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wlr_scene: Add opaque region blend mode optimization 

If we are only rendering within a region of the surface that is
advertised as opaque, we can choose no blending
This commit is contained in:
Alexander Orzechowski 2023-06-26 13:39:30 -04:00 committed by Simon Ser
parent 9b9ee51b09
commit ea3c6fde3a
1 changed files with 10 additions and 2 deletions
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12
types/scene/wlr_scene.c
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@ -817,7 +817,7 @@ void wlr_scene_buffer_set_opacity(struct wlr_scene_buffer *scene_buffer,
}
void wlr_scene_buffer_set_filter_mode(struct wlr_scene_buffer *scene_buffer,
enum wlr_scale_filter_mode filter_mode) {
enum wlr_scale_filter_mode filter_mode) {
if (scene_buffer->filter_mode == filter_mode) {
return;
}
@ -1089,7 +1089,6 @@ struct wlr_scene_node *wlr_scene_node_at(struct wlr_scene_node *node,
return NULL;
}
static void scene_node_render(struct wlr_scene_node *node, const struct render_data *data) {
int x, y;
wlr_scene_node_coords(node, &x, &y);
@ -1114,6 +1113,12 @@ static void scene_node_render(struct wlr_scene_node *node, const struct render_d
scene_node_get_size(node, &dst_box.width, &dst_box.height);
scale_box(&dst_box, data->scale);
pixman_region32_t opaque;
pixman_region32_init(&opaque);
scene_node_opaque_region(node, x, y, &opaque);
scale_output_damage(&opaque, data->scale);
pixman_region32_subtract(&opaque, &render_region, &opaque);
transform_output_box(&dst_box, data);
transform_output_damage(&render_region, data);
@ -1157,12 +1162,15 @@ static void scene_node_render(struct wlr_scene_node *node, const struct render_d
.clip = &render_region,
.alpha = &scene_buffer->opacity,
.filter_mode = scene_buffer->filter_mode,
.blend_mode = pixman_region32_not_empty(&opaque) ?
WLR_RENDER_BLEND_MODE_PREMULTIPLIED : WLR_RENDER_BLEND_MODE_NONE,
});
wl_signal_emit_mutable(&scene_buffer->events.output_present, data->output);
break;
}
pixman_region32_fini(&opaque);
pixman_region32_fini(&render_region);
}