-		struct wlr_xcursor_image *image = xcursor->images[0];
-		wlr_xwayland_set_cursor(xwayland, image->buffer, image->width * 4, image->width, image->height,
-					image->hotspot_x, image->hotspot_y);
+		xcursor_manager = wlr_xcursor_manager_create(DEFAULT_XCURSOR, XCURSOR_SIZE);
+		if (!xcursor_manager) {
+			wlr_log(WLR_ERROR, "Cannot create XWayland XCursor manager");
+			ret = 1;
+			goto end;
+		}
+
+		if (setenv("DISPLAY", xwayland->display_name, true) < 0) {
+			wlr_log_errno(WLR_ERROR,
+				      "Unable to set DISPLAY for XWayland. Clients may not be able to connect");
+		} else {
+			wlr_log(WLR_DEBUG, "XWayland is running on display %s", xwayland->display_name);
+		}
+
+		if (!wlr_xcursor_manager_load(xcursor_manager, 1)) {
+			wlr_log(WLR_ERROR, "Cannot load XWayland XCursor theme");
+		}
+		struct wlr_xcursor *xcursor = wlr_xcursor_manager_get_xcursor(xcursor_manager, DEFAULT_XCURSOR, 1);
+		if (xcursor) {
+			struct wlr_xcursor_image *image = xcursor->images[0];
+			wlr_xwayland_set_cursor(xwayland, image->buffer, image->width * 4, image->width, image->height,
+						image->hotspot_x, image->hotspot_y);
+		}
 	}
 #endif
 
@@ -483,28 +582,44 @@ main(int argc, char *argv[])
 	}
 
 #if CAGE_HAS_XWAYLAND
-	wlr_xwayland_set_seat(xwayland, server.seat->seat);
+	if (xwayland) {
+		wlr_xwayland_set_seat(xwayland, server.seat->seat);
+	}
 #endif
 
-	if (!spawn_primary_client(server.wl_display, argv + optind, &pid, &sigchld_source)) {
+	if (optind < argc && !spawn_primary_client(&server, argv + optind, &pid, &sigchld_source)) {
 		ret = 1;
 		goto end;
 	}
 
-	/* Place the cursor in the center of the output layout. */
-	struct wlr_box *layout_box = wlr_output_layout_get_box(server.output_layout, NULL);
-	wlr_cursor_warp(server.seat->cursor, NULL, layout_box->width / 2, layout_box->height / 2);
-
+	seat_center_cursor(server.seat);
 	wl_display_run(server.wl_display);
 
 #if CAGE_HAS_XWAYLAND
+	if (xwayland) {
+		wl_list_remove(&server.new_xwayland_surface.link);
+	}
 	wlr_xwayland_destroy(xwayland);
 	wlr_xcursor_manager_destroy(xcursor_manager);
 #endif
 	wl_display_destroy_clients(server.wl_display);
 
+	wl_list_remove(&server.new_virtual_pointer.link);
+	wl_list_remove(&server.new_virtual_keyboard.link);
+	wl_list_remove(&server.output_manager_apply.link);
+	wl_list_remove(&server.output_manager_test.link);
+	wl_list_remove(&server.xdg_toplevel_decoration.link);
+	wl_list_remove(&server.new_xdg_toplevel.link);
+	wl_list_remove(&server.new_xdg_popup.link);
+	wl_list_remove(&server.new_idle_inhibitor_v1.link);
+	wl_list_remove(&server.new_output.link);
+	wl_list_remove(&server.output_layout_change.link);
+
 end:
-	cleanup_primary_client(pid);
+	if (pid != 0)
+		app_ret = cleanup_primary_client(pid);
+	if (!ret && server.return_app_code)
+		ret = app_ret;
 
 	wl_event_source_remove(sigint_source);
 	wl_event_source_remove(sigterm_source);
@@ -515,6 +630,8 @@ end:
 	/* This function is not null-safe, but we only ever get here
 	   with a proper wl_display. */
 	wl_display_destroy(server.wl_display);
-	wlr_output_layout_destroy(server.output_layout);
+	wlr_scene_node_destroy(&server.scene->tree.node);
+	wlr_allocator_destroy(server.allocator);
+	wlr_renderer_destroy(server.renderer);
 	return ret;
 }

idle_inhibit_v1.c

@@ -8,8 +8,8 @@
 
 #include <stdlib.h>
 #include <wayland-server-core.h>
-#include <wlr/types/wlr_idle.h>
 #include <wlr/types/wlr_idle_inhibit_v1.h>
+#include <wlr/types/wlr_idle_notify_v1.h>
 
 #include "idle_inhibit_v1.h"
 #include "server.h"
@@ -32,7 +32,7 @@ idle_inhibit_v1_check_active(struct cg_server *server)
 	   Hence, we simply check for any inhibitors and inhibit
 	   accordingly. */
 	bool inhibited = !wl_list_empty(&server->inhibitors);
-	wlr_idle_set_enabled(server->idle, NULL, !inhibited);
+	wlr_idle_notifier_v1_set_inhibited(server->idle, inhibited);
 }
 
 static void

meson.build

@@ -1,16 +1,17 @@
 project('cage', 'c',
-  version: '0.1.4',
+  version: '0.2.1',
   license: 'MIT',
+  meson_version: '>=0.58.1',
   default_options: [
     'c_std=c11',
-    'warning_level=3',
+    'warning_level=2',
+    'werror=true',
   ],
 )
 
 add_project_arguments(
   [
     '-DWLR_USE_UNSTABLE',
-    '-Wall',
     '-Wundef',
     '-Wno-unused-parameter',
   ],
@@ -34,14 +35,13 @@ if is_freebsd
   )
 endif
 
-wlroots        = dependency('wlroots', version: '>= 0.14.0')
+wlroots        = dependency('wlroots-0.19', fallback: ['wlroots', 'wlroots'])
 wayland_protos = dependency('wayland-protocols', version: '>=1.14')
 wayland_server = dependency('wayland-server')
-pixman         = dependency('pixman-1')
 xkbcommon      = dependency('xkbcommon')
 math           = cc.find_library('m')
 
-wl_protocol_dir = wayland_protos.get_pkgconfig_variable('pkgdatadir')
+wl_protocol_dir = wayland_protos.get_variable('pkgdatadir')
 wayland_scanner = find_program('wayland-scanner')
 wayland_scanner_server = generator(
   wayland_scanner,
@@ -64,22 +64,13 @@ server_protos = declare_dependency(
   sources: server_protos_headers,
 )
 
-if get_option('xwayland')
-  wlroots_has_xwayland = cc.get_define('WLR_HAS_XWAYLAND', prefix: '#include <wlr/config.h>', dependencies: wlroots) == '1'
-  if not wlroots_has_xwayland
-    error('Cannot build Cage with XWayland support: wlroots has been built without it')
-  else
-    have_xwayland = true
-  endif
-else
-  have_xwayland = false
-endif
+have_xwayland = wlroots.get_variable(pkgconfig: 'have_xwayland', internal: 'have_xwayland') == 'true'
 
 version = '@0@'.format(meson.project_version())
 git = find_program('git', native: true, required: false)
 if git.found()
-  git_commit = run_command([git, 'rev-parse', '--short', 'HEAD'])
-  git_branch = run_command([git, 'rev-parse', '--abbrev-ref', 'HEAD'])
+  git_commit = run_command([git, 'rev-parse', '--short', 'HEAD'], check: false)
+  git_branch = run_command([git, 'rev-parse', '--abbrev-ref', 'HEAD'], check: false)
   if git_commit.returncode() == 0 and git_branch.returncode() == 0
     version = '@0@-@1@ (branch \'@2@\')'.format(
       meson.project_version(),
@@ -95,7 +86,7 @@ conf_data.set_quoted('CAGE_VERSION', version)
 
 scdoc = dependency('scdoc', version: '>=1.9.2', native: true, required: get_option('man-pages'))
 if scdoc.found()
-  scdoc_prog = find_program(scdoc.get_pkgconfig_variable('scdoc'), native: true)
+  scdoc_prog = find_program(scdoc.get_variable('scdoc'), native: true)
   sh = find_program('sh', native: true)
   mandir = get_option('mandir')
   man_files = [
@@ -111,7 +102,7 @@ if scdoc.found()
       input: filename,
       output: output,
       command: [
-        sh, '-c', '@0@ < @INPUT@ > @1@'.format(scdoc_prog.path(), output)
+        sh, '-c', '@0@ < @INPUT@ > @1@'.format(scdoc_prog.full_path(), output)
       ],
       install: true,
       install_dir: '@0@/man@1@'.format(mandir, section)
@@ -123,9 +114,7 @@ cage_sources = [
   'cage.c',
   'idle_inhibit_v1.c',
   'output.c',
-  'render.c',
   'seat.c',
-  'util.c',
   'view.c',
   'xdg_shell.c',
 ]
@@ -136,10 +125,8 @@ cage_headers = [
                  configuration: conf_data),
   'idle_inhibit_v1.h',
   'output.h',
-  'render.h',
   'seat.h',
   'server.h',
-  'util.h',
   'view.h',
   'xdg_shell.h',
 ]
@@ -157,7 +144,6 @@ executable(
     wayland_server,
     wlroots,
     xkbcommon,
-    pixman,
     math,
   ],
   install: true,

meson_options.txt

@@ -1,2 +1 @@
 option('man-pages', type: 'feature', value: 'auto', description: 'Generate and install man pages')
-option('xwayland', type: 'boolean', value: 'false', description: 'Enable support for X11 applications')

output.c

@@ -1,7 +1,7 @@
 /*
  * Cage: A Wayland kiosk.
  *
- * Copyright (C) 2018-2020 Jente Hidskes
+ * Copyright (C) 2018-2021 Jente Hidskes
  * Copyright (C) 2019 The Sway authors
  *
  * See the LICENSE file accompanying this file.
@@ -11,6 +11,7 @@
 
 #include "config.h"
 
+#include <assert.h>
 #include <stdlib.h>
 #include <unistd.h>
 #include <wayland-server-core.h>
@@ -20,220 +21,79 @@
 #if WLR_HAS_X11_BACKEND
 #include <wlr/backend/x11.h>
 #endif
+#include <wlr/render/swapchain.h>
 #include <wlr/render/wlr_renderer.h>
+#include <wlr/types/wlr_compositor.h>
 #include <wlr/types/wlr_data_device.h>
-#include <wlr/types/wlr_matrix.h>
 #include <wlr/types/wlr_output.h>
-#include <wlr/types/wlr_output_damage.h>
 #include <wlr/types/wlr_output_layout.h>
-#include <wlr/types/wlr_surface.h>
+#include <wlr/types/wlr_output_management_v1.h>
+#include <wlr/types/wlr_output_swapchain_manager.h>
+#include <wlr/types/wlr_scene.h>
 #include <wlr/types/wlr_xdg_shell.h>
 #include <wlr/util/log.h>
 #include <wlr/util/region.h>
 
 #include "output.h"
-#include "render.h"
 #include "seat.h"
 #include "server.h"
-#include "util.h"
 #include "view.h"
 #if CAGE_HAS_XWAYLAND
 #include "xwayland.h"
 #endif
 
-static void output_for_each_surface(struct cg_output *output, cg_surface_iterator_func_t iterator, void *user_data);
+#define OUTPUT_CONFIG_UPDATED                                                                                          \
+	(WLR_OUTPUT_STATE_ENABLED | WLR_OUTPUT_STATE_MODE | WLR_OUTPUT_STATE_SCALE | WLR_OUTPUT_STATE_TRANSFORM |      \
+	 WLR_OUTPUT_STATE_ADAPTIVE_SYNC_ENABLED)
 
-struct surface_iterator_data {
-	cg_surface_iterator_func_t user_iterator;
-	void *user_data;
+static void
+update_output_manager_config(struct cg_server *server)
+{
+	struct wlr_output_configuration_v1 *config = wlr_output_configuration_v1_create();
 
 	struct cg_output *output;
+	wl_list_for_each (output, &server->outputs, link) {
+		struct wlr_output *wlr_output = output->wlr_output;
+		struct wlr_output_configuration_head_v1 *config_head =
+			wlr_output_configuration_head_v1_create(config, wlr_output);
+		struct wlr_box output_box;
 
-	/* Output-local coordinates. */
-	double ox, oy;
-};
+		wlr_output_layout_get_box(server->output_layout, wlr_output, &output_box);
+		if (!wlr_box_empty(&output_box)) {
+			config_head->state.x = output_box.x;
+			config_head->state.y = output_box.y;
+		}
+	}
 
-static bool
-intersects_with_output(struct cg_output *output, struct wlr_output_layout *output_layout, struct wlr_box *surface_box)
-{
-	/* Since the surface_box's x- and y-coordinates are already output local,
-	 * the x- and y-coordinates of this box need to be 0 for this function to
-	 * work correctly. */
-	struct wlr_box output_box = {0};
-	wlr_output_effective_resolution(output->wlr_output, &output_box.width, &output_box.height);
-
-	struct wlr_box intersection;
-	return wlr_box_intersection(&intersection, &output_box, surface_box);
+	wlr_output_manager_v1_set_configuration(server->output_manager_v1, config);
 }
 
-static void
-output_for_each_surface_iterator(struct wlr_surface *surface, int sx, int sy, void *user_data)
+static inline void
+output_layout_add_auto(struct cg_output *output)
 {
-	struct surface_iterator_data *data = user_data;
-	struct cg_output *output = data->output;
+	assert(output->scene_output != NULL);
+	struct wlr_output_layout_output *layout_output =
+		wlr_output_layout_add_auto(output->server->output_layout, output->wlr_output);
+	wlr_scene_output_layout_add_output(output->server->scene_output_layout, layout_output, output->scene_output);
+}
 
-	if (!wlr_surface_has_buffer(surface)) {
+static inline void
+output_layout_add(struct cg_output *output, int32_t x, int32_t y)
+{
+	assert(output->scene_output != NULL);
+	bool exists = wlr_output_layout_get(output->server->output_layout, output->wlr_output);
+	struct wlr_output_layout_output *layout_output =
+		wlr_output_layout_add(output->server->output_layout, output->wlr_output, x, y);
+	if (exists) {
 		return;
 	}
-
-	struct wlr_box surface_box = {
-		.x = data->ox + sx + surface->sx,
-		.y = data->oy + sy + surface->sy,
-		.width = surface->current.width,
-		.height = surface->current.height,
-	};
-
-	if (!intersects_with_output(output, output->server->output_layout, &surface_box)) {
-		return;
-	}
-
-	data->user_iterator(data->output, surface, &surface_box, data->user_data);
+	wlr_scene_output_layout_add_output(output->server->scene_output_layout, layout_output, output->scene_output);
 }
 
-void
-output_surface_for_each_surface(struct cg_output *output, struct wlr_surface *surface, double ox, double oy,
-				cg_surface_iterator_func_t iterator, void *user_data)
+static inline void
+output_layout_remove(struct cg_output *output)
 {
-	struct surface_iterator_data data = {
-		.user_iterator = iterator,
-		.user_data = user_data,
-		.output = output,
-		.ox = ox,
-		.oy = oy,
-	};
-
-	wlr_surface_for_each_surface(surface, output_for_each_surface_iterator, &data);
-}
-
-static void
-output_view_for_each_surface(struct cg_output *output, struct cg_view *view, cg_surface_iterator_func_t iterator,
-			     void *user_data)
-{
-	struct surface_iterator_data data = {
-		.user_iterator = iterator,
-		.user_data = user_data,
-		.output = output,
-		.ox = view->lx,
-		.oy = view->ly,
-	};
-
-	wlr_output_layout_output_coords(output->server->output_layout, output->wlr_output, &data.ox, &data.oy);
-	view_for_each_surface(view, output_for_each_surface_iterator, &data);
-}
-
-void
-output_view_for_each_popup_surface(struct cg_output *output, struct cg_view *view, cg_surface_iterator_func_t iterator,
-				   void *user_data)
-{
-	struct surface_iterator_data data = {
-		.user_iterator = iterator,
-		.user_data = user_data,
-		.output = output,
-		.ox = view->lx,
-		.oy = view->ly,
-	};
-
-	wlr_output_layout_output_coords(output->server->output_layout, output->wlr_output, &data.ox, &data.oy);
-	view_for_each_popup_surface(view, output_for_each_surface_iterator, &data);
-}
-
-void
-output_drag_icons_for_each_surface(struct cg_output *output, struct wl_list *drag_icons,
-				   cg_surface_iterator_func_t iterator, void *user_data)
-{
-	struct cg_drag_icon *drag_icon;
-	wl_list_for_each (drag_icon, drag_icons, link) {
-		if (drag_icon->wlr_drag_icon->mapped) {
-			double ox = drag_icon->lx;
-			double oy = drag_icon->ly;
-			wlr_output_layout_output_coords(output->server->output_layout, output->wlr_output, &ox, &oy);
-			output_surface_for_each_surface(output, drag_icon->wlr_drag_icon->surface, ox, oy, iterator,
-							user_data);
-		}
-	}
-}
-
-static void
-output_for_each_surface(struct cg_output *output, cg_surface_iterator_func_t iterator, void *user_data)
-{
-	struct cg_view *view;
-	wl_list_for_each_reverse (view, &output->server->views, link) {
-		output_view_for_each_surface(output, view, iterator, user_data);
-	}
-
-	output_drag_icons_for_each_surface(output, &output->server->seat->drag_icons, iterator, user_data);
-}
-
-struct send_frame_done_data {
-	struct timespec when;
-};
-
-static void
-send_frame_done_iterator(struct cg_output *output, struct wlr_surface *surface, struct wlr_box *box, void *user_data)
-{
-	struct send_frame_done_data *data = user_data;
-	wlr_surface_send_frame_done(surface, &data->when);
-}
-
-static void
-send_frame_done(struct cg_output *output, struct send_frame_done_data *data)
-{
-	output_for_each_surface(output, send_frame_done_iterator, data);
-}
-
-static void
-count_surface_iterator(struct cg_output *output, struct wlr_surface *surface, struct wlr_box *_box, void *data)
-{
-	size_t *n = data;
-	n++;
-}
-
-static bool
-scan_out_primary_view(struct cg_output *output)
-{
-	struct cg_server *server = output->server;
-	struct wlr_output *wlr_output = output->wlr_output;
-
-	struct cg_drag_icon *drag_icon;
-	wl_list_for_each (drag_icon, &server->seat->drag_icons, link) {
-		if (drag_icon->wlr_drag_icon->mapped) {
-			return false;
-		}
-	}
-
-	struct cg_view *view = seat_get_focus(server->seat);
-	if (!view || !view->wlr_surface) {
-		return false;
-	}
-
-	size_t n_surfaces = 0;
-	output_view_for_each_surface(output, view, count_surface_iterator, &n_surfaces);
-	if (n_surfaces > 1) {
-		return false;
-	}
-
-#if CAGE_HAS_XWAYLAND
-	if (view->type == CAGE_XWAYLAND_VIEW) {
-		struct cg_xwayland_view *xwayland_view = xwayland_view_from_view(view);
-		if (!wl_list_empty(&xwayland_view->xwayland_surface->children)) {
-			return false;
-		}
-	}
-#endif
-
-	struct wlr_surface *surface = view->wlr_surface;
-
-	if (!surface->buffer) {
-		return false;
-	}
-
-	if ((float) surface->current.scale != wlr_output->scale ||
-	    surface->current.transform != wlr_output->transform) {
-		return false;
-	}
-
-	wlr_output_attach_buffer(wlr_output, &surface->buffer->base);
-	return wlr_output_commit(wlr_output);
+	wlr_output_layout_remove(output->server->output_layout, output->wlr_output);
 }
 
 static void
@@ -246,115 +106,46 @@ output_enable(struct cg_output *output)
 	 * duplicate the enabled property in cg_output. */
 	wlr_log(WLR_DEBUG, "Enabling output %s", wlr_output->name);
 
-	wlr_output_layout_add_auto(output->server->output_layout, wlr_output);
-	wlr_output_enable(wlr_output, true);
-	wlr_output_commit(wlr_output);
+	struct wlr_output_state state = {0};
+	wlr_output_state_set_enabled(&state, true);
+
+	if (wlr_output_commit_state(wlr_output, &state)) {
+		output_layout_add_auto(output);
+	}
+
+	update_output_manager_config(output->server);
 }
 
 static void
 output_disable(struct cg_output *output)
 {
 	struct wlr_output *wlr_output = output->wlr_output;
-
 	if (!wlr_output->enabled) {
 		wlr_log(WLR_DEBUG, "Not disabling already disabled output %s", wlr_output->name);
 		return;
 	}
 
 	wlr_log(WLR_DEBUG, "Disabling output %s", wlr_output->name);
-	wlr_output_enable(wlr_output, false);
-	wlr_output_layout_remove(output->server->output_layout, wlr_output);
-	wlr_output_commit(wlr_output);
+	struct wlr_output_state state = {0};
+	wlr_output_state_set_enabled(&state, false);
+	wlr_output_commit_state(wlr_output, &state);
+	output_layout_remove(output);
 }
 
 static void
-damage_surface_iterator(struct cg_output *output, struct wlr_surface *surface, struct wlr_box *box, void *user_data)
+handle_output_frame(struct wl_listener *listener, void *data)
 {
-	struct wlr_output *wlr_output = output->wlr_output;
-	bool whole = *(bool *) user_data;
+	struct cg_output *output = wl_container_of(listener, output, frame);
 
-	scale_box(box, output->wlr_output->scale);
-
-	if (whole) {
-		wlr_output_damage_add_box(output->damage, box);
-	} else if (pixman_region32_not_empty(&surface->buffer_damage)) {
-		pixman_region32_t damage;
-		pixman_region32_init(&damage);
-		wlr_surface_get_effective_damage(surface, &damage);
-
-		wlr_region_scale(&damage, &damage, wlr_output->scale);
-		if (ceil(wlr_output->scale) > surface->current.scale) {
-			/* When scaling up a surface it'll become
-			   blurry, so we need to expand the damage
-			   region. */
-			wlr_region_expand(&damage, &damage, ceil(wlr_output->scale) - surface->current.scale);
-		}
-		pixman_region32_translate(&damage, box->x, box->y);
-		wlr_output_damage_add(output->damage, &damage);
-		pixman_region32_fini(&damage);
-	}
-}
-
-void
-output_damage_surface(struct cg_output *output, struct wlr_surface *surface, double lx, double ly, bool whole)
-{
-	if (!output->wlr_output->enabled) {
-		wlr_log(WLR_DEBUG, "Not adding damage for disabled output %s", output->wlr_output->name);
+	if (!output->wlr_output->enabled || !output->scene_output) {
 		return;
 	}
 
-	double ox = lx, oy = ly;
-	wlr_output_layout_output_coords(output->server->output_layout, output->wlr_output, &ox, &oy);
-	output_surface_for_each_surface(output, surface, ox, oy, damage_surface_iterator, &whole);
-}
+	wlr_scene_output_commit(output->scene_output, NULL);
 
-static void
-handle_output_damage_frame(struct wl_listener *listener, void *data)
-{
-	struct cg_output *output = wl_container_of(listener, output, damage_frame);
-	struct send_frame_done_data frame_data = {0};
-
-	if (!output->wlr_output->enabled) {
-		return;
-	}
-
-	/* Check if we can scan-out the primary view. */
-	static bool last_scanned_out = false;
-	bool scanned_out = scan_out_primary_view(output);
-
-	if (scanned_out && !last_scanned_out) {
-		wlr_log(WLR_DEBUG, "Scanning out primary view");
-	}
-	if (last_scanned_out && !scanned_out) {
-		wlr_log(WLR_DEBUG, "Stopping primary view scan out");
-	}
-	last_scanned_out = scanned_out;
-
-	if (scanned_out) {
-		goto frame_done;
-	}
-
-	bool needs_frame;
-	pixman_region32_t damage;
-	pixman_region32_init(&damage);
-	if (!wlr_output_damage_attach_render(output->damage, &needs_frame, &damage)) {
-		wlr_log(WLR_ERROR, "Cannot make damage output current");
-		goto damage_finish;
-	}
-
-	if (!needs_frame) {
-		wlr_output_rollback(output->wlr_output);
-		goto damage_finish;
-	}
-
-	output_render(output, &damage);
-
-damage_finish:
-	pixman_region32_fini(&damage);
-
-frame_done:
-	clock_gettime(CLOCK_MONOTONIC, &frame_data.when);
-	send_frame_done(output, &frame_data);
+	struct timespec now = {0};
+	clock_gettime(CLOCK_MONOTONIC, &now);
+	wlr_scene_output_send_frame_done(output->scene_output, &now);
 }
 
 static void
@@ -363,76 +154,80 @@ handle_output_commit(struct wl_listener *listener, void *data)
 	struct cg_output *output = wl_container_of(listener, output, commit);
 	struct wlr_output_event_commit *event = data;
 
-	if (!output->wlr_output->enabled) {
-		return;
-	}
+	/* Notes:
+	 * - output layout change will also be called if needed to position the views
+	 * - always update output manager configuration even if the output is now disabled */
 
-	if (event->committed & WLR_OUTPUT_STATE_TRANSFORM) {
-		struct cg_view *view;
-		wl_list_for_each (view, &output->server->views, link) {
-			view_position(view);
-		}
+	if (event->state->committed & OUTPUT_CONFIG_UPDATED) {
+		update_output_manager_config(output->server);
 	}
 }
 
 static void
-handle_output_mode(struct wl_listener *listener, void *data)
+handle_output_request_state(struct wl_listener *listener, void *data)
 {
-	struct cg_output *output = wl_container_of(listener, output, mode);
+	struct cg_output *output = wl_container_of(listener, output, request_state);
+	struct wlr_output_event_request_state *event = data;
 
-	if (!output->wlr_output->enabled) {
-		return;
+	if (wlr_output_commit_state(output->wlr_output, event->state)) {
+		update_output_manager_config(output->server);
 	}
+}
 
-	struct cg_view *view;
-	wl_list_for_each (view, &output->server->views, link) {
-		view_position(view);
+void
+handle_output_layout_change(struct wl_listener *listener, void *data)
+{
+	struct cg_server *server = wl_container_of(listener, server, output_layout_change);
+
+	view_position_all(server);
+	update_output_manager_config(server);
+}
+
+static bool
+is_nested_output(struct cg_output *output)
+{
+	if (wlr_output_is_wl(output->wlr_output)) {
+		return true;
 	}
+#if WLR_HAS_X11_BACKEND
+	if (wlr_output_is_x11(output->wlr_output)) {
+		return true;
+	}
+#endif
+	return false;
 }
 
 static void
 output_destroy(struct cg_output *output)
 {
 	struct cg_server *server = output->server;
+	bool was_nested_output = is_nested_output(output);
+
+	output->wlr_output->data = NULL;
 
 	wl_list_remove(&output->destroy.link);
 	wl_list_remove(&output->commit.link);
-	wl_list_remove(&output->mode.link);
-	wl_list_remove(&output->damage_frame.link);
-	wl_list_remove(&output->damage_destroy.link);
+	wl_list_remove(&output->request_state.link);
+	wl_list_remove(&output->frame.link);
 	wl_list_remove(&output->link);
 
-	wlr_output_layout_remove(server->output_layout, output->wlr_output);
+	output_layout_remove(output);
 
 	free(output);
 
-	if (wl_list_empty(&server->outputs)) {
-		wl_display_terminate(server->wl_display);
-	} else if (server->output_mode == CAGE_MULTI_OUTPUT_MODE_LAST) {
+	if (wl_list_empty(&server->outputs) && was_nested_output) {
+		server_terminate(server);
+	} else if (server->output_mode == CAGE_MULTI_OUTPUT_MODE_LAST && !wl_list_empty(&server->outputs)) {
 		struct cg_output *prev = wl_container_of(server->outputs.next, prev, link);
-		if (prev) {
-			output_enable(prev);
-
-			struct cg_view *view;
-			wl_list_for_each (view, &server->views, link) {
-				view_position(view);
-			}
-		}
+		output_enable(prev);
+		view_position_all(server);
 	}
 }
 
-static void
-handle_output_damage_destroy(struct wl_listener *listener, void *data)
-{
-	struct cg_output *output = wl_container_of(listener, output, damage_destroy);
-	output_destroy(output);
-}
-
 static void
 handle_output_destroy(struct wl_listener *listener, void *data)
 {
 	struct cg_output *output = wl_container_of(listener, output, destroy);
-	wlr_output_damage_destroy(output->damage);
 	output_destroy(output);
 }
 
@@ -442,6 +237,11 @@ handle_new_output(struct wl_listener *listener, void *data)
 	struct cg_server *server = wl_container_of(listener, server, new_output);
 	struct wlr_output *wlr_output = data;
 
+	if (!wlr_output_init_render(wlr_output, server->allocator, server->renderer)) {
+		wlr_log(WLR_ERROR, "Failed to initialize output rendering");
+		return;
+	}
+
 	struct cg_output *output = calloc(1, sizeof(struct cg_output));
 	if (!output) {
 		wlr_log(WLR_ERROR, "Failed to allocate output");
@@ -449,32 +249,51 @@ handle_new_output(struct wl_listener *listener, void *data)
 	}
 
 	output->wlr_output = wlr_output;
+	wlr_output->data = output;
 	output->server = server;
-	output->damage = wlr_output_damage_create(wlr_output);
+
 	wl_list_insert(&server->outputs, &output->link);
 
 	output->commit.notify = handle_output_commit;
 	wl_signal_add(&wlr_output->events.commit, &output->commit);
-	output->mode.notify = handle_output_mode;
-	wl_signal_add(&wlr_output->events.mode, &output->mode);
+	output->request_state.notify = handle_output_request_state;
+	wl_signal_add(&wlr_output->events.request_state, &output->request_state);
 	output->destroy.notify = handle_output_destroy;
 	wl_signal_add(&wlr_output->events.destroy, &output->destroy);
-	output->damage_frame.notify = handle_output_damage_frame;
-	wl_signal_add(&output->damage->events.frame, &output->damage_frame);
-	output->damage_destroy.notify = handle_output_damage_destroy;
-	wl_signal_add(&output->damage->events.destroy, &output->damage_destroy);
+	output->frame.notify = handle_output_frame;
+	wl_signal_add(&wlr_output->events.frame, &output->frame);
 
-	struct wlr_output_mode *preferred_mode = wlr_output_preferred_mode(wlr_output);
-	if (preferred_mode) {
-		wlr_output_set_mode(wlr_output, preferred_mode);
+	output->scene_output = wlr_scene_output_create(server->scene, wlr_output);
+	if (!output->scene_output) {
+		wlr_log(WLR_ERROR, "Failed to allocate scene output");
+		return;
 	}
-	wlr_output_set_transform(wlr_output, output->server->output_transform);
 
-	if (server->output_mode == CAGE_MULTI_OUTPUT_MODE_LAST) {
-		struct cg_output *next = wl_container_of(output->link.next, next, link);
-		if (next) {
-			output_disable(next);
+	struct wlr_output_state state = {0};
+	wlr_output_state_set_enabled(&state, true);
+	if (!wl_list_empty(&wlr_output->modes)) {
+		struct wlr_output_mode *preferred_mode = wlr_output_preferred_mode(wlr_output);
+		if (preferred_mode) {
+			wlr_output_state_set_mode(&state, preferred_mode);
 		}
+		if (!wlr_output_test_state(wlr_output, &state)) {
+			struct wlr_output_mode *mode;
+			wl_list_for_each (mode, &wlr_output->modes, link) {
+				if (mode == preferred_mode) {
+					continue;
+				}
+
+				wlr_output_state_set_mode(&state, mode);
+				if (wlr_output_test_state(wlr_output, &state)) {
+					break;
+				}
+			}
+		}
+	}
+
+	if (server->output_mode == CAGE_MULTI_OUTPUT_MODE_LAST && wl_list_length(&server->outputs) > 1) {
+		struct cg_output *next = wl_container_of(output->link.next, next, link);
+		output_disable(next);
 	}
 
 	if (!wlr_xcursor_manager_load(server->seat->xcursor_manager, wlr_output->scale)) {
@@ -482,12 +301,13 @@ handle_new_output(struct wl_listener *listener, void *data)
 			wlr_output->scale);
 	}
 
