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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 "draw_cache_extract_mesh_private.h"
#include "MEM_guardedalloc.h"
namespace blender::draw {
static void extract_tris_mat_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);
}
/* ---------------------------------------------------------------------- */
/** \name Extract Triangles Indices (multi material)
* \{ */
static void extract_tris_init(const MeshRenderData *mr,
struct MeshBatchCache *UNUSED(cache),
void *UNUSED(ibo),
void *tls_data)
{
GPUIndexBufBuilder *elb = static_cast<GPUIndexBufBuilder *>(tls_data);
GPU_indexbuf_init(elb, GPU_PRIM_TRIS, mr->poly_sorted.visible_tri_len, mr->loop_len);
}
static void extract_tris_iter_poly_bm(const MeshRenderData *mr,
const BMFace *f,
const int f_index,
void *_data)
{
int tri_first_index = mr->poly_sorted.tri_first_index[f_index];
if (tri_first_index == -1) {
return;
}
GPUIndexBufBuilder *elb = static_cast<GPUIndexBufBuilder *>(_data);
int tri_first_index_real = poly_to_tri_count(f_index, BM_elem_index_get(f->l_first));
struct BMLoop *(*looptris)[3] = mr->edit_bmesh->looptris;
int tri_len = f->len - 2;
for (int offs = 0; offs < tri_len; offs++) {
BMLoop **elt = looptris[tri_first_index_real + offs];
int tri_index = tri_first_index + offs;
GPU_indexbuf_set_tri_verts(elb,
tri_index,
BM_elem_index_get(elt[0]),
BM_elem_index_get(elt[1]),
BM_elem_index_get(elt[2]));
}
}
static void extract_tris_iter_poly_mesh(const MeshRenderData *mr,
const MPoly *mp,
const int mp_index,
void *_data)
{
int tri_first_index = mr->poly_sorted.tri_first_index[mp_index];
if (tri_first_index == -1) {
return;
}
GPUIndexBufBuilder *elb = static_cast<GPUIndexBufBuilder *>(_data);
int tri_first_index_real = poly_to_tri_count(mp_index, mp->loopstart);
int tri_len = mp->totloop - 2;
for (int offs = 0; offs < tri_len; offs++) {
const MLoopTri *mlt = &mr->mlooptri[tri_first_index_real + offs];
int tri_index = tri_first_index + offs;
GPU_indexbuf_set_tri_verts(elb, tri_index, mlt->tri[0], mlt->tri[1], mlt->tri[2]);
}
}
static void extract_tris_finish(const MeshRenderData *mr,
struct MeshBatchCache *cache,
void *buf,
void *_data)
{
GPUIndexBuf *ibo = static_cast<GPUIndexBuf *>(buf);
GPUIndexBufBuilder *elb = static_cast<GPUIndexBufBuilder *>(_data);
GPU_indexbuf_build_in_place(elb, ibo);
/* Create ibo sub-ranges. Always do this to avoid error when the standard surface batch
* is created before the surfaces-per-material. */
if (mr->use_final_mesh && cache->final.tris_per_mat) {
MeshBufferCache *mbc_final = &cache->final;
int mat_start = 0;
for (int i = 0; i < mr->mat_len; i++) {
/* These IBOs have not been queried yet but we create them just in case they are needed
* later since they are not tracked by mesh_buffer_cache_create_requested(). */
if (mbc_final->tris_per_mat[i] == nullptr) {
mbc_final->tris_per_mat[i] = GPU_indexbuf_calloc();
}
const int mat_tri_len = mr->poly_sorted.mat_tri_len[i];
/* Multiply by 3 because these are triangle indices. */
const int start = mat_start * 3;
const int len = mat_tri_len * 3;
GPU_indexbuf_create_subrange_in_place(mbc_final->tris_per_mat[i], ibo, start, len);
mat_start += mat_tri_len;
}
}
}
constexpr MeshExtract create_extractor_tris()
{
MeshExtract extractor = {nullptr};
extractor.init = extract_tris_init;
extractor.iter_poly_bm = extract_tris_iter_poly_bm;
extractor.iter_poly_mesh = extract_tris_iter_poly_mesh;
