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foot/render.c
Daniel Eklöf 9a498038d6
resize: don’t reflow text on alt screen 
Alt screen applications normally reflow/readjust themselves on a
window resize.

When we do it too, the result is graphical glitches/flashes since our
re-flowed text is rendered in one frame, and the application re-flowed
text soon thereafter.

We can’t avoid rendering some kind of re-flowed frame, since we don’t
know when, or even if, the application will update itself. To avoid
glitches, we need to render, as closely as possible, what the
application itself will render shortly.

This is actually pretty simple; we just need to copy the visible
content over from the old grid to the new grid. We don’t bother with
text re-flow, but simply truncate long lines.

To simplify things, we simply cancel any active selection (since often
times, it will be corrupted anyway when the application redraws
itself).

Since we’re not reflowing text, there’s no need to translate e.g. the
cursor position - we just keep the current position (but bounded to
the new dimensions).

Fun thing: ‘less’ gets corrupted if we don’t leave the cursor at
the (new) bottom row. To handle this, we check if the cursor (before
resize) is at the bottom row, and if so, we move it to the new bottom
row.

Closes #221
2020-11-25 07:47:40 +01:00

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#include "render.h"
#include <string.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <sys/timerfd.h>
#include <sys/prctl.h>
#include <wayland-cursor.h>
#include <xdg-shell.h>
#include <presentation-time.h>
#include <fcft/fcft.h>
#define LOG_MODULE "render"
#define LOG_ENABLE_DBG 0
#include "log.h"
#include "config.h"
#include "grid.h"
#include "hsl.h"
#include "quirks.h"
#include "selection.h"
#include "sixel.h"
#include "shm.h"
#include "util.h"
#include "xmalloc.h"
#define TIME_SCROLL_DAMAGE 0
struct renderer {
struct fdm *fdm;
struct wayland *wayl;
};
static struct {
size_t total;
size_t zero; /* commits presented in less than one frame interval */
size_t one; /* commits presented in one frame interval */
size_t two; /* commits presented in two or more frame intervals */
} presentation_statistics = {0};
static void fdm_hook_refresh_pending_terminals(struct fdm *fdm, void *data);
struct renderer *
render_init(struct fdm *fdm, struct wayland *wayl)
{
struct renderer *renderer = malloc(sizeof(*renderer));
if (unlikely(renderer == NULL)) {
LOG_ERRNO("malloc() failed");
return NULL;
}
*renderer = (struct renderer) {
.fdm = fdm,
.wayl = wayl,
};
if (!fdm_hook_add(fdm, &fdm_hook_refresh_pending_terminals, renderer,
FDM_HOOK_PRIORITY_NORMAL))
{
LOG_ERR("failed to register FDM hook");
free(renderer);
return NULL;
}
return renderer;
}
void
render_destroy(struct renderer *renderer)
{
if (renderer == NULL)
return;
fdm_hook_del(renderer->fdm, &fdm_hook_refresh_pending_terminals,
FDM_HOOK_PRIORITY_NORMAL);
free(renderer);
}
static void __attribute__((destructor))
log_presentation_statistics(void)
{
if (presentation_statistics.total == 0)
return;
const size_t total = presentation_statistics.total;
LOG_INFO("presentation statistics: zero=%f%%, one=%f%%, two=%f%%",
100. * presentation_statistics.zero / total,
100. * presentation_statistics.one / total,
100. * presentation_statistics.two / total);
}
static void
sync_output(void *data,
struct wp_presentation_feedback *wp_presentation_feedback,
struct wl_output *output)
{
}
struct presentation_context {
struct terminal *term;
struct timeval input;
struct timeval commit;
};
static void
presented(void *data,
struct wp_presentation_feedback *wp_presentation_feedback,
uint32_t tv_sec_hi, uint32_t tv_sec_lo, uint32_t tv_nsec,
uint32_t refresh, uint32_t seq_hi, uint32_t seq_lo, uint32_t flags)
{
struct presentation_context *ctx = data;
struct terminal *term = ctx->term;
const struct timeval *input = &ctx->input;
const struct timeval *commit = &ctx->commit;
const struct timeval presented = {
.tv_sec = (uint64_t)tv_sec_hi << 32 | tv_sec_lo,
.tv_usec = tv_nsec / 1000,
};
bool use_input = (input->tv_sec > 0 || input->tv_usec > 0) &&
timercmp(&presented, input, >);
char msg[1024];
int chars = 0;
if (use_input && timercmp(&presented, input, <))
return;
else if (timercmp(&presented, commit, <))
return;
LOG_DBG("commit: %lu s %lu µs, presented: %lu s %lu µs",
commit->tv_sec, commit->tv_usec, presented.tv_sec, presented.tv_usec);
if (use_input) {
struct timeval diff;
timersub(commit, input, &diff);
chars += snprintf(
&msg[chars], sizeof(msg) - chars,
"input - %llu µs -> ", (unsigned long long)diff.tv_usec);
}
struct timeval diff;
timersub(&presented, commit, &diff);
chars += snprintf(
&msg[chars], sizeof(msg) - chars,
"commit - %llu µs -> ", (unsigned long long)diff.tv_usec);
if (use_input) {
assert(timercmp(&presented, input, >));
timersub(&presented, input, &diff);
} else {
assert(timercmp(&presented, commit, >));
timersub(&presented, commit, &diff);
}
chars += snprintf(
&msg[chars], sizeof(msg) - chars,
"presented (total: %llu µs)", (unsigned long long)diff.tv_usec);
unsigned frame_count = 0;
if (tll_length(term->window->on_outputs) > 0) {
const struct monitor *mon = tll_front(term->window->on_outputs);
frame_count = (diff.tv_sec * 1000000. + diff.tv_usec) / (1000000. / mon->refresh);
}
presentation_statistics.total++;
if (frame_count >= 2)
presentation_statistics.two++;
else if (frame_count >= 1)
presentation_statistics.one++;
else
presentation_statistics.zero++;
#define _log_fmt "%s (more than %u frames)"
if (frame_count >= 2)
LOG_ERR(_log_fmt, msg, frame_count);
else if (frame_count >= 1)
LOG_WARN(_log_fmt, msg, frame_count);
else
LOG_INFO(_log_fmt, msg, frame_count);
#undef _log_fmt
wp_presentation_feedback_destroy(wp_presentation_feedback);
free(ctx);
}
static void
discarded(void *data, struct wp_presentation_feedback *wp_presentation_feedback)
{
struct presentation_context *ctx = data;
wp_presentation_feedback_destroy(wp_presentation_feedback);
free(ctx);
}
static const struct wp_presentation_feedback_listener presentation_feedback_listener = {
.sync_output = &sync_output,
.presented = &presented,
.discarded = &discarded,
};
static struct fcft_font *
attrs_to_font(const struct terminal *term, const struct attributes *attrs)
{
int idx = attrs->italic << 1 | attrs->bold;
return term->fonts[idx];
}
static inline pixman_color_t
color_hex_to_pixman_with_alpha(uint32_t color, uint16_t alpha)
{
if (alpha == 0)
return (pixman_color_t){0, 0, 0, 0};
int alpha_div = 0xffff / alpha;
return (pixman_color_t){
.red = ((color >> 16 & 0xff) | (color >> 8 & 0xff00)) / alpha_div,
.green = ((color >> 8 & 0xff) | (color >> 0 & 0xff00)) / alpha_div,
.blue = ((color >> 0 & 0xff) | (color << 8 & 0xff00)) / alpha_div,
.alpha = alpha,
};
}
static inline pixman_color_t
color_hex_to_pixman(uint32_t color)
{
/* Count on the compiler optimizing this */
return color_hex_to_pixman_with_alpha(color, 0xffff);
}
static inline uint32_t
color_dim(uint32_t color)
{
int hue, sat, lum;
rgb_to_hsl(color, &hue, &sat, &lum);
return hsl_to_rgb(hue, sat, lum / 1.5);
}
static inline uint32_t
color_brighten(uint32_t color)
{
int hue, sat, lum;
rgb_to_hsl(color, &hue, &sat, &lum);
return hsl_to_rgb(hue, sat, min(100, lum * 1.3));
}
static inline void
color_dim_for_search(pixman_color_t *color)
{
color->red /= 2;
color->green /= 2;
color->blue /= 2;
}
static inline int
font_baseline(const struct terminal *term)
{
return term->fonts[0]->ascent;
}
static void
draw_unfocused_block(const struct terminal *term, pixman_image_t *pix,
const pixman_color_t *color, int x, int y, int cell_cols)
{
pixman_image_fill_rectangles(
PIXMAN_OP_SRC, pix, color, 4,
(pixman_rectangle16_t []){
{x, y, cell_cols * term->cell_width, 1}, /* top */
{x, y, 1, term->cell_height}, /* left */
{x + cell_cols * term->cell_width - 1, y, 1, term->cell_height}, /* right */
{x, y + term->cell_height - 1, cell_cols * term->cell_width, 1}, /* bottom */
});
}
static void
draw_bar(const struct terminal *term, pixman_image_t *pix,
const struct fcft_font *font,
const pixman_color_t *color, int x, int y)
{
int baseline = y + font_baseline(term) - term->fonts[0]->ascent;
pixman_image_fill_rectangles(
PIXMAN_OP_SRC, pix, color,
1, &(pixman_rectangle16_t){
x, baseline,
font->underline.thickness, term->fonts[0]->ascent + term->fonts[0]->descent});
}
static void
draw_underline(const struct terminal *term, pixman_image_t *pix,
const struct fcft_font *font,
const pixman_color_t *color, int x, int y, int cols)
{
pixman_image_fill_rectangles(
PIXMAN_OP_SRC, pix, color,
1, &(pixman_rectangle16_t){
x, y + font_baseline(term) - font->underline.position,
cols * term->cell_width, font->underline.thickness});
}
static void
draw_strikeout(const struct terminal *term, pixman_image_t *pix,
const struct fcft_font *font,
const pixman_color_t *color, int x, int y, int cols)
{
pixman_image_fill_rectangles(
PIXMAN_OP_SRC, pix, color,
1, &(pixman_rectangle16_t){
x, y + font_baseline(term) - font->strikeout.position,
cols * term->cell_width, font->strikeout.thickness});
}
static void
draw_cursor(const struct terminal *term, const struct cell *cell,
const struct fcft_font *font, pixman_image_t *pix, pixman_color_t *fg,
const pixman_color_t *bg, int x, int y, int cols)
{
pixman_color_t cursor_color;
pixman_color_t text_color;
bool is_selected = cell->attrs.selected;
if (term->cursor_color.cursor >> 31) {
