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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 "BKE_attribute.h"
#include "BLI_string.h"
#include "BLI_vector.hh"
#include "draw_subdivision.h"
#include "extract_mesh.hh"
struct VColRef {
const CustomDataLayer *layer;
eAttrDomain domain;
};
/** Get all vcol layers as AttributeRefs.
*
* \param vcol_layers: bitmask to filter vcol layers by, each bit
* corresponds to the integer position of the attribute
* within the global color attribute list.
*/
static blender::Vector<VColRef> get_vcol_refs(const CustomData *cd_vdata,
const CustomData *cd_ldata,
const uint vcol_layers)
{
blender::Vector<VColRef> refs;
uint layeri = 0;
auto buildList = [&](const CustomData *cdata, eAttrDomain domain) {
for (int i = 0; i < cdata->totlayer; i++) {
const CustomDataLayer *layer = cdata->layers + i;
if (!(CD_TYPE_AS_MASK(layer->type) & CD_MASK_COLOR_ALL)) {
continue;
}
if (layer->flag & CD_FLAG_TEMPORARY) {
continue;
}
if (!(vcol_layers & (1UL << layeri))) {
layeri++;
continue;
}
VColRef ref = {};
ref.domain = domain;
ref.layer = layer;
refs.append(ref);
layeri++;
}
};
buildList(cd_vdata, ATTR_DOMAIN_POINT);
buildList(cd_ldata, ATTR_DOMAIN_CORNER);
return refs;
}
namespace blender::draw {
/* ---------------------------------------------------------------------- */
/** \name Extract VCol
* \{ */
/* Initialize the common vertex format for vcol for coarse and subdivided meshes. */
static void init_vcol_format(GPUVertFormat *format,
const MeshBatchCache *cache,
CustomData *cd_vdata,
CustomData *cd_ldata,
CustomDataLayer *active,
CustomDataLayer *render)
{
GPU_vertformat_deinterleave(format);
const uint32_t vcol_layers = cache->cd_used.vcol;
blender::Vector<VColRef> refs = get_vcol_refs(cd_vdata, cd_ldata, vcol_layers);
for (const VColRef &ref : refs) {
char attr_name[32], attr_safe_name[GPU_MAX_SAFE_ATTR_NAME];
GPU_vertformat_safe_attr_name(ref.layer->name, attr_safe_name, GPU_MAX_SAFE_ATTR_NAME);
/* VCol layer name. */
BLI_snprintf(attr_name, sizeof(attr_name), "a%s", attr_safe_name);
GPU_vertformat_attr_add(format, attr_name, GPU_COMP_U16, 4, GPU_FETCH_INT_TO_FLOAT_UNIT);
/* Active layer name. */
if (ref.layer == active) {
GPU_vertformat_alias_add(format, "ac");
}
/* Active render layer name. */
if (ref.layer == render) {
GPU_vertformat_alias_add(format, "c");
}
}
}
/* Vertex format for vertex colors, only used during the coarse data upload for the subdivision
* case. */
static GPUVertFormat *get_coarse_vcol_format()
{
static GPUVertFormat format = {0};
if (format.attr_len == 0) {
GPU_vertformat_attr_add(&format, "cCol", GPU_COMP_U16, 4, GPU_FETCH_INT_TO_FLOAT_UNIT);
GPU_vertformat_alias_add(&format, "c");
GPU_vertformat_alias_add(&format, "ac");
}
return &format;
}
using gpuMeshVcol = struct gpuMeshVcol {
ushort r, g, b, a;
};
static void extract_vcol_init(const MeshRenderData *mr,
struct MeshBatchCache *cache,
void *buf,
void *UNUSED(tls_data))
{
GPUVertBuf *vbo = static_cast<GPUVertBuf *>(buf);
GPUVertFormat format = {0};
CustomData *cd_vdata = (mr->extract_type == MR_EXTRACT_BMESH) ? &mr->bm->vdata : &mr->me->vdata;
CustomData *cd_ldata = (mr->extract_type == MR_EXTRACT_BMESH) ? &mr->bm->ldata : &mr->me->ldata;
Mesh me_query = blender::dna::shallow_zero_initialize();
BKE_id_attribute_copy_domains_temp(
ID_ME, cd_vdata, nullptr, cd_ldata, nullptr, nullptr, &me_query.id);
CustomDataLayer *active_color = BKE_id_attributes_active_color_get(&me_query.id);
CustomDataLayer *render_color = BKE_id_attributes_render_color_get(&me_query.id);
const uint32_t vcol_layers = cache->cd_used.vcol;
init_vcol_format(&format, cache, cd_vdata, cd_ldata, active_color, render_color);
GPU_vertbuf_init_with_format(vbo, &format);
GPU_vertbuf_data_alloc(vbo, mr->loop_len);
gpuMeshVcol *vcol_data = (gpuMeshVcol *)GPU_vertbuf_get_data(vbo);
blender::Vector<VColRef> refs = get_vcol_refs(cd_vdata, cd_ldata, vcol_layers);
for (const VColRef &ref : refs) {
CustomData *cdata = ref.domain == ATTR_DOMAIN_POINT ? cd_vdata : cd_ldata;
if (mr->extract_type == MR_EXTRACT_BMESH) {
int cd_ofs = ref.layer->offset;
if (cd_ofs == -1) {
vcol_data += ref.domain == ATTR_DOMAIN_POINT ? mr->bm->totvert : mr->bm->totloop;
continue;
}
BMIter iter;
const bool is_byte = ref.layer->type == CD_PROP_BYTE_COLOR;
const bool is_point = ref.domain == ATTR_DOMAIN_POINT;
BMFace *f;
BM_ITER_MESH (f, &iter, mr->bm, BM_FACES_OF_MESH) {
BMLoop *l_iter = f->l_first;
do {
BMElem *elem = is_point ? reinterpret_cast<BMElem *>(l_iter->v) :
reinterpret_cast<BMElem *>(l_iter);
if (is_byte) {
const MLoopCol *mloopcol = (const MLoopCol *)BM_ELEM_CD_GET_VOID_P(elem, cd_ofs);
vcol_data->r = unit_float_to_ushort_clamp(BLI_color_from_srgb_table[mloopcol->r]);
vcol_data->g = unit_float_to_ushort_clamp(BLI_color_from_srgb_table[mloopcol->g]);
vcol_data->b = unit_float_to_ushort_clamp(BLI_color_from_srgb_table[mloopcol->b]);
vcol_data->a = unit_float_to_ushort_clamp(mloopcol->a * (1.0f / 255.0f));
vcol_data++;
}
else {
const MPropCol *mpcol = (const MPropCol *)BM_ELEM_CD_GET_VOID_P(elem, cd_ofs);
vcol_data->r = unit_float_to_ushort_clamp(mpcol->color[0]);
vcol_data->g = unit_float_to_ushort_clamp(mpcol->color[1]);
vcol_data->b = unit_float_to_ushort_clamp(mpcol->color[2]);
vcol_data->a = unit_float_to_ushort_clamp(mpcol->color[3]);
vcol_data++;
}
} while ((l_iter = l_iter->next) != f->l_first);
}
}
else {
int totloop = mr->loop_len;
int idx = CustomData_get_named_layer_index(cdata, ref.layer->type, ref.layer->name);
MLoopCol *mcol = nullptr;
MPropCol *pcol = nullptr;
const MLoop *mloop = mr->mloop;
if (ref.layer->type == CD_PROP_COLOR) {
pcol = static_cast<MPropCol *>(cdata->layers[idx].data);
}
else {
mcol = static_cast<MLoopCol *>(cdata->layers[idx].data);
}
const bool is_corner = ref.domain == ATTR_DOMAIN_CORNER;
for (int i = 0; i < totloop; i++, mloop++) {
const int v_i = is_corner ? i : mloop->v;
if (mcol) {
vcol_data->r = unit_float_to_ushort_clamp(BLI_color_from_srgb_table[mcol[v_i].r]);
vcol_data->g = unit_float_to_ushort_clamp(BLI_color_from_srgb_table[mcol[v_i].g]);
vcol_data->b = unit_float_to_ushort_clamp(BLI_color_from_srgb_table[mcol[v_i].b]);
vcol_data->a = unit_float_to_ushort_clamp(mcol[v_i].a * (1.0f / 255.0f));
vcol_data++;
}
else if (pcol) {
vcol_data->r = unit_float_to_ushort_clamp(pcol[v_i].color[0]);
vcol_data->g = unit_float_to_ushort_clamp(pcol[v_i].color[1]);
vcol_data->b = unit_float_to_ushort_clamp(pcol[v_i].color[2]);
vcol_data->a = unit_float_to_ushort_clamp(pcol[v_i].color[3]);
vcol_data++;
}
}
}
}
}
static void extract_vcol_init_subdiv(const DRWSubdivCache *subdiv_cache,
const MeshRenderData *mr,
struct MeshBatchCache *cache,
void *buffer,
void *UNUSED(data))
{
GPUVertBuf *dst_buffer = static_cast<GPUVertBuf *>(buffer);
Mesh *coarse_mesh = subdiv_cache->mesh;
bool extract_bmesh = mr->extract_type == MR_EXTRACT_BMESH;
const CustomData *cd_vdata = extract_bmesh ? &coarse_mesh->edit_mesh->bm->vdata :
&coarse_mesh->vdata;
const CustomData *cd_ldata = extract_bmesh ? &coarse_mesh->edit_mesh->bm->ldata :
&coarse_mesh->ldata;
const int totloop = extract_bmesh ? coarse_mesh->edit_mesh->bm->totloop : coarse_mesh->totloop;
Mesh me_query = blender::dna::shallow_copy(*coarse_mesh);
BKE_id_attribute_copy_domains_temp(
ID_ME, cd_vdata, nullptr, cd_ldata, nullptr, nullptr, &me_query.id);
CustomDataLayer *active_color = BKE_id_attributes_active_color_get(&me_query.id);
CustomDataLayer *render_color = BKE_id_attributes_render_color_get(&me_query.id);
GPUVertFormat format = {0};
init_vcol_format(
&format, cache, &coarse_mesh->vdata, &coarse_mesh->ldata, active_color, render_color);
GPU_vertbuf_init_build_on_device(dst_buffer, &format, subdiv_cache->num_subdiv_loops);
GPUVertBuf *src_data = GPU_vertbuf_calloc();
/* Dynamic as we upload and interpolate layers one at a time. */
GPU_vertbuf_init_with_format_ex(src_data, get_coarse_vcol_format(), GPU_USAGE_DYNAMIC);
GPU_vertbuf_data_alloc(src_data, totloop);
gpuMeshVcol *mesh_vcol = (gpuMeshVcol *)GPU_vertbuf_get_data(src_data);
const uint vcol_layers = cache->cd_used.vcol;
blender::Vector<VColRef> refs = get_vcol_refs(cd_vdata, cd_ldata, vcol_layers);
/* Index of the vertex color layer in the compact buffer. Used vertex color layers are stored in
* a single buffer. */
int pack_layer_index = 0;
for (const VColRef &ref : refs) {
/* Include stride in offset, we use a stride of 2 since colors are packed into 2 uints. */
const int dst_offset = (int)subdiv_cache->num_subdiv_loops * 2 * pack_layer_index++;
const CustomData *cdata = ref.domain == ATTR_DOMAIN_POINT ? cd_vdata : cd_ldata;
int layer_i = CustomData_get_named_layer_index(cdata, ref.layer->type, ref.layer->name);
if (layer_i == -1) {
printf("%s: missing color layer %s\n", __func__, ref.layer->name);
continue;
}
gpuMeshVcol *vcol = mesh_vcol;
const bool is_vert = ref.domain == ATTR_DOMAIN_POINT;
if (extract_bmesh) {
BMesh *bm = coarse_mesh->edit_mesh->bm;
BMIter iter;
BMFace *f;
int cd_ofs = cdata->layers[layer_i].offset;
const bool is_byte = ref.layer->type == CD_PROP_BYTE_COLOR;
BM_ITER_MESH (f, &iter, bm, BM_FACES_OF_MESH) {
BMLoop *l_iter = f->l_first;
do {
BMElem *elem = is_vert ? reinterpret_cast<BMElem *>(l_iter->v) :
reinterpret_cast<BMElem *>(l_iter);
if (is_byte) {
MLoopCol *mcol2 = static_cast<MLoopCol *>(BM_ELEM_CD_GET_VOID_P(elem, cd_ofs));
vcol->r = unit_float_to_ushort_clamp(BLI_color_from_srgb_table[mcol2->r]);
vcol->g = unit_float_to_ushort_clamp(BLI_color_from_srgb_table[mcol2->g]);
vcol->b = unit_float_to_ushort_clamp(BLI_color_from_srgb_table[mcol2->b]);
vcol->a = unit_float_to_ushort_clamp(mcol2->a * (1.0f / 255.0f));
}
else {
MPropCol *pcol2 = static_cast<MPropCol *>(BM_ELEM_CD_GET_VOID_P(elem, cd_ofs));
vcol->r = unit_float_to_ushort_clamp(pcol2->color[0]);
vcol->g = unit_float_to_ushort_clamp(pcol2->color[1]);
vcol->b = unit_float_to_ushort_clamp(pcol2->color[2]);
vcol->a = unit_float_to_ushort_clamp(pcol2->color[3]);
}
vcol++;
} while ((l_iter = l_iter->next) != f->l_first);
}
}
else {
const MLoop *ml = coarse_mesh->mloop;
MLoopCol *mcol = nullptr;
MPropCol *pcol = nullptr;
if (ref.layer->type == CD_PROP_COLOR) {
pcol = static_cast<MPropCol *>(cdata->layers[layer_i].data);
}
else {
mcol = static_cast<MLoopCol *>(cdata->layers[layer_i].data);
}
for (int ml_index = 0; ml_index < coarse_mesh->totloop; ml_index++, vcol++, ml++) {
int idx = is_vert ? ml->v : ml_index;
if (mcol) {
vcol->r = unit_float_to_ushort_clamp(BLI_color_from_srgb_table[mcol[idx].r]);
vcol->g = unit_float_to_ushort_clamp(BLI_color_from_srgb_table[mcol[idx].g]);
vcol->b = unit_float_to_ushort_clamp(BLI_color_from_srgb_table[mcol[idx].b]);
vcol->a = unit_float_to_ushort_clamp(mcol[idx].a * (1.0f / 255.0f));
}
else if (pcol) {
vcol->r = unit_float_to_ushort_clamp(pcol[idx].color[0]);
vcol->g = unit_float_to_ushort_clamp(pcol[idx].color[1]);
vcol->b = unit_float_to_ushort_clamp(pcol[idx].color[2]);
vcol->a = unit_float_to_ushort_clamp(pcol[idx].color[3]);
}
}
}
/* Ensure data is uploaded properly. */
GPU_vertbuf_tag_dirty(src_data);
draw_subdiv_interp_custom_data(subdiv_cache, src_data, dst_buffer, 4, dst_offset, true);
}
GPU_vertbuf_discard(src_data);
}
constexpr MeshExtract create_extractor_vcol()
{
MeshExtract extractor = {nullptr};
extractor.init = extract_vcol_init;
extractor.init_subdiv = extract_vcol_init_subdiv;
extractor.data_type = MR_DATA_NONE;
extractor.data_size = 0;
extractor.use_threading = false;
extractor.mesh_buffer_offset = offsetof(MeshBufferList, vbