GPUTexture: Add support for samplers

This just add back the support.
This commit also includes a bit of cleanup.

# Conflicts:
#	source/blender/gpu/GPU_texture.h

1 files changed, 14 insertions, 0 deletions

diff --git a/source/blender/gpu/opengl/gl_backend.hh b/source/blender/gpu/opengl/gl_backend.hh
index 6029ff9e309..f769d9c1cfe 100644
--- a/source/blender/gpu/opengl/gl_backend.hh
+++ b/source/blender/gpu/opengl/gl_backend.hh
@@ -43,11 +43,25 @@ class GLBackend : public GPUBackend {
   GLSharedOrphanLists shared_orphan_list_;
 
  public:
+  GLBackend()
+  {
+    GLTexture::samplers_init();
+  }
+  ~GLBackend()
+  {
+    GLTexture::samplers_free();
+  }
+
   static GLBackend *get(void)
   {
     return static_cast<GLBackend *>(GPUBackend::get());
   }
 
+  void samplers_update(void) override
+  {
+    GLTexture::samplers_update();
+  };
+
   GPUContext *context_alloc(void *ghost_window)
   {
     return new GLContext(ghost_window, shared_orphan_list_);