Switch default renderer to webrender, and update webrender.

resources/shaders/ps_blend.fs.glsl

@@ -6,5 +6,5 @@ uniform sampler2D sCache;
 
 void main(void) {
     vec4 color = texture(sCache, vUv);
-    oFragColor = vec4(color.rgb, color.a * vOpacity);
+    oFragColor = vec4(color.rgb * vBrightnessOpacity.x, color.a * vBrightnessOpacity.y);
 }

resources/shaders/ps_blend.glsl

@@ -3,4 +3,4 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 varying vec2 vUv;
-varying float vOpacity;
+varying vec2 vBrightnessOpacity;

resources/shaders/ps_blend.vs.glsl

@@ -15,7 +15,7 @@ void main(void) {
     vec2 st0 = vec2(src.target_rect.xy) / 2048.0;
     vec2 st1 = vec2(src.target_rect.xy + src.target_rect.zw) / 2048.0;
     vUv = mix(st0, st1, aPosition.xy);
-    vOpacity = blend.src_id_target_id_opacity.z;
+    vBrightnessOpacity = blend.src_id_target_id_opacity.zw;
 
     gl_Position = uTransform * vec4(local_pos, 0, 1);
 }

resources/shaders/ps_image_clip.fs.glsl

@@ -6,7 +6,7 @@
 
 void main(void) {
 #ifdef WR_FEATURE_TRANSFORM
-    float alpha = 1;
+    float alpha = 1.f;
     vec2 local_pos = init_transform_fs(vLocalPos, vLocalRect, alpha);
 
     // We clamp the texture coordinate calculation here to the local rectangle boundaries,
@@ -14,7 +14,7 @@ void main(void) {
     vec2 pos_for_texture =
          clamp(pos, vLocalRect.xy, vLocalRect.xy + vLocalRect.zw) - vLocalRect.xy;
 #else
-    float alpha = 1;
+    float alpha = 1.f;
     vec2 local_pos = vLocalPos;
     vec2 relative_pos_in_rect = vLocalPos - vLocalRect.xy;
 #endif

resources/shaders/ps_rectangle_clip.fs.glsl

@@ -4,10 +4,10 @@
 
 void main(void) {
 #ifdef WR_FEATURE_TRANSFORM
-    float alpha = 1;
+    float alpha = 1.f;
     vec2 local_pos = init_transform_fs(vPos, vLocalRect, alpha);
 #else
-    float alpha = 1;
+    float alpha = 1.f;
     vec2 local_pos = vPos;
 #endif