-	output_enable(output);
-
-	struct cg_view *view;
-	wl_list_for_each (view, &output->server->views, link) {
-		view_position(view);
+	wlr_log(WLR_DEBUG, "Enabling new output %s", wlr_output->name);
+	if (wlr_output_commit_state(wlr_output, &state)) {
+		output_layout_add_auto(output);
 	}
+
+	view_position_all(output->server);
+	update_output_manager_config(output->server);
 }
 
 void
@@ -508,3 +328,95 @@ output_set_window_title(struct cg_output *output, const char *title)
 #endif
 	}
 }
+
+static bool
+output_config_apply(struct cg_server *server, struct wlr_output_configuration_v1 *config, bool test_only)
+{
+	bool ok = false;
+
+	size_t states_len;
+	struct wlr_backend_output_state *states = wlr_output_configuration_v1_build_state(config, &states_len);
+	if (states == NULL) {
+		return false;
+	}
+
+	struct wlr_output_swapchain_manager swapchain_manager;
+	wlr_output_swapchain_manager_init(&swapchain_manager, server->backend);
+
+	ok = wlr_output_swapchain_manager_prepare(&swapchain_manager, states, states_len);
+	if (!ok || test_only) {
+		goto out;
+	}
+
+	for (size_t i = 0; i < states_len; i++) {
+		struct wlr_backend_output_state *backend_state = &states[i];
+		struct cg_output *output = backend_state->output->data;
+
+		struct wlr_swapchain *swapchain =
+			wlr_output_swapchain_manager_get_swapchain(&swapchain_manager, backend_state->output);
+		struct wlr_scene_output_state_options options = {
+			.swapchain = swapchain,
+		};
+		struct wlr_output_state *state = &backend_state->base;
+		if (!wlr_scene_output_build_state(output->scene_output, state, &options)) {
+			ok = false;
+			goto out;
+		}
+	}
+
+	ok = wlr_backend_commit(server->backend, states, states_len);
+	if (!ok) {
+		goto out;
+	}
+
+	wlr_output_swapchain_manager_apply(&swapchain_manager);
+
+	struct wlr_output_configuration_head_v1 *head;
+	wl_list_for_each (head, &config->heads, link) {
+		struct cg_output *output = head->state.output->data;
+
+		if (head->state.enabled) {
+			output_layout_add(output, head->state.x, head->state.y);
+		} else {
+			output_layout_remove(output);
+		}
+	}
+
+out:
+	wlr_output_swapchain_manager_finish(&swapchain_manager);
+	for (size_t i = 0; i < states_len; i++) {
+		wlr_output_state_finish(&states[i].base);
+	}
+	free(states);
+	return ok;
+}
+
+void
+handle_output_manager_apply(struct wl_listener *listener, void *data)
+{
+	struct cg_server *server = wl_container_of(listener, server, output_manager_apply);
+	struct wlr_output_configuration_v1 *config = data;
+
+	if (output_config_apply(server, config, false)) {
+		wlr_output_configuration_v1_send_succeeded(config);
+	} else {
+		wlr_output_configuration_v1_send_failed(config);
+	}
+
+	wlr_output_configuration_v1_destroy(config);
+}
+
+void
+handle_output_manager_test(struct wl_listener *listener, void *data)
+{
+	struct cg_server *server = wl_container_of(listener, server, output_manager_test);
+	struct wlr_output_configuration_v1 *config = data;
+
+	if (output_config_apply(server, config, true)) {
+		wlr_output_configuration_v1_send_succeeded(config);
+	} else {
+		wlr_output_configuration_v1_send_failed(config);
+	}
+
+	wlr_output_configuration_v1_destroy(config);
+}

output.h

@@ -3,7 +3,6 @@
 
 #include <wayland-server-core.h>
 #include <wlr/types/wlr_output.h>
-#include <wlr/types/wlr_output_damage.h>
 
 #include "server.h"
 #include "view.h"
@@ -11,28 +10,20 @@
 struct cg_output {
 	struct cg_server *server;
 	struct wlr_output *wlr_output;
-	struct wlr_output_damage *damage;
+	struct wlr_scene_output *scene_output;
 
 	struct wl_listener commit;
-	struct wl_listener mode;
+	struct wl_listener request_state;
 	struct wl_listener destroy;
-	struct wl_listener damage_frame;
-	struct wl_listener damage_destroy;
+	struct wl_listener frame;
 
 	struct wl_list link; // cg_server::outputs
 };
 
-typedef void (*cg_surface_iterator_func_t)(struct cg_output *output, struct wlr_surface *surface, struct wlr_box *box,
-					   void *user_data);
-
+void handle_output_manager_apply(struct wl_listener *listener, void *data);
+void handle_output_manager_test(struct wl_listener *listener, void *data);
+void handle_output_layout_change(struct wl_listener *listener, void *data);
 void handle_new_output(struct wl_listener *listener, void *data);
-void output_surface_for_each_surface(struct cg_output *output, struct wlr_surface *surface, double ox, double oy,
-				     cg_surface_iterator_func_t iterator, void *user_data);
-void output_view_for_each_popup_surface(struct cg_output *output, struct cg_view *view,
-					cg_surface_iterator_func_t iterator, void *user_data);
-void output_drag_icons_for_each_surface(struct cg_output *output, struct wl_list *drag_icons,
-					cg_surface_iterator_func_t iterator, void *user_data);
-void output_damage_surface(struct cg_output *output, struct wlr_surface *surface, double lx, double ly, bool whole);
 void output_set_window_title(struct cg_output *output, const char *title);
 
 #endif

render.c

@@ -1,205 +0,0 @@
-/*
- * Cage: A Wayland kiosk.
- *
- * Copyright (C) 2018-2020 Jente Hidskes
- * Copyright (C) 2019 The Sway authors
- *
- * See the LICENSE file accompanying this file.
- */
-
-#include <wayland-server-core.h>
-#include <wlr/backend.h>
-#include <wlr/render/wlr_renderer.h>
-#include <wlr/types/wlr_box.h>
-#include <wlr/types/wlr_matrix.h>
-#include <wlr/types/wlr_output.h>
-#include <wlr/types/wlr_output_layout.h>
-#include <wlr/types/wlr_surface.h>
-#include <wlr/util/log.h>
-#include <wlr/util/region.h>
-
-#include "output.h"
-#include "seat.h"
-#include "server.h"
-#include "util.h"
-#include "view.h"
-
-static void
-scissor_output(struct wlr_output *output, pixman_box32_t *rect)
-{
-	struct wlr_renderer *renderer = wlr_backend_get_renderer(output->backend);
-
-	struct wlr_box box = {
-		.x = rect->x1,
-		.y = rect->y1,
-		.width = rect->x2 - rect->x1,
-		.height = rect->y2 - rect->y1,
-	};
-
-	int output_width, output_height;
-	wlr_output_transformed_resolution(output, &output_width, &output_height);
-	enum wl_output_transform transform = wlr_output_transform_invert(output->transform);
-	wlr_box_transform(&box, &box, transform, output_width, output_height);
-
-	wlr_renderer_scissor(renderer, &box);
-}
-
-struct render_data {
-	pixman_region32_t *damage;
-};
-
-static void
-render_texture(struct wlr_output *wlr_output, pixman_region32_t *output_damage, struct wlr_texture *texture,
-	       const struct wlr_box *box, const float matrix[static 9])
-{
-	struct wlr_renderer *renderer = wlr_backend_get_renderer(wlr_output->backend);
-
-	pixman_region32_t damage;
-	pixman_region32_init(&damage);
-	pixman_region32_union_rect(&damage, &damage, box->x, box->y, box->width, box->height);
-	pixman_region32_intersect(&damage, &damage, output_damage);
-	if (!pixman_region32_not_empty(&damage)) {
-		goto damage_finish;
-	}
-
-	int nrects;
-	pixman_box32_t *rects = pixman_region32_rectangles(&damage, &nrects);
-	for (int i = 0; i < nrects; i++) {
-		scissor_output(wlr_output, &rects[i]);
-		wlr_render_texture_with_matrix(renderer, texture, matrix, 1.0f);
-	}
-
-damage_finish:
-	pixman_region32_fini(&damage);
-}
-
-static void
-render_surface_iterator(struct cg_output *output, struct wlr_surface *surface, struct wlr_box *box, void *user_data)
-{
-	struct render_data *data = user_data;
-	struct wlr_output *wlr_output = output->wlr_output;
-	pixman_region32_t *output_damage = data->damage;
-
-	struct wlr_texture *texture = wlr_surface_get_texture(surface);
-	if (!texture) {
-		wlr_log(WLR_DEBUG, "Cannot obtain surface texture");
-		return;
-	}
-
-	scale_box(box, wlr_output->scale);
-
-	float matrix[9];
-	enum wl_output_transform transform = wlr_output_transform_invert(surface->current.transform);
-	wlr_matrix_project_box(matrix, box, transform, 0.0f, wlr_output->transform_matrix);
-
-	render_texture(wlr_output, output_damage, texture, box, matrix);
-}
-
-static void
-render_drag_icons(struct cg_output *output, pixman_region32_t *damage, struct wl_list *drag_icons)
-{
-	struct render_data data = {
-		.damage = damage,
-	};
-	output_drag_icons_for_each_surface(output, drag_icons, render_surface_iterator, &data);
-}
-
-/**
- * Render all toplevels without descending into popups.
- */
-static void
-render_view_toplevels(struct cg_view *view, struct cg_output *output, pixman_region32_t *damage)
-{
-	struct render_data data = {
-		.damage = damage,
-	};
-	double ox = view->lx;
-	double oy = view->ly;
-	wlr_output_layout_output_coords(output->server->output_layout, output->wlr_output, &ox, &oy);
-	output_surface_for_each_surface(output, view->wlr_surface, ox, oy, render_surface_iterator, &data);
-}
-
-static void
-render_view_popups(struct cg_view *view, struct cg_output *output, pixman_region32_t *damage)
-{
-	struct render_data data = {
-		.damage = damage,
-	};
-	output_view_for_each_popup_surface(output, view, render_surface_iterator, &data);
-}
-
-void
-output_render(struct cg_output *output, pixman_region32_t *damage)
-{
-	struct cg_server *server = output->server;
-	struct wlr_output *wlr_output = output->wlr_output;
-
-	struct wlr_renderer *renderer = wlr_backend_get_renderer(wlr_output->backend);
-	if (!renderer) {
-		wlr_log(WLR_DEBUG, "Expected the output backend to have a renderer");
-		return;
-	}
-
-	wlr_renderer_begin(renderer, wlr_output->width, wlr_output->height);
-
-	if (!pixman_region32_not_empty(damage)) {
-		wlr_log(WLR_DEBUG, "Output isn't damaged but needs a buffer swap");
-		goto renderer_end;
-	}
-
-#ifdef DEBUG
-	if (server->debug_damage_tracking) {
-		wlr_renderer_clear(renderer, (float[]){1.0f, 0.0f, 0.0f, 1.0f});
-	}
-#endif
-
-	float color[4] = {0.0f, 0.0f, 0.0f, 1.0f};
-	int nrects;
-	pixman_box32_t *rects = pixman_region32_rectangles(damage, &nrects);
-	for (int i = 0; i < nrects; i++) {
-		scissor_output(wlr_output, &rects[i]);
-		wlr_renderer_clear(renderer, color);
-	}
-
-	// TODO: render only top view, possibly use focused view for this, see #35.
-	struct cg_view *view;
-	wl_list_for_each_reverse (view, &server->views, link) {
-		render_view_toplevels(view, output, damage);
-	}
-
-	struct cg_view *focused_view = seat_get_focus(server->seat);
-	if (focused_view) {
-		render_view_popups(focused_view, output, damage);
-	}
-
-	render_drag_icons(output, damage, &server->seat->drag_icons);
-
-renderer_end:
-	/* Draw software cursor in case hardware cursors aren't
-	   available. This is a no-op when they are. */
-	wlr_output_render_software_cursors(wlr_output, damage);
-	wlr_renderer_scissor(renderer, NULL);
-	wlr_renderer_end(renderer);
-
-	int output_width, output_height;
-	wlr_output_transformed_resolution(wlr_output, &output_width, &output_height);
-
-	pixman_region32_t frame_damage;
-	pixman_region32_init(&frame_damage);
-
-	enum wl_output_transform transform = wlr_output_transform_invert(wlr_output->transform);
-	wlr_region_transform(&frame_damage, &output->damage->current, transform, output_width, output_height);
-
-#ifdef DEBUG
-	if (server->debug_damage_tracking) {
-		pixman_region32_union_rect(&frame_damage, &frame_damage, 0, 0, output_width, output_height);
-	}
-#endif
-
-	wlr_output_set_damage(wlr_output, &frame_damage);
-	pixman_region32_fini(&frame_damage);
-
-	if (!wlr_output_commit(wlr_output)) {
-		wlr_log(WLR_ERROR, "Could not commit output");
-	}
-}

render.h

@@ -1,8 +0,0 @@
-#ifndef CG_RENDER_H
-#define CG_RENDER_H
-
-#include "output.h"
-
-void output_render(struct cg_output *output, pixman_region32_t *damage);
-
-#endif

seat.c

@@ -6,21 +6,29 @@
  * See the LICENSE file accompanying this file.
  */
 
+#define _POSIX_C_SOURCE 200809L
+
 #include "config.h"
 
+#include <assert.h>
 #include <linux/input-event-codes.h>
 #include <stdlib.h>
+#include <string.h>
 #include <wayland-server-core.h>
 #include <wlr/backend.h>
 #include <wlr/backend/multi.h>
+#include <wlr/backend/session.h>
 #include <wlr/types/wlr_cursor.h>
 #include <wlr/types/wlr_data_device.h>
-#include <wlr/types/wlr_idle.h>
+#include <wlr/types/wlr_idle_notify_v1.h>
 #include <wlr/types/wlr_keyboard_group.h>
 #include <wlr/types/wlr_primary_selection.h>
+#include <wlr/types/wlr_relative_pointer_v1.h>
+#include <wlr/types/wlr_scene.h>
 #include <wlr/types/wlr_seat.h>
-#include <wlr/types/wlr_surface.h>
 #include <wlr/types/wlr_touch.h>
+#include <wlr/types/wlr_virtual_keyboard_v1.h>
+#include <wlr/types/wlr_virtual_pointer_v1.h>
 #include <wlr/types/wlr_xcursor_manager.h>
 #include <wlr/util/log.h>
 #if CAGE_HAS_XWAYLAND
@@ -41,42 +49,42 @@ static void drag_icon_update_position(struct cg_drag_icon *drag_icon);
  * menus or tooltips. This function tests if any of those are underneath the
  * coordinates lx and ly (in output Layout Coordinates). If so, it sets the
  * surface pointer to that wlr_surface and the sx and sy coordinates to the
- * coordinates relative to that surface's top-left corner. */
-static bool
-view_at(struct cg_view *view, double lx, double ly, struct wlr_surface **surface, double *sx, double *sy)
-{
-	double view_sx = lx - view->lx;
-	double view_sy = ly - view->ly;
-
-	double _sx, _sy;
-	struct wlr_surface *_surface = view_wlr_surface_at(view, view_sx, view_sy, &_sx, &_sy);
-	if (_surface != NULL) {
-		*sx = _sx;
-		*sy = _sy;
-		*surface = _surface;
-		return true;
-	}
-
-	return false;
-}
-
-/* This iterates over all of our surfaces and attempts to find one
- * under the cursor. This relies on server->views being ordered from
- * top-to-bottom. If desktop_view_at returns a view, there is also a
- * surface. There cannot be a surface without a view, either. It's
- * both or nothing. */
+ * coordinates relative to that surface's top-left corner.
+ *
+ * This function iterates over all of our surfaces and attempts to find one
+ * under the cursor. If desktop_view_at returns a view, there is also a
+ * surface. There cannot be a surface without a view, either. It's both or
+ * nothing.
+ */
 static struct cg_view *
 desktop_view_at(struct cg_server *server, double lx, double ly, struct wlr_surface **surface, double *sx, double *sy)
 {
-	struct cg_view *view;
-
-	wl_list_for_each (view, &server->views, link) {
-		if (view_at(view, lx, ly, surface, sx, sy)) {
-			return view;
-		}
+	struct wlr_scene_node *node = wlr_scene_node_at(&server->scene->tree.node, lx, ly, sx, sy);
+	if (node == NULL || node->type != WLR_SCENE_NODE_BUFFER) {
+		return NULL;
 	}
 
-	return NULL;
+	struct wlr_scene_buffer *scene_buffer = wlr_scene_buffer_from_node(node);
+	struct wlr_scene_surface *scene_surface = wlr_scene_surface_try_from_buffer(scene_buffer);
+	if (!scene_surface) {
+		return NULL;
+	}
+
+	*surface = scene_surface->surface;
+
+	/* Walk up the tree until we find a node with a data pointer. When done,
+	 * we've found the node representing the view. */
+	while (!node->data) {
+		if (!node->parent) {
+			node = NULL;
+			break;
+		}
+
+		node = &node->parent->node;
+	}
+
+	assert(node != NULL);
+	return node->data;
 }
 
 static void
@@ -120,23 +128,23 @@ update_capabilities(struct cg_seat *seat)
 
 	/* Hide cursor if the seat doesn't have pointer capability. */
 	if ((caps & WL_SEAT_CAPABILITY_POINTER) == 0) {
-		wlr_cursor_set_image(seat->cursor, NULL, 0, 0, 0, 0, 0, 0);
+		wlr_cursor_unset_image(seat->cursor);
 	} else {
-		wlr_xcursor_manager_set_cursor_image(seat->xcursor_manager, DEFAULT_XCURSOR, seat->cursor);
+		wlr_cursor_set_xcursor(seat->cursor, seat->xcursor_manager, DEFAULT_XCURSOR);
 	}
 }
 
 static void
-map_input_device_to_output(struct cg_seat *seat, struct wlr_input_device *device)
+map_input_device_to_output(struct cg_seat *seat, struct wlr_input_device *device, const char *output_name)
 {
-	if (!device->output_name) {
+	if (!output_name) {
 		wlr_log(WLR_INFO, "Input device %s cannot be mapped to an output device\n", device->name);
 		return;
 	}
 
 	struct cg_output *output;
 	wl_list_for_each (output, &seat->server->outputs, link) {
-		if (strcmp(device->output_name, output->wlr_output->name) == 0) {
+		if (strcmp(output_name, output->wlr_output->name) == 0) {
 			wlr_log(WLR_INFO, "Mapping input device %s to output device %s\n", device->name,
 				output->wlr_output->name);
 			wlr_cursor_map_input_to_output(seat->cursor, device, output->wlr_output);
@@ -154,7 +162,7 @@ handle_touch_destroy(struct wl_listener *listener, void *data)
 	struct cg_seat *seat = touch->seat;
 
 	wl_list_remove(&touch->link);
-	wlr_cursor_detach_input_device(seat->cursor, touch->device);
+	wlr_cursor_detach_input_device(seat->cursor, &touch->touch->base);
 	wl_list_remove(&touch->destroy.link);
 	free(touch);
 
@@ -162,7 +170,7 @@ handle_touch_destroy(struct wl_listener *listener, void *data)
 }
 
 static void
-handle_new_touch(struct cg_seat *seat, struct wlr_input_device *device)
+handle_new_touch(struct cg_seat *seat, struct wlr_touch *wlr_touch)
 {
 	struct cg_touch *touch = calloc(1, sizeof(struct cg_touch));
 	if (!touch) {
@@ -171,14 +179,14 @@ handle_new_touch(struct cg_seat *seat, struct wlr_input_device *device)
 	}
 
 	touch->seat = seat;
-	touch->device = device;
-	wlr_cursor_attach_input_device(seat->cursor, device);
+	touch->touch = wlr_touch;
+	wlr_cursor_attach_input_device(seat->cursor, &wlr_touch->base);
 
 	wl_list_insert(&seat->touch, &touch->link);
 	touch->destroy.notify = handle_touch_destroy;
-	wl_signal_add(&touch->device->events.destroy, &touch->destroy);
+	wl_signal_add(&wlr_touch->base.events.destroy, &touch->destroy);
 
-	map_input_device_to_output(seat, device);
+	map_input_device_to_output(seat, &wlr_touch->base, wlr_touch->output_name);
 }
 
 static void
@@ -188,7 +196,7 @@ handle_pointer_destroy(struct wl_listener *listener, void *data)
 	struct cg_seat *seat = pointer->seat;
 
 	wl_list_remove(&pointer->link);
-	wlr_cursor_detach_input_device(seat->cursor, pointer->device);
+	wlr_cursor_detach_input_device(seat->cursor, &pointer->pointer->base);
 	wl_list_remove(&pointer->destroy.link);
 	free(pointer);
 
@@ -196,7 +204,7 @@ handle_pointer_destroy(struct wl_listener *listener, void *data)
 }
 
 static void
-handle_new_pointer(struct cg_seat *seat, struct wlr_input_device *device)
+handle_new_pointer(struct cg_seat *seat, struct wlr_pointer *wlr_pointer)
 {
 	struct cg_pointer *pointer = calloc(1, sizeof(struct cg_pointer));
 	if (!pointer) {
@@ -205,23 +213,44 @@ handle_new_pointer(struct cg_seat *seat, struct wlr_input_device *device)
 	}
 
 	pointer->seat = seat;
-	pointer->device = device;
-	wlr_cursor_attach_input_device(seat->cursor, device);
+	pointer->pointer = wlr_pointer;
+	wlr_cursor_attach_input_device(seat->cursor, &wlr_pointer->base);
 
 	wl_list_insert(&seat->pointers, &pointer->link);
 	pointer->destroy.notify = handle_pointer_destroy;
-	wl_signal_add(&device->events.destroy, &pointer->destroy);
+	wl_signal_add(&wlr_pointer->base.events.destroy, &pointer->destroy);
 
-	map_input_device_to_output(seat, device);
+	map_input_device_to_output(seat, &wlr_pointer->base, wlr_pointer->output_name);
 }
 
 static void
-handle_modifier_event(struct wlr_input_device *device, struct cg_seat *seat)
+handle_virtual_pointer(struct wl_listener *listener, void *data)
 {
-	wlr_seat_set_keyboard(seat->seat, device);
-	wlr_seat_keyboard_notify_modifiers(seat->seat, &device->keyboard->modifiers);
+	struct cg_server *server = wl_container_of(listener, server, new_virtual_pointer);
+	struct cg_seat *seat = server->seat;
+	struct wlr_virtual_pointer_v1_new_pointer_event *event = data;
+	struct wlr_virtual_pointer_v1 *pointer = event->new_pointer;
+	struct wlr_pointer *wlr_pointer = &pointer->pointer;
 
-	wlr_idle_notify_activity(seat->server->idle, seat->seat);
+	/* We'll want to map the device back to an output later, this is a bit
+	 * sub-optimal (we could just keep the suggested_output), but just copy
+	 * its name so we do like other devices
+	 */
+	if (event->suggested_output != NULL) {
+		wlr_pointer->output_name = strdup(event->suggested_output->name);
+	}
+	/* TODO: event->suggested_seat should be checked if we handle multiple seats */
+	handle_new_pointer(seat, wlr_pointer);
+	update_capabilities(seat);
+}
+
+static void
+handle_modifier_event(struct wlr_keyboard *keyboard, struct cg_seat *seat)
+{
+	wlr_seat_set_keyboard(seat->seat, keyboard);
+	wlr_seat_keyboard_notify_modifiers(seat->seat, &keyboard->modifiers);
+
+	wlr_idle_notifier_v1_notify_activity(seat->server->idle, seat->seat);
 }
 
 static bool
@@ -229,38 +258,37 @@ handle_keybinding(struct cg_server *server, xkb_keysym_t sym)
 {
 #ifdef DEBUG
 	if (sym == XKB_KEY_Escape) {
-		wl_display_terminate(server->wl_display);
+		server_terminate(server);
 		return true;
 	}
 #endif
 	if (server->allow_vt_switch && sym >= XKB_KEY_XF86Switch_VT_1 && sym <= XKB_KEY_XF86Switch_VT_12) {
 		if (wlr_backend_is_multi(server->backend)) {
-			struct wlr_session *session = wlr_backend_get_session(server->backend);
-			if (session) {
+			if (server->session) {
 				unsigned vt = sym - XKB_KEY_XF86Switch_VT_1 + 1;
-				wlr_session_change_vt(session, vt);
+				wlr_session_change_vt(server->session, vt);
 			}
 		}
 	} else {
 		return false;
 	}
-	wlr_idle_notify_activity(server->idle, server->seat->seat);
+	wlr_idle_notifier_v1_notify_activity(server->idle, server->seat->seat);
 	return true;
 }
 
 static void
-handle_key_event(struct wlr_input_device *device, struct cg_seat *seat, void *data)
+handle_key_event(struct wlr_keyboard *keyboard, struct cg_seat *seat, void *data)
 {
-	struct wlr_event_keyboard_key *event = data;
+	struct wlr_keyboard_key_event *event = data;
 
 	/* Translate from libinput keycode to an xkbcommon keycode. */
 	xkb_keycode_t keycode = event->keycode + 8;
 
 	const xkb_keysym_t *syms;
-	int nsyms = xkb_state_key_get_syms(device->keyboard->xkb_state, keycode, &syms);
+	int nsyms = xkb_state_key_get_syms(keyboard->xkb_state, keycode, &syms);
 
 	bool handled = false;
-	uint32_t modifiers = wlr_keyboard_get_modifiers(device->keyboard);
+	uint32_t modifiers = wlr_keyboard_get_modifiers(keyboard);
 	if ((modifiers & WLR_MODIFIER_ALT) && event->state == WL_KEYBOARD_KEY_STATE_PRESSED) {
 		/* If Alt is held down and this button was pressed, we
 		 * attempt to process it as a compositor
@@ -272,38 +300,43 @@ handle_key_event(struct wlr_input_device *device, struct cg_seat *seat, void *da
 
 	if (!handled) {
 		/* Otherwise, we pass it along to the client. */
-		wlr_seat_set_keyboard(seat->seat, device);
+		wlr_seat_set_keyboard(seat->seat, keyboard);
 		wlr_seat_keyboard_notify_key(seat->seat, event->time_msec, event->keycode, event->state);
 	}
 
-	wlr_idle_notify_activity(seat->server->idle, seat->seat);
+	wlr_idle_notifier_v1_notify_activity(seat->server->idle, seat->seat);
 }
 
 static void
 handle_keyboard_group_key(struct wl_listener *listener, void *data)
 {
 	struct cg_keyboard_group *cg_group = wl_container_of(listener, cg_group, key);
-	handle_key_event(cg_group->wlr_group->input_device, cg_group->seat, data);
+	handle_key_event(&cg_group->wlr_group->keyboard, cg_group->seat, data);
 }
 
 static void
 handle_keyboard_group_modifiers(struct wl_listener *listener, void *data)
 {
 	struct cg_keyboard_group *group = wl_container_of(listener, group, modifiers);
-	handle_modifier_event(group->wlr_group->input_device, group->seat);
+	handle_modifier_event(&group->wlr_group->keyboard, group->seat);
 }
 
 static void
-cg_keyboard_group_add(struct wlr_input_device *device, struct cg_seat *seat)
+cg_keyboard_group_add(struct wlr_keyboard *keyboard, struct cg_seat *seat, bool virtual)
 {
-	struct wlr_keyboard *wlr_keyboard = device->keyboard;
-
-	struct cg_keyboard_group *group;
-	wl_list_for_each (group, &seat->keyboard_groups, link) {
-		struct wlr_keyboard_group *wlr_group = group->wlr_group;
-		if (wlr_keyboard_group_add_keyboard(wlr_group, wlr_keyboard)) {
-			wlr_log(WLR_DEBUG, "Added new keyboard to existing group");
-			return;
+	/* We apparently should not group virtual keyboards,
+	 * so create a new group with it
+	 */
+	if (!virtual) {
+		struct cg_keyboard_group *group;
+		wl_list_for_each (group, &seat->keyboard_groups, link) {
+			if (group->is_virtual)
+				continue;
+			struct wlr_keyboard_group *wlr_group = group->wlr_group;
+			if (wlr_keyboard_group_add_keyboard(wlr_group, keyboard)) {
+				wlr_log(WLR_DEBUG, "Added new keyboard to existing group");
+				return;
+			}
 		}
 	}
 
@@ -315,6 +348,7 @@ cg_keyboard_group_add(struct wlr_input_device *device, struct cg_seat *seat)
 		return;
 	}
 	cg_group->seat = seat;
+	cg_group->is_virtual = virtual;
 	cg_group->wlr_group = wlr_keyboard_group_create();
 	if (cg_group->wlr_group == NULL) {
 		wlr_log(WLR_ERROR, "Failed to create wlr keyboard group.");
@@ -322,14 +356,14 @@ cg_keyboard_group_add(struct wlr_input_device *device, struct cg_seat *seat)
 	}
 
 	cg_group->wlr_group->data = cg_group;
-	wlr_keyboard_set_keymap(&cg_group->wlr_group->keyboard, device->keyboard->keymap);
+	wlr_keyboard_set_keymap(&cg_group->wlr_group->keyboard, keyboard->keymap);
 
-	wlr_keyboard_set_repeat_info(&cg_group->wlr_group->keyboard, wlr_keyboard->repeat_info.rate,
-				     wlr_keyboard->repeat_info.delay);
+	wlr_keyboard_set_repeat_info(&cg_group->wlr_group->keyboard, keyboard->repeat_info.rate,
+				     keyboard->repeat_info.delay);
 
 	wlr_log(WLR_DEBUG, "Created keyboard group");
 
-	wlr_keyboard_group_add_keyboard(cg_group->wlr_group, wlr_keyboard);
+	wlr_keyboard_group_add_keyboard(cg_group->wlr_group, keyboard);
 	wl_list_insert(&seat->keyboard_groups, &cg_group->link);
 
 	wl_signal_add(&cg_group->wlr_group->keyboard.events.key, &cg_group->key);
@@ -347,36 +381,55 @@ cleanup:
 }
 
 static void
-handle_new_keyboard(struct cg_seat *seat, struct wlr_input_device *device)
+keyboard_group_destroy(struct cg_keyboard_group *keyboard_group)
+{
+	wl_list_remove(&keyboard_group->key.link);
+	wl_list_remove(&keyboard_group->modifiers.link);
+	wlr_keyboard_group_destroy(keyboard_group->wlr_group);
+	wl_list_remove(&keyboard_group->link);
+	free(keyboard_group);
+}
+
+static void
+handle_new_keyboard(struct cg_seat *seat, struct wlr_keyboard *keyboard, bool virtual)
 {
 	struct xkb_context *context = xkb_context_new(XKB_CONTEXT_NO_FLAGS);
 	if (!context) {
-		wlr_log(WLR_ERROR, "Unable to create XBK context");
+		wlr_log(WLR_ERROR, "Unable to create XKB context");
 		return;
 	}
 
-	struct xkb_rule_names rules = {0};
-	rules.rules = getenv("XKB_DEFAULT_RULES");
-	rules.model = getenv("XKB_DEFAULT_MODEL");
-	rules.layout = getenv("XKB_DEFAULT_LAYOUT");
-	rules.variant = getenv("XKB_DEFAULT_VARIANT");
-	rules.options = getenv("XKB_DEFAULT_OPTIONS");
-	struct xkb_keymap *keymap = xkb_map_new_from_names(context, &rules, XKB_KEYMAP_COMPILE_NO_FLAGS);
+	struct xkb_keymap *keymap = xkb_keymap_new_from_names(context, NULL, XKB_KEYMAP_COMPILE_NO_FLAGS);
 	if (!keymap) {
 		wlr_log(WLR_ERROR, "Unable to configure keyboard: keymap does not exist");
 		xkb_context_unref(context);
 		return;
 	}
 
-	wlr_keyboard_set_keymap(device->keyboard, keymap);
+	wlr_keyboard_set_keymap(keyboard, keymap);
 
 	xkb_keymap_unref(keymap);
 	xkb_context_unref(context);
-	wlr_keyboard_set_repeat_info(device->keyboard, 25, 600);
+	wlr_keyboard_set_repeat_info(keyboard, 25, 600);
 
-	cg_keyboard_group_add(device, seat);
+	cg_keyboard_group_add(keyboard, seat, virtual);
 
-	wlr_seat_set_keyboard(seat->seat, device);
+	wlr_seat_set_keyboard(seat->seat, keyboard);
+}
+
+static void
+handle_virtual_keyboard(struct wl_listener *listener, void *data)
+{
+	struct cg_server *server = wl_container_of(listener, server, new_virtual_keyboard);
+	struct cg_seat *seat = server->seat;
+	struct wlr_virtual_keyboard_v1 *keyboard = data;
+	struct wlr_keyboard *wlr_keyboard = &keyboard->keyboard;
+
+	/* TODO: If multiple seats are supported, check keyboard->seat
+	 * to select the appropriate one */
+
+	handle_new_keyboard(seat, wlr_keyboard, true);
+	update_capabilities(seat);
 }
 
 static void
@@ -387,18 +440,18 @@ handle_new_input(struct wl_listener *listener, void *data)
 
 	switch (device->type) {
 	case WLR_INPUT_DEVICE_KEYBOARD:
-		handle_new_keyboard(seat, device);
+		handle_new_keyboard(seat, wlr_keyboard_from_input_device(device), false);
 		break;
 	case WLR_INPUT_DEVICE_POINTER:
-		handle_new_pointer(seat, device);
+		handle_new_pointer(seat, wlr_pointer_from_input_device(device));
 		break;
 	case WLR_INPUT_DEVICE_TOUCH:
-		handle_new_touch(seat, device);
+		handle_new_touch(seat, wlr_touch_from_input_device(device));
 		break;
 	case WLR_INPUT_DEVICE_SWITCH:
 		wlr_log(WLR_DEBUG, "Switch input is not implemented");
 		return;
-	case WLR_INPUT_DEVICE_TABLET_TOOL:
+	case WLR_INPUT_DEVICE_TABLET:
 	case WLR_INPUT_DEVICE_TABLET_PAD:
 		wlr_log(WLR_DEBUG, "Tablet input is not implemented");
 		return;
@@ -448,10 +501,10 @@ static void
 handle_touch_down(struct wl_listener *listener, void *data)
 {
 	struct cg_seat *seat = wl_container_of(listener, seat, touch_down);
-	struct wlr_event_touch_down *event = data;
+	struct wlr_touch_down_event *event = data;
 
 	double lx, ly;
-	wlr_cursor_absolute_to_layout_coords(seat->cursor, event->device, event->x, event->y, &lx, &ly);
+	wlr_cursor_absolute_to_layout_coords(seat->cursor, &event->touch->base, event->x, event->y, &lx, &ly);
 
 	double sx, sy;
 	struct wlr_surface *surface;
@@ -466,43 +519,43 @@ handle_touch_down(struct wl_listener *listener, void *data)
 		seat->touch_id = event->touch_id;
 		seat->touch_lx = lx;
 		seat->touch_ly = ly;
-		press_cursor_button(seat, event->device, event->time_msec, BTN_LEFT, WLR_BUTTON_PRESSED, lx, ly);
+		press_cursor_button(seat, &event->touch->base, event->time_msec, BTN_LEFT, WLR_BUTTON_PRESSED, lx, ly);
 	}
 
