OpenSubdiv: Properly respect Subdivide UVs option

intern/opensubdiv/opensubdiv_converter.cc

@@ -567,9 +567,12 @@ struct OpenSubdiv_TopologyRefinerDescr *openSubdiv_createTopologyRefinerDescr(
 	Options options;
 	options.SetVtxBoundaryInterpolation(Options::VTX_BOUNDARY_EDGE_ONLY);
 	options.SetCreasingMethod(Options::CREASE_UNIFORM);
-	/* TODO(sergey): Get proper UV subdivide flag. */
+	if (converter->get_subdiv_uvs(converter)) {
-	// options.SetFVarLinearInterpolation(Options::FVAR_LINEAR_ALL);
+		options.SetFVarLinearInterpolation(Options::FVAR_LINEAR_CORNERS_ONLY);
-	options.SetFVarLinearInterpolation(Options::FVAR_LINEAR_CORNERS_ONLY);
+	}
+	else {
+		options.SetFVarLinearInterpolation(Options::FVAR_LINEAR_ALL);
+	}
 
 	TopologyRefinerFactory<TopologyRefinerData>::Options
 	        topology_options(scheme_type, options);
@@ -649,6 +652,7 @@ int openSubdiv_topologyRefnerCompareConverter(
         const OpenSubdiv_TopologyRefinerDescr *topology_refiner,
         OpenSubdiv_Converter *converter)
 {
+	typedef OpenSubdiv::Sdc::Options Options;
 	using OpenSubdiv::Far::ConstIndexArray;
 	using OpenSubdiv::Far::TopologyRefiner;
 	using OpenSubdiv::Far::TopologyLevel;
@@ -663,6 +667,12 @@ int openSubdiv_topologyRefnerCompareConverter(
 	if (scheme_type != refiner->GetSchemeType()) {
 		return false;
 	}
+	const Options options = refiner->GetSchemeOptions();
+	Options::FVarLinearInterpolation interp = options.GetFVarLinearInterpolation();
+	const bool subdiv_uvs = (interp != Options::FVAR_LINEAR_ALL);
+	if (converter->get_subdiv_uvs(converter) != subdiv_uvs) {
+		return false;
+	}
 	if (converter->get_num_verts(converter) != num_verts ||
 	    converter->get_num_edges(converter) != num_edges ||
 	    converter->get_num_faces(converter) != num_faces)

intern/opensubdiv/opensubdiv_converter_capi.h

@@ -47,6 +47,8 @@ typedef struct OpenSubdiv_Converter {
 
 	OpenSubdiv_SchemeType (*get_type)(const OpenSubdiv_Converter *converter);
 
+	bool (*get_subdiv_uvs)(const OpenSubdiv_Converter *converter);
+
 	int (*get_num_faces)(const OpenSubdiv_Converter *converter);
 	int (*get_num_edges)(const OpenSubdiv_Converter *converter);
 	int (*get_num_verts)(const OpenSubdiv_Converter *converter);

source/blender/blenkernel/intern/CCGSubSurf.c

@@ -316,6 +316,7 @@ CCGSubSurf *ccgSubSurf_new(CCGMeshIFC *ifc, int subdivLevels, CCGAllocatorIFC *a
 		ss->osd_next_face_ptex_index = 0;
 		ss->osd_coarse_coords = NULL;
 		ss->osd_num_coarse_coords = 0;
+		ss->osd_subdiv_uvs = false;
 #endif
 
 		return ss;

source/blender/blenkernel/intern/CCGSubSurf.h

@@ -244,6 +244,8 @@ void ccgSubSurf_free_osd_mesh(CCGSubSurf *ss);
 
 void ccgSubSurf_getMinMax(CCGSubSurf *ss, float r_min[3], float r_max[3]);
 
+void ccgSubSurf__sync_subdivUvs(CCGSubSurf *ss, bool subsurf_uvs);
+
 #endif
 
 #endif  /* __CCGSUBSURF_H__ */

source/blender/blenkernel/intern/CCGSubSurf_intern.h

@@ -254,6 +254,8 @@ struct CCGSubSurf {
 	 * to fill in PTex index of CCGFace.
 	 */
 	int osd_next_face_ptex_index;
+
+	bool osd_subdiv_uvs;
 #endif
 };
 

source/blender/blenkernel/intern/CCGSubSurf_opensubdiv.c

@@ -984,6 +984,11 @@ void ccgSubSurf__delete_pending(void)
 	BLI_spin_unlock(&delete_spin);
 }
 
+void ccgSubSurf__sync_subdivUvs(CCGSubSurf *ss, bool subdiv_uvs)
+{
+    ss->osd_subdiv_uvs = subdiv_uvs;
+}
+
 /* ** Public API ** */
 
 void BKE_subsurf_osd_init(void)

source/blender/blenkernel/intern/CCGSubSurf_opensubdiv_converter.c

@@ -84,6 +84,13 @@ static OpenSubdiv_SchemeType conv_dm_get_type(
 		return OSD_SCHEME_CATMARK;
 }
 
+static bool conv_dm_get_subdiv_uvs(
+        const OpenSubdiv_Converter *converter)
+{
+	ConvDMStorage *storage = converter->user_data;
+	return (storage->ss->osd_subdiv_uvs);
+}
+
 static int conv_dm_get_num_faces(const OpenSubdiv_Converter *converter)
 {
 	ConvDMStorage *storage = converter->user_data;
@@ -424,6 +431,8 @@ void ccgSubSurf_converter_setup_from_derivedmesh(
 
 	converter->get_type = conv_dm_get_type;
 
