GPU: Compute Pipeline.

With the compute pipeline calculation can be offloaded to the GPU.
This patch only adds the framework for compute. So no changes for users at
this moment.

NOTE: As this is an OpenGL4.3 feature it must always have a fallback.

Use `GPU_compute_shader_support` to check if compute pipeline can be used.
Check `gpu_shader_compute*` test cases for usage.

This patch also adds support for shader storage buffer objects and device only
vertex/index buffers.

An alternative that had been discussed was adding this to the `GPUBatch`, this
was eventually not chosen as it would lead to more code when used as part of a
shading group. The idea is that we add an `eDRWCommandType` in the near
future.

Reviewed By: fclem

Differential Revision: https://developer.blender.org/D10913

1 files changed, 10 insertions, 0 deletions

diff --git a/source/blender/gpu/intern/gpu_capabilities.cc b/source/blender/gpu/intern/gpu_capabilities.cc
index d8764502800..bedc9ad3092 100644
--- a/source/blender/gpu/intern/gpu_capabilities.cc
+++ b/source/blender/gpu/intern/gpu_capabilities.cc
@@ -148,6 +148,16 @@ bool GPU_use_hq_normals_workaround(void)
   return GCaps.use_hq_normals_workaround;
 }
 
+bool GPU_compute_shader_support(void)
+{
+  return GCaps.compute_shader_support;
+}
+
+bool GPU_shader_storage_buffer_objects_support(void)
+{
+  return GCaps.shader_storage_buffer_objects_support;
+}
+
 bool GPU_shader_image_load_store_support(void)
 {
   return GCaps.shader_image_load_store_support;