-	wlr_idle_notify_activity(seat->server->idle, seat->seat);
+	wlr_idle_notifier_v1_notify_activity(seat->server->idle, seat->seat);
 }
 
 static void
 handle_touch_up(struct wl_listener *listener, void *data)
 {
 	struct cg_seat *seat = wl_container_of(listener, seat, touch_up);
-	struct wlr_event_touch_up *event = data;
+	struct wlr_touch_up_event *event = data;
 
 	if (!wlr_seat_touch_get_point(seat->seat, event->touch_id)) {
 		return;
 	}
 
 	if (wlr_seat_touch_num_points(seat->seat) == 1) {
-		press_cursor_button(seat, event->device, event->time_msec, BTN_LEFT, WLR_BUTTON_RELEASED,
+		press_cursor_button(seat, &event->touch->base, event->time_msec, BTN_LEFT, WLR_BUTTON_RELEASED,
 				    seat->touch_lx, seat->touch_ly);
 	}
 
 	wlr_seat_touch_notify_up(seat->seat, event->time_msec, event->touch_id);
-	wlr_idle_notify_activity(seat->server->idle, seat->seat);
+	wlr_idle_notifier_v1_notify_activity(seat->server->idle, seat->seat);
 }
 
 static void
 handle_touch_motion(struct wl_listener *listener, void *data)
 {
 	struct cg_seat *seat = wl_container_of(listener, seat, touch_motion);
-	struct wlr_event_touch_motion *event = data;
+	struct wlr_touch_motion_event *event = data;
 
 	if (!wlr_seat_touch_get_point(seat->seat, event->touch_id)) {
 		return;
 	}
 
 	double lx, ly;
-	wlr_cursor_absolute_to_layout_coords(seat->cursor, event->device, event->x, event->y, &lx, &ly);
+	wlr_cursor_absolute_to_layout_coords(seat->cursor, &event->touch->base, event->x, event->y, &lx, &ly);
 
 	double sx, sy;
 	struct wlr_surface *surface;
@@ -520,7 +573,16 @@ handle_touch_motion(struct wl_listener *listener, void *data)
 		seat->touch_ly = ly;
 	}
 
-	wlr_idle_notify_activity(seat->server->idle, seat->seat);
+	wlr_idle_notifier_v1_notify_activity(seat->server->idle, seat->seat);
+}
+
+static void
+handle_touch_frame(struct wl_listener *listener, void *data)
+{
+	struct cg_seat *seat = wl_container_of(listener, seat, touch_frame);
+
+	wlr_seat_touch_notify_frame(seat->seat);
+	wlr_idle_notifier_v1_notify_activity(seat->server->idle, seat->seat);
 }
 
 static void
@@ -529,50 +591,52 @@ handle_cursor_frame(struct wl_listener *listener, void *data)
 	struct cg_seat *seat = wl_container_of(listener, seat, cursor_frame);
 
 	wlr_seat_pointer_notify_frame(seat->seat);
-	wlr_idle_notify_activity(seat->server->idle, seat->seat);
+	wlr_idle_notifier_v1_notify_activity(seat->server->idle, seat->seat);
 }
 
 static void
 handle_cursor_axis(struct wl_listener *listener, void *data)
 {
 	struct cg_seat *seat = wl_container_of(listener, seat, cursor_axis);
-	struct wlr_event_pointer_axis *event = data;
+	struct wlr_pointer_axis_event *event = data;
 
 	wlr_seat_pointer_notify_axis(seat->seat, event->time_msec, event->orientation, event->delta,
-				     event->delta_discrete, event->source);
-	wlr_idle_notify_activity(seat->server->idle, seat->seat);
+				     event->delta_discrete, event->source, event->relative_direction);
+	wlr_idle_notifier_v1_notify_activity(seat->server->idle, seat->seat);
 }
 
 static void
 handle_cursor_button(struct wl_listener *listener, void *data)
 {
 	struct cg_seat *seat = wl_container_of(listener, seat, cursor_button);
-	struct wlr_event_pointer_button *event = data;
+	struct wlr_pointer_button_event *event = data;
 
 	wlr_seat_pointer_notify_button(seat->seat, event->time_msec, event->button, event->state);
-	press_cursor_button(seat, event->device, event->time_msec, event->button, event->state, seat->cursor->x,
+	press_cursor_button(seat, &event->pointer->base, event->time_msec, event->button, event->state, seat->cursor->x,
 			    seat->cursor->y);
-	wlr_idle_notify_activity(seat->server->idle, seat->seat);
+	wlr_idle_notifier_v1_notify_activity(seat->server->idle, seat->seat);
 }
 
 static void
-process_cursor_motion(struct cg_seat *seat, uint32_t time)
+process_cursor_motion(struct cg_seat *seat, uint32_t time_msec, double dx, double dy, double dx_unaccel,
+		      double dy_unaccel)
 {
 	double sx, sy;
 	struct wlr_seat *wlr_seat = seat->seat;
 	struct wlr_surface *surface = NULL;
 
 	struct cg_view *view = desktop_view_at(seat->server, seat->cursor->x, seat->cursor->y, &surface, &sx, &sy);
-
 	if (!view) {
 		wlr_seat_pointer_clear_focus(wlr_seat);
 	} else {
 		wlr_seat_pointer_notify_enter(wlr_seat, surface, sx, sy);
+		wlr_seat_pointer_notify_motion(wlr_seat, time_msec, sx, sy);
+	}
 
-		bool focus_changed = wlr_seat->pointer_state.focused_surface != surface;
-		if (!focus_changed && time > 0) {
-			wlr_seat_pointer_notify_motion(wlr_seat, time, sx, sy);
-		}
+	if (dx != 0 || dy != 0) {
+		wlr_relative_pointer_manager_v1_send_relative_motion(seat->server->relative_pointer_manager, wlr_seat,
+								     (uint64_t) time_msec * 1000, dx, dy, dx_unaccel,
+								     dy_unaccel);
 	}
 
 	struct cg_drag_icon *drag_icon;
@@ -580,38 +644,36 @@ process_cursor_motion(struct cg_seat *seat, uint32_t time)
 		drag_icon_update_position(drag_icon);
 	}
 
-	wlr_idle_notify_activity(seat->server->idle, seat->seat);
+	wlr_idle_notifier_v1_notify_activity(seat->server->idle, seat->seat);
 }
 
 static void
 handle_cursor_motion_absolute(struct wl_listener *listener, void *data)
 {
 	struct cg_seat *seat = wl_container_of(listener, seat, cursor_motion_absolute);
-	struct wlr_event_pointer_motion_absolute *event = data;
+	struct wlr_pointer_motion_absolute_event *event = data;
 
-	wlr_cursor_warp_absolute(seat->cursor, event->device, event->x, event->y);
-	process_cursor_motion(seat, event->time_msec);
-	wlr_idle_notify_activity(seat->server->idle, seat->seat);
+	double lx, ly;
+	wlr_cursor_absolute_to_layout_coords(seat->cursor, &event->pointer->base, event->x, event->y, &lx, &ly);
+
+	double dx = lx - seat->cursor->x;
+	double dy = ly - seat->cursor->y;
+
+	wlr_cursor_warp_absolute(seat->cursor, &event->pointer->base, event->x, event->y);
+	process_cursor_motion(seat, event->time_msec, dx, dy, dx, dy);
+	wlr_idle_notifier_v1_notify_activity(seat->server->idle, seat->seat);
 }
 
 static void
-handle_cursor_motion(struct wl_listener *listener, void *data)
+handle_cursor_motion_relative(struct wl_listener *listener, void *data)
 {
-	struct cg_seat *seat = wl_container_of(listener, seat, cursor_motion);
-	struct wlr_event_pointer_motion *event = data;
+	struct cg_seat *seat = wl_container_of(listener, seat, cursor_motion_relative);
+	struct wlr_pointer_motion_event *event = data;
 
-	wlr_cursor_move(seat->cursor, event->device, event->delta_x, event->delta_y);
-	process_cursor_motion(seat, event->time_msec);
-	wlr_idle_notify_activity(seat->server->idle, seat->seat);
-}
-
-static void
-drag_icon_damage(struct cg_drag_icon *drag_icon)
-{
-	struct cg_output *output;
-	wl_list_for_each (output, &drag_icon->seat->server->outputs, link) {
-		output_damage_surface(output, drag_icon->wlr_drag_icon->surface, drag_icon->lx, drag_icon->ly, true);
-	}
+	wlr_cursor_move(seat->cursor, &event->pointer->base, event->delta_x, event->delta_y);
+	process_cursor_motion(seat, event->time_msec, event->delta_x, event->delta_y, event->unaccel_dx,
+			      event->unaccel_dy);
+	wlr_idle_notifier_v1_notify_activity(seat->server->idle, seat->seat);
 }
 
 static void
@@ -621,8 +683,6 @@ drag_icon_update_position(struct cg_drag_icon *drag_icon)
 	struct cg_seat *seat = drag_icon->seat;
 	struct wlr_touch_point *point;
 
-	drag_icon_damage(drag_icon);
-
 	switch (wlr_icon->drag->grab_type) {
 	case WLR_DRAG_GRAB_KEYBOARD:
 		return;
@@ -640,7 +700,7 @@ drag_icon_update_position(struct cg_drag_icon *drag_icon)
 		break;
 	}
 
-	drag_icon_damage(drag_icon);
+	wlr_scene_node_set_position(&drag_icon->scene_tree->node, drag_icon->lx, drag_icon->ly);
 }
 
 static void
@@ -650,6 +710,7 @@ handle_drag_icon_destroy(struct wl_listener *listener, void *data)
 
 	wl_list_remove(&drag_icon->link);
 	wl_list_remove(&drag_icon->destroy.link);
+	wlr_scene_node_destroy(&drag_icon->scene_tree->node);
 	free(drag_icon);
 }
 
@@ -692,6 +753,11 @@ handle_start_drag(struct wl_listener *listener, void *data)
 	}
 	drag_icon->seat = seat;
 	drag_icon->wlr_drag_icon = wlr_drag_icon;
+	drag_icon->scene_tree = wlr_scene_subsurface_tree_create(&seat->server->scene->tree, wlr_drag_icon->surface);
+	if (!drag_icon->scene_tree) {
+		free(drag_icon);
+		return;
+	}
 
 	drag_icon->destroy.notify = handle_drag_icon_destroy;
 	wl_signal_add(&wlr_drag_icon->events.destroy, &drag_icon->destroy);
@@ -706,7 +772,7 @@ handle_destroy(struct wl_listener *listener, void *data)
 {
 	struct cg_seat *seat = wl_container_of(listener, seat, destroy);
 	wl_list_remove(&seat->destroy.link);
-	wl_list_remove(&seat->cursor_motion.link);
+	wl_list_remove(&seat->cursor_motion_relative.link);
 	wl_list_remove(&seat->cursor_motion_absolute.link);
 	wl_list_remove(&seat->cursor_button.link);
 	wl_list_remove(&seat->cursor_axis.link);
@@ -714,6 +780,7 @@ handle_destroy(struct wl_listener *listener, void *data)
 	wl_list_remove(&seat->touch_down.link);
 	wl_list_remove(&seat->touch_up.link);
 	wl_list_remove(&seat->touch_motion.link);
+	wl_list_remove(&seat->touch_frame.link);
 	wl_list_remove(&seat->request_set_cursor.link);
 	wl_list_remove(&seat->request_set_selection.link);
 	wl_list_remove(&seat->request_set_primary_selection.link);
@@ -779,8 +846,8 @@ seat_create(struct cg_server *server, struct wlr_backend *backend)
 		}
 	}
 
-	seat->cursor_motion.notify = handle_cursor_motion;
-	wl_signal_add(&seat->cursor->events.motion, &seat->cursor_motion);
+	seat->cursor_motion_relative.notify = handle_cursor_motion_relative;
+	wl_signal_add(&seat->cursor->events.motion, &seat->cursor_motion_relative);
 	seat->cursor_motion_absolute.notify = handle_cursor_motion_absolute;
 	wl_signal_add(&seat->cursor->events.motion_absolute, &seat->cursor_motion_absolute);
 	seat->cursor_button.notify = handle_cursor_button;
@@ -796,6 +863,8 @@ seat_create(struct cg_server *server, struct wlr_backend *backend)
 	wl_signal_add(&seat->cursor->events.touch_up, &seat->touch_up);
 	seat->touch_motion.notify = handle_touch_motion;
 	wl_signal_add(&seat->cursor->events.touch_motion, &seat->touch_motion);
+	seat->touch_frame.notify = handle_touch_frame;
+	wl_signal_add(&seat->cursor->events.touch_frame, &seat->touch_frame);
 
 	seat->request_set_cursor.notify = handle_request_set_cursor;
 	wl_signal_add(&seat->seat->events.request_set_cursor, &seat->request_set_cursor);
@@ -812,6 +881,9 @@ seat_create(struct cg_server *server, struct wlr_backend *backend)
 	seat->new_input.notify = handle_new_input;
 	wl_signal_add(&backend->events.new_input, &seat->new_input);
 
+	server->new_virtual_keyboard.notify = handle_virtual_keyboard;
+	server->new_virtual_pointer.notify = handle_virtual_pointer;
+
 	wl_list_init(&seat->drag_icons);
 	seat->request_start_drag.notify = handle_request_start_drag;
 	wl_signal_add(&seat->seat->events.request_start_drag, &seat->request_start_drag);
@@ -831,6 +903,11 @@ seat_destroy(struct cg_seat *seat)
 	wl_list_remove(&seat->request_start_drag.link);
 	wl_list_remove(&seat->start_drag.link);
 
+	struct cg_keyboard_group *keyboard_group, *keyboard_group_tmp;
+	wl_list_for_each_safe (keyboard_group, keyboard_group_tmp, &seat->keyboard_groups, link) {
+		keyboard_group_destroy(keyboard_group);
+	}
+
 	// Destroying the wlr seat will trigger the destroy handler on our seat,
 	// which will in turn free it.
 	wlr_seat_destroy(seat->seat);
@@ -840,7 +917,10 @@ struct cg_view *
 seat_get_focus(struct cg_seat *seat)
 {
 	struct wlr_surface *prev_surface = seat->seat->keyboard_state.focused_surface;
-	return view_from_wlr_surface(seat->server, prev_surface);
+	if (!prev_surface) {
+		return NULL;
+	}
+	return view_from_wlr_surface(prev_surface);
 }
 
 void
@@ -857,7 +937,7 @@ seat_set_focus(struct cg_seat *seat, struct cg_view *view)
 #if CAGE_HAS_XWAYLAND
 	if (view->type == CAGE_XWAYLAND_VIEW) {
 		struct cg_xwayland_view *xwayland_view = xwayland_view_from_view(view);
-		if (!wlr_xwayland_or_surface_wants_focus(xwayland_view->xwayland_surface)) {
+		if (!wlr_xwayland_surface_override_redirect_wants_focus(xwayland_view->xwayland_surface)) {
 			return;
 		}
 	}
@@ -890,5 +970,14 @@ seat_set_focus(struct cg_seat *seat, struct cg_view *view)
 		wlr_seat_keyboard_notify_enter(wlr_seat, view->wlr_surface, NULL, 0, NULL);
 	}
 
-	process_cursor_motion(seat, -1);
+	process_cursor_motion(seat, -1, 0, 0, 0, 0);
+}
+
+void
+seat_center_cursor(struct cg_seat *seat)
+{
+	/* Place the cursor in the center of the output layout. */
+	struct wlr_box layout_box;
+	wlr_output_layout_get_box(seat->server->output_layout, NULL, &layout_box);
+	wlr_cursor_warp(seat->cursor, NULL, layout_box.width / 2, layout_box.height / 2);
 }

seat.h

@@ -27,7 +27,7 @@ struct cg_seat {
 
 	struct wlr_cursor *cursor;
 	struct wlr_xcursor_manager *xcursor_manager;
-	struct wl_listener cursor_motion;
+	struct wl_listener cursor_motion_relative;
 	struct wl_listener cursor_motion_absolute;
 	struct wl_listener cursor_button;
 	struct wl_listener cursor_axis;
@@ -39,6 +39,7 @@ struct cg_seat {
 	struct wl_listener touch_down;
 	struct wl_listener touch_up;
 	struct wl_listener touch_motion;
+	struct wl_listener touch_frame;
 
 	struct wl_list drag_icons;
 	struct wl_listener request_start_drag;
@@ -55,12 +56,13 @@ struct cg_keyboard_group {
 	struct wl_listener key;
 	struct wl_listener modifiers;
 	struct wl_list link; // cg_seat::keyboard_groups
+	bool is_virtual;
 };
 
 struct cg_pointer {
 	struct wl_list link; // seat::pointers
 	struct cg_seat *seat;
-	struct wlr_input_device *device;
+	struct wlr_pointer *pointer;
 
 	struct wl_listener destroy;
 };
@@ -68,7 +70,7 @@ struct cg_pointer {
 struct cg_touch {
 	struct wl_list link; // seat::touch
 	struct cg_seat *seat;
-	struct wlr_input_device *device;
+	struct wlr_touch *touch;
 
 	struct wl_listener destroy;
 };
@@ -77,6 +79,7 @@ struct cg_drag_icon {
 	struct wl_list link; // seat::drag_icons
 	struct cg_seat *seat;
 	struct wlr_drag_icon *wlr_drag_icon;
+	struct wlr_scene_tree *scene_tree;
 