+	converter->get_subdiv_uvs = conv_dm_get_subdiv_uvs;
+
 	converter->get_num_faces = conv_dm_get_num_faces;
 	converter->get_num_edges = conv_dm_get_num_edges;
 	converter->get_num_verts = conv_dm_get_num_verts;
@@ -517,6 +526,13 @@ static OpenSubdiv_SchemeType conv_ccg_get_bilinear_type(
 	}
 }
 
+static bool conv_ccg_get_subdiv_uvs(
+        const OpenSubdiv_Converter *converter)
+{
+	CCGSubSurf *ss = converter->user_data;
+	return (ss->osd_subdiv_uvs);
+}
+
 static int conv_ccg_get_num_faces(const OpenSubdiv_Converter *converter)
 {
 	CCGSubSurf *ss = converter->user_data;
@@ -696,6 +712,8 @@ void ccgSubSurf_converter_setup_from_ccg(CCGSubSurf *ss,
 {
 	converter->get_type = conv_ccg_get_bilinear_type;
 
+	converter->get_subdiv_uvs = conv_ccg_get_subdiv_uvs;
+
 	converter->get_num_faces = conv_ccg_get_num_faces;
 	converter->get_num_edges = conv_ccg_get_num_edges;
 	converter->get_num_verts = conv_ccg_get_num_verts;

source/blender/blenkernel/intern/subsurf_ccg.c

@@ -794,7 +794,8 @@ static void ss_sync_osd_from_derivedmesh(CCGSubSurf *ss,
 static void ss_sync_from_derivedmesh(CCGSubSurf *ss,
                                      DerivedMesh *dm,
                                      float (*vertexCos)[3],
-                                     int use_flat_subdiv)
+                                     int use_flat_subdiv,
+                                     bool use_subdiv_uvs)
 {
 #ifdef WITH_OPENSUBDIV
 	/* Reset all related descriptors if actual mesh topology changed or if
@@ -802,6 +803,7 @@ static void ss_sync_from_derivedmesh(CCGSubSurf *ss,
 	 */
 	if (!ccgSubSurf_needGrids(ss)) {
 		/* TODO(sergey): Use vertex coordinates and flat subdiv flag. */
+		ccgSubSurf__sync_subdivUvs(ss, use_subdiv_uvs);
 		ccgSubSurf_checkTopologyChanged(ss, dm);
 		ss_sync_osd_from_derivedmesh(ss, dm);
 	}
@@ -5029,7 +5031,7 @@ struct DerivedMesh *subsurf_make_derived_from_derived(
 #ifdef WITH_OPENSUBDIV
 		ccgSubSurf_setSkipGrids(smd->emCache, use_gpu_backend);
 #endif
-		ss_sync_from_derivedmesh(smd->emCache, dm, vertCos, useSimple);
+		ss_sync_from_derivedmesh(smd->emCache, dm, vertCos, useSimple, useSubsurfUv);
 		result = getCCGDerivedMesh(smd->emCache,
 		                           drawInteriorEdges,
 		                           useSubsurfUv, dm, use_gpu_backend);
@@ -5044,7 +5046,7 @@ struct DerivedMesh *subsurf_make_derived_from_derived(
 		
 		ss = _getSubSurf(NULL, levels, 3, useSimple | CCG_USE_ARENA | CCG_CALC_NORMALS);
 
-		ss_sync_from_derivedmesh(ss, dm, vertCos, useSimple);
+		ss_sync_from_derivedmesh(ss, dm, vertCos, useSimple, useSubsurfUv);
 
 		result = getCCGDerivedMesh(ss,
 		                           drawInteriorEdges, useSubsurfUv, dm, false);
@@ -5075,7 +5077,7 @@ struct DerivedMesh *subsurf_make_derived_from_derived(
 		if (useIncremental && (flags & SUBSURF_IS_FINAL_CALC)) {
 			smd->mCache = ss = _getSubSurf(smd->mCache, levels, 3, useSimple | useAging | CCG_CALC_NORMALS);
 
-			ss_sync_from_derivedmesh(ss, dm, vertCos, useSimple);
+			ss_sync_from_derivedmesh(ss, dm, vertCos, useSimple, useSubsurfUv);
 
 			result = getCCGDerivedMesh(smd->mCache,
 			                           drawInteriorEdges,
@@ -5115,7 +5117,7 @@ struct DerivedMesh *subsurf_make_derived_from_derived(
 #ifdef WITH_OPENSUBDIV
 			ccgSubSurf_setSkipGrids(ss, use_gpu_backend);
 #endif
-			ss_sync_from_derivedmesh(ss, dm, vertCos, useSimple);
+			ss_sync_from_derivedmesh(ss, dm, vertCos, useSimple, useSubsurfUv);
 
 			result = getCCGDerivedMesh(ss, drawInteriorEdges, useSubsurfUv, dm, use_gpu_backend);
 
@@ -5144,7 +5146,7 @@ void subsurf_calculate_limit_positions(Mesh *me, float (*r_positions)[3])
 	CCGVertIterator vi;
 	DerivedMesh *dm = CDDM_from_mesh(me);
 
-	ss_sync_from_derivedmesh(ss, dm, NULL, 0);
+	ss_sync_from_derivedmesh(ss, dm, NULL, 0, 0);
 
 	for (ccgSubSurf_initVertIterator(ss, &vi); !ccgVertIterator_isStopped(&vi); ccgVertIterator_next(&vi)) {
 		CCGVert *v = ccgVertIterator_getCurrent(&vi);