cursor_color = color_hex_to_pixman(term->cursor_color.cursor);
text_color = color_hex_to_pixman(
term->cursor_color.text >> 31
? term->cursor_color.text : term->colors.bg);
if (term->reverse ^ cell->attrs.reverse ^ is_selected) {
pixman_color_t swap = cursor_color;
cursor_color = text_color;
text_color = swap;
}
if (term->is_searching && !is_selected) {
color_dim_for_search(&cursor_color);
color_dim_for_search(&text_color);
}
} else {
cursor_color = *fg;
text_color = *bg;
}
switch (term->cursor_style) {
case CURSOR_BLOCK:
if (!term->kbd_focus)
draw_unfocused_block(term, pix, &cursor_color, x, y, cols);
else if (term->cursor_blink.state == CURSOR_BLINK_ON) {
*fg = text_color;
pixman_image_fill_rectangles(
PIXMAN_OP_SRC, pix, &cursor_color, 1,
&(pixman_rectangle16_t){x, y, cols * term->cell_width, term->cell_height});
}
break;
case CURSOR_BAR:
if (term->cursor_blink.state == CURSOR_BLINK_ON || !term->kbd_focus)
draw_bar(term, pix, font, &cursor_color, x, y);
break;
case CURSOR_UNDERLINE:
if (term->cursor_blink.state == CURSOR_BLINK_ON || !term->kbd_focus) {
draw_underline(
term, pix, attrs_to_font(term, &cell->attrs), &cursor_color,
x, y, cols);
}
break;
}
}
static int
render_cell(struct terminal *term, pixman_image_t *pix,
struct row *row, int col, int row_no, bool has_cursor)
{
struct cell *cell = &row->cells[col];
if (cell->attrs.clean)
return 0;
cell->attrs.clean = 1;
int width = term->cell_width;
int height = term->cell_height;
int x = term->margins.left + col * width;
int y = term->margins.top + row_no * height;
assert(cell->attrs.selected == 0 || cell->attrs.selected == 1);
bool is_selected = cell->attrs.selected;
uint32_t _fg = 0;
uint32_t _bg = 0;
if (is_selected && term->conf->colors.selection_uses_custom_colors) {
_fg = term->conf->colors.selection_fg;
_bg = term->conf->colors.selection_bg;
} else {
/* Use cell specific color, if set, otherwise the default colors (possible reversed) */
_fg = cell->attrs.have_fg ? cell->attrs.fg : term->colors.fg;
_bg = cell->attrs.have_bg ? cell->attrs.bg : term->colors.bg;
if (term->reverse ^ cell->attrs.reverse ^ is_selected) {
uint32_t swap = _fg;
_fg = _bg;
_bg = swap;
}
}
if (cell->attrs.dim)
_fg = color_dim(_fg);
if (term->conf->bold_in_bright && cell->attrs.bold)
_fg = color_brighten(_fg);
if (cell->attrs.blink && term->blink.state == BLINK_OFF)
_fg = color_dim(_fg);
pixman_color_t fg = color_hex_to_pixman(_fg);
pixman_color_t bg = color_hex_to_pixman_with_alpha(
_bg,
(_bg == (term->reverse ? term->colors.fg : term->colors.bg)
? term->colors.alpha : 0xffff));
if (term->is_searching && !is_selected) {
color_dim_for_search(&fg);
color_dim_for_search(&bg);
}
struct fcft_font *font = attrs_to_font(term, &cell->attrs);
const struct fcft_glyph *glyph = NULL;
const struct composed *composed = NULL;
if (cell->wc != 0) {
wchar_t base = cell->wc;
if (base >= CELL_COMB_CHARS_LO &&
base < (CELL_COMB_CHARS_LO + term->composed_count))
{
composed = &term->composed[base - CELL_COMB_CHARS_LO];
base = composed->base;
}
glyph = fcft_glyph_rasterize(font, base, term->font_subpixel);
}
const int cols_left = term->cols - col;
int cell_cols = glyph != NULL ? max(1, min(glyph->cols, cols_left)) : 1;
/*
* Hack!
*
* Deal with double-width glyphs for which wcwidth() returns
* 1. Typically Unicode private usage area characters,
* e.g. powerline, or nerd hack fonts.
*
* Users can enable a tweak option that lets this glyphs
* overflow/bleed into the neighbouring cell.
*
* We only apply this workaround if:
* - the user has explicitly enabled this feature
* - the *character* width is 1
* - the *glyph* width is at least 1.5 cells
* - the *glyph* width is less than 3 cells
* - *this* column isn’t the last column
* - *this* cells is followed by an empty cell, or a space
*/
if (term->conf->tweak.allow_overflowing_double_width_glyphs &&
glyph != NULL &&
glyph->cols == 1 &&
glyph->width >= term->cell_width * 15 / 10 &&
glyph->width < 3 * term->cell_width &&
col < term->cols - 1 &&
(row->cells[col + 1].wc == 0 || row->cells[col + 1].wc == L' '))
{
cell_cols = min(2, cols_left);
}
pixman_region32_t clip;
pixman_region32_init_rect(
&clip, x, y,
cell_cols * term->cell_width, term->cell_height);
pixman_image_set_clip_region32(pix, &clip);
/* Background */
pixman_image_fill_rectangles(
PIXMAN_OP_SRC, pix, &bg, 1,
&(pixman_rectangle16_t){x, y, cell_cols * width, height});
if (cell->attrs.blink && term->blink.fd < 0) {
/* TODO: use a custom lock for this? */
mtx_lock(&term->render.workers.lock);
term_arm_blink_timer(term);
mtx_unlock(&term->render.workers.lock);
}
if (has_cursor && term->cursor_style == CURSOR_BLOCK && term->kbd_focus)
draw_cursor(term, cell, font, pix, &fg, &bg, x, y, cell_cols);
if (cell->wc == 0 || cell->wc == CELL_MULT_COL_SPACER || cell->attrs.conceal)
goto draw_cursor;
pixman_image_t *clr_pix = pixman_image_create_solid_fill(&fg);
if (glyph != NULL) {
if (unlikely(pixman_image_get_format(glyph->pix) == PIXMAN_a8r8g8b8)) {
/* Glyph surface is a pre-rendered image (typically a color emoji...) */
if (!(cell->attrs.blink && term->blink.state == BLINK_OFF)) {
pixman_image_composite32(
PIXMAN_OP_OVER, glyph->pix, NULL, pix, 0, 0, 0, 0,
x + glyph->x, y + font_baseline(term) - glyph->y,
glyph->width, glyph->height);
}
} else {
pixman_image_composite32(
PIXMAN_OP_OVER, clr_pix, glyph->pix, pix, 0, 0, 0, 0,
x + glyph->x, y + font_baseline(term) - glyph->y,
glyph->width, glyph->height);
/* Combining characters */
if (composed != NULL) {
for (size_t i = 0; i < composed->count; i++) {
const struct fcft_glyph *g = fcft_glyph_rasterize(
font, composed->combining[i], term->font_subpixel);
if (g == NULL)
continue;
pixman_image_composite32(
PIXMAN_OP_OVER, clr_pix, g->pix, pix, 0, 0, 0, 0,
/* Some fonts use a negative offset, while others use a
* "normal" offset */
x + (g->x < 0 ? term->cell_width : 0) + g->x,
y + font_baseline(term) - g->y,
g->width, g->height);
}
}
}
}
pixman_image_unref(clr_pix);
/* Underline */
if (cell->attrs.underline)
draw_underline(term, pix, font, &fg, x, y, cell_cols);
if (cell->attrs.strikethrough)
draw_strikeout(term, pix, font, &fg, x, y, cell_cols);
draw_cursor:
if (has_cursor && (term->cursor_style != CURSOR_BLOCK || !term->kbd_focus))
draw_cursor(term, cell, font, pix, &fg, &bg, x, y, cell_cols);
pixman_image_set_clip_region32(pix, NULL);
return cell_cols;
}
static void
render_urgency(struct terminal *term, struct buffer *buf)
{
uint32_t red = term->colors.table[1];
if (term->is_searching)
red = color_dim(red);
pixman_color_t bg = color_hex_to_pixman(red);
int width = min(min(term->margins.left, term->margins.right),
min(term->margins.top, term->margins.bottom));
pixman_image_fill_rectangles(
PIXMAN_OP_SRC, buf->pix[0], &bg, 4,
(pixman_rectangle16_t[]){
/* Top */
{0, 0, term->width, width},
/* Bottom */
{0, term->height - width, term->width, width},
/* Left */
{0, width, width, term->height - 2 * width},
/* Right */
{term->width - width, width, width, term->height - 2 * width},
});
}
static void
render_margin(struct terminal *term, struct buffer *buf,
int start_line, int end_line, bool apply_damage)
{
/* Fill area outside the cell grid with the default background color */
const int rmargin = term->width - term->margins.right;
const int bmargin = term->height - term->margins.bottom;
const int line_count = end_line - start_line;
uint32_t _bg = !term->reverse ? term->colors.bg : term->colors.fg;
if (term->is_searching)
_bg = color_dim(_bg);
pixman_color_t bg = color_hex_to_pixman_with_alpha(
_bg,
(_bg == (term->reverse ? term->colors.fg : term->colors.bg)
? term->colors.alpha : 0xffff));
pixman_image_fill_rectangles(
PIXMAN_OP_SRC, buf->pix[0], &bg, 4,
(pixman_rectangle16_t[]){
/* Top */
{0, 0, term->width, term->margins.top},
/* Bottom */
{0, bmargin, term->width, term->margins.bottom},
/* Left */
{0, term->margins.top + start_line * term->cell_height,
term->margins.left, line_count * term->cell_height},
/* Right */
{rmargin, term->margins.top + start_line * term->cell_height,
term->margins.right, line_count * term->cell_height},
});
if (term->render.urgency)
render_urgency(term, buf);
if (apply_damage) {
/* Top */
wl_surface_damage_buffer(
term->window->surface, 0, 0, term->width, term->margins.top);
/* Bottom */
wl_surface_damage_buffer(
term->window->surface, 0, bmargin, term->width, term->margins.bottom);
/* Left */
wl_surface_damage_buffer(
term->window->surface,
0, term->margins.top + start_line * term->cell_height,
term->margins.left, line_count * term->cell_height);
/* Right */
wl_surface_damage_buffer(
term->window->surface,
rmargin, term->margins.top + start_line * term->cell_height,
term->margins.right, line_count * term->cell_height);
}
}
static void
grid_render_scroll(struct terminal *term, struct buffer *buf,
const struct damage *dmg)
{
int height = (dmg->region.end - dmg->region.start - dmg->lines) * term->cell_height;
LOG_DBG(
"damage: SCROLL: %d-%d by %d lines",
dmg->region.start, dmg->region.end, dmg->lines);
if (height <= 0)
return;
#if TIME_SCROLL_DAMAGE
struct timeval start_time;
gettimeofday(&start_time, NULL);
#endif
int dst_y = term->margins.top + (dmg->region.start + 0) * term->cell_height;
int src_y = term->margins.top + (dmg->region.start + dmg->lines) * term->cell_height;
/*
* SHM scrolling can be *much* faster, but it depends on how many
* lines we're scrolling, and how much repairing we need to do.
