Cleanup: GPU: Encapsulate clipDistances

This also remove some non functionnal state changes that were left
from legacy code.

2 files changed, 13 insertions, 0 deletions

diff --git a/source/blender/gpu/GPU_state.h b/source/blender/gpu/GPU_state.h
index 0f0a8a5dd6e..8d50330ac93 100644
--- a/source/blender/gpu/GPU_state.h
+++ b/source/blender/gpu/GPU_state.h
@@ -86,6 +86,7 @@ void GPU_depth_mask(bool depth);
 bool GPU_depth_mask_get(void);
 void GPU_stencil_mask(uint stencil);
 void GPU_unpack_row_length_set(uint len);
+void GPU_clip_distances(int enabled_len);
 
 void GPU_flush(void);
 void GPU_finish(void);
diff --git a/source/blender/gpu/intern/gpu_state.c b/source/blender/gpu/intern/gpu_state.c
index f1b842403f9..bd7aff9772b 100644
--- a/source/blender/gpu/intern/gpu_state.c
+++ b/source/blender/gpu/intern/gpu_state.c
@@ -256,6 +256,18 @@ void GPU_stencil_mask(uint stencil)
   glStencilMask(stencil);
 }
 
+void GPU_clip_distances(int distances_new)
+{
+  static int distances_enabled = 0;
+  for (int i = 0; i < distances_new; i++) {
+    glEnable(GL_CLIP_DISTANCE0 + i);
+  }
+  for (int i = distances_new; i < distances_enabled; i++) {
+    glDisable(GL_CLIP_DISTANCE0 + i);
+  }
+  distances_enabled = distances_new;
+}
+
 /** \name GPU Push/Pop State
  * \{ */