Unpremultiply both color0 and color1upstream/remove-unpremultiply

1 files changed, 7 insertions, 3 deletions

diff --git a/src/mbgl/shaders/raster.cpp b/src/mbgl/shaders/raster.cpp
index e7739b4738..3bdf8b23d7 100644
--- a/src/mbgl/shaders/raster.cpp
+++ b/src/mbgl/shaders/raster.cpp
@@ -46,11 +46,15 @@ void main() {
     vec4 color0 = texture2D(u_image0, v_pos0);
     vec4 color1 = texture2D(u_image1, v_pos1);
     vec4 color = mix(color0, color1, u_fade_t);
+    if (color0.a > 0.0) {
+        color0.rgb = color0.rgb / color0.a;
+    }
+    if (color1.a > 0.0) {
+        color1.rgb = color1.rgb / color1.a;
+    }
+
     color.a *= u_opacity;
     vec3 rgb = color.rgb;
-    if (color.a > 0.0) {
-        rgb = color.rgb / color.a;
-    }
 
     // spin
     rgb = vec3(