EEVEE: Fix volumetric resolve in large scenes.

On NVIDIA volumetric resolve failed for large production scenes.
The result would remove most color from the final render. The cause
seems to be a faulty driver.

This change ported the fragment shader to a compute shader which
would select a different compiler branch and didn't show the error.

1 files changed, 4 insertions, 0 deletions

diff --git a/source/blender/draw/intern/DRW_render.h b/source/blender/draw/intern/DRW_render.h
index 7b80ffd2b88..b49203d85f6 100644
--- a/source/blender/draw/intern/DRW_render.h
+++ b/source/blender/draw/intern/DRW_render.h
@@ -207,6 +207,10 @@ struct GPUShader *DRW_shader_create_with_lib_ex(const char *vert,
                                                 const char *lib,
                                                 const char *defines,
                                                 const char *name);
+struct GPUShader *DRW_shader_create_compute_with_shaderlib(const char *comp,
+                                                           const DRWShaderLibrary *lib,
+                                                           const char *defines,
+                                                           const char *name);
 struct GPUShader *DRW_shader_create_with_shaderlib_ex(const char *vert,
                                                       const char *geom,
                                                       const char *frag,