*
* In short, scrolling a *large* number of rows is faster with a
* memmove, while scrolling a *small* number of lines is faster
* with SHM scrolling.
*
* However, since we need to restore the scrolling regions when
* SHM scrolling, we also need to take this into account.
*
* Finally, we also have to restore the window margins, and this
* is a *huge* performance hit when scrolling a large number of
* lines (in addition to the sloweness of SHM scrolling as
* method).
*
* So, we need to figure out when to SHM scroll, and when to
* memmove.
*
* For now, assume that the both methods perform roughly the same,
* given an equal number of bytes to move/allocate, and use the
* method that results in the least amount of bytes to touch.
*
* Since number of lines directly translates to bytes, we can
* simply count lines.
*
* SHM scrolling needs to first "move" (punch hole + allocate)
* dmg->lines number of lines, and then we need to restore
* the bottom scroll region.
*
* If the total number of lines is less than half the screen - use
* SHM. Otherwise use memmove.
*/
bool try_shm_scroll =
shm_can_scroll(buf) && (
dmg->lines +
dmg->region.start +
(term->rows - dmg->region.end)) < term->rows / 2;
bool did_shm_scroll = false;
//try_shm_scroll = false;
//try_shm_scroll = true;
if (try_shm_scroll) {
did_shm_scroll = shm_scroll(
term->wl->shm, buf, dmg->lines * term->cell_height,
term->margins.top, dmg->region.start * term->cell_height,
term->margins.bottom, (term->rows - dmg->region.end) * term->cell_height);
}
if (did_shm_scroll) {
/* Restore margins */
render_margin(
term, buf, dmg->region.end - dmg->lines, term->rows, false);
} else {
/* Fallback for when we either cannot do SHM scrolling, or it failed */
uint8_t *raw = buf->mmapped;
memmove(raw + dst_y * buf->stride,
raw + src_y * buf->stride,
height * buf->stride);
}
#if TIME_SCROLL_DAMAGE
struct timeval end_time;
gettimeofday(&end_time, NULL);
struct timeval memmove_time;
timersub(&end_time, &start_time, &memmove_time);
LOG_INFO("scrolled %dKB (%d lines) using %s in %lds %ldus",
height * buf->stride / 1024, dmg->lines,
did_shm_scroll ? "SHM" : try_shm_scroll ? "memmove (SHM failed)" : "memmove",
memmove_time.tv_sec, memmove_time.tv_usec);
#endif
wl_surface_damage_buffer(
term->window->surface, term->margins.left, dst_y,
term->width - term->margins.left - term->margins.right, height);
}
static void
grid_render_scroll_reverse(struct terminal *term, struct buffer *buf,
const struct damage *dmg)
{
int height = (dmg->region.end - dmg->region.start - dmg->lines) * term->cell_height;
LOG_DBG(
"damage: SCROLL REVERSE: %d-%d by %d lines",
dmg->region.start, dmg->region.end, dmg->lines);
if (height <= 0)
return;
#if TIME_SCROLL_DAMAGE
struct timeval start_time;
gettimeofday(&start_time, NULL);
#endif
int src_y = term->margins.top + (dmg->region.start + 0) * term->cell_height;
int dst_y = term->margins.top + (dmg->region.start + dmg->lines) * term->cell_height;
bool try_shm_scroll =
shm_can_scroll(buf) && (
dmg->lines +
dmg->region.start +
(term->rows - dmg->region.end)) < term->rows / 2;
bool did_shm_scroll = false;
if (try_shm_scroll) {
did_shm_scroll = shm_scroll(
term->wl->shm, buf, -dmg->lines * term->cell_height,
term->margins.top, dmg->region.start * term->cell_height,
term->margins.bottom, (term->rows - dmg->region.end) * term->cell_height);
}
if (did_shm_scroll) {
/* Restore margins */
render_margin(
term, buf, dmg->region.start, dmg->region.start + dmg->lines, false);
} else {
/* Fallback for when we either cannot do SHM scrolling, or it failed */
uint8_t *raw = buf->mmapped;
memmove(raw + dst_y * buf->stride,
raw + src_y * buf->stride,
height * buf->stride);
}
#if TIME_SCROLL_DAMAGE
struct timeval end_time;
gettimeofday(&end_time, NULL);
struct timeval memmove_time;
timersub(&end_time, &start_time, &memmove_time);
LOG_INFO("scrolled REVERSE %dKB (%d lines) using %s in %lds %ldus",
height * buf->stride / 1024, dmg->lines,
did_shm_scroll ? "SHM" : try_shm_scroll ? "memmove (SHM failed)" : "memmove",
memmove_time.tv_sec, memmove_time.tv_usec);
#endif
wl_surface_damage_buffer(
term->window->surface, term->margins.left, dst_y,
term->width - term->margins.left - term->margins.right, height);
}
static void
render_sixel_chunk(struct terminal *term, pixman_image_t *pix, const struct sixel *sixel,
int term_start_row, int img_start_row, int count)
{
/* Translate row/column to x/y pixel values */
const int x = term->margins.left + sixel->pos.col * term->cell_width;
const int y = term->margins.top + term_start_row * term->cell_height;
/* Width/height, in pixels - and don't touch the window margins */
const int width = max(
0,
min(sixel->width,
term->width - x - term->margins.right));
const int height = max(
0,
min(
min(count * term->cell_height, /* 'count' number of rows */
sixel->height - img_start_row * term->cell_height), /* What remains of the sixel */
term->height - y - term->margins.bottom));
/* Verify we're not stepping outside the grid */
assert(x >= term->margins.left);
assert(y >= term->margins.top);
assert(x + width <= term->width - term->margins.right);
assert(y + height <= term->height - term->margins.bottom);
//LOG_DBG("sixel chunk: %dx%d %dx%d", x, y, width, height);
pixman_image_composite32(
PIXMAN_OP_SRC,
sixel->pix,
NULL,
pix,
0, img_start_row * term->cell_height,
0, 0,
x, y,
width, height);
wl_surface_damage_buffer(term->window->surface, x, y, width, height);
}
static void
render_sixel(struct terminal *term, pixman_image_t *pix,
const struct sixel *sixel)
{
const int view_end = (term->grid->view + term->rows - 1) & (term->grid->num_rows - 1);
const bool last_row_needs_erase = sixel->height % term->cell_height != 0;
const bool last_col_needs_erase = sixel->width % term->cell_width != 0;
int chunk_img_start = -1; /* Image-relative start row of chunk */
int chunk_term_start = -1; /* Viewport relative start row of chunk */
int chunk_row_count = 0; /* Number of rows to emit */
#define maybe_emit_sixel_chunk_then_reset() \
if (chunk_row_count != 0) { \
render_sixel_chunk( \
term, pix, sixel, \
chunk_term_start, chunk_img_start, chunk_row_count); \
chunk_term_start = chunk_img_start = -1; \
chunk_row_count = 0; \
}
/*
* Iterate all sixel rows:
*
* - ignore rows that aren't visible on-screen
* - ignore rows that aren't dirty (they have already been rendered)
* - chunk consecutive dirty rows into a 'chunk'
* - emit (render) chunk as soon as a row isn't visible, or is clean
* - emit final chunk after we've iterated all rows
*
* The purpose of this is to reduce the amount of pixels that
* needs to be composited and marked as damaged for the
* compositor.
*
* Since we do CPU based composition, rendering is a slow and
* heavy task for foot, and thus it is important to not re-render
* things unnecessarily.
*/
for (int _abs_row_no = sixel->pos.row;
_abs_row_no < sixel->pos.row + sixel->rows;
_abs_row_no++)
{
const int abs_row_no = _abs_row_no & (term->grid->num_rows - 1);
const int term_row_no =
(abs_row_no - term->grid->view + term->grid->num_rows) &
(term->grid->num_rows - 1);
/* Check if row is in the visible viewport */
if (view_end >= term->grid->view) {
/* Not wrapped */
if (!(abs_row_no >= term->grid->view && abs_row_no <= view_end)) {
/* Not visible */
maybe_emit_sixel_chunk_then_reset();
continue;
}
} else {
/* Wrapped */
if (!(abs_row_no >= term->grid->view || abs_row_no <= view_end)) {
/* Not visible */
maybe_emit_sixel_chunk_then_reset();
continue;
}
}
/* Is the row dirty? */
struct row *row = term->grid->rows[abs_row_no];
assert(row != NULL); /* Should be visible */
if (!row->dirty) {
maybe_emit_sixel_chunk_then_reset();
continue;
}
/*
* Loop cells and set their 'clean' bit, to prevent the grid
* rendered from overwriting the sixel
*
* If the last sixel row only partially covers the cell row,
* 'erase' the cell by rendering them.