 	/* The drag icon has a position in layout coordinates. */
 	double lx, ly;
@@ -88,5 +91,6 @@ struct cg_seat *seat_create(struct cg_server *server, struct wlr_backend *backen
 void seat_destroy(struct cg_seat *seat);
 struct cg_view *seat_get_focus(struct cg_seat *seat);
 void seat_set_focus(struct cg_seat *seat, struct cg_view *view);
+void seat_center_cursor(struct cg_seat *seat);
 
 #endif

server.h

@@ -4,18 +4,17 @@
 #include "config.h"
 
 #include <wayland-server-core.h>
-#include <wlr/types/wlr_idle.h>
 #include <wlr/types/wlr_idle_inhibit_v1.h>
+#include <wlr/types/wlr_idle_notify_v1.h>
 #include <wlr/types/wlr_output_layout.h>
+#include <wlr/types/wlr_relative_pointer_v1.h>
 #include <wlr/types/wlr_xdg_decoration_v1.h>
+#include <wlr/util/log.h>
+
 #if CAGE_HAS_XWAYLAND
 #include <wlr/xwayland.h>
 #endif
 
-#include "output.h"
-#include "seat.h"
-#include "view.h"
-
 enum cg_multi_output_mode {
 	CAGE_MULTI_OUTPUT_MODE_EXTEND,
 	CAGE_MULTI_OUTPUT_MODE_LAST,
@@ -25,32 +24,50 @@ struct cg_server {
 	struct wl_display *wl_display;
 	struct wl_list views;
 	struct wlr_backend *backend;
+	struct wlr_renderer *renderer;
+	struct wlr_allocator *allocator;
+	struct wlr_session *session;
+	struct wl_listener display_destroy;
 
 	struct cg_seat *seat;
-	struct wlr_idle *idle;
+	struct wlr_idle_notifier_v1 *idle;
 	struct wlr_idle_inhibit_manager_v1 *idle_inhibit_v1;
 	struct wl_listener new_idle_inhibitor_v1;
 	struct wl_list inhibitors;
 
 	enum cg_multi_output_mode output_mode;
 	struct wlr_output_layout *output_layout;
+	struct wlr_scene_output_layout *scene_output_layout;
+
+	struct wlr_scene *scene;
 	/* Includes disabled outputs; depending on the output_mode
 	 * some outputs may be disabled. */
 	struct wl_list outputs; // cg_output::link
 	struct wl_listener new_output;
+	struct wl_listener output_layout_change;
 
 	struct wl_listener xdg_toplevel_decoration;
-	struct wl_listener new_xdg_shell_surface;
+	struct wl_listener new_xdg_toplevel;
+	struct wl_listener new_xdg_popup;
+
+	struct wl_listener new_virtual_keyboard;
+	struct wl_listener new_virtual_pointer;
 #if CAGE_HAS_XWAYLAND
 	struct wl_listener new_xwayland_surface;
 #endif
+	struct wlr_output_manager_v1 *output_manager_v1;
+	struct wl_listener output_manager_apply;
+	struct wl_listener output_manager_test;
+
+	struct wlr_relative_pointer_manager_v1 *relative_pointer_manager;
 
 	bool xdg_decoration;
 	bool allow_vt_switch;
-	enum wl_output_transform output_transform;
-#ifdef DEBUG
-	bool debug_damage_tracking;
-#endif
+	bool return_app_code;
+	bool terminated;
+	enum wlr_log_importance log_level;
 };
 
+void server_terminate(struct cg_server *server);
+
 #endif

util.c

@@ -1,36 +0,0 @@
-/*
- * Cage: A Wayland kiosk.
- *
- * Copyright (C) 2019 The Sway authors
- *
- * See the LICENSE file accompanying this file.
- */
-
-#include <wlr/types/wlr_box.h>
-
-#include "util.h"
-
-int
-scale_length(int length, int offset, float scale)
-{
-	/**
-	 * One does not simply multiply the width by the scale. We allow fractional
-	 * scaling, which means the resulting scaled width might be a decimal.
-	 * So we round it.
-	 *
-	 * But even this can produce undesirable results depending on the X or Y
-	 * offset of the box. For example, with a scale of 1.5, a box with
-	 * width=1 should not scale to 2px if its X coordinate is 1, because the
-	 * X coordinate would have scaled to 2px.
-	 */
-	return round((offset + length) * scale) - round(offset * scale);
-}
-
-void
-scale_box(struct wlr_box *box, float scale)
-{
-	box->width = scale_length(box->width, box->x, scale);
-	box->height = scale_length(box->height, box->y, scale);
-	box->x = round(box->x * scale);
-	box->y = round(box->y * scale);
-}

util.h

@@ -1,11 +0,0 @@
-#ifndef CG_UTIL_H
-#define CG_UTIL_H
-
-#include <wlr/types/wlr_box.h>
-
-/** Apply scale to a width or height. */
-int scale_length(int length, int offset, float scale);
-
-void scale_box(struct wlr_box *box, float scale);
-
-#endif

view.c

@@ -1,20 +1,20 @@
 /*
  * Cage: A Wayland kiosk.
  *
- * Copyright (C) 2018-2020 Jente Hidskes
+ * Copyright (C) 2018-2021 Jente Hidskes
  *
  * See the LICENSE file accompanying this file.
  */
 
 #define _POSIX_C_SOURCE 200809L
 
+#include <assert.h>
 #include <stdbool.h>
 #include <stdlib.h>
 #include <string.h>
 #include <wayland-server-core.h>
-#include <wlr/types/wlr_box.h>
 #include <wlr/types/wlr_output.h>
-#include <wlr/types/wlr_surface.h>
+#include <wlr/types/wlr_scene.h>
 
 #include "output.h"
 #include "seat.h"
@@ -24,96 +24,6 @@
 #include "xwayland.h"
 #endif
 
-static void
-view_child_handle_commit(struct wl_listener *listener, void *data)
-{
-	struct cg_view_child *child = wl_container_of(listener, child, commit);
-	view_damage_part(child->view);
-}
-
-static void subsurface_create(struct cg_view *view, struct wlr_subsurface *wlr_subsurface);
-
-static void
-view_child_handle_new_subsurface(struct wl_listener *listener, void *data)
-{
-	struct cg_view_child *child = wl_container_of(listener, child, new_subsurface);
-	struct wlr_subsurface *wlr_subsurface = data;
-	subsurface_create(child->view, wlr_subsurface);
-}
-
-void
-view_child_finish(struct cg_view_child *child)
-{
-	if (!child) {
-		return;
-	}
-
-	view_damage_whole(child->view);
-
-	wl_list_remove(&child->link);
-	wl_list_remove(&child->commit.link);
-	wl_list_remove(&child->new_subsurface.link);
-}
-
-void
-view_child_init(struct cg_view_child *child, struct cg_view *view, struct wlr_surface *wlr_surface)
-{
-	child->view = view;
-	child->wlr_surface = wlr_surface;
-
-	child->commit.notify = view_child_handle_commit;
-	wl_signal_add(&wlr_surface->events.commit, &child->commit);
-	child->new_subsurface.notify = view_child_handle_new_subsurface;
-	wl_signal_add(&wlr_surface->events.new_subsurface, &child->new_subsurface);
-
-	wl_list_insert(&view->children, &child->link);
-}
-
-static void
-subsurface_destroy(struct cg_view_child *child)
-{
-	if (!child) {
-		return;
-	}
-
-	struct cg_subsurface *subsurface = (struct cg_subsurface *) child;
-	wl_list_remove(&subsurface->destroy.link);
-	view_child_finish(&subsurface->view_child);
-	free(subsurface);
-}
-
-static void
-subsurface_handle_destroy(struct wl_listener *listener, void *data)
-{
-	struct cg_subsurface *subsurface = wl_container_of(listener, subsurface, destroy);
-	struct cg_view_child *view_child = (struct cg_view_child *) subsurface;
-	subsurface_destroy(view_child);
-}
-
-static void
-subsurface_create(struct cg_view *view, struct wlr_subsurface *wlr_subsurface)
-{
-	struct cg_subsurface *subsurface = calloc(1, sizeof(struct cg_subsurface));
-	if (!subsurface) {
-		return;
-	}
-
-	view_child_init(&subsurface->view_child, view, wlr_subsurface->surface);
-	subsurface->view_child.destroy = subsurface_destroy;
-	subsurface->wlr_subsurface = wlr_subsurface;
-
-	subsurface->destroy.notify = subsurface_handle_destroy;
-	wl_signal_add(&wlr_subsurface->events.destroy, &subsurface->destroy);
-}
-
-static void
-handle_new_subsurface(struct wl_listener *listener, void *data)
-{
-	struct cg_view *view = wl_container_of(listener, view, new_subsurface);
-	struct wlr_subsurface *wlr_subsurface = data;
-	subsurface_create(view, wlr_subsurface);
-}
-
 char *
 view_get_title(struct cg_view *view)
 {
@@ -136,24 +46,6 @@ view_is_transient_for(struct cg_view *child, struct cg_view *parent)
 	return child->impl->is_transient_for(child, parent);
 }
 
-void
-view_damage_part(struct cg_view *view)
-{
-	struct cg_output *output;
-	wl_list_for_each (output, &view->server->outputs, link) {
-		output_damage_surface(output, view->wlr_surface, view->lx, view->ly, false);
-	}
-}
-
-void
-view_damage_whole(struct cg_view *view)
-{
-	struct cg_output *output;
-	wl_list_for_each (output, &view->server->outputs, link) {
-		output_damage_surface(output, view->wlr_surface, view->lx, view->ly, true);
-	}
-}
-
 void
 view_activate(struct cg_view *view, bool activate)
 {
@@ -174,6 +66,11 @@ view_maximize(struct cg_view *view, struct wlr_box *layout_box)
 {
 	view->lx = layout_box->x;
 	view->ly = layout_box->y;
+
+	if (view->scene_tree) {
+		wlr_scene_node_set_position(&view->scene_tree->node, view->lx, view->ly);
+	}
+
 	view->impl->maximize(view, layout_box->width, layout_box->height);
 }
 
@@ -185,33 +82,32 @@ view_center(struct cg_view *view, struct wlr_box *layout_box)
 
 	view->lx = (layout_box->width - width) / 2;
 	view->ly = (layout_box->height - height) / 2;
+
+	if (view->scene_tree) {
+		wlr_scene_node_set_position(&view->scene_tree->node, view->lx, view->ly);
+	}
 }
 
 void
 view_position(struct cg_view *view)
 {
-	struct wlr_box *layout_box = wlr_output_layout_get_box(view->server->output_layout, NULL);
+	struct wlr_box layout_box;
+	wlr_output_layout_get_box(view->server->output_layout, NULL, &layout_box);
 
-	if (view_is_primary(view) || view_extends_output_layout(view, layout_box)) {
-		view_maximize(view, layout_box);
+	if (view_is_primary(view) || view_extends_output_layout(view, &layout_box)) {
+		view_maximize(view, &layout_box);
 	} else {
-		view_center(view, layout_box);
+		view_center(view, &layout_box);
 	}
 }
 
 void
-view_for_each_surface(struct cg_view *view, wlr_surface_iterator_func_t iterator, void *data)
+view_position_all(struct cg_server *server)
 {
-	view->impl->for_each_surface(view, iterator, data);
-}
-
-void
-view_for_each_popup_surface(struct cg_view *view, wlr_surface_iterator_func_t iterator, void *data)
-{
-	if (!view->impl->for_each_popup_surface) {
-		return;
+	struct cg_view *view;
+	wl_list_for_each (view, &server->views, link) {
+		view_position(view);
 	}
-	view->impl->for_each_popup_surface(view, iterator, data);
 }
 
 void
@@ -219,31 +115,24 @@ view_unmap(struct cg_view *view)
 {
 	wl_list_remove(&view->link);
 
-	wl_list_remove(&view->new_subsurface.link);
-
-	struct cg_view_child *child, *tmp;
-	wl_list_for_each_safe (child, tmp, &view->children, link) {
-		child->destroy(child);
-	}
+	wlr_scene_node_destroy(&view->scene_tree->node);
 
+	view->wlr_surface->data = NULL;
 	view->wlr_surface = NULL;
 }
 
 void
 view_map(struct cg_view *view, struct wlr_surface *surface)
 {
+	view->scene_tree = wlr_scene_subsurface_tree_create(&view->server->scene->tree, surface);
+	if (!view->scene_tree) {
+		wl_resource_post_no_memory(surface->resource);
+		return;
+	}
+	view->scene_tree->node.data = view;
+
 	view->wlr_surface = surface;
-
-	struct wlr_subsurface *subsurface;
-	wl_list_for_each (subsurface, &view->wlr_surface->subsurfaces_below, parent_link) {
-		subsurface_create(view, subsurface);
-	}
-	wl_list_for_each (subsurface, &view->wlr_surface->subsurfaces_above, parent_link) {
-		subsurface_create(view, subsurface);
-	}
-
-	view->new_subsurface.notify = handle_new_subsurface;
-	wl_signal_add(&view->wlr_surface->events.new_subsurface, &view->new_subsurface);
+	surface->data = view;
 
 #if CAGE_HAS_XWAYLAND
 	/* We shouldn't position override-redirect windows. They set
@@ -283,24 +172,11 @@ view_init(struct cg_view *view, struct cg_server *server, enum cg_view_type type
 	view->server = server;
 	view->type = type;
 	view->impl = impl;
-
-	wl_list_init(&view->children);
 }
 
 struct cg_view *
-view_from_wlr_surface(struct cg_server *server, struct wlr_surface *surface)
+view_from_wlr_surface(struct wlr_surface *surface)
 {
-	struct cg_view *view;
-	wl_list_for_each (view, &server->views, link) {
-		if (view->wlr_surface == surface) {
-			return view;
-		}
-	}
-	return NULL;
-}
-
-struct wlr_surface *
-view_wlr_surface_at(struct cg_view *view, double sx, double sy, double *sub_x, double *sub_y)
-{
-	return view->impl->wlr_surface_at(view, sx, sy, sub_x, sub_y);
+	assert(surface);
+	return surface->data;
 }

view.h

@@ -5,9 +5,9 @@
 
 #include <stdbool.h>
 #include <wayland-server-core.h>
-#include <wlr/types/wlr_box.h>
-#include <wlr/types/wlr_surface.h>
+#include <wlr/types/wlr_compositor.h>
 #include <wlr/types/wlr_xdg_shell.h>
+#include <wlr/util/box.h>
 #if CAGE_HAS_XWAYLAND
 #include <wlr/xwayland.h>
 #endif
@@ -24,16 +24,14 @@ enum cg_view_type {
 struct cg_view {
 	struct cg_server *server;
 	struct wl_list link; // server::views
-	struct wl_list children; // cg_view_child::link
 	struct wlr_surface *wlr_surface;
+	struct wlr_scene_tree *scene_tree;
 
 	/* The view has a position in layout coordinates. */
 	int lx, ly;
 
 	enum cg_view_type type;
 	const struct cg_view_impl *impl;
-
-	struct wl_listener new_subsurface;
 };
 
 struct cg_view_impl {
@@ -44,47 +42,19 @@ struct cg_view_impl {
 	void (*activate)(struct cg_view *view, bool activate);
 	void (*maximize)(struct cg_view *view, int output_width, int output_height);
 	void (*destroy)(struct cg_view *view);
-	void (*for_each_surface)(struct cg_view *view, wlr_surface_iterator_func_t iterator, void *data);
-	void (*for_each_popup_surface)(struct cg_view *view, wlr_surface_iterator_func_t iterator, void *data);
-	struct wlr_surface *(*wlr_surface_at)(struct cg_view *view, double sx, double sy, double *sub_x, double *sub_y);
-};
-
-struct cg_view_child {
-	struct cg_view *view;
-	struct wlr_surface *wlr_surface;
-	struct wl_list link;
-
-	struct wl_listener commit;
-	struct wl_listener new_subsurface;
-
-	void (*destroy)(struct cg_view_child *child);
-};
-
-struct cg_subsurface {
-	struct cg_view_child view_child;
-	struct wlr_subsurface *wlr_subsurface;
-
-	struct wl_listener destroy;
 };
 
 char *view_get_title(struct cg_view *view);
 bool view_is_primary(struct cg_view *view);
 bool view_is_transient_for(struct cg_view *child, struct cg_view *parent);
-void view_damage_part(struct cg_view *view);
-void view_damage_whole(struct cg_view *view);
 void view_activate(struct cg_view *view, bool activate);
 void view_position(struct cg_view *view);
-void view_for_each_surface(struct cg_view *view, wlr_surface_iterator_func_t iterator, void *data);
-void view_for_each_popup_surface(struct cg_view *view, wlr_surface_iterator_func_t iterator, void *data);
+void view_position_all(struct cg_server *server);
 void view_unmap(struct cg_view *view);
 void view_map(struct cg_view *view, struct wlr_surface *surface);
 void view_destroy(struct cg_view *view);
 void view_init(struct cg_view *view, struct cg_server *server, enum cg_view_type type, const struct cg_view_impl *impl);
 
