[Bf-blender-cvs] [3ee2ca0d3cd] master: Fix T80023 Invisible objects or glitches with object 'in front' + 'X-ray'

[Clément Foucault]

Commit: 3ee2ca0d3cd3961e5e68c58383e2ac23c3f8e0f8
Author: Clément Foucault
Date:   Sun Sep 13 15:51:46 2020 +0200
Branches: master
https://developer.blender.org/rB3ee2ca0d3cd3961e5e68c58383e2ac23c3f8e0f8

Fix T80023 Invisible objects or glitches with object 'in front' + 'X-ray'

Rendering only to the depth buffer seems to need a valid fragment shader
with a color output on some platform.

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

M	source/blender/draw/engines/workbench/shaders/workbench_merge_infront_frag.glsl

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

diff --git a/source/blender/draw/engines/workbench/shaders/workbench_merge_infront_frag.glsl b/source/blender/draw/engines/workbench/shaders/workbench_merge_infront_frag.glsl
index b77e168889f..856654549ca 100644
--- a/source/blender/draw/engines/workbench/shaders/workbench_merge_infront_frag.glsl
+++ b/source/blender/draw/engines/workbench/shaders/workbench_merge_infront_frag.glsl
@@ -8,6 +8,8 @@ out vec4 fragColor;
 void main()
 {
   float depth = texture(depthBuffer, uvcoordsvar.st).r;
+  /* Fix issues with Intel drivers (see T80023). */
+  fragColor = vec4(0.0);
   /* Discard background pixels. */
   if (depth == 1.0) {
     discard;