*/
for (int col = sixel->pos.col;
col < min(sixel->pos.col + sixel->cols, term->cols);
col++)
{
struct cell *cell = &row->cells[col];
if (!cell->attrs.clean) {
bool last_row = abs_row_no == sixel->pos.row + sixel->rows - 1;
bool last_col = col == sixel->pos.col + sixel->cols - 1;
if ((last_row_needs_erase && last_row) ||
(last_col_needs_erase && last_col))
{
render_cell(term, pix, row, col, term_row_no, false);
} else
cell->attrs.clean = 1;
}
}
if (chunk_term_start == -1) {
assert(chunk_img_start == -1);
chunk_term_start = term_row_no;
chunk_img_start = _abs_row_no - sixel->pos.row;
chunk_row_count = 1;
} else
chunk_row_count++;
}
maybe_emit_sixel_chunk_then_reset();
#undef maybe_emit_sixel_chunk_then_reset
}
static void
render_sixel_images(struct terminal *term, pixman_image_t *pix)
{
if (likely(tll_length(term->grid->sixel_images)) == 0)
return;
const int scrollback_end
= (term->grid->offset + term->rows) & (term->grid->num_rows - 1);
const int view_start
= (term->grid->view
- scrollback_end
+ term->grid->num_rows) & (term->grid->num_rows - 1);
const int view_end = view_start + term->rows - 1;
//LOG_DBG("SIXELS: %zu images, view=%d-%d",
// tll_length(term->grid->sixel_images), view_start, view_end);
tll_foreach(term->grid->sixel_images, it) {
const struct sixel *six = &it->item;
const int start
= (six->pos.row
- scrollback_end
+ term->grid->num_rows) & (term->grid->num_rows - 1);
const int end = start + six->rows - 1;
//LOG_DBG(" sixel: %d-%d", start, end);
if (start > view_end) {
/* Sixel starts after view ends, no need to try to render it */
continue;
} else if (end < view_start) {
/* Image ends before view starts. Since the image list is
* sorted, we can safely stop here */
break;
}
render_sixel(term, pix, &it->item);
}
}
static void
render_row(struct terminal *term, pixman_image_t *pix, struct row *row,
int row_no, int cursor_col)
{
for (int col = term->cols - 1; col >= 0; col--)
render_cell(term, pix, row, col, row_no, cursor_col == col);
}
int
render_worker_thread(void *_ctx)
{
struct render_worker_context *ctx = _ctx;
struct terminal *term = ctx->term;
const int my_id = ctx->my_id;
free(ctx);
char proc_title[16];
snprintf(proc_title, sizeof(proc_title), "foot:render:%d", my_id);
if (prctl(PR_SET_NAME, proc_title, 0, 0, 0) < 0)
LOG_ERRNO("render worker %d: failed to set process title", my_id);
sem_t *start = &term->render.workers.start;
sem_t *done = &term->render.workers.done;
mtx_t *lock = &term->render.workers.lock;
while (true) {
sem_wait(start);
struct buffer *buf = term->render.workers.buf;
bool frame_done = false;
/* Translate offset-relative cursor row to view-relative */
struct coord cursor = {-1, -1};
if (!term->hide_cursor) {
cursor = term->grid->cursor.point;
cursor.row += term->grid->offset;
cursor.row -= term->grid->view;
cursor.row &= term->grid->num_rows - 1;
}
while (!frame_done) {
mtx_lock(lock);
assert(tll_length(term->render.workers.queue) > 0);
int row_no = tll_pop_front(term->render.workers.queue);
mtx_unlock(lock);
switch (row_no) {
default: {
assert(buf != NULL);
struct row *row = grid_row_in_view(term->grid, row_no);
int cursor_col = cursor.row == row_no ? cursor.col : -1;
render_row(term, buf->pix[my_id], row, row_no, cursor_col);
break;
}
case -1:
frame_done = true;
sem_post(done);
break;
case -2:
return 0;
}
}
};
return -1;
}
struct csd_data {
int x;
int y;
int width;
int height;
};
static struct csd_data
get_csd_data(const struct terminal *term, enum csd_surface surf_idx)
{
assert(term->window->use_csd == CSD_YES);
/* Only title bar is rendered in maximized mode */
const int border_width = !term->window->is_maximized
? term->conf->csd.border_width * term->scale : 0;
const int title_height = term->window->is_fullscreen
? 0
: term->conf->csd.title_height * term->scale;
const int button_width = !term->window->is_fullscreen
? term->conf->csd.button_width * term->scale : 0;
const int button_close_width = term->width >= 1 * button_width
? button_width : 0;
const int button_maximize_width = term->width >= 2 * button_width
? button_width : 0;
const int button_minimize_width = term->width >= 3 * button_width
? button_width : 0;
switch (surf_idx) {
case CSD_SURF_TITLE: return (struct csd_data){ 0, -title_height, term->width, title_height};
case CSD_SURF_LEFT: return (struct csd_data){-border_width, -title_height, border_width, title_height + term->height};
case CSD_SURF_RIGHT: return (struct csd_data){ term->width, -title_height, border_width, title_height + term->height};
case CSD_SURF_TOP: return (struct csd_data){-border_width, -title_height - border_width, term->width + 2 * border_width, border_width};
case CSD_SURF_BOTTOM: return (struct csd_data){-border_width, term->height, term->width + 2 * border_width, border_width};
/* Positioned relative to CSD_SURF_TITLE */
case CSD_SURF_MINIMIZE: return (struct csd_data){term->width - 3 * button_width, 0, button_minimize_width, title_height};
case CSD_SURF_MAXIMIZE: return (struct csd_data){term->width - 2 * button_width, 0, button_maximize_width, title_height};
case CSD_SURF_CLOSE: return (struct csd_data){term->width - 1 * button_width, 0, button_close_width, title_height};
case CSD_SURF_COUNT:
assert(false);
return (struct csd_data){0};
}
assert(false);
return (struct csd_data){0};
}
static void
csd_commit(struct terminal *term, struct wl_surface *surf, struct buffer *buf)
{
wl_surface_attach(surf, buf->wl_buf, 0, 0);
wl_surface_damage_buffer(surf, 0, 0, buf->width, buf->height);
wl_surface_set_buffer_scale(surf, term->scale);
wl_surface_commit(surf);
}
static void
render_csd_part(struct terminal *term,
struct wl_surface *surf, struct buffer *buf,
int width, int height, pixman_color_t *color)
{
assert(term->window->use_csd == CSD_YES);
pixman_image_t *src = pixman_image_create_solid_fill(color);
pixman_image_fill_rectangles(
PIXMAN_OP_SRC, buf->pix[0], color, 1,
&(pixman_rectangle16_t){0, 0, buf->width, buf->height});
pixman_image_unref(src);
}
static void
render_csd_title(struct terminal *term)
{
assert(term->window->use_csd == CSD_YES);
struct csd_data info = get_csd_data(term, CSD_SURF_TITLE);
struct wl_surface *surf = term->window->csd.surface[CSD_SURF_TITLE];
assert(info.width > 0 && info.height > 0);
unsigned long cookie = shm_cookie_csd(term, CSD_SURF_TITLE);
struct buffer *buf = shm_get_buffer(
term->wl->shm, info.width, info.height, cookie, false, 1);
uint32_t _color = term->colors.default_fg;
uint16_t alpha = 0xffff;
if (term->conf->csd.color.title_set) {
_color = term->conf->csd.color.title;
alpha = _color >> 24 | (_color >> 24 << 8);
}
if (!term->visual_focus)
_color = color_dim(_color);
pixman_color_t color = color_hex_to_pixman_with_alpha(_color, alpha);
render_csd_part(term, surf, buf, info.width, info.height, &color);
csd_commit(term, surf, buf);
}
static void
render_csd_border(struct terminal *term, enum csd_surface surf_idx)
{
assert(term->window->use_csd == CSD_YES);
assert(surf_idx >= CSD_SURF_LEFT && surf_idx <= CSD_SURF_BOTTOM);
struct csd_data info = get_csd_data(term, surf_idx);
struct wl_surface *surf = term->window->csd.surface[surf_idx];
if (info.width == 0 || info.height == 0)
return;
unsigned long cookie = shm_cookie_csd(term, surf_idx);
struct buffer *buf = shm_get_buffer(
term->wl->shm, info.width, info.height, cookie, false, 1);
pixman_color_t color = color_hex_to_pixman_with_alpha(0, 0);
render_csd_part(term, surf, buf, info.width, info.height, &color);
csd_commit(term, surf, buf);
}
static void
render_csd_button_minimize(struct terminal *term, struct buffer *buf)
{
pixman_color_t color = color_hex_to_pixman(term->colors.default_bg);
pixman_image_t *src = pixman_image_create_solid_fill(&color);
const int max_height = buf->height / 2;
const int max_width = buf->width / 2;
int width = max_width;
int height = max_width / 2;
if (height > max_height) {
height = max_height;
width = height * 2;
}
assert(width <= max_width);
assert(height <= max_height);
int x_margin = (buf->width - width) / 2.;
int y_margin = (buf->height - height) / 2.;
pixman_triangle_t tri = {
.p1 = {
.x = pixman_int_to_fixed(x_margin),
.y = pixman_int_to_fixed(y_margin),
},
.p2 = {
.x = pixman_int_to_fixed(x_margin + width),
.y = pixman_int_to_fixed(y_margin),
},
.p3 = {
.x = pixman_int_to_fixed(buf->width / 2),
.y = pixman_int_to_fixed(y_margin + height),
},
};
pixman_composite_triangles(
PIXMAN_OP_OVER, src, buf->pix[0], PIXMAN_a1,
0, 0, 0, 0, 1, &tri);
pixman_image_unref(src);
}
static void
render_csd_button_maximize_maximized(
struct terminal *term, struct buffer *buf)
{
pixman_color_t color = color_hex_to_pixman(term->colors.default_bg);
pixman_image_t *src = pixman_image_create_solid_fill(&color);
const int max_height = buf->height / 3;
const int max_width = buf->width / 3;
