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/*
* 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) 2021 by Blender Foundation.
* All rights reserved.
*/
/** \file
* \ingroup draw
*/
#include "BLI_vector.hh"
#include "MEM_guardedalloc.h"
#include "extract_mesh.h"
namespace blender::draw {
/* ---------------------------------------------------------------------- */
/** \name Extract Point Indices
* \{ */
static void extract_points_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->vert_len, mr->loop_len + mr->loop_loose_len);
}
BLI_INLINE void vert_set_bm(GPUIndexBufBuilder *elb, const BMVert *eve, int l_index)
{
const int v_index = BM_elem_index_get(eve);
if (!BM_elem_flag_test(eve, BM_ELEM_HIDDEN)) {
GPU_indexbuf_set_point_vert(elb, v_index, l_index);
}
else {
GPU_indexbuf_set_point_restart(elb, v_index);
}
}
BLI_INLINE void vert_set_mesh(GPUIndexBufBuilder *elb,
const MeshRenderData *mr,
const int v_index,
const int l_index)
{
const MVert *mv = &mr->mvert[v_index];
if (!((mr->use_hide && (mv->flag & ME_HIDE)) ||
((mr->extract_type == MR_EXTRACT_MAPPED) && (mr->v_origindex) &&
(mr->v_origindex[v_index] == ORIGINDEX_NONE)))) {
GPU_indexbuf_set_point_vert(elb, v_index, l_index);
}
else {
GPU_indexbuf_set_point_restart(elb, v_index);
}
}
static void extract_points_iter_poly_bm(const MeshRenderData *UNUSED(mr),
const BMFace *f,
const int UNUSED(f_index),
void *_userdata)
{
GPUIndexBufBuilder *elb = static_cast<GPUIndexBufBuilder *>(_userdata);
BMLoop *l_iter, *l_first;
l_iter = l_first = BM_FACE_FIRST_LOOP(f);
do {
const int l_index = BM_elem_index_get(l_iter);
vert_set_bm(elb, l_iter->v, l_index);
} while ((l_iter = l_iter->next) != l_first);
}
static void extract_points_iter_poly_mesh(const MeshRenderData *mr,
const MPoly *mp,
const int UNUSED(mp_index),
void *_userdata)
{
GPUIndexBufBuilder *elb = static_cast<GPUIndexBufBuilder *>(_userdata);
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];
vert_set_mesh(elb, mr, ml->v, ml_index);
}
}
static void extract_points_iter_ledge_bm(const MeshRenderData *mr,
const BMEdge *eed,
const int ledge_index,
void *_userdata)
{
GPUIndexBufBuilder *elb = static_cast<GPUIndexBufBuilder *>(_userdata);
vert_set_bm(elb, eed->v1, mr->loop_len + (ledge_index * 2));
vert_set_bm(elb, eed->v2, mr->loop_len + (ledge_index * 2) + 1);
}
static void extract_points_iter_ledge_mesh(const MeshRenderData *mr,
const MEdge *med,
const int ledge_index,
void *_userdata)
{
GPUIndexBufBuilder *elb = static_cast<GPUIndexBufBuilder *>(_userdata);
vert_set_mesh(elb, mr, med->v1, mr->loop_len + (ledge_index * 2));
vert_set_mesh(elb, mr, med->v2, mr->loop_len + (ledge_index * 2) + 1);
}
static void extract_points_iter_lvert_bm(const MeshRenderData *mr,
const BMVert *eve,
const int lvert_index,
void *_userdata)
{
GPUIndexBufBuilder *elb = static_cast<GPUIndexBufBuilder *>(_userdata);
const int offset = mr->loop_len + (mr->edge_loose_len * 2);
vert_set_bm(elb, eve, offset + lvert_index);
}
static void extract_points_iter_lvert_mesh(const MeshRenderData *mr,
const MVert *UNUSED(mv),
const int lvert_index,
void *_userdata)
{
GPUIndexBufBuilder *elb = static_cast<GPUIndexBufBuilder *>(_userdata);
const int offset = mr->loop_len + (mr->edge_loose_len * 2);
vert_set_mesh(elb, mr, mr->lverts[lvert_index], offset + lvert_index);
}
static void extract_points_task_reduce(void *_userdata_to, void *_userdata_from)
{
GPUIndexBufBuilder *elb_to = static_cast<GPUIndexBufBuilder *>(_userdata_to);
GPUIndexBufBuilder *elb_from = static_cast<GPUIndexBufBuilder *>(_userdata_from);
GPU_indexbuf_join(elb_to, elb_from);
}
static void extract_points_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_points()
{
MeshExtract extractor = {nullptr};
extractor.init = extract_points_init;
extractor.iter_poly_bm = extract_points_iter_poly_bm;
extractor.iter_poly_mesh = extract_points_iter_poly_mesh;
extractor.iter_ledge_bm = extract_points_iter_ledge_bm;
extractor.iter_ledge_mesh = extract_points_iter_ledge_mesh;
extractor.iter_lvert_bm = extract_points_iter_lvert_bm;
extractor.iter_lvert_mesh = extract_points_iter_lvert_mesh;
extractor.task_reduce = extract_points_task_reduce;
extractor.finish = extract_points_finish;
extractor.use_threading = true;
extractor.data_type = MR_DATA_NONE;
extractor.data_size = sizeof(GPUIndexBufBuilder);
extractor.mesh_buffer_offset = offsetof(MeshBufferCache, ibo.points);
return extractor;
}
} // namespace blender::draw
extern "C" {
const MeshExtract extract_points = blender::draw::create_extractor_points();
}
/** \} */
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