extractor.task_reduce = extract_tris_mat_task_reduce;
extractor.finish = extract_tris_finish;
extractor.data_type = MR_DATA_LOOPTRI | MR_DATA_POLYS_SORTED;
extractor.data_size = sizeof(GPUIndexBufBuilder);
extractor.use_threading = true;
extractor.mesh_buffer_offset = offsetof(MeshBufferCache, ibo.tris);
return extractor;
}
/** \} */
/** \name Extract Triangles Indices (single material)
* \{ */
static void extract_tris_single_mat_init(const MeshRenderData *mr,
struct MeshBatchCache *UNUSED(cache),
void *UNUSED(ibo),
void *tls_data)
{
GPUIndexBufBuilder *elb = static_cast<GPUIndexBufBuilder *>(tls_data);
GPU_indexbuf_init(elb, GPU_PRIM_TRIS, mr->tri_len, mr->loop_len);
}
static void extract_tris_single_mat_iter_looptri_bm(const MeshRenderData *UNUSED(mr),
BMLoop **elt,
const int elt_index,
void *_data)
{
GPUIndexBufBuilder *elb = static_cast<GPUIndexBufBuilder *>(_data);
if (!BM_elem_flag_test(elt[0]->f, BM_ELEM_HIDDEN)) {
GPU_indexbuf_set_tri_verts(elb,
elt_index,
BM_elem_index_get(elt[0]),
BM_elem_index_get(elt[1]),
BM_elem_index_get(elt[2]));
}
else {
GPU_indexbuf_set_tri_restart(elb, elt_index);
}
}
static void extract_tris_single_mat_iter_looptri_mesh(const MeshRenderData *mr,
const MLoopTri *mlt,
const int mlt_index,
void *_data)
{
GPUIndexBufBuilder *elb = static_cast<GPUIndexBufBuilder *>(_data);
const MPoly *mp = &mr->mpoly[mlt->poly];
if (!(mr->use_hide && (mp->flag & ME_HIDE))) {
GPU_indexbuf_set_tri_verts(elb, mlt_index, mlt->tri[0], mlt->tri[1], mlt->tri[2]);
}
else {
GPU_indexbuf_set_tri_restart(elb, mlt_index);
}
}
static void extract_tris_single_mat_finish(const MeshRenderData *mr,
struct MeshBatchCache *cache,
void *buf,
void *_data)
{
GPUIndexBuf *ibo = static_cast<GPUIndexBuf *>(buf);
GPUIndexBufBuilder *elb = static_cast<GPUIndexBufBuilder *>(_data);
GPU_indexbuf_build_in_place(elb, ibo);
/* Create ibo sub-ranges. Always do this to avoid error when the standard surface batch
* is created before the surfaces-per-material. */
if (mr->use_final_mesh && cache->final.tris_per_mat) {
MeshBufferCache *mbc = &cache->final;
for (int i = 0; i < mr->mat_len; i++) {
/* These IBOs have not been queried yet but we create them just in case they are needed
* later since they are not tracked by mesh_buffer_cache_create_requested(). */
if (mbc->tris_per_mat[i] == nullptr) {
mbc->tris_per_mat[i] = GPU_indexbuf_calloc();
}
/* Multiply by 3 because these are triangle indices. */
const int len = mr->tri_len * 3;
GPU_indexbuf_create_subrange_in_place(mbc->tris_per_mat[i], ibo, 0, len);
}
}
}
constexpr MeshExtract create_extractor_tris_single_mat()
{
MeshExtract extractor = {nullptr};
extractor.init = extract_tris_single_mat_init;
extractor.iter_looptri_bm = extract_tris_single_mat_iter_looptri_bm;
extractor.iter_looptri_mesh = extract_tris_single_mat_iter_looptri_mesh;
extractor.task_reduce = extract_tris_mat_task_reduce;
extractor.finish = extract_tris_single_mat_finish;
extractor.data_type = MR_DATA_NONE;
extractor.data_size = sizeof(GPUIndexBufBuilder);
extractor.use_threading = true;
extractor.mesh_buffer_offset = offsetof(MeshBufferCache, ibo.tris);
return extractor;
}
/** \} */
} // namespace blender::draw
extern "C" {
const MeshExtract extract_tris = blender::draw::create_extractor_tris();
const MeshExtract extract_tris_single_mat = blender::draw::create_extractor_tris_single_mat();
}
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