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

3 files changed, 6 insertions, 14 deletions

diff --git a/source/blender/gpu/intern/gpu_backend.hh b/source/blender/gpu/intern/gpu_backend.hh
index 06aff94dffe..330c7d59b6d 100644
--- a/source/blender/gpu/intern/gpu_backend.hh
+++ b/source/blender/gpu/intern/gpu_backend.hh
@@ -43,6 +43,8 @@ class GPUBackend {
 
   static GPUBackend *get(void);
 
+  virtual void samplers_update(void) = 0;
+
   virtual GPUContext *context_alloc(void *ghost_window) = 0;
 
   virtual Batch *batch_alloc(void) = 0;
diff --git a/source/blender/gpu/intern/gpu_extensions.cc b/source/blender/gpu/intern/gpu_extensions.cc
index 6fe08d81cda..b473e719211 100644
--- a/source/blender/gpu/intern/gpu_extensions.cc
+++ b/source/blender/gpu/intern/gpu_extensions.cc
@@ -386,13 +386,11 @@ void gpu_extensions_init(void)
   }
 
   GPU_invalid_tex_init();
-  GPU_samplers_init();
 }
 
 void gpu_extensions_exit(void)
 {
   GPU_invalid_tex_free();
-  GPU_samplers_free();
 }
 
 bool GPU_mem_stats_supported(void)
diff --git a/source/blender/gpu/intern/gpu_texture.cc b/source/blender/gpu/intern/gpu_texture.cc
index 9d431ef4648..d75dc9b728a 100644
--- a/source/blender/gpu/intern/gpu_texture.cc
+++ b/source/blender/gpu/intern/gpu_texture.cc
@@ -482,6 +482,7 @@ void GPU_texture_bind_ex(GPUTexture *tex_,
                          const bool UNUSED(set_number))
 {
   Texture *tex = reinterpret_cast<Texture *>(tex_);
+  state = (state >= GPU_SAMPLER_MAX) ? tex->sampler_state : state;
   GPU_context_active_get()->state_manager->texture_bind(tex, state, unit);
 }
 
@@ -717,19 +718,10 @@ void GPU_texture_get_mipmap_size(GPUTexture *tex, int lvl, int *r_size)
  * Override texture sampler state for one sampler unit only.
  * \{ */
 
-void GPU_samplers_init(void)
+/* Update user defined sampler states. */
+void GPU_samplers_update(void)
 {
-  /* TODO(fclem) port samplers to GLTextures. */
-}
-
-void GPU_sampler_icon_bind(int UNUSED(unit))
-{
-  /* TODO(fclem) port samplers to GLTextures. */
-}
-
-void GPU_samplers_free(void)
-{
-  /* TODO(fclem) port samplers to GLTextures. */
+  GPUBackend::get()->samplers_update();
 }
 
 /** \} */