int width = min(max_height, max_width);
int thick = 1 * term->scale;
const int x_margin = (buf->width - width) / 2;
const int y_margin = (buf->height - width) / 2;
pixman_image_fill_rectangles(
PIXMAN_OP_SRC, buf->pix[0], &color, 4,
(pixman_rectangle16_t[]){
{x_margin, y_margin, width, thick},
{x_margin, y_margin + thick, thick, width - 2 * thick},
{x_margin + width - thick, y_margin + thick, thick, width - 2 * thick},
{x_margin, y_margin + width - thick, width, thick}});
pixman_image_unref(src);
}
static void
render_csd_button_maximize_window(
struct terminal *term, struct buffer *buf)
{
pixman_color_t color = color_hex_to_pixman(term->colors.default_bg);
pixman_image_t *src = pixman_image_create_solid_fill(&color);
const int max_height = buf->height / 2;
const int max_width = buf->width / 2;
int width = max_width;
int height = max_width / 2;
if (height > max_height) {
height = max_height;
width = height * 2;
}
assert(width <= max_width);
assert(height <= max_height);
int x_margin = (buf->width - width) / 2.;
int y_margin = (buf->height - height) / 2.;
pixman_triangle_t tri = {
.p1 = {
.x = pixman_int_to_fixed(buf->width / 2),
.y = pixman_int_to_fixed(y_margin),
},
.p2 = {
.x = pixman_int_to_fixed(x_margin),
.y = pixman_int_to_fixed(y_margin + height),
},
.p3 = {
.x = pixman_int_to_fixed(x_margin + width),
.y = pixman_int_to_fixed(y_margin + height),
},
};
pixman_composite_triangles(
PIXMAN_OP_OVER, src, buf->pix[0], PIXMAN_a1,
0, 0, 0, 0, 1, &tri);
pixman_image_unref(src);
}
static void
render_csd_button_maximize(struct terminal *term, struct buffer *buf)
{
if (term->window->is_maximized)
render_csd_button_maximize_maximized(term, buf);
else
render_csd_button_maximize_window(term, buf);
}
static void
render_csd_button_close(struct terminal *term, struct buffer *buf)
{
pixman_color_t color = color_hex_to_pixman(term->colors.default_bg);
pixman_image_t *src = pixman_image_create_solid_fill(&color);
const int max_height = buf->height / 3;
const int max_width = buf->width / 3;
int width = min(max_height, max_width);
const int x_margin = (buf->width - width) / 2;
const int y_margin = (buf->height - width) / 2;
pixman_image_fill_rectangles(
PIXMAN_OP_SRC, buf->pix[0], &color, 1,
&(pixman_rectangle16_t){x_margin, y_margin, width, width});
pixman_image_unref(src);
}
static void
render_csd_button(struct terminal *term, enum csd_surface surf_idx)
{
assert(term->window->use_csd == CSD_YES);
assert(surf_idx >= CSD_SURF_MINIMIZE && surf_idx <= CSD_SURF_CLOSE);
struct csd_data info = get_csd_data(term, surf_idx);
struct wl_surface *surf = term->window->csd.surface[surf_idx];
if (info.width == 0 || info.height == 0)
return;
unsigned long cookie = shm_cookie_csd(term, surf_idx);
struct buffer *buf = shm_get_buffer(
term->wl->shm, info.width, info.height, cookie, false, 1);
uint32_t _color;
uint16_t alpha = 0xffff;
bool is_active = false;
const bool *is_set = NULL;
const uint32_t *conf_color = NULL;
switch (surf_idx) {
case CSD_SURF_MINIMIZE:
_color = term->colors.default_table[4]; /* blue */
is_set = &term->conf->csd.color.minimize_set;
conf_color = &term->conf->csd.color.minimize;
is_active = term->active_surface == TERM_SURF_BUTTON_MINIMIZE;
break;
case CSD_SURF_MAXIMIZE:
_color = term->colors.default_table[2]; /* green */
is_set = &term->conf->csd.color.maximize_set;
conf_color = &term->conf->csd.color.maximize;
is_active = term->active_surface == TERM_SURF_BUTTON_MAXIMIZE;
break;
case CSD_SURF_CLOSE:
_color = term->colors.default_table[1]; /* red */
is_set = &term->conf->csd.color.close_set;
conf_color = &term->conf->csd.color.close;
is_active = term->active_surface == TERM_SURF_BUTTON_CLOSE;
break;
default:
assert(false);
break;
}
if (is_active) {
if (*is_set) {
_color = *conf_color;
alpha = _color >> 24 | (_color >> 24 << 8);
}
} else {
_color = 0;
alpha = 0;
}
if (!term->visual_focus)
_color = color_dim(_color);
pixman_color_t color = color_hex_to_pixman_with_alpha(_color, alpha);
render_csd_part(term, surf, buf, info.width, info.height, &color);
switch (surf_idx) {
case CSD_SURF_MINIMIZE: render_csd_button_minimize(term, buf); break;
case CSD_SURF_MAXIMIZE: render_csd_button_maximize(term, buf); break;
case CSD_SURF_CLOSE: render_csd_button_close(term, buf); break;
break;
default:
assert(false);
break;
}
csd_commit(term, surf, buf);
}
static void
render_csd(struct terminal *term)
{
assert(term->window->use_csd == CSD_YES);
if (term->window->is_fullscreen)
return;
for (size_t i = 0; i < CSD_SURF_COUNT; i++) {
struct csd_data info = get_csd_data(term, i);
const int x = info.x;
const int y = info.y;
const int width = info.width;
const int height = info.height;
struct wl_surface *surf = term->window->csd.surface[i];
struct wl_subsurface *sub = term->window->csd.sub_surface[i];
assert(surf != NULL);
assert(sub != NULL);
if (width == 0 || height == 0) {
wl_subsurface_set_position(sub, 0, 0);
wl_surface_attach(surf, NULL, 0, 0);
wl_surface_commit(surf);
continue;
}
wl_subsurface_set_position(sub, x / term->scale, y / term->scale);
}
for (size_t i = CSD_SURF_LEFT; i <= CSD_SURF_BOTTOM; i++)
render_csd_border(term, i);
for (size_t i = CSD_SURF_MINIMIZE; i <= CSD_SURF_CLOSE; i++)
render_csd_button(term, i);
render_csd_title(term);
}
static void
render_osd(struct terminal *term,
struct wl_surface *surf, struct wl_subsurface *sub_surf,
struct buffer *buf,
const wchar_t *text, uint32_t _fg, uint32_t _bg,
unsigned width, unsigned height, unsigned x, unsigned y)
{
pixman_color_t bg = color_hex_to_pixman(_bg);
pixman_image_fill_rectangles(
PIXMAN_OP_SRC, buf->pix[0], &bg, 1,
&(pixman_rectangle16_t){0, 0, width, height});
struct fcft_font *font = term->fonts[0];
pixman_color_t fg = color_hex_to_pixman(_fg);
for (size_t i = 0; i < wcslen(text); i++) {
const struct fcft_glyph *glyph = fcft_glyph_rasterize(
font, text[i], term->font_subpixel);
if (glyph == NULL)
continue;
pixman_image_t *src = pixman_image_create_solid_fill(&fg);
pixman_image_composite32(
PIXMAN_OP_OVER, src, glyph->pix, buf->pix[0], 0, 0, 0, 0,
x + glyph->x, y + font_baseline(term) - glyph->y,
glyph->width, glyph->height);
pixman_image_unref(src);
x += term->cell_width;
}
quirk_weston_subsurface_desync_on(sub_surf);
wl_surface_attach(surf, buf->wl_buf, 0, 0);
wl_surface_damage_buffer(surf, 0, 0, width, height);
wl_surface_set_buffer_scale(surf, term->scale);
struct wl_region *region = wl_compositor_create_region(term->wl->compositor);
if (region != NULL) {
wl_region_add(region, 0, 0, width, height);
wl_surface_set_opaque_region(surf, region);
wl_region_destroy(region);
}
wl_surface_commit(surf);
quirk_weston_subsurface_desync_off(sub_surf);
}
static void
render_scrollback_position(struct terminal *term)
{
if (term->conf->scrollback.indicator.position == SCROLLBACK_INDICATOR_POSITION_NONE)
return;
struct wayland *wayl = term->wl;
struct wl_window *win = term->window;
if (term->grid->view == term->grid->offset) {
if (win->scrollback_indicator_surface != NULL) {
wl_subsurface_destroy(win->scrollback_indicator_sub_surface);
wl_surface_destroy(win->scrollback_indicator_surface);
win->scrollback_indicator_surface = NULL;
win->scrollback_indicator_sub_surface = NULL;
}
return;
}
if (win->scrollback_indicator_surface == NULL) {
win->scrollback_indicator_surface
= wl_compositor_create_surface(wayl->compositor);
if (win->scrollback_indicator_surface == NULL) {
LOG_ERR("failed to create scrollback indicator surface");
return;
}
wl_surface_set_user_data(win->scrollback_indicator_surface, win);
term->window->scrollback_indicator_sub_surface
= wl_subcompositor_get_subsurface(
wayl->sub_compositor,
win->scrollback_indicator_surface,
win->surface);
if (win->scrollback_indicator_sub_surface == NULL) {
LOG_ERR("failed to create scrollback indicator sub-surface");
wl_surface_destroy(win->scrollback_indicator_surface);
win->scrollback_indicator_surface = NULL;
return;
}
wl_subsurface_set_sync(win->scrollback_indicator_sub_surface);
}
assert(win->scrollback_indicator_surface != NULL);
assert(win->scrollback_indicator_sub_surface != NULL);
/* Find absolute row number of the scrollback start */
int scrollback_start = term->grid->offset + term->rows;
int empty_rows = 0;
while (term->grid->rows[scrollback_start & (term->grid->num_rows - 1)] == NULL) {
scrollback_start++;
empty_rows++;
}
/* Rebase viewport against scrollback start (so that 0 is at
* the beginning of the scrollback) */
int rebased_view = term->grid->view - scrollback_start + term->grid->num_rows;
rebased_view &= term->grid->num_rows - 1;
/* How much of the scrollback is actually used? */
int populated_rows = term->grid->num_rows - empty_rows;
assert(populated_rows > 0);
assert(populated_rows <= term->grid->num_rows);
/*
* How far down in the scrollback we are.
