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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2018 by Blender Foundation.
* All rights reserved.
*
* Contributor(s): Sergey Sharybin.
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/blenkernel/intern/subdiv.c
* \ingroup bke
*/
#include "BKE_subdiv.h"
#include "DNA_mesh_types.h"
#include "DNA_modifier_types.h"
#include "BLI_utildefines.h"
#include "MEM_guardedalloc.h"
#include "subdiv_converter.h"
#include "opensubdiv_capi.h"
#include "opensubdiv_converter_capi.h"
#include "opensubdiv_evaluator_capi.h"
#include "opensubdiv_topology_refiner_capi.h"
eSubdivFVarLinearInterpolation
BKE_subdiv_fvar_interpolation_from_uv_smooth(int uv_smooth)
{
switch (uv_smooth) {
case SUBSURF_UV_SMOOTH_NONE:
return SUBDIV_FVAR_LINEAR_INTERPOLATION_ALL;
case SUBSURF_UV_SMOOTH_PRESERVE_CORNERS:
return SUBDIV_FVAR_LINEAR_INTERPOLATION_CORNERS_ONLY;
case SUBSURF_UV_SMOOTH_PRESERVE_CORNERS_AND_JUNCTIONS:
return SUBDIV_FVAR_LINEAR_INTERPOLATION_CORNERS_AND_JUNCTIONS;
case SUBSURF_UV_SMOOTH_PRESERVE_CORNERS_JUNCTIONS_AND_CONCAVE:
return SUBDIV_FVAR_LINEAR_INTERPOLATION_CORNERS_JUNCTIONS_AND_CONCAVE;
case SUBSURF_UV_SMOOTH_PRESERVE_BOUNDARIES:
return SUBDIV_FVAR_LINEAR_INTERPOLATION_BOUNDARIES;
case SUBSURF_UV_SMOOTH_ALL:
return SUBDIV_FVAR_LINEAR_INTERPOLATION_NONE;
}
BLI_assert(!"Unknown uv smooth flag");
return SUBDIV_FVAR_LINEAR_INTERPOLATION_ALL;
}
Subdiv *BKE_subdiv_new_from_converter(const SubdivSettings *settings,
struct OpenSubdiv_Converter *converter)
{
SubdivStats stats;
BKE_subdiv_stats_init(&stats);
BKE_subdiv_stats_begin(&stats, SUBDIV_STATS_TOPOLOGY_REFINER_CREATION_TIME);
OpenSubdiv_TopologyRefinerSettings topology_refiner_settings;
topology_refiner_settings.level = settings->level;
topology_refiner_settings.is_adaptive = settings->is_adaptive;
struct OpenSubdiv_TopologyRefiner *osd_topology_refiner = NULL;
if (converter->getNumVertices(converter) != 0) {
osd_topology_refiner =
openSubdiv_createTopologyRefinerFromConverter(
converter, &topology_refiner_settings);
}
else {
/* TODO(sergey): Check whether original geometry had any vertices.
* The thing here is: OpenSubdiv can only deal with faces, but our
* side of subdiv also deals with loose vertices and edges.
*/
}
Subdiv *subdiv = MEM_callocN(sizeof(Subdiv), "subdiv from converetr");
subdiv->settings = *settings;
subdiv->topology_refiner = osd_topology_refiner;
subdiv->evaluator = NULL;
subdiv->displacement_evaluator = NULL;
BKE_subdiv_stats_end(&stats, SUBDIV_STATS_TOPOLOGY_REFINER_CREATION_TIME);
subdiv->stats = stats;
return subdiv;
}
Subdiv *BKE_subdiv_new_from_mesh(const SubdivSettings *settings,
struct Mesh *mesh)
{
if (mesh->totvert == 0) {
return NULL;
}
OpenSubdiv_Converter converter;
BKE_subdiv_converter_init_for_mesh(&converter, settings, mesh);
Subdiv *subdiv = BKE_subdiv_new_from_converter(settings, &converter);
BKE_subdiv_converter_free(&converter);
return subdiv;
}
void BKE_subdiv_free(Subdiv *subdiv)
{
if (subdiv->evaluator != NULL) {
openSubdiv_deleteEvaluator(subdiv->evaluator);
}
if (subdiv->topology_refiner != NULL) {
openSubdiv_deleteTopologyRefiner(subdiv->topology_refiner);
}
BKE_subdiv_displacement_detach(subdiv);
if (subdiv->cache_.face_ptex_offset != NULL) {
MEM_freeN(subdiv->cache_.face_ptex_offset);
}
MEM_freeN(subdiv);
}
int *BKE_subdiv_face_ptex_offset_get(Subdiv *subdiv)
{
if (subdiv->cache_.face_ptex_offset != NULL) {
return subdiv->cache_.face_ptex_offset;
}
OpenSubdiv_TopologyRefiner *topology_refiner = subdiv->topology_refiner;
if (topology_refiner == NULL) {
return NULL;
}
const int num_coarse_faces =
topology_refiner->getNumFaces(topology_refiner);
subdiv->cache_.face_ptex_offset = MEM_malloc_arrayN(
num_coarse_faces, sizeof(int), "subdiv face_ptex_offset");
int ptex_offset = 0;
for (int face_index = 0; face_index < num_coarse_faces; face_index++) {
const int num_ptex_faces =
topology_refiner->getNumFacePtexFaces(
topology_refiner, face_index);
subdiv->cache_.face_ptex_offset[face_index] = ptex_offset;
ptex_offset += num_ptex_faces;
}
return subdiv->cache_.face_ptex_offset;
}
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