[Bf-blender-cvs] [ac1a6565dfe] blender-v2.83-release: Fix T76113 GPU: Crash closing file browsers with AMD GPUs

[Clément Foucault]

Commit: ac1a6565dfe7f2e784df106e219f2b9444f34ca9
Author: Clément Foucault
Date:   Tue May 12 17:56:32 2020 +0200
Branches: blender-v2.83-release
https://developer.blender.org/rBac1a6565dfe7f2e784df106e219f2b9444f34ca9

Fix T76113 GPU: Crash closing file browsers with AMD GPUs

This fixes crash in the free mesa driver for amd gpus. This crash seems to
only happen on linux.

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

M	source/blender/editors/screen/area.c

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

diff --git a/source/blender/editors/screen/area.c b/source/blender/editors/screen/area.c
index 49838b62b71..94937ce9db8 100644
--- a/source/blender/editors/screen/area.c
+++ b/source/blender/editors/screen/area.c
@@ -249,7 +249,9 @@ static void draw_azone_arrow(float x1, float y1, float x2, float y2, AZEdge edge
   uint pos = GPU_vertformat_attr_add(format, "pos", GPU_COMP_F32, 2, GPU_FETCH_FLOAT);
 
   GPU_blend(true);
-  immBindBuiltinProgram(GPU_SHADER_2D_UNIFORM_COLOR);
+  /* NOTE(fclem): There is something strange going on with Mesa and GPU_SHADER_2D_UNIFORM_COLOR
+   * that causes a crash on some GPUs (see T76113). Using 3D variant avoid the issue. */
+  immBindBuiltinProgram(GPU_SHADER_3D_UNIFORM_COLOR);
   immUniformColor4f(0.8f, 0.8f, 0.8f, 0.4f);
 
   immBegin(GPU_PRIM_TRI_FAN, 6);