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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2021 Blender Foundation. All rights reserved. */
/** \file
* \ingroup draw
*/
#include "MEM_guardedalloc.h"
#include "BLI_string.h"
#include "BKE_mesh.h"
#include "BKE_paint.h"
#include "draw_subdivision.h"
#include "extract_mesh.hh"
namespace blender::draw {
/* ---------------------------------------------------------------------- */
/** \name Extract Sculpt Data
* \{ */
static GPUVertFormat *get_sculpt_data_format()
{
static GPUVertFormat format = {0};
if (format.attr_len == 0) {
GPU_vertformat_attr_add(&format, "fset", GPU_COMP_U8, 4, GPU_FETCH_INT_TO_FLOAT_UNIT);
GPU_vertformat_attr_add(&format, "msk", GPU_COMP_F32, 1, GPU_FETCH_FLOAT);
}
return &format;
}
static void extract_sculpt_data_init(const MeshRenderData *mr,
MeshBatchCache * /*cache*/,
void *buf,
void * /*tls_data*/)
{
GPUVertBuf *vbo = static_cast<GPUVertBuf *>(buf);
GPUVertFormat *format = get_sculpt_data_format();
CustomData *cd_ldata = (mr->extract_type == MR_EXTRACT_BMESH) ? &mr->bm->ldata : &mr->me->ldata;
CustomData *cd_vdata = (mr->extract_type == MR_EXTRACT_BMESH) ? &mr->bm->vdata : &mr->me->vdata;
CustomData *cd_pdata = (mr->extract_type == MR_EXTRACT_BMESH) ? &mr->bm->pdata : &mr->me->pdata;
const float *cd_mask = (const float *)CustomData_get_layer(cd_vdata, CD_PAINT_MASK);
const int *cd_face_set = (const int *)CustomData_get_layer_named(
cd_pdata, CD_PROP_INT32, ".sculpt_face_set");
GPU_vertbuf_init_with_format(vbo, format);
GPU_vertbuf_data_alloc(vbo, mr->loop_len);
struct gpuSculptData {
uint8_t face_set_color[4];
float mask;
};
gpuSculptData *vbo_data = (gpuSculptData *)GPU_vertbuf_get_data(vbo);
const MLoop *loops = (const MLoop *)CustomData_get_layer(cd_ldata, CD_MLOOP);
if (mr->extract_type == MR_EXTRACT_BMESH) {
int cd_mask_ofs = CustomData_get_offset(cd_vdata, CD_PAINT_MASK);
int cd_face_set_ofs = CustomData_get_offset_named(cd_pdata, CD_PROP_INT32, ".sculpt_face_set");
BMIter f_iter;
BMFace *efa;
BM_ITER_MESH (efa, &f_iter, mr->bm, BM_FACES_OF_MESH) {
BMLoop *l_iter, *l_first;
l_iter = l_first = BM_FACE_FIRST_LOOP(efa);
do {
float v_mask = 0.0f;
if (cd_mask) {
v_mask = BM_ELEM_CD_GET_FLOAT(l_iter->v, cd_mask_ofs);
}
vbo_data->mask = v_mask;
uchar face_set_color[4] = {UCHAR_MAX, UCHAR_MAX, UCHAR_MAX, UCHAR_MAX};
if (cd_face_set) {
const int face_set_id = BM_ELEM_CD_GET_INT(l_iter->f, cd_face_set_ofs);
if (face_set_id != mr->me->face_sets_color_default) {
BKE_paint_face_set_overlay_color_get(
face_set_id, mr->me->face_sets_color_seed, face_set_color);
}
}
copy_v3_v3_uchar(vbo_data->face_set_color, face_set_color);
vbo_data++;
} while ((l_iter = l_iter->next) != l_first);
}
}
else {
int mp_loop = 0;
for (int mp_index = 0; mp_index < mr->poly_len; mp_index++) {
const MPoly *p = &mr->mpoly[mp_index];
for (int l = 0; l < p->totloop; l++) {
float v_mask = 0.0f;
if (cd_mask) {
v_mask = cd_mask[loops[mp_loop].v];
}
vbo_data->mask = v_mask;
uchar face_set_color[4] = {UCHAR_MAX, UCHAR_MAX, UCHAR_MAX, UCHAR_MAX};
if (cd_face_set) {
const int face_set_id = cd_face_set[mp_index];
/* Skip for the default color Face Set to render it white. */
if (face_set_id != mr->me->face_sets_color_default) {
BKE_paint_face_set_overlay_color_get(
face_set_id, mr->me->face_sets_color_seed, face_set_color);
}
}
copy_v3_v3_uchar(vbo_data->face_set_color, face_set_color);
mp_loop++;
vbo_data++;
}
}
}
}
static void extract_sculpt_data_init_subdiv(const DRWSubdivCache *subdiv_cache,
