[Bf-blender-cvs] [5d8ed832a4c] greasepencil-refactor: GPencil: Refactor: Fix mask blending

[Clément Foucault]

Commit: 5d8ed832a4c17ee94c57ca52d409339e00f5810b
Author: Clément Foucault
Date:   Mon Dec 16 01:18:32 2019 +0100
Branches: greasepencil-refactor
https://developer.blender.org/rB5d8ed832a4c17ee94c57ca52d409339e00f5810b

GPencil: Refactor: Fix mask blending

===================================================================

M	source/blender/draw/engines/gpencil/shaders/gpencil_layer_mask_frag.glsl

===================================================================

diff --git a/source/blender/draw/engines/gpencil/shaders/gpencil_layer_mask_frag.glsl b/source/blender/draw/engines/gpencil/shaders/gpencil_layer_mask_frag.glsl
index 8aebd80da9f..3889c42b04f 100644
--- a/source/blender/draw/engines/gpencil/shaders/gpencil_layer_mask_frag.glsl
+++ b/source/blender/draw/engines/gpencil/shaders/gpencil_layer_mask_frag.glsl
@@ -18,9 +18,8 @@ void main()
 
   if (isFirstPass) {
     /* Blend mode is multiply. */
-    fragColor = vec4(1.0);
-    fragRevealage.rgb = mix(vec3(1.0), masked_reveal, mask);
-    fragRevealage.a = 1.0;
+    fragColor.rgb = fragRevealage.rgb = mix(vec3(1.0), masked_reveal, mask);
+    fragColor.a = fragRevealage.a = 1.0;
   }
   else {
     /* Blend mode is additive. */