*
* 0% -> at the beginning of the scrollback
* 100% -> at the bottom, i.e. where new lines are inserted
*/
double percent =
rebased_view + term->rows == populated_rows
? 1.0
: (double)rebased_view / (populated_rows - term->rows);
wchar_t _text[64];
const wchar_t *text = _text;
int cell_count = 0;
/* *What* to render */
switch (term->conf->scrollback.indicator.format) {
case SCROLLBACK_INDICATOR_FORMAT_PERCENTAGE:
swprintf(_text, sizeof(_text) / sizeof(_text[0]), L"%u%%", (int)(100 * percent));
cell_count = 3;
break;
case SCROLLBACK_INDICATOR_FORMAT_LINENO:
swprintf(_text, sizeof(_text) / sizeof(_text[0]), L"%d", rebased_view + 1);
cell_count = 1 + (int)log10(term->grid->num_rows);
break;
case SCROLLBACK_INDICATOR_FORMAT_TEXT:
text = term->conf->scrollback.indicator.text;
cell_count = wcslen(text);
break;
}
const int scale = term->scale;
const int margin = 3 * scale;
const int width = 2 * margin + cell_count * term->cell_width;
const int height = 2 * margin + term->cell_height;
unsigned long cookie = shm_cookie_scrollback_indicator(term);
struct buffer *buf = shm_get_buffer(
term->wl->shm, width, height, cookie, false, 1);
/* *Where* to render - parent relative coordinates */
int surf_top = 0;
switch (term->conf->scrollback.indicator.position) {
case SCROLLBACK_INDICATOR_POSITION_NONE:
assert(false);
return;
case SCROLLBACK_INDICATOR_POSITION_FIXED:
surf_top = term->cell_height - margin;
break;
case SCROLLBACK_INDICATOR_POSITION_RELATIVE: {
int lines = term->rows - 2; /* Avoid using first and last rows */
if (term->is_searching) {
/* Make sure we don't collide with the scrollback search box */
lines--;
}
assert(lines > 0);
int pixels = lines * term->cell_height - height + 2 * margin;
surf_top = term->cell_height - margin + (int)(percent * pixels);
break;
}
}
wl_subsurface_set_position(
win->scrollback_indicator_sub_surface,
(term->width - margin - width) / scale,
(term->margins.top + surf_top) / scale);
render_osd(
term,
win->scrollback_indicator_surface, win->scrollback_indicator_sub_surface,
buf, text,
term->colors.table[0], term->colors.table[8 + 4],
width, height, width - margin - wcslen(text) * term->cell_width, margin);
}
static void
render_render_timer(struct terminal *term, struct timeval render_time)
{
struct wl_window *win = term->window;
wchar_t text[256];
double usecs = render_time.tv_sec * 1000000 + render_time.tv_usec;
swprintf(text, sizeof(text) / sizeof(text[0]), L"%.2f µs", usecs);
const int cell_count = wcslen(text);
const int margin = 3 * term->scale;
const int width = 2 * margin + cell_count * term->cell_width;
const int height = 2 * margin + term->cell_height;
unsigned long cookie = shm_cookie_render_timer(term);
struct buffer *buf = shm_get_buffer(
term->wl->shm, width, height, cookie, false, 1);
wl_subsurface_set_position(
win->render_timer_sub_surface,
margin / term->scale,
(term->margins.top + term->cell_height - margin) / term->scale);
render_osd(
term,
win->render_timer_surface, win->render_timer_sub_surface,
buf, text,
term->colors.table[0], term->colors.table[8 + 1],
width, height, margin, margin);
}
static void frame_callback(
void *data, struct wl_callback *wl_callback, uint32_t callback_data);
static const struct wl_callback_listener frame_listener = {
.done = &frame_callback,
};
static void
grid_render(struct terminal *term)
{
if (term->is_shutting_down)
return;
struct timeval start_time;
if (term->conf->tweak.render_timer_osd || term->conf->tweak.render_timer_log)
gettimeofday(&start_time, NULL);
assert(term->width > 0);
assert(term->height > 0);
unsigned long cookie = shm_cookie_grid(term);
struct buffer *buf = shm_get_buffer(
term->wl->shm, term->width, term->height, cookie, true, 1 + term->render.workers.count);
/* If we resized the window, or is flashing, or just stopped flashing */
if (term->render.last_buf != buf ||
term->flash.active || term->render.was_flashing ||
term->is_searching != term->render.was_searching ||
term->render.margins)
{
if (term->render.last_buf != NULL &&
term->render.last_buf->width == buf->width &&
term->render.last_buf->height == buf->height &&
!term->flash.active &&
!term->render.was_flashing &&
term->is_searching == term->render.was_searching &&
!term->render.margins)
{
static bool has_warned = false;
if (!has_warned) {
LOG_WARN(
"it appears your Wayland compositor does not support "
"buffer re-use for SHM clients; expect lower "
"performance.");
has_warned = true;
}
assert(term->render.last_buf->size == buf->size);
memcpy(buf->mmapped, term->render.last_buf->mmapped, buf->size);
}
else {
tll_free(term->grid->scroll_damage);
render_margin(term, buf, 0, term->rows, true);
term_damage_view(term);
}
term->render.last_buf = buf;
term->render.was_flashing = term->flash.active;
term->render.was_searching = term->is_searching;
}
tll_foreach(term->grid->scroll_damage, it) {
switch (it->item.type) {
case DAMAGE_SCROLL:
if (term->grid->view == term->grid->offset)
grid_render_scroll(term, buf, &it->item);
break;
case DAMAGE_SCROLL_REVERSE:
if (term->grid->view == term->grid->offset)
grid_render_scroll_reverse(term, buf, &it->item);
break;
case DAMAGE_SCROLL_IN_VIEW:
grid_render_scroll(term, buf, &it->item);
break;
case DAMAGE_SCROLL_REVERSE_IN_VIEW:
grid_render_scroll_reverse(term, buf, &it->item);
break;
}
tll_remove(term->grid->scroll_damage, it);
}
/*
* Ensure selected cells have their 'selected' bit set. This is
* normally "automatically" true - the bit is set when the
* selection is made.
*
* However, if the cell is updated (printed to) while the
* selection is active, the 'selected' bit is cleared. Checking
* for this and re-setting the bit in term_print() is too
* expensive performance wise.
*
* Instead, we synchronize the selection bits here and now. This
* makes the performance impact linear to the number of selected
* cells rather than to the number of updated cells.
