Fixed custom shader example to correctly use premultiplied colors.

Reviewed-by: Gunnar

1 files changed, 1 insertions, 1 deletions

diff --git a/examples/effects/customshader/customshadereffect.cpp b/examples/effects/customshader/customshadereffect.cpp
index 69fdb15474..c5ac3e32b1 100644
--- a/examples/effects/customshader/customshadereffect.cpp
+++ b/examples/effects/customshader/customshadereffect.cpp
@@ -48,7 +48,7 @@ static char const colorizeShaderCode[] =
     "    vec4 src = texture2D(imageTexture, textureCoords);\n"
     "    float gray = dot(src.rgb, vec3(0.212671, 0.715160, 0.072169));\n"
     "    vec4 colorize = 1.0-((1.0-gray)*(1.0-effectColor));\n"
-    "    return vec4(colorize.rgb, src.a);\n"
+    "    return vec4(colorize.rgb * src.a, src.a);\n"
     "}";
 
 CustomShaderEffect::CustomShaderEffect()