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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2018 Blender Foundation. All rights reserved. */
/** \file
* \ingroup bke
*/
#include "BKE_mesh.h"
#include "BKE_subdiv_ccg.h"
#include "MEM_guardedalloc.h"
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
typedef struct CCGMaterialFromMeshData {
const Mesh *mesh;
const MPoly *polys;
const int *material_indices;
} CCGMaterialFromMeshData;
static DMFlagMat subdiv_ccg_material_flags_eval(
SubdivCCGMaterialFlagsEvaluator *material_flags_evaluator, const int coarse_face_index)
{
CCGMaterialFromMeshData *data = (CCGMaterialFromMeshData *)material_flags_evaluator->user_data;
BLI_assert(coarse_face_index < data->mesh->totpoly);
const MPoly *poly = &data->polys[coarse_face_index];
DMFlagMat material_flags;
material_flags.flag = poly->flag;
material_flags.mat_nr = data->material_indices ? data->material_indices[coarse_face_index] : 0;
return material_flags;
}
static void subdiv_ccg_material_flags_free(
SubdivCCGMaterialFlagsEvaluator *material_flags_evaluator)
{
MEM_freeN(material_flags_evaluator->user_data);
}
void BKE_subdiv_ccg_material_flags_init_from_mesh(
SubdivCCGMaterialFlagsEvaluator *material_flags_evaluator, const Mesh *mesh)
{
CCGMaterialFromMeshData *data = MEM_mallocN(sizeof(CCGMaterialFromMeshData),
"ccg material eval");
data->mesh = mesh;
data->material_indices = (const int *)CustomData_get_layer_named(
&mesh->pdata, CD_PROP_INT32, "material_index");
data->polys = BKE_mesh_polys(mesh);
material_flags_evaluator->eval_material_flags = subdiv_ccg_material_flags_eval;
material_flags_evaluator->free = subdiv_ccg_material_flags_free;
material_flags_evaluator->user_data = data;
}
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