OpenSubdiv: Use pool for delayed OpenGL buffers free when freeing from non-main thread

This is really similar to what GPU module was already doing. There are number of
possible improvements still:

- Re-use allocated VAOs when requesting new ones instead of going to the trouble
  of freeing VAO and then re-creating it again.

- Move VAO handling to GPU module.

Fixes T46589: OpenSubdiv crash with drivers

1 files changed, 2 insertions, 3 deletions

diff --git a/source/blender/blenkernel/intern/CCGSubSurf.c b/source/blender/blenkernel/intern/CCGSubSurf.c
index 95ddb9d5498..828a6bb16ac 100644
--- a/source/blender/blenkernel/intern/CCGSubSurf.c
+++ b/source/blender/blenkernel/intern/CCGSubSurf.c
@@ -334,11 +334,10 @@ void ccgSubSurf_free(CCGSubSurf *ss)
 		openSubdiv_deleteEvaluatorDescr(ss->osd_evaluator);
 	}
 	if (ss->osd_mesh != NULL) {
-		/* TODO(sergey): Make sure free happens form the main thread! */
-		openSubdiv_deleteOsdGLMesh(ss->osd_mesh);
+		ccgSubSurf__delete_osdGLMesh(ss->osd_mesh);
 	}
 	if (ss->osd_vao != 0) {
-		glDeleteVertexArrays(1, &ss->osd_vao);
+		ccgSubSurf__delete_vertex_array(ss->osd_vao);
 	}
 	if (ss->osd_coarse_coords != NULL) {
 		MEM_freeN(ss->osd_coarse_coords);