From 3ee2ca0d3cd3961e5e68c58383e2ac23c3f8e0f8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20Foucault?= <foucault.clem@gmail.com>
Date: Sun, 13 Sep 2020 15:51:46 +0200
Subject: 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.
---
 .../draw/engines/workbench/shaders/workbench_merge_infront_frag.glsl    | 2 ++
 1 file changed, 2 insertions(+)

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;
-- 
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