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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2021 Blender Foundation. All rights reserved. */
/** \file
* \ingroup draw
*/
#include "BLI_bitmap.h"
#include "extract_mesh.hh"
namespace blender::draw {
/* ---------------------------------------------------------------------- */
/** \name Extract Face-dots Indices
* \{ */
static void extract_fdots_init(const MeshRenderData *mr,
struct MeshBatchCache *UNUSED(cache),
void *UNUSED(buf),
void *tls_data)
{
GPUIndexBufBuilder *elb = static_cast<GPUIndexBufBuilder *>(tls_data);
GPU_indexbuf_init(elb, GPU_PRIM_POINTS, mr->poly_len, mr->poly_len);
}
static void extract_fdots_iter_poly_bm(const MeshRenderData *UNUSED(mr),
const BMFace *f,
const int f_index,
void *_userdata)
{
GPUIndexBufBuilder *elb = static_cast<GPUIndexBufBuilder *>(_userdata);
if (!BM_elem_flag_test(f, BM_ELEM_HIDDEN)) {
GPU_indexbuf_set_point_vert(elb, f_index, f_index);
}
else {
GPU_indexbuf_set_point_restart(elb, f_index);
}
}
static void extract_fdots_iter_poly_mesh(const MeshRenderData *mr,
const MPoly *mp,
const int mp_index,
void *_userdata)
{
GPUIndexBufBuilder *elb = static_cast<GPUIndexBufBuilder *>(_userdata);
if (mr->use_subsurf_fdots) {
const BLI_bitmap *facedot_tags = mr->me->runtime.subsurf_face_dot_tags;
const MLoop *mloop = mr->mloop;
const int ml_index_end = mp->loopstart + mp->totloop;
for (int ml_index = mp->loopstart; ml_index < ml_index_end; ml_index += 1) {
const MLoop *ml = &mloop[ml_index];
if (BLI_BITMAP_TEST(facedot_tags, ml->v) && !(mr->use_hide && (mp->flag & ME_HIDE))) {
GPU_indexbuf_set_point_vert(elb, mp_index, mp_index);
return;
}
}
GPU_indexbuf_set_point_restart(elb, mp_index);
}
else {
if (!(mr->use_hide && (mp->flag & ME_HIDE))) {
GPU_indexbuf_set_point_vert(elb, mp_index, mp_index);
}
else {
GPU_indexbuf_set_point_restart(elb, mp_index);
}
}
}
static void extract_fdots_finish(const MeshRenderData *UNUSED(mr),
struct MeshBatchCache *UNUSED(cache),
void *buf,
void *_userdata)
{
GPUIndexBufBuilder *elb = static_cast<GPUIndexBufBuilder *>(_userdata);
GPUIndexBuf *ibo = static_cast<GPUIndexBuf *>(buf);
GPU_indexbuf_build_in_place(elb, ibo);
}
constexpr MeshExtract create_extractor_fdots()
{
MeshExtract extractor = {nullptr};
extractor.init = extract_fdots_init;
extractor.iter_poly_bm = extract_fdots_iter_poly_bm;
extractor.iter_poly_mesh = extract_fdots_iter_poly_mesh;
extractor.finish = extract_fdots_finish;
extractor.data_type = MR_DATA_NONE;
extractor.data_size = sizeof(GPUIndexBufBuilder);
extractor.use_threading = false;
extractor.mesh_buffer_offset = offsetof(MeshBufferList, ibo.fdots);
return extractor;
}
/** \} */
} // namespace blender::draw
const MeshExtract extract_fdots = blender::draw::create_extractor_fdots();
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