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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 "draw_cache_impl.h"
namespace blender::draw {
/* ---------------------------------------------------------------------- */
/** \name Extract Edit UV Data / Flags
* \{ */
struct MeshExtract_EditUVData_Data {
EditLoopData *vbo_data;
int cd_ofs;
};
static void extract_edituv_data_init(const MeshRenderData *mr,
struct MeshBatchCache *UNUSED(cache),
void *buf,
void *tls_data)
{
GPUVertBuf *vbo = static_cast<GPUVertBuf *>(buf);
static GPUVertFormat format = {0};
if (format.attr_len == 0) {
/* WARNING: Adjust #EditLoopData struct accordingly. */
GPU_vertformat_attr_add(&format, "data", GPU_COMP_U8, 4, GPU_FETCH_INT);
GPU_vertformat_alias_add(&format, "flag");
}
GPU_vertbuf_init_with_format(vbo, &format);
GPU_vertbuf_data_alloc(vbo, mr->loop_len);
CustomData *cd_ldata = (mr->extract_type == MR_EXTRACT_BMESH) ? &mr->bm->ldata : &mr->me->ldata;
MeshExtract_EditUVData_Data *data = static_cast<MeshExtract_EditUVData_Data *>(tls_data);
data->vbo_data = (EditLoopData *)GPU_vertbuf_get_data(vbo);
data->cd_ofs = CustomData_get_offset(cd_ldata, CD_MLOOPUV);
}
static void extract_edituv_data_iter_poly_bm(const MeshRenderData *mr,
const BMFace *f,
const int UNUSED(f_index),
void *_data)
{
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);
MeshExtract_EditUVData_Data *data = static_cast<MeshExtract_EditUVData_Data *>(_data);
EditLoopData *eldata = &data->vbo_data[l_index];
memset(eldata, 0x0, sizeof(*eldata));
mesh_render_data_loop_flag(mr, l_iter, data->cd_ofs, eldata);
mesh_render_data_face_flag(mr, f, data->cd_ofs, eldata);
mesh_render_data_loop_edge_flag(mr, l_iter, data->cd_ofs, eldata);
} while ((l_iter = l_iter->next) != l_first);
}
static void extract_edituv_data_iter_poly_mesh(const MeshRenderData *mr,
const MPoly *mp,
const int mp_index,
void *_data)
{
MeshExtract_EditUVData_Data *data = static_cast<MeshExtract_EditUVData_Data *>(_data);
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];
EditLoopData *eldata = &data->vbo_data[ml_index];
memset(eldata, 0x0, sizeof(*eldata));
BMFace *efa = bm_original_face_get(mr, mp_index);
if (efa) {
BMEdge *eed = bm_original_edge_get(mr, ml->e);
BMVert *eve = bm_original_vert_get(mr, ml->v);
if (eed && eve) {
/* Loop on an edge endpoint. */
BMLoop *l = BM_face_edge_share_loop(efa, eed);
mesh_render_data_loop_flag(mr, l, data->cd_ofs, eldata);
mesh_render_data_loop_edge_flag(mr, l, data->cd_ofs, eldata);
}
else {
if (eed == nullptr) {
/* Find if the loop's vert is not part of an edit edge.
* For this, we check if the previous loop was on an edge. */
const int ml_index_last = mp->loopstart + mp->totloop - 1;
const int l_prev = (ml_index == mp->loopstart) ? ml_index_last : (ml_index - 1);
const MLoop *ml_prev = &mr->mloop[l_prev];
eed = bm_original_edge_get(mr, ml_prev->e);
}
if (eed) {
/* Mapped points on an edge between two edit verts. */
BMLoop *l = BM_face_edge_share_loop(efa, eed);
mesh_render_data_loop_edge_flag(mr, l, data->cd_ofs, eldata);
}
}
}
}
}
constexpr MeshExtract create_extractor_edituv_data()
{
MeshExtract extractor = {nullptr};
extractor.init = extract_edituv_data_init;
extractor.iter_poly_bm = extract_edituv_data_iter_poly_bm;
extractor.iter_poly_mesh = extract_edituv_data_iter_poly_mesh;
extractor.data_type = MR_DATA_NONE;
extractor.data_size = sizeof(MeshExtract_EditUVData_Data);
extractor.use_threading = true;
extractor.mesh_buffer_offset = offsetof(MeshBufferCache, vbo.edituv_data);
return extractor;
}
/** \} */
} // namespace blender::draw
extern "C" {
const MeshExtract extract_edituv_data = blender::draw::create_extractor_edituv_data();
}
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