tor-browser

commit 46c59a7ee8f946389bc35d6fad2272f36b8a32c2
parent ee48e485917c6f256be21b2820d32ff91a5955e6
Author: Sotaro Ikeda <sotaro.ikeda.g@gmail.com>
Date:   Thu, 11 Dec 2025 01:01:12 +0000

Bug 1972954 - Check more tile occlusion for layer compositor in PicturePrimitive::take_context() r=gfx-reviewers,gw

Differential Revision: https://phabricator.services.mozilla.com/D275736

Diffstat:
M
gfx/wr/webrender/src/picture.rs
 | 
12
++++++++++--

1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/gfx/wr/webrender/src/picture.rs b/gfx/wr/webrender/src/picture.rs
@@ -5324,8 +5324,16 @@ impl PicturePrimitive {
                             // code below.
                             match world_draw_rect {
                                 Some(world_draw_rect) => {
-                                    // Only check for occlusion on visible tiles that are fixed position.
-                                    if tile_cache.spatial_node_index == frame_context.root_spatial_node_index &&
+                                    let check_occluded_tiles = match frame_state.composite_state.compositor_kind {
+                                        CompositorKind::Layer { .. } => {
+                                            true
+                                        }
+                                        CompositorKind::Native { .. } | CompositorKind::Draw { .. } => {
+                                            // Only check for occlusion on visible tiles that are fixed position.
+                                            tile_cache.spatial_node_index == frame_context.root_spatial_node_index
+                                        }
+                                    };
+                                    if check_occluded_tiles &&
                                        frame_state.composite_state.occluders.is_tile_occluded(tile.z_id, world_draw_rect) {
                                         // If this tile has an allocated native surface, free it, since it's completely
                                         // occluded. We will need to re-allocate this surface if it becomes visible,