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Pipewire: support alpha textures again, do alpha blending and clear

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background if fourcc is alpha.
This commit is contained in:
dec05eba
2025-07-20 22:04:54 +02:00
parent 4fb0dad3df
commit 1e62e654e2
5 changed files with 38 additions and 22 deletions
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19
src/capture/portal.c
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@@ -319,6 +319,15 @@ static bool gsr_capture_portal_capture_has_synchronous_task(gsr_capture *cap) {
return gsr_pipewire_video_should_restart(&self->pipewire);
}
static bool fourcc_has_alpha(uint32_t fourcc) {
const uint8_t *p = (const uint8_t*)&fourcc;
for(int i = 0; i < 4; ++i) {
if(p[i] == 'A')
return true;
}
return false;
}
static int gsr_capture_portal_capture(gsr_capture *cap, gsr_capture_metadata *capture_metadata, gsr_color_conversion *color_conversion) {
(void)color_conversion;
gsr_capture_portal *self = cap->priv;
@@ -361,10 +370,14 @@ static int gsr_capture_portal_capture(gsr_capture *cap, gsr_capture_metadata *ca
// TODO: Handle region crop
const bool fourcc_alpha = fourcc_has_alpha(self->pipewire_fourcc);
if(fourcc_alpha)
gsr_color_conversion_clear(color_conversion);
gsr_color_conversion_draw(color_conversion, self->using_external_image ? self->texture_map.external_texture_id : self->texture_map.texture_id,
target_pos, output_size,
(vec2i){self->region.x, self->region.y}, self->capture_size, self->capture_size,
GSR_ROT_0, GSR_SOURCE_COLOR_RGB, self->using_external_image, false);
target_pos, output_size,
(vec2i){self->region.x, self->region.y}, self->capture_size, self->capture_size,
GSR_ROT_0, GSR_SOURCE_COLOR_RGB, self->using_external_image, fourcc_alpha);
if(self->params.record_cursor && self->texture_map.cursor_texture_id > 0 && self->cursor_region.width > 0) {
const vec2d scale = {