*
* (note that selection_dirty_cells() will not set the dirty flag
* on cells where the 'selected' bit is already set)
*/
selection_dirty_cells(term);
/* Mark old cursor cell as dirty, to force it to be re-rendered */
if (term->render.last_cursor.row != NULL && !term->render.last_cursor.hidden) {
struct row *row = term->render.last_cursor.row;
struct cell *cell = &row->cells[term->render.last_cursor.col];
cell->attrs.clean = 0;
row->dirty = true;
}
/* Remember current cursor position, for the next frame */
term->render.last_cursor.row = grid_row(term->grid, term->grid->cursor.point.row);
term->render.last_cursor.col = term->grid->cursor.point.col;
term->render.last_cursor.hidden = term->hide_cursor;
/* Mark current cursor cell as dirty, to ensure it is rendered */
if (!term->hide_cursor) {
const struct coord *cursor = &term->grid->cursor.point;
struct row *row = grid_row(term->grid, cursor->row);
struct cell *cell = &row->cells[cursor->col];
cell->attrs.clean = 0;
row->dirty = true;
}
/* Translate offset-relative row to view-relative, unless cursor
* is hidden, then we just set it to -1 */
struct coord cursor = {-1, -1};
if (!term->hide_cursor) {
cursor = term->grid->cursor.point;
cursor.row += term->grid->offset;
cursor.row -= term->grid->view;
cursor.row &= term->grid->num_rows - 1;
}
render_sixel_images(term, buf->pix[0]);
if (term->render.workers.count > 0) {
mtx_lock(&term->render.workers.lock);
term->render.workers.buf = buf;
for (size_t i = 0; i < term->render.workers.count; i++)
sem_post(&term->render.workers.start);
assert(tll_length(term->render.workers.queue) == 0);
}
int first_dirty_row = -1;
for (int r = 0; r < term->rows; r++) {
struct row *row = grid_row_in_view(term->grid, r);
if (!row->dirty) {
if (first_dirty_row >= 0) {
wl_surface_damage_buffer(
term->window->surface,
term->margins.left,
term->margins.top + first_dirty_row * term->cell_height,
term->width - term->margins.left - term->margins.right,
(r - first_dirty_row) * term->cell_height);
}
first_dirty_row = -1;
continue;
}
if (first_dirty_row < 0)
first_dirty_row = r;
row->dirty = false;
if (term->render.workers.count > 0)
tll_push_back(term->render.workers.queue, r);
else {
int cursor_col = cursor.row == r ? cursor.col : -1;
render_row(term, buf->pix[0], row, r, cursor_col);
}
}
if (first_dirty_row >= 0) {
wl_surface_damage_buffer(
term->window->surface,
term->margins.left,
term->margins.top + first_dirty_row * term->cell_height,
term->width - term->margins.left - term->margins.right,
(term->rows - first_dirty_row) * term->cell_height);
}
/* Signal workers the frame is done */
if (term->render.workers.count > 0) {
for (size_t i = 0; i < term->render.workers.count; i++)
tll_push_back(term->render.workers.queue, -1);
mtx_unlock(&term->render.workers.lock);
for (size_t i = 0; i < term->render.workers.count; i++)
sem_wait(&term->render.workers.done);
term->render.workers.buf = NULL;
}
if (term->flash.active) {
/* Note: alpha is pre-computed in each color component */
/* TODO: dim while searching */
pixman_image_fill_rectangles(
PIXMAN_OP_OVER, buf->pix[0],
&(pixman_color_t){.red=0x7fff, .green=0x7fff, .blue=0, .alpha=0x7fff},
1, &(pixman_rectangle16_t){0, 0, term->width, term->height});
wl_surface_damage_buffer(
term->window->surface, 0, 0, term->width, term->height);
}
render_scrollback_position(term);
if (term->conf->tweak.render_timer_osd || term->conf->tweak.render_timer_log) {
struct timeval end_time;
gettimeofday(&end_time, NULL);
struct timeval render_time;
timersub(&end_time, &start_time, &render_time);
if (term->conf->tweak.render_timer_log) {
LOG_INFO("frame rendered in %llds %lld µs",
(long long)render_time.tv_sec,
(long long)render_time.tv_usec);
}
if (term->conf->tweak.render_timer_osd)
render_render_timer(term, render_time);
}
assert(term->grid->offset >= 0 && term->grid->offset < term->grid->num_rows);
assert(term->grid->view >= 0 && term->grid->view < term->grid->num_rows);
assert(term->window->frame_callback == NULL);
term->window->frame_callback = wl_surface_frame(term->window->surface);
wl_callback_add_listener(term->window->frame_callback, &frame_listener, term);
wl_surface_set_buffer_scale(term->window->surface, term->scale);
if (term->wl->presentation != NULL && term->render.presentation_timings) {
struct timespec commit_time;
clock_gettime(term->wl->presentation_clock_id, &commit_time);
struct wp_presentation_feedback *feedback = wp_presentation_feedback(
term->wl->presentation, term->window->surface);
if (feedback == NULL) {
LOG_WARN("failed to create presentation feedback");
} else {
struct presentation_context *ctx = xmalloc(sizeof(*ctx));
*ctx = (struct presentation_context){
.term = term,
.input.tv_sec = term->render.input_time.tv_sec,
.input.tv_usec = term->render.input_time.tv_nsec / 1000,
.commit.tv_sec = commit_time.tv_sec,
.commit.tv_usec = commit_time.tv_nsec / 1000,
};
wp_presentation_feedback_add_listener(
feedback, &presentation_feedback_listener, ctx);
term->render.input_time.tv_sec = 0;
term->render.input_time.tv_nsec = 0;
}
}
if (term->conf->tweak.damage_whole_window) {
wl_surface_damage_buffer(
term->window->surface, 0, 0, INT32_MAX, INT32_MAX);
}
wl_surface_attach(term->window->surface, buf->wl_buf, 0, 0);
quirk_kde_damage_before_attach(term->window->surface);
wl_surface_commit(term->window->surface);
}
static void
render_search_box(struct terminal *term)
{
assert(term->window->search_sub_surface != NULL);
const size_t wanted_visible_chars = max(20, term->search.len);
assert(term->scale >= 1);
const int scale = term->scale;
const size_t margin = 3 * scale;
const size_t width = term->width - 2 * margin;
const size_t visible_width = min(
term->width - 2 * margin,
2 * margin + wanted_visible_chars * term->cell_width);
const size_t height = min(
term->height - 2 * margin,
2 * margin + 1 * term->cell_height);
const size_t visible_chars = (visible_width - 2 * margin) / term->cell_width;
size_t glyph_offset = term->render.search_glyph_offset;
unsigned long cookie = shm_cookie_search(term);
struct buffer *buf = shm_get_buffer(term->wl->shm, width, height, cookie, false, 1);
/* Background - yellow on empty/match, red on mismatch */
pixman_color_t color = color_hex_to_pixman(
term->search.match_len == term->search.len
? term->colors.table[3] : term->colors.table[1]);
pixman_image_fill_rectangles(
PIXMAN_OP_SRC, buf->pix[0], &color,
1, &(pixman_rectangle16_t){width - visible_width, 0, visible_width, height});
pixman_color_t transparent = color_hex_to_pixman_with_alpha(0, 0);
pixman_image_fill_rectangles(
PIXMAN_OP_SRC, buf->pix[0], &transparent,
1, &(pixman_rectangle16_t){0, 0, width - visible_width, height});
struct fcft_font *font = term->fonts[0];
int x = width - visible_width + margin;
int y = margin;
pixman_color_t fg = color_hex_to_pixman(term->colors.table[0]);
/* Ensure cursor is visible */
if (term->search.cursor < glyph_offset)
term->render.search_glyph_offset = glyph_offset = term->search.cursor;
else if (term->search.cursor > glyph_offset + visible_chars) {
term->render.search_glyph_offset = glyph_offset =
term->search.cursor - min(term->search.cursor, visible_chars);
}
/* Move offset if there is free space available */
if (term->search.len - glyph_offset < visible_chars)
term->render.search_glyph_offset = glyph_offset =
term->search.len - min(term->search.len, visible_chars);
/* Text (what the user entered - *not* match(es)) */
for (size_t i = glyph_offset;
i < term->search.len && i - glyph_offset < visible_chars;
i++)
{
if (i == term->search.cursor)
draw_bar(term, buf->pix[0], font, &fg, x, y);
const struct fcft_glyph *glyph = fcft_glyph_rasterize(
font, term->search.buf[i], term->font_subpixel);
if (glyph == NULL)
continue;
pixman_image_t *src = pixman_image_create_solid_fill(&fg);
pixman_image_composite32(
PIXMAN_OP_OVER, src, glyph->pix, buf->pix[0], 0, 0, 0, 0,
x + glyph->x, y + font_baseline(term) - glyph->y,
glyph->width, glyph->height);
pixman_image_unref(src);
x += term->cell_width;
}
if (term->search.cursor >= term->search.len)
draw_bar(term, buf->pix[0], font, &fg, x, y);
quirk_weston_subsurface_desync_on(term->window->search_sub_surface);
/* TODO: this is only necessary on a window resize */
wl_subsurface_set_position(
term->window->search_sub_surface,
margin / scale,
max(0, (int32_t)term->height - height - margin) / scale);
wl_surface_attach(term->window->search_surface, buf->wl_buf, 0, 0);
wl_surface_damage_buffer(term->window->search_surface, 0, 0, width, height);
wl_surface_set_buffer_scale(term->window->search_surface, scale);
struct wl_region *region = wl_compositor_create_region(term->wl->compositor);
if (region != NULL) {
wl_region_add(region, width - visible_width, 0, visible_width, height);
wl_surface_set_opaque_region(term->window->search_surface, region);
wl_region_destroy(region);
}
wl_surface_commit(term->window->search_surface);
quirk_weston_subsurface_desync_off(term->window->search_sub_surface);
}
static void
render_update_title(struct terminal *term)
{
static const size_t max_len = 2048;
const char *title = term->window_title != NULL ? term->window_title : "foot";
char *copy = NULL;
if (strlen(title) > max_len) {
copy = xstrndup(title, max_len);
title = copy;
}
xdg_toplevel_set_title(term->window->xdg_toplevel, title);
free(copy);
}
static void
frame_callback(void *data, struct wl_callback *wl_callback, uint32_t callback_data)
{
struct terminal *term = data;
assert(term->window->frame_callback == wl_callback);
wl_callback_destroy(wl_callback);
term->window->frame_callback = NULL;
bool grid = term->render.pending.grid;
bool csd = term->render.pending.csd;
bool search = term->render.pending.search;
bool title = term->render.pending.title;
term->render.pending.grid = false;
term->render.pending.csd = false;
term->render.pending.search = false;
term->render.pending.title = false;
if (csd && term->window->use_csd == CSD_YES) {
quirk_weston_csd_on(term);
render_csd(term);
quirk_weston_csd_off(term);
}
if (title)
render_update_title(term);
if (search && term->is_searching)
render_search_box(term);
if (grid && (!term->delayed_render_timer.is_armed || csd || search))
grid_render(term);
}
/* Move to terminal.c? */
static bool
maybe_resize(struct terminal *term, int width, int height, bool force)
{
if (term->is_shutting_down)
return false;
if (!term->window->is_configured)
return false;
if (term->cell_width == 0 && term->cell_height == 0)
return false;
int scale = -1;
tll_foreach(term->window->on_outputs, it) {
if (it->item->scale > scale)
scale = it->item->scale;
}
if (scale == -1) {
/* Haven't 'entered' an output yet? */
scale = term->scale;
}
width *= scale;
height *= scale;
if (width == 0 && height == 0) {
/*
* The compositor is letting us choose the size
*
* If we have a "last" used size - use that. Otherwise, use
* the size from the user configuration.
*/
if (term->stashed_width != 0 && term->stashed_height != 0) {
width = term->stashed_width;
height = term->stashed_height;
} else {
switch (term->conf->size.type) {
case CONF_SIZE_PX:
width = term->conf->size.px.width;
height = term->conf->size.px.height;
if (term->window->use_csd == CSD_YES) {
/* Take CSD title bar into account */
assert(!term->window->is_fullscreen);
height -= term->conf->csd.title_height;
}
width *= scale;
height *= scale;
break;
case CONF_SIZE_CELLS:
width = term->conf->size.cells.width * term->cell_width;
height = term->conf->size.cells.height * term->cell_height;
width += 2 * term->conf->pad_x * scale;
height += 2 * term->conf->pad_y * scale;
/*
* Ensure we can scale to logical size, and back to
* pixels without truncating.
*/
if (width % scale)
width += scale - width % scale;
if (height % scale)
height += scale - height % scale;
assert(width % scale == 0);
assert(height % scale == 0);
break;
}
}
}
/* Don't shrink grid too much */
const int min_cols = 2;
const int min_rows = 1;
/* Minimum window size */
const int min_width = min_cols * term->cell_width;
const int min_height = min_rows * term->cell_height;
width = max(width, min_width);
height = max(height, min_height);
/* Padding */
const int max_pad_x = (width - min_width) / 2;
const int max_pad_y = (height - min_height) / 2;
const int pad_x = min(max_pad_x, scale * term->conf->pad_x);
const int pad_y = min(max_pad_y, scale * term->conf->pad_y);
if (!force && width == term->width && height == term->height && scale == term->scale)
return false;
/* Cancel an application initiated "Synchronized Update" */
term_disable_app_sync_updates(term);
term->width = width;
term->height = height;
term->scale = scale;
const int scrollback_lines = term->render.scrollback_lines;
/* Screen rows/cols before resize */
const int old_cols = term->cols;
const int old_rows = term->rows;
/* Screen rows/cols after resize */
const int new_cols = (term->width - 2 * pad_x) / term->cell_width;
const int new_rows = (term->height - 2 * pad_y) / term->cell_height;
/* Grid rows/cols after resize */
const int new_normal_grid_rows = 1 << (32 - __builtin_clz(new_rows + scrollback_lines - 1));
const int new_alt_grid_rows = 1 << (32 - __builtin_clz(new_rows));
assert(new_cols >= 1);
assert(new_rows >= 1);
/* Margins */
term->margins.left = pad_x;
term->margins.top = pad_y;
term->margins.right = term->width - new_cols * term->cell_width - term->margins.left;
term->margins.bottom = term->height - new_rows * term->cell_height - term->margins.top;
assert(term->margins.left >= pad_x);
assert(term->margins.right >= pad_x);
assert(term->margins.top >= pad_y);
assert(term->margins.bottom >= pad_y);
if (new_cols == old_cols && new_rows == old_rows) {
LOG_DBG("grid layout unaffected; skipping reflow");
goto damage_view;
}
if (term->grid == &term->alt)
selection_cancel(term);
struct coord *const tracking_points[] = {
&term->selection.start,
&term->selection.end,
};
/* Resize grids */
grid_resize_and_reflow(
&term->normal, new_normal_grid_rows, new_cols, old_rows, new_rows,
ALEN(tracking_points), tracking_points,
term->composed_count, term->composed);
grid_resize_without_reflow(
&term->alt, new_alt_grid_rows, new_cols, old_rows, new_rows);
/* Reset tab stops */
tll_free(term->tab_stops);
for (int c = 0; c < new_cols; c += 8)
tll_push_back(term->tab_stops, c);
term->cols = new_cols;
term->rows = new_rows;
sixel_reflow(term);
LOG_DBG("resize: %dx%d, grid: cols=%d, rows=%d "
"(left-margin=%d, right-margin=%d, top-margin=%d, bottom-margin=%d)",
term->width, term->height, term->cols, term->rows,
term->margins.left, term->margins.right, term->margins.top, term->margins.bottom);
/* Signal TIOCSWINSZ */
if (term->ptmx >= 0 && ioctl(term->ptmx, (unsigned int)TIOCSWINSZ,
&(struct winsize){
.ws_row = term->rows,
.ws_col = term->cols,
.ws_xpixel = term->cols * term->cell_width,
.ws_ypixel = term->rows * term->cell_height}) == -1)
{
LOG_ERRNO("TIOCSWINSZ");
}
if (term->scroll_region.start >= term->rows)
term->scroll_region.start = 0;
if (term->scroll_region.end >= old_rows)
term->scroll_region.end = term->rows;
term->render.last_cursor.row = NULL;
damage_view:
if (!term->window->is_maximized &&
!term->window->is_fullscreen &&
!term->window->is_tiled)
{
/* Stash current size, to enable us to restore it when we're
* being un-maximized/fullscreened/tiled */
term->stashed_width = term->width;
term->stashed_height = term->height;
}
#if 0
/* TODO: doesn't include CSD title bar */
xdg_toplevel_set_min_size(
term->window->xdg_toplevel, min_width / scale, min_height / scale);
#endif
{
bool title_shown = !term->window->is_fullscreen &&
term->window->use_csd == CSD_YES;
int title_height = title_shown ? term->conf->csd.title_height : 0;
xdg_surface_set_window_geometry(
term->window->xdg_surface,
0,
-title_height,
term->width / term->scale,
term->height / term->scale + title_height);
}
tll_free(term->normal.scroll_damage);
tll_free(term->alt.scroll_damage);
term->render.last_buf = NULL;
term_damage_view(term);
render_refresh_csd(term);
render_refresh_search(term);
render_refresh(term);
return true;
}
bool
render_resize(struct terminal *term, int width, int height)
{
return maybe_resize(term, width, height, false);
}
bool
render_resize_force(struct terminal *term, int width, int height)
{
return maybe_resize(term, width, height, true);
}
static void xcursor_callback(
void *data, struct wl_callback *wl_callback, uint32_t callback_data);
static const struct wl_callback_listener xcursor_listener = {
.done = &xcursor_callback,
};
static void
render_xcursor_update(struct seat *seat)
{
/* If called from a frame callback, we may no longer have mouse focus */
if (!seat->mouse_focus)
return;
assert(seat->pointer.xcursor != NULL);
if (seat->pointer.xcursor == XCURSOR_HIDDEN) {
/* Hide cursor */
wl_surface_attach(seat->pointer.surface, NULL, 0, 0);
wl_surface_commit(seat->pointer.surface);
return;
}
seat->pointer.cursor = wl_cursor_theme_get_cursor(
seat->pointer.theme, seat->pointer.xcursor);
if (seat->pointer.cursor == NULL) {
LOG_ERR("failed to load xcursor pointer '%s'", seat->pointer.xcursor);
return;
}
const int scale = seat->pointer.scale;
struct wl_cursor_image *image = seat->pointer.cursor->images[0];
wl_surface_attach(
seat->pointer.surface, wl_cursor_image_get_buffer(image), 0, 0);
wl_pointer_set_cursor(
seat->wl_pointer, seat->pointer.serial,
seat->pointer.surface,
image->hotspot_x / scale, image->hotspot_y / scale);
wl_surface_damage_buffer(
seat->pointer.surface, 0, 0, INT32_MAX, INT32_MAX);
wl_surface_set_buffer_scale(seat->pointer.surface, scale);
assert(seat->pointer.xcursor_callback == NULL);
seat->pointer.xcursor_callback = wl_surface_frame(seat->pointer.surface);
wl_callback_add_listener(seat->pointer.xcursor_callback, &xcursor_listener, seat);
wl_surface_commit(seat->pointer.surface);
}
static void
xcursor_callback(void *data, struct wl_callback *wl_callback, uint32_t callback_data)
{
struct seat *seat = data;
assert(seat->pointer.xcursor_callback == wl_callback);
wl_callback_destroy(wl_callback);
seat->pointer.xcursor_callback = NULL;
if (seat->pointer.xcursor_pending) {
render_xcursor_update(seat);
seat->pointer.xcursor_pending = false;
}
}
static void
fdm_hook_refresh_pending_terminals(struct fdm *fdm, void *data)
{
struct renderer *renderer = data;
struct wayland *wayl = renderer->wayl;
tll_foreach(renderer->wayl->terms, it) {
struct terminal *term = it->item;
if (!term->render.refresh.grid &&
!term->render.refresh.csd &&
!term->render.refresh.search)
{
continue;
}
if (term->render.app_sync_updates.enabled &&
!term->render.refresh.csd &&
!term->render.refresh.search)
{
continue;
}
if (term->render.refresh.csd || term->render.refresh.search) {
/* Force update of parent surface */
term->render.refresh.grid = true;
}
assert(term->window->is_configured);
bool grid = term->render.refresh.grid;
bool csd = term->render.refresh.csd;
bool search = term->render.refresh.search;
bool title = term->render.refresh.title;
term->render.refresh.grid = false;
term->render.refresh.csd = false;
term->render.refresh.search = false;
term->render.refresh.title = false;
if (term->window->frame_callback == NULL) {
if (csd && term->window->use_csd == CSD_YES) {
quirk_weston_csd_on(term);
render_csd(term);
quirk_weston_csd_off(term);
}
if (title)
render_update_title(term);
if (search)
render_search_box(term);
if (grid)
grid_render(term);
} else {
/* Tells the frame callback to render again */
term->render.pending.grid |= grid;
term->render.pending.csd |= csd;
term->render.pending.search |= search;
term->render.pending.title |= title;
}
}
tll_foreach(wayl->seats, it) {
if (it->item.pointer.xcursor_pending) {
if (it->item.pointer.xcursor_callback == NULL) {
render_xcursor_update(&it->item);
it->item.pointer.xcursor_pending = false;
} else {
/* Frame callback will call render_xcursor_update() */
}
}
}
}
void
render_refresh_title(struct terminal *term)
{
term->render.refresh.title = true;
}
void
render_refresh(struct terminal *term)
{
term->render.refresh.grid = true;
}
void
render_refresh_csd(struct terminal *term)
{
if (term->window->use_csd == CSD_YES)
term->render.refresh.csd = true;
}
void
render_refresh_search(struct terminal *term)
{
if (term->is_searching)
term->render.refresh.search = true;
}
bool
render_xcursor_set(struct seat *seat, struct terminal *term, const char *xcursor)
{
if (seat->pointer.theme == NULL)
return false;
if (seat->mouse_focus == NULL) {
seat->pointer.xcursor = NULL;
return true;
}
if (seat->mouse_focus != term) {
/* This terminal doesn't have mouse focus */
return true;
}
if (seat->pointer.xcursor == xcursor)
return true;
/* FDM hook takes care of actual rendering */
seat->pointer.xcursor_pending = true;
seat->pointer.xcursor = xcursor;
return true;
}
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