Flip BGRA surface texture sampling

2026-05-13 09:51:59 -04:00
parent 8238526cc1
commit 9212b0be24
1 changed files with 5 additions and 1 deletions
@@ -890,7 +890,11 @@ fragment float4 surface_bgra_fragment(SurfaceFragmentInput input [[stage_in]],
                                      texture2d<float> bgra_texture
                                      [[texture(SurfaceInputIndex_YTexture)]]) {
  constexpr sampler texture_sampler(mag_filter::linear, min_filter::linear);
-  return bgra_texture.sample(texture_sampler, input.texture_position);
+  // Servo's CGL-backed IOSurfaces use the opposite framebuffer origin from
+  // GPUI's surface quad, so flip both texture axes for browser frames.
+  float2 texture_position =
+      float2(1.0 - input.texture_position.x, 1.0 - input.texture_position.y);
+  return bgra_texture.sample(texture_sampler, texture_position);
 }

 float4 hsla_to_rgba(Hsla hsla) {