OpenSubdiv: remove legacy support & display queries

OSD display needs more work, since it uses some legacy OpenGL light and material functions.

6 files changed, 7 insertions, 36 deletions

diff --git a/intern/opensubdiv/opensubdiv_capi.cc b/intern/opensubdiv/opensubdiv_capi.cc
index 52ce98fe74b..8337bcb0ce5 100644
--- a/intern/opensubdiv/opensubdiv_capi.cc
+++ b/intern/opensubdiv/opensubdiv_capi.cc
@@ -368,16 +368,3 @@ const struct OpenSubdiv_TopologyRefinerDescr *openSubdiv_getGLMeshTopologyRefine
 {
 	return gl_mesh->topology_refiner;
 }
-
-int openSubdiv_supportGPUDisplay(void)
-{
-	// TODO: simplify extension check once Blender adopts GL 3.2
-	return openSubdiv_gpu_legacy_support() &&
-	       (GLEW_VERSION_3_2 ||
-	       (GLEW_VERSION_3_1 && GLEW_EXT_geometry_shader4) ||
-	       (GLEW_VERSION_3_0 &&
-	        GLEW_EXT_geometry_shader4 &&
-	        GLEW_ARB_uniform_buffer_object &&
-	        (GLEW_ARB_texture_buffer_object || GLEW_EXT_texture_buffer_object)));
-	/* also ARB_explicit_attrib_location? */
-}
diff --git a/intern/opensubdiv/opensubdiv_capi.h b/intern/opensubdiv/opensubdiv_capi.h
index c3a194813e6..3fdfefd525f 100644
--- a/intern/opensubdiv/opensubdiv_capi.h
+++ b/intern/opensubdiv/opensubdiv_capi.h
@@ -146,11 +146,9 @@ void openSubdiv_osdGLAllocFVar(struct OpenSubdiv_TopologyRefinerDescr *topology_
 void openSubdiv_osdGLDestroyFVar(OpenSubdiv_GLMesh *gl_mesh);
 
 /* ** Utility functions ** */
-int openSubdiv_supportGPUDisplay(void);
 int openSubdiv_getAvailableEvaluators(void);
-void openSubdiv_init(bool gpu_legacy_support);
+void openSubdiv_init(void);
 void openSubdiv_cleanup(void);
-bool openSubdiv_gpu_legacy_support(void);
 
 #ifdef __cplusplus
 }
diff --git a/intern/opensubdiv/opensubdiv_gpu_capi.cc b/intern/opensubdiv/opensubdiv_gpu_capi.cc
index 00592f2e87e..d6b30b9bfe3 100644
--- a/intern/opensubdiv/opensubdiv_gpu_capi.cc
+++ b/intern/opensubdiv/opensubdiv_gpu_capi.cc
@@ -423,11 +423,10 @@ bool openSubdiv_osdGLDisplayInit(void)
 {
 	static bool need_init = true;
 	static bool init_success = false;
-	if (need_init) {
 
-		if (!openSubdiv_supportGPUDisplay()) {
-			return false;
-		}
+	if (need_init) {
+		/* TODO: update OSD drawing to OpenGL 3.3 core, then remove following line */
+		return false;
 
 		const char *version = "";
 		if (GLEW_VERSION_3_2) {
diff --git a/intern/opensubdiv/opensubdiv_utils_capi.cc b/intern/opensubdiv/opensubdiv_utils_capi.cc
index ae5592367dd..72e3751e6b3 100644
--- a/intern/opensubdiv/opensubdiv_utils_capi.cc
+++ b/intern/opensubdiv/opensubdiv_utils_capi.cc
@@ -41,14 +41,8 @@
 #  include "opensubdiv_device_context_cuda.h"
 #endif  /* OPENSUBDIV_HAS_CUDA */
 
-static bool gpu_legacy_support_global = false;
-
 int openSubdiv_getAvailableEvaluators(void)
 {
-	if (!openSubdiv_supportGPUDisplay()) {
-		return 0;
-	}
-
 	int flags = OPENSUBDIV_EVALUATOR_CPU;
 
 #ifdef OPENSUBDIV_HAS_OPENMP
@@ -82,19 +76,13 @@ int openSubdiv_getAvailableEvaluators(void)
 	return flags;
 }
 
-void openSubdiv_init(bool gpu_legacy_support)
+void openSubdiv_init(void)
 {
 	/* Ensure all OpenGL strings are cached. */
 	(void)openSubdiv_getAvailableEvaluators();
-	gpu_legacy_support_global = gpu_legacy_support;
 }
 
 void openSubdiv_cleanup(void)
 {
 	openSubdiv_osdGLDisplayDeinit();
 }
-
-bool openSubdiv_gpu_legacy_support(void)
-{
-	return gpu_legacy_support_global;
-}
diff --git a/source/blender/blenkernel/intern/CCGSubSurf_opensubdiv.c b/source/blender/blenkernel/intern/CCGSubSurf_opensubdiv.c
index ab89a920089..9c86a22a1f8 100644
--- a/source/blender/blenkernel/intern/CCGSubSurf_opensubdiv.c
+++ b/source/blender/blenkernel/intern/CCGSubSurf_opensubdiv.c
@@ -993,7 +993,7 @@ void ccgSubSurf__sync_subdivUvs(CCGSubSurf *ss, bool subdiv_uvs)
 
 void BKE_subsurf_osd_init(void)
 {
-	openSubdiv_init(false);
+	openSubdiv_init();
 	BLI_spin_init(&delete_spin);
 }
 
diff --git a/source/blender/blenkernel/intern/subsurf_ccg.c b/source/blender/blenkernel/intern/subsurf_ccg.c
index 35887c12d62..da7bbb55b00 100644
--- a/source/blender/blenkernel/intern/subsurf_ccg.c
+++ b/source/blender/blenkernel/intern/subsurf_ccg.c
@@ -5014,8 +5014,7 @@ static bool subsurf_use_gpu_backend(SubsurfFlags flags)
 	 */
 	return
 	        (flags & SUBSURF_USE_GPU_BACKEND) != 0 &&
-	        (U.opensubdiv_compute_type != USER_OPENSUBDIV_COMPUTE_NONE) &&
-	        (openSubdiv_supportGPUDisplay());
+	        (U.opensubdiv_compute_type != USER_OPENSUBDIV_COMPUTE_NONE);
 #else
 	(void)flags;
 	return false;