const MeshRenderData *mr,
MeshBatchCache * /*cache*/,
void *buffer,
void * /*data*/)
{
GPUVertBuf *vbo = static_cast<GPUVertBuf *>(buffer);
Mesh *coarse_mesh = mr->me;
CustomData *cd_vdata = &coarse_mesh->vdata;
CustomData *cd_pdata = &coarse_mesh->pdata;
/* First, interpolate mask if available. */
GPUVertBuf *mask_vbo = nullptr;
GPUVertBuf *subdiv_mask_vbo = nullptr;
const float *cd_mask = (const float *)CustomData_get_layer(cd_vdata, CD_PAINT_MASK);
const Span<MPoly> coarse_polys = coarse_mesh->polys();
const Span<MLoop> coarse_loops = coarse_mesh->loops();
if (cd_mask) {
GPUVertFormat mask_format = {0};
GPU_vertformat_attr_add(&mask_format, "msk", GPU_COMP_F32, 1, GPU_FETCH_FLOAT);
mask_vbo = GPU_vertbuf_calloc();
GPU_vertbuf_init_with_format(mask_vbo, &mask_format);
GPU_vertbuf_data_alloc(mask_vbo, coarse_mesh->totloop);
float *v_mask = static_cast<float *>(GPU_vertbuf_get_data(mask_vbo));
for (int i = 0; i < coarse_mesh->totpoly; i++) {
const MPoly *mpoly = &coarse_polys[i];
for (int loop_index = mpoly->loopstart; loop_index < mpoly->loopstart + mpoly->totloop;
loop_index++) {
const MLoop *ml = &coarse_loops[loop_index];
*v_mask++ = cd_mask[ml->v];
}
}
subdiv_mask_vbo = GPU_vertbuf_calloc();
GPU_vertbuf_init_build_on_device(
subdiv_mask_vbo, &mask_format, subdiv_cache->num_subdiv_loops);
draw_subdiv_interp_custom_data(subdiv_cache, mask_vbo, subdiv_mask_vbo, 1, 0, false);
}
/* Then, gather face sets. */
GPUVertFormat face_set_format = {0};
GPU_vertformat_attr_add(&face_set_format, "msk", GPU_COMP_U8, 4, GPU_FETCH_INT_TO_FLOAT_UNIT);
GPUVertBuf *face_set_vbo = GPU_vertbuf_calloc();
GPU_vertbuf_init_with_format(face_set_vbo, &face_set_format);
GPU_vertbuf_data_alloc(face_set_vbo, subdiv_cache->num_subdiv_loops);
struct gpuFaceSet {
uint8_t color[4];
};
gpuFaceSet *face_sets = (gpuFaceSet *)GPU_vertbuf_get_data(face_set_vbo);
const int *cd_face_set = (const int *)CustomData_get_layer_named(
cd_pdata, CD_PROP_INT32, ".sculpt_face_set");
GPUVertFormat *format = get_sculpt_data_format();
GPU_vertbuf_init_build_on_device(vbo, format, subdiv_cache->num_subdiv_loops);
int *subdiv_loop_poly_index = subdiv_cache->subdiv_loop_poly_index;
for (uint i = 0; i < subdiv_cache->num_subdiv_loops; i++) {
const int mp_index = subdiv_loop_poly_index[i];
uchar face_set_color[4] = {UCHAR_MAX, UCHAR_MAX, UCHAR_MAX, UCHAR_MAX};
if (cd_face_set) {
const int face_set_id = cd_face_set[mp_index];
/* Skip for the default color Face Set to render it white. */
if (face_set_id != coarse_mesh->face_sets_color_default) {
BKE_paint_face_set_overlay_color_get(
face_set_id, coarse_mesh->face_sets_color_seed, face_set_color);
}
}
copy_v3_v3_uchar(face_sets->color, face_set_color);
face_sets++;
}
/* Finally, interleave mask and face sets. */
draw_subdiv_build_sculpt_data_buffer(subdiv_cache, subdiv_mask_vbo, face_set_vbo, vbo);
if (mask_vbo) {
GPU_vertbuf_discard(mask_vbo);
GPU_vertbuf_discard(subdiv_mask_vbo);
}
GPU_vertbuf_discard(face_set_vbo);
}
constexpr MeshExtract create_extractor_sculpt_data()
{
MeshExtract extractor = {nullptr};
extractor.init = extract_sculpt_data_init;
extractor.init_subdiv = extract_sculpt_data_init_subdiv;
extractor.data_type = MR_DATA_NONE;
extractor.data_size = 0;
extractor.use_threading = false;
extractor.mesh_buffer_offset = offsetof(MeshBufferList, vbo.sculpt_data);
return extractor;
}
/** \} */
} // namespace blender::draw
const MeshExtract extract_sculpt_data = blender::draw::create_extractor_sculpt_data();
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