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swaynag: reduce roundtrips when rendering frames

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This reduces flicker when toggling the detail view.
This commit is contained in:
Manuel Stoeckl 2024-11-08 21:45:15 -05:00
parent 2535a2e9f9
commit 131026b190
1 changed files with 33 additions and 28 deletions
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61
swaynag/render.c
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@ -260,39 +260,44 @@ void render_frame(struct swaynag *swaynag) {
cairo_paint(cairo);
cairo_restore(cairo);
uint32_t height = render_to_cairo(cairo, swaynag);
if (swaynag->height == 0) {
// for first commit, set required size but do not attach a buffer
zwlr_layer_surface_v1_set_size(swaynag->layer_surface, 0, height);
zwlr_layer_surface_v1_set_exclusive_zone(swaynag->layer_surface,
height);
wl_surface_commit(swaynag->surface);
goto cleanup;
}
if (height != swaynag->height) {
zwlr_layer_surface_v1_set_size(swaynag->layer_surface, 0, height);
zwlr_layer_surface_v1_set_exclusive_zone(swaynag->layer_surface,
height);
wl_surface_commit(swaynag->surface);
wl_display_roundtrip(swaynag->display);
} else {
swaynag->current_buffer = get_next_buffer(swaynag->shm,
swaynag->buffers,
swaynag->width * swaynag->scale,
swaynag->height * swaynag->scale);
if (!swaynag->current_buffer) {
sway_log(SWAY_DEBUG, "Failed to get buffer. Skipping frame.");
goto cleanup;
}
cairo_t *shm = swaynag->current_buffer->cairo;
cairo_save(shm);
cairo_set_operator(shm, CAIRO_OPERATOR_CLEAR);
cairo_paint(shm);
cairo_restore(shm);
cairo_set_source_surface(shm, recorder, 0.0, 0.0);
cairo_paint(shm);
wl_surface_set_buffer_scale(swaynag->surface, swaynag->scale);
wl_surface_attach(swaynag->surface,
swaynag->current_buffer->buffer, 0, 0);
wl_surface_damage(swaynag->surface, 0, 0,
swaynag->width, swaynag->height);
wl_surface_commit(swaynag->surface);
wl_display_roundtrip(swaynag->display);
height);
}
swaynag->current_buffer = get_next_buffer(swaynag->shm,
swaynag->buffers,
swaynag->width * swaynag->scale,
height * swaynag->scale);
if (!swaynag->current_buffer) {
sway_log(SWAY_DEBUG, "Failed to get buffer. Skipping frame.");
goto cleanup;
}
cairo_t *shm = swaynag->current_buffer->cairo;
cairo_save(shm);
cairo_set_operator(shm, CAIRO_OPERATOR_CLEAR);
cairo_paint(shm);
cairo_restore(shm);
cairo_set_source_surface(shm, recorder, 0.0, 0.0);
cairo_paint(shm);
wl_surface_set_buffer_scale(swaynag->surface, swaynag->scale);
wl_surface_attach(swaynag->surface,
swaynag->current_buffer->buffer, 0, 0);
wl_surface_damage(swaynag->surface, 0, 0,
swaynag->width, swaynag->height);
wl_surface_commit(swaynag->surface);
cleanup:
cairo_surface_destroy(recorder);
cairo_destroy(cairo);