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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2021 Blender Foundation. All rights reserved. */
/** \file
* \ingroup draw
*/
#include "extract_mesh.hh"
#include "draw_cache_impl.h"
#include "draw_subdivision.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_common(const MeshRenderData *mr,
GPUVertBuf *vbo,
MeshExtract_EditUVData_Data *data,
uint loop_len)
{
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, loop_len);
CustomData *cd_ldata = (mr->extract_type == MR_EXTRACT_BMESH) ? &mr->bm->ldata : &mr->me->ldata;
data->vbo_data = (EditLoopData *)GPU_vertbuf_get_data(vbo);
data->cd_ofs = CustomData_get_offset(cd_ldata, CD_MLOOPUV);
}
static void extract_edituv_data_init(const MeshRenderData *mr,
struct MeshBatchCache *UNUSED(cache),
void *buf,
void *tls_data)
{
GPUVertBuf *vbo = static_cast<GPUVertBuf *>(buf);
MeshExtract_EditUVData_Data *data = static_cast<MeshExtract_EditUVData_Data *>(tls_data);
extract_edituv_data_init_common(mr, vbo, data, mr->loop_len);
}
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);
}
}
}
}
}
static void extract_edituv_data_init_subdiv(const DRWSubdivCache *subdiv_cache,
const MeshRenderData *mr,
MeshBatchCache *UNUSED(cache),
void *buf,
void *tls_data)
{
GPUVertBuf *vbo = static_cast<GPUVertBuf *>(buf);
MeshExtract_EditUVData_Data *data = static_cast<MeshExtract_EditUVData_Data *>(tls_data);
extract_edituv_data_init_common(mr, vbo, data, subdiv_cache->num_subdiv_loops);
}
static void extract_edituv_data_iter_subdiv_bm(const DRWSubdivCache *subdiv_cache,
const MeshRenderData *mr,
void *_data,
uint subdiv_quad_index,
const BMFace *coarse_quad)
{
MeshExtract_EditUVData_Data *data = static_cast<MeshExtract_EditUVData_Data *>(_data);
int *subdiv_loop_vert_index = (int *)GPU_vertbuf_get_data(subdiv_cache->verts_orig_index);
int *subdiv_loop_edge_index = (int *)GPU_vertbuf_get_data(subdiv_cache->edges_orig_index);
uint start_loop_idx = subdiv_quad_index * 4;
uint end_loop_idx = (subdiv_quad_index + 1) * 4;
for (uint i = start_loop_idx; i < end_loop_idx; i++) {
const int vert_origindex = subdiv_loop_vert_index[i];
int edge_origindex = subdiv_loop_edge_index[i];
EditLoopData *edit_loop_data = &data->vbo_data[i];
memset(edit_loop_data, 0, sizeof(EditLoopData));
if (vert_origindex != -1 && edge_origindex != -1) {
BMEdge *eed = BM_edge_at_index(mr->bm, edge_origindex);
/* Loop on an edge endpoint. */
BMLoop *l = BM_face_edge_share_loop(const_cast<BMFace *>(coarse_quad), eed);
mesh_render_data_loop_flag(mr, l, data->cd_ofs, edit_loop_data);
mesh_render_data_loop_edge_flag(mr, l, data->cd_ofs, edit_loop_data);
}
else {
if (edge_origindex == -1) {
/* 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 uint loop_index_last = (i == start_loop_idx) ? end_loop_idx - 1 : i - 1;
edge_origindex = subdiv_loop_edge_index[loop_index_last];
}
if (edge_origindex != -1) {
/* Mapped points on an edge between two edit verts. */
BMEdge *eed = BM_edge_at_index(mr->bm, edge_origindex);
BMLoop *l = BM_face_edge_share_loop(const_cast<BMFace *>(coarse_quad), eed);
mesh_render_data_loop_edge_flag(mr, l, data->cd_ofs, edit_loop_data);
}
}
mesh_render_data_face_flag(mr, coarse_quad, data->cd_ofs, edit_loop_data);
}
}
static void extract_edituv_data_iter_subdiv_mesh(const DRWSubdivCache *subdiv_cache,
const MeshRenderData *mr,
void *_data,
uint subdiv_quad_index,
const MPoly *coarse_quad)
{
const int coarse_quad_index = static_cast<int>(coarse_quad - mr->mpoly);
BMFace *coarse_quad_bm = bm_original_face_get(mr, coarse_quad_index);
extract_edituv_data_iter_subdiv_bm(subdiv_cache, mr, _data, subdiv_quad_index, coarse_quad_bm);
}
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.init_subdiv = extract_edituv_data_init_subdiv;
extractor.iter_subdiv_bm = extract_edituv_data_iter_subdiv_bm;
extractor.iter_subdiv_mesh = extract_edituv_data_iter_subdiv_mesh;
extractor.data_type = MR_DATA_NONE;
extractor.data_size = sizeof(MeshExtract_EditUVData_Data);
extractor.use_threading = true;
extractor.mesh_buffer_offset = offsetof(MeshBufferList, vbo.edituv_data);
return extractor;
}
/** \} */
} // namespace blender::draw
const MeshExtract extract_edituv_data = blender::draw::create_extractor_edituv_data();
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