-struct cg_view *view_from_wlr_surface(struct cg_server *server, struct wlr_surface *surface);
-struct wlr_surface *view_wlr_surface_at(struct cg_view *view, double sx, double sy, double *sub_x, double *sub_y);
-
-void view_child_finish(struct cg_view_child *child);
-void view_child_init(struct cg_view_child *child, struct cg_view *view, struct wlr_surface *wlr_surface);
+struct cg_view *view_from_wlr_surface(struct wlr_surface *surface);
 
 #endif

xdg_shell.c

@@ -6,10 +6,11 @@
  * See the LICENSE file accompanying this file.
  */
 
+#include <assert.h>
 #include <stdbool.h>
 #include <stdlib.h>
 #include <wayland-server-core.h>
-#include <wlr/types/wlr_box.h>
+#include <wlr/types/wlr_scene.h>
 #include <wlr/types/wlr_xdg_shell.h>
 #include <wlr/util/log.h>
 
@@ -18,21 +19,9 @@
 #include "xdg_shell.h"
 
 static void
-xdg_decoration_handle_destroy(struct wl_listener *listener, void *data)
+xdg_decoration_set_mode(struct cg_xdg_decoration *xdg_decoration)
 {
-	struct cg_xdg_decoration *xdg_decoration = wl_container_of(listener, xdg_decoration, destroy);
-
-	wl_list_remove(&xdg_decoration->destroy.link);
-	wl_list_remove(&xdg_decoration->request_mode.link);
-	free(xdg_decoration);
-}
-
-static void
-xdg_decoration_handle_request_mode(struct wl_listener *listener, void *data)
-{
-	struct cg_xdg_decoration *xdg_decoration = wl_container_of(listener, xdg_decoration, request_mode);
 	enum wlr_xdg_toplevel_decoration_v1_mode mode;
-
 	if (xdg_decoration->server->xdg_decoration) {
 		mode = WLR_XDG_TOPLEVEL_DECORATION_V1_MODE_SERVER_SIDE;
 	} else {
@@ -42,104 +31,84 @@ xdg_decoration_handle_request_mode(struct wl_listener *listener, void *data)
 }
 
 static void
-xdg_popup_destroy(struct cg_view_child *child)
+xdg_decoration_handle_destroy(struct wl_listener *listener, void *data)
 {
-	if (!child) {
+	struct cg_xdg_decoration *xdg_decoration = wl_container_of(listener, xdg_decoration, destroy);
+
+	wl_list_remove(&xdg_decoration->destroy.link);
+	wl_list_remove(&xdg_decoration->commit.link);
+	wl_list_remove(&xdg_decoration->request_mode.link);
+	free(xdg_decoration);
+}
+
+static void
+xdg_decoration_handle_commit(struct wl_listener *listener, void *data)
+{
+	struct cg_xdg_decoration *xdg_decoration = wl_container_of(listener, xdg_decoration, commit);
+
+	if (xdg_decoration->wlr_decoration->toplevel->base->initial_commit) {
+		xdg_decoration_set_mode(xdg_decoration);
+	}
+}
+
+static void
+xdg_decoration_handle_request_mode(struct wl_listener *listener, void *data)
+{
+	struct cg_xdg_decoration *xdg_decoration = wl_container_of(listener, xdg_decoration, request_mode);
+
+	if (xdg_decoration->wlr_decoration->toplevel->base->initialized) {
+		xdg_decoration_set_mode(xdg_decoration);
+	}
+}
+
+static struct cg_view *
+popup_get_view(struct wlr_xdg_popup *popup)
+{
+	while (true) {
+		if (popup->parent == NULL) {
+			return NULL;
+		}
+		struct wlr_xdg_surface *xdg_surface = wlr_xdg_surface_try_from_wlr_surface(popup->parent);
+		if (xdg_surface == NULL) {
+			return NULL;
+		}
+		switch (xdg_surface->role) {
+		case WLR_XDG_SURFACE_ROLE_TOPLEVEL:
+			return xdg_surface->data;
+		case WLR_XDG_SURFACE_ROLE_POPUP:
+			popup = xdg_surface->popup;
+			break;
+		case WLR_XDG_SURFACE_ROLE_NONE:
+			return NULL;
+		}
+	}
+}
+
+static void
+popup_unconstrain(struct wlr_xdg_popup *popup)
+{
+	struct cg_view *view = popup_get_view(popup);
+	if (view == NULL) {
 		return;
 	}
 
-	struct cg_xdg_popup *popup = (struct cg_xdg_popup *) child;
-	wl_list_remove(&popup->destroy.link);
-	wl_list_remove(&popup->map.link);
-	wl_list_remove(&popup->unmap.link);
-	wl_list_remove(&popup->new_popup.link);
-	view_child_finish(&popup->view_child);
-	free(popup);
-}
-
-static void
-handle_xdg_popup_map(struct wl_listener *listener, void *data)
-{
-	struct cg_xdg_popup *popup = wl_container_of(listener, popup, map);
-	view_damage_whole(popup->view_child.view);
-}
-
-static void
-handle_xdg_popup_unmap(struct wl_listener *listener, void *data)
-{
-	struct cg_xdg_popup *popup = wl_container_of(listener, popup, unmap);
-	view_damage_whole(popup->view_child.view);
-}
-
-static void
-handle_xdg_popup_destroy(struct wl_listener *listener, void *data)
-{
-	struct cg_xdg_popup *popup = wl_container_of(listener, popup, destroy);
-	struct cg_view_child *view_child = (struct cg_view_child *) popup;
-	xdg_popup_destroy(view_child);
-}
-
-static void xdg_popup_create(struct cg_view *view, struct wlr_xdg_popup *wlr_popup);
-
-static void
-popup_handle_new_xdg_popup(struct wl_listener *listener, void *data)
-{
-	struct cg_xdg_popup *popup = wl_container_of(listener, popup, new_popup);
-	struct wlr_xdg_popup *wlr_popup = data;
-	xdg_popup_create(popup->view_child.view, wlr_popup);
-}
-
-static void
-popup_unconstrain(struct cg_xdg_popup *popup)
-{
-	struct cg_view *view = popup->view_child.view;
 	struct cg_server *server = view->server;
-	struct wlr_box *popup_box = &popup->wlr_popup->geometry;
+	struct wlr_box *popup_box = &popup->current.geometry;
 
 	struct wlr_output_layout *output_layout = server->output_layout;
 	struct wlr_output *wlr_output =
 		wlr_output_layout_output_at(output_layout, view->lx + popup_box->x, view->ly + popup_box->y);
-	struct wlr_box *output_box = wlr_output_layout_get_box(output_layout, wlr_output);
+	struct wlr_box output_box;
+	wlr_output_layout_get_box(output_layout, wlr_output, &output_box);
 
 	struct wlr_box output_toplevel_box = {
-		.x = output_box->x - view->lx,
-		.y = output_box->y - view->ly,
-		.width = output_box->width,
-		.height = output_box->height,
+		.x = output_box.x - view->lx,
+		.y = output_box.y - view->ly,
+		.width = output_box.width,
+		.height = output_box.height,
 	};
 
-	wlr_xdg_popup_unconstrain_from_box(popup->wlr_popup, &output_toplevel_box);
-}
-
-static void
-xdg_popup_create(struct cg_view *view, struct wlr_xdg_popup *wlr_popup)
-{
-	struct cg_xdg_popup *popup = calloc(1, sizeof(struct cg_xdg_popup));
-	if (!popup) {
-		return;
-	}
-
-	popup->wlr_popup = wlr_popup;
-	view_child_init(&popup->view_child, view, wlr_popup->base->surface);
-	popup->view_child.destroy = xdg_popup_destroy;
-	popup->destroy.notify = handle_xdg_popup_destroy;
-	wl_signal_add(&wlr_popup->base->events.destroy, &popup->destroy);
-	popup->map.notify = handle_xdg_popup_map;
-	wl_signal_add(&wlr_popup->base->events.map, &popup->map);
-	popup->unmap.notify = handle_xdg_popup_unmap;
-	wl_signal_add(&wlr_popup->base->events.unmap, &popup->unmap);
-	popup->new_popup.notify = popup_handle_new_xdg_popup;
-	wl_signal_add(&wlr_popup->base->events.new_popup, &popup->new_popup);
-
-	popup_unconstrain(popup);
-}
-
-static void
-handle_new_xdg_popup(struct wl_listener *listener, void *data)
-{
-	struct cg_xdg_shell_view *xdg_shell_view = wl_container_of(listener, xdg_shell_view, new_popup);
-	struct wlr_xdg_popup *wlr_popup = data;
-	xdg_popup_create(&xdg_shell_view->view, wlr_popup);
+	wlr_xdg_popup_unconstrain_from_box(popup, &output_toplevel_box);
 }
 
 static struct cg_xdg_shell_view *
@@ -152,27 +121,26 @@ static char *
 get_title(struct cg_view *view)
 {
 	struct cg_xdg_shell_view *xdg_shell_view = xdg_shell_view_from_view(view);
-	return xdg_shell_view->xdg_surface->toplevel->title;
+	return xdg_shell_view->xdg_toplevel->title;
 }
 
 static void
 get_geometry(struct cg_view *view, int *width_out, int *height_out)
 {
 	struct cg_xdg_shell_view *xdg_shell_view = xdg_shell_view_from_view(view);
-	struct wlr_box geom;
+	struct wlr_xdg_surface *xdg_surface = xdg_shell_view->xdg_toplevel->base;
 
-	wlr_xdg_surface_get_geometry(xdg_shell_view->xdg_surface, &geom);
-	*width_out = geom.width;
-	*height_out = geom.height;
+	*width_out = xdg_surface->geometry.width;
+	*height_out = xdg_surface->geometry.height;
 }
 
 static bool
 is_primary(struct cg_view *view)
 {
 	struct cg_xdg_shell_view *xdg_shell_view = xdg_shell_view_from_view(view);
-	struct wlr_xdg_surface *parent = xdg_shell_view->xdg_surface->toplevel->parent;
-	/* FIXME: role is 0? */
-	return parent == NULL; /*&& role == WLR_XDG_SURFACE_ROLE_TOPLEVEL */
+	struct wlr_xdg_toplevel *parent = xdg_shell_view->xdg_toplevel->parent;
+
+	return parent == NULL;
 }
 
 static bool
@@ -182,14 +150,13 @@ is_transient_for(struct cg_view *child, struct cg_view *parent)
 		return false;
 	}
 	struct cg_xdg_shell_view *_child = xdg_shell_view_from_view(child);
-	struct wlr_xdg_surface *xdg_surface = _child->xdg_surface;
+	struct wlr_xdg_toplevel *xdg_toplevel = _child->xdg_toplevel;
 	struct cg_xdg_shell_view *_parent = xdg_shell_view_from_view(parent);
-	struct wlr_xdg_surface *parent_xdg_surface = _parent->xdg_surface;
-	while (xdg_surface) {
-		if (xdg_surface->toplevel->parent == parent_xdg_surface) {
+	while (xdg_toplevel) {
+		if (xdg_toplevel->parent == _parent->xdg_toplevel) {
 			return true;
 		}
-		xdg_surface = xdg_surface->toplevel->parent;
+		xdg_toplevel = xdg_toplevel->parent;
 	}
 	return false;
 }
@@ -198,15 +165,15 @@ static void
 activate(struct cg_view *view, bool activate)
 {
 	struct cg_xdg_shell_view *xdg_shell_view = xdg_shell_view_from_view(view);
-	wlr_xdg_toplevel_set_activated(xdg_shell_view->xdg_surface, activate);
+	wlr_xdg_toplevel_set_activated(xdg_shell_view->xdg_toplevel, activate);
 }
 
 static void
 maximize(struct cg_view *view, int output_width, int output_height)
 {
 	struct cg_xdg_shell_view *xdg_shell_view = xdg_shell_view_from_view(view);
-	wlr_xdg_toplevel_set_size(xdg_shell_view->xdg_surface, output_width, output_height);
-	wlr_xdg_toplevel_set_maximized(xdg_shell_view->xdg_surface, true);
+	wlr_xdg_toplevel_set_size(xdg_shell_view->xdg_toplevel, output_width, output_height);
+	wlr_xdg_toplevel_set_maximized(xdg_shell_view->xdg_toplevel, true);
 }
 
 static void
@@ -217,81 +184,68 @@ destroy(struct cg_view *view)
 }
 
 static void
-for_each_surface(struct cg_view *view, wlr_surface_iterator_func_t iterator, void *data)
-{
-	struct cg_xdg_shell_view *xdg_shell_view = xdg_shell_view_from_view(view);
-	wlr_xdg_surface_for_each_surface(xdg_shell_view->xdg_surface, iterator, data);
-}
-
-static void
-for_each_popup_surface(struct cg_view *view, wlr_surface_iterator_func_t iterator, void *data)
-{
-	struct cg_xdg_shell_view *xdg_shell_view = xdg_shell_view_from_view(view);
-	wlr_xdg_surface_for_each_popup_surface(xdg_shell_view->xdg_surface, iterator, data);
-}
-
-static struct wlr_surface *
-wlr_surface_at(struct cg_view *view, double sx, double sy, double *sub_x, double *sub_y)
-{
-	struct cg_xdg_shell_view *xdg_shell_view = xdg_shell_view_from_view(view);
-	return wlr_xdg_surface_surface_at(xdg_shell_view->xdg_surface, sx, sy, sub_x, sub_y);
-}
-
-static void
-handle_xdg_shell_surface_request_fullscreen(struct wl_listener *listener, void *data)
+handle_xdg_toplevel_request_fullscreen(struct wl_listener *listener, void *data)
 {
 	struct cg_xdg_shell_view *xdg_shell_view = wl_container_of(listener, xdg_shell_view, request_fullscreen);
-	struct wlr_xdg_toplevel_set_fullscreen_event *event = data;
-	wlr_xdg_toplevel_set_fullscreen(xdg_shell_view->xdg_surface, event->fullscreen);
+
+	/**
+	 * Certain clients do not like figuring out their own window geometry if they
+	 * display in fullscreen mode, so we set it here.
+	 */
+	struct wlr_box layout_box;
+	wlr_output_layout_get_box(xdg_shell_view->view.server->output_layout, NULL, &layout_box);
+	wlr_xdg_toplevel_set_size(xdg_shell_view->xdg_toplevel, layout_box.width, layout_box.height);
+
+	wlr_xdg_toplevel_set_fullscreen(xdg_shell_view->xdg_toplevel,
+					xdg_shell_view->xdg_toplevel->requested.fullscreen);
 }
 
 static void
-handle_xdg_shell_surface_commit(struct wl_listener *listener, void *data)
-{
-	struct cg_xdg_shell_view *xdg_shell_view = wl_container_of(listener, xdg_shell_view, commit);
-	struct cg_view *view = &xdg_shell_view->view;
-	view_damage_part(view);
-}
-
-static void
-handle_xdg_shell_surface_unmap(struct wl_listener *listener, void *data)
+handle_xdg_toplevel_unmap(struct wl_listener *listener, void *data)
 {
 	struct cg_xdg_shell_view *xdg_shell_view = wl_container_of(listener, xdg_shell_view, unmap);
 	struct cg_view *view = &xdg_shell_view->view;
 
-	view_damage_whole(view);
-
-	wl_list_remove(&xdg_shell_view->commit.link);
-
 	view_unmap(view);
 }
 
 static void
-handle_xdg_shell_surface_map(struct wl_listener *listener, void *data)
+handle_xdg_toplevel_map(struct wl_listener *listener, void *data)
 {
 	struct cg_xdg_shell_view *xdg_shell_view = wl_container_of(listener, xdg_shell_view, map);
 	struct cg_view *view = &xdg_shell_view->view;
 
-	xdg_shell_view->commit.notify = handle_xdg_shell_surface_commit;
-	wl_signal_add(&xdg_shell_view->xdg_surface->surface->events.commit, &xdg_shell_view->commit);
-
-	view_map(view, xdg_shell_view->xdg_surface->surface);
-
-	view_damage_whole(view);
+	view_map(view, xdg_shell_view->xdg_toplevel->base->surface);
 }
 
 static void
-handle_xdg_shell_surface_destroy(struct wl_listener *listener, void *data)
+handle_xdg_toplevel_commit(struct wl_listener *listener, void *data)
+{
+	struct cg_xdg_shell_view *xdg_shell_view = wl_container_of(listener, xdg_shell_view, commit);
+
+	if (!xdg_shell_view->xdg_toplevel->base->initial_commit) {
+		return;
+	}
+
+	wlr_xdg_toplevel_set_wm_capabilities(xdg_shell_view->xdg_toplevel, XDG_TOPLEVEL_WM_CAPABILITIES_FULLSCREEN);
+
+	/* When an xdg_surface performs an initial commit, the compositor must
+	 * reply with a configure so the client can map the surface. */
+	view_position(&xdg_shell_view->view);
+}
+
+static void
+handle_xdg_toplevel_destroy(struct wl_listener *listener, void *data)
 {
 	struct cg_xdg_shell_view *xdg_shell_view = wl_container_of(listener, xdg_shell_view, destroy);
 	struct cg_view *view = &xdg_shell_view->view;
 
+	wl_list_remove(&xdg_shell_view->commit.link);
 	wl_list_remove(&xdg_shell_view->map.link);
 	wl_list_remove(&xdg_shell_view->unmap.link);
 	wl_list_remove(&xdg_shell_view->destroy.link);
 	wl_list_remove(&xdg_shell_view->request_fullscreen.link);
-	wl_list_remove(&xdg_shell_view->new_popup.link);
-	xdg_shell_view->xdg_surface = NULL;
+	xdg_shell_view->xdg_toplevel = NULL;
 
 	view_destroy(view);
 }
@@ -304,20 +258,13 @@ static const struct cg_view_impl xdg_shell_view_impl = {
 	.activate = activate,
 	.maximize = maximize,
 	.destroy = destroy,
-	.for_each_surface = for_each_surface,
-	.for_each_popup_surface = for_each_popup_surface,
-	.wlr_surface_at = wlr_surface_at,
 };
 
 void
-handle_xdg_shell_surface_new(struct wl_listener *listener, void *data)
+handle_new_xdg_toplevel(struct wl_listener *listener, void *data)
 {
-	struct cg_server *server = wl_container_of(listener, server, new_xdg_shell_surface);
-	struct wlr_xdg_surface *xdg_surface = data;
-
-	if (xdg_surface->role != WLR_XDG_SURFACE_ROLE_TOPLEVEL) {
-		return;
-	}
+	struct cg_server *server = wl_container_of(listener, server, new_xdg_toplevel);
+	struct wlr_xdg_toplevel *toplevel = data;
 
 	struct cg_xdg_shell_view *xdg_shell_view = calloc(1, sizeof(struct cg_xdg_shell_view));
 	if (!xdg_shell_view) {
@@ -326,18 +273,105 @@ handle_xdg_shell_surface_new(struct wl_listener *listener, void *data)
 	}
 
 	view_init(&xdg_shell_view->view, server, CAGE_XDG_SHELL_VIEW, &xdg_shell_view_impl);
-	xdg_shell_view->xdg_surface = xdg_surface;
+	xdg_shell_view->xdg_toplevel = toplevel;
 
-	xdg_shell_view->map.notify = handle_xdg_shell_surface_map;
-	wl_signal_add(&xdg_surface->events.map, &xdg_shell_view->map);
-	xdg_shell_view->unmap.notify = handle_xdg_shell_surface_unmap;
-	wl_signal_add(&xdg_surface->events.unmap, &xdg_shell_view->unmap);
-	xdg_shell_view->destroy.notify = handle_xdg_shell_surface_destroy;
-	wl_signal_add(&xdg_surface->events.destroy, &xdg_shell_view->destroy);
-	xdg_shell_view->request_fullscreen.notify = handle_xdg_shell_surface_request_fullscreen;
-	wl_signal_add(&xdg_surface->toplevel->events.request_fullscreen, &xdg_shell_view->request_fullscreen);
-	xdg_shell_view->new_popup.notify = handle_new_xdg_popup;
-	wl_signal_add(&xdg_surface->events.new_popup, &xdg_shell_view->new_popup);
+	xdg_shell_view->commit.notify = handle_xdg_toplevel_commit;
+	wl_signal_add(&toplevel->base->surface->events.commit, &xdg_shell_view->commit);
+	xdg_shell_view->map.notify = handle_xdg_toplevel_map;
+	wl_signal_add(&toplevel->base->surface->events.map, &xdg_shell_view->map);
+	xdg_shell_view->unmap.notify = handle_xdg_toplevel_unmap;
+	wl_signal_add(&toplevel->base->surface->events.unmap, &xdg_shell_view->unmap);
+	xdg_shell_view->destroy.notify = handle_xdg_toplevel_destroy;
+	wl_signal_add(&toplevel->events.destroy, &xdg_shell_view->destroy);
+	xdg_shell_view->request_fullscreen.notify = handle_xdg_toplevel_request_fullscreen;
+	wl_signal_add(&toplevel->events.request_fullscreen, &xdg_shell_view->request_fullscreen);
+
+	toplevel->base->data = xdg_shell_view;
+}
+
+static void
+popup_handle_destroy(struct wl_listener *listener, void *data)
+{
+	struct cg_xdg_popup *popup = wl_container_of(listener, popup, destroy);
+	wl_list_remove(&popup->destroy.link);
+	wl_list_remove(&popup->commit.link);
+	wl_list_remove(&popup->reposition.link);
+	free(popup);
+}
+
+static void
+popup_handle_commit(struct wl_listener *listener, void *data)
+{
+	struct cg_xdg_popup *popup = wl_container_of(listener, popup, commit);
+
+	if (popup->xdg_popup->base->initial_commit) {
+		popup_unconstrain(popup->xdg_popup);
+	}
+}
+
+static void
+popup_handle_reposition(struct wl_listener *listener, void *data)
+{
+	struct cg_xdg_popup *popup = wl_container_of(listener, popup, reposition);
+
+	popup_unconstrain(popup->xdg_popup);
+}
+
+void
+handle_new_xdg_popup(struct wl_listener *listener, void *data)
+{
+	struct cg_server *server = wl_container_of(listener, server, new_xdg_popup);
+	struct wlr_xdg_popup *wlr_popup = data;
+
+	struct cg_view *view = popup_get_view(wlr_popup);
+	if (view == NULL) {
+		return;
+	}
+
+	struct wlr_scene_tree *parent_scene_tree = NULL;
+	struct wlr_xdg_surface *parent = wlr_xdg_surface_try_from_wlr_surface(wlr_popup->parent);
+	if (parent == NULL) {
+		return;
+	}
+	switch (parent->role) {
+	case WLR_XDG_SURFACE_ROLE_TOPLEVEL:;
+		parent_scene_tree = view->scene_tree;
+		break;
+	case WLR_XDG_SURFACE_ROLE_POPUP:
+		parent_scene_tree = parent->data;
+		break;
+	case WLR_XDG_SURFACE_ROLE_NONE:
+		break;
+	}
+	if (parent_scene_tree == NULL) {
+		return;
+	}
+
+	struct cg_xdg_popup *popup = calloc(1, sizeof(*popup));
+	if (popup == NULL) {
+		wlr_log(WLR_ERROR, "Failed to allocate popup");
+		return;
+	}
+
+	popup->xdg_popup = wlr_popup;
+
+	popup->destroy.notify = popup_handle_destroy;
+	wl_signal_add(&wlr_popup->events.destroy, &popup->destroy);
+
+	popup->commit.notify = popup_handle_commit;
+	wl_signal_add(&wlr_popup->base->surface->events.commit, &popup->commit);
+
+	popup->reposition.notify = popup_handle_reposition;
+	wl_signal_add(&wlr_popup->events.reposition, &popup->reposition);
+
+	struct wlr_scene_tree *popup_scene_tree = wlr_scene_xdg_surface_create(parent_scene_tree, wlr_popup->base);
+	if (popup_scene_tree == NULL) {
+		wlr_log(WLR_ERROR, "Failed to allocate scene-graph node for XDG popup");
+		free(popup);
+		return;
+	}
+
+	wlr_popup->base->data = popup_scene_tree;
 }
 
 void
@@ -356,8 +390,8 @@ handle_xdg_toplevel_decoration(struct wl_listener *listener, void *data)
 
 	xdg_decoration->destroy.notify = xdg_decoration_handle_destroy;
 	wl_signal_add(&wlr_decoration->events.destroy, &xdg_decoration->destroy);
+	xdg_decoration->commit.notify = xdg_decoration_handle_commit;
+	wl_signal_add(&wlr_decoration->toplevel->base->surface->events.commit, &xdg_decoration->commit);
 	xdg_decoration->request_mode.notify = xdg_decoration_handle_request_mode;
 	wl_signal_add(&wlr_decoration->events.request_mode, &xdg_decoration->request_mode);
-
-	xdg_decoration_handle_request_mode(&xdg_decoration->request_mode, wlr_decoration);
 }

xdg_shell.h

@@ -9,34 +9,33 @@
 
 struct cg_xdg_shell_view {
 	struct cg_view view;
-	struct wlr_xdg_surface *xdg_surface;
+	struct wlr_xdg_toplevel *xdg_toplevel;
 
 	struct wl_listener destroy;
-	struct wl_listener unmap;
-	struct wl_listener map;
 	struct wl_listener commit;
-	struct wl_listener request_fullscreen;
-	struct wl_listener new_popup;
-};
-
-struct cg_xdg_popup {
-	struct cg_view_child view_child;
-	struct wlr_xdg_popup *wlr_popup;
-
-	struct wl_listener destroy;
-	struct wl_listener map;
 	struct wl_listener unmap;
-	struct wl_listener new_popup;
+	struct wl_listener map;
+	struct wl_listener request_fullscreen;
 };
 
 struct cg_xdg_decoration {
 	struct wlr_xdg_toplevel_decoration_v1 *wlr_decoration;
 	struct cg_server *server;
 	struct wl_listener destroy;
+	struct wl_listener commit;
 	struct wl_listener request_mode;
 };
 
-void handle_xdg_shell_surface_new(struct wl_listener *listener, void *data);
+struct cg_xdg_popup {
+	struct wlr_xdg_popup *xdg_popup;
+
+	struct wl_listener destroy;
+	struct wl_listener commit;
+	struct wl_listener reposition;
+};
+
+void handle_new_xdg_toplevel(struct wl_listener *listener, void *data);
+void handle_new_xdg_popup(struct wl_listener *listener, void *data);
 
 void handle_xdg_toplevel_decoration(struct wl_listener *listener, void *data);
 

xwayland.c

@@ -9,7 +9,6 @@
 #include <stdbool.h>
 #include <stdlib.h>
 #include <wayland-server-core.h>
-#include <wlr/types/wlr_box.h>
 #include <wlr/util/log.h>
 #include <wlr/xwayland.h>
 
@@ -42,8 +41,15 @@ static void
 get_geometry(struct cg_view *view, int *width_out, int *height_out)
 {
 	struct cg_xwayland_view *xwayland_view = xwayland_view_from_view(view);
-	*width_out = xwayland_view->xwayland_surface->surface->current.width;
-	*height_out = xwayland_view->xwayland_surface->surface->current.height;
+	struct wlr_xwayland_surface *xsurface = xwayland_view->xwayland_surface;
+	if (xsurface->surface == NULL) {
+		*width_out = 0;
+		*height_out = 0;
+		return;
+	}
+
+	*width_out = xsurface->surface->current.width;
+	*height_out = xsurface->surface->current.height;
 }
 
 static bool
@@ -86,7 +92,7 @@ maximize(struct cg_view *view, int output_width, int output_height)
 	struct cg_xwayland_view *xwayland_view = xwayland_view_from_view(view);
 	wlr_xwayland_surface_configure(xwayland_view->xwayland_surface, view->lx, view->ly, output_width,
 				       output_height);
-	wlr_xwayland_surface_set_maximized(xwayland_view->xwayland_surface, true);
+	wlr_xwayland_surface_set_maximized(xwayland_view->xwayland_surface, true, true);
 }
 
 static void
@@ -96,18 +102,6 @@ destroy(struct cg_view *view)
 	free(xwayland_view);
 }
 
-static void
-for_each_surface(struct cg_view *view, wlr_surface_iterator_func_t iterator, void *data)
-{
-	wlr_surface_for_each_surface(view->wlr_surface, iterator, data);
-}
-
-static struct wlr_surface *
-wlr_surface_at(struct cg_view *view, double sx, double sy, double *sub_x, double *sub_y)
-{
-	return wlr_surface_surface_at(view->wlr_surface, sx, sy, sub_x, sub_y);
-}
-
 static void
 handle_xwayland_surface_request_fullscreen(struct wl_listener *listener, void *data)
 {
@@ -116,24 +110,12 @@ handle_xwayland_surface_request_fullscreen(struct wl_listener *listener, void *d
 	wlr_xwayland_surface_set_fullscreen(xwayland_view->xwayland_surface, xwayland_surface->fullscreen);
 }
 
-static void
-handle_xwayland_surface_commit(struct wl_listener *listener, void *data)
-{
-	struct cg_xwayland_view *xwayland_view = wl_container_of(listener, xwayland_view, commit);
-	struct cg_view *view = &xwayland_view->view;
-	view_damage_part(view);
-}
-
 static void
 handle_xwayland_surface_unmap(struct wl_listener *listener, void *data)
 {
 	struct cg_xwayland_view *xwayland_view = wl_container_of(listener, xwayland_view, unmap);
 	struct cg_view *view = &xwayland_view->view;
 
-	view_damage_whole(view);
-
-	wl_list_remove(&xwayland_view->commit.link);
-
 	view_unmap(view);
 }
 
@@ -148,12 +130,7 @@ handle_xwayland_surface_map(struct wl_listener *listener, void *data)
 		view->ly = xwayland_view->xwayland_surface->y;
 	}
 
-	xwayland_view->commit.notify = handle_xwayland_surface_commit;
-	wl_signal_add(&xwayland_view->xwayland_surface->surface->events.commit, &xwayland_view->commit);
-
 	view_map(view, xwayland_view->xwayland_surface->surface);
-
-	view_damage_whole(view);
 }
 
 static void
@@ -162,8 +139,6 @@ handle_xwayland_surface_destroy(struct wl_listener *listener, void *data)
 	struct cg_xwayland_view *xwayland_view = wl_container_of(listener, xwayland_view, destroy);
 	struct cg_view *view = &xwayland_view->view;
 
-	wl_list_remove(&xwayland_view->map.link);
-	wl_list_remove(&xwayland_view->unmap.link);
 	wl_list_remove(&xwayland_view->destroy.link);
 	wl_list_remove(&xwayland_view->request_fullscreen.link);
 	xwayland_view->xwayland_surface = NULL;
@@ -179,12 +154,28 @@ static const struct cg_view_impl xwayland_view_impl = {
 	.activate = activate,
 	.maximize = maximize,
 	.destroy = destroy,
-	.for_each_surface = for_each_surface,
-	/* XWayland doesn't have a separate popup iterator. */
-	.for_each_popup_surface = NULL,
-	.wlr_surface_at = wlr_surface_at,
 };
 
+void
+handle_xwayland_associate(struct wl_listener *listener, void *data)
+{
+	struct cg_xwayland_view *xwayland_view = wl_container_of(listener, xwayland_view, associate);
+	struct wlr_xwayland_surface *xsurface = xwayland_view->xwayland_surface;
+
+	xwayland_view->map.notify = handle_xwayland_surface_map;
+	wl_signal_add(&xsurface->surface->events.map, &xwayland_view->map);
+	xwayland_view->unmap.notify = handle_xwayland_surface_unmap;
+	wl_signal_add(&xsurface->surface->events.unmap, &xwayland_view->unmap);
+}
+
+void
+handle_xwayland_dissociate(struct wl_listener *listener, void *data)
+{
+	struct cg_xwayland_view *xwayland_view = wl_container_of(listener, xwayland_view, dissociate);
+	wl_list_remove(&xwayland_view->map.link);
+	wl_list_remove(&xwayland_view->unmap.link);
+}
+
 void
 handle_xwayland_surface_new(struct wl_listener *listener, void *data)
 {
@@ -200,10 +191,10 @@ handle_xwayland_surface_new(struct wl_listener *listener, void *data)
 	view_init(&xwayland_view->view, server, CAGE_XWAYLAND_VIEW, &xwayland_view_impl);
 	xwayland_view->xwayland_surface = xwayland_surface;
 
-	xwayland_view->map.notify = handle_xwayland_surface_map;
-	wl_signal_add(&xwayland_surface->events.map, &xwayland_view->map);
-	xwayland_view->unmap.notify = handle_xwayland_surface_unmap;
-	wl_signal_add(&xwayland_surface->events.unmap, &xwayland_view->unmap);
+	xwayland_view->associate.notify = handle_xwayland_associate;
+	wl_signal_add(&xwayland_surface->events.associate, &xwayland_view->associate);
+	xwayland_view->dissociate.notify = handle_xwayland_dissociate;
+	wl_signal_add(&xwayland_surface->events.dissociate, &xwayland_view->dissociate);
 	xwayland_view->destroy.notify = handle_xwayland_surface_destroy;
 	wl_signal_add(&xwayland_surface->events.destroy, &xwayland_view->destroy);
 	xwayland_view->request_fullscreen.notify = handle_xwayland_surface_request_fullscreen;

xwayland.h

@@ -10,9 +10,10 @@ struct cg_xwayland_view {
 	struct cg_view view;
 	struct wlr_xwayland_surface *xwayland_surface;
 	struct wl_listener destroy;
+	struct wl_listener associate;
+	struct wl_listener dissociate;
 	struct wl_listener unmap;
 	struct wl_listener map;
-	struct wl_listener commit;
 	struct wl_listener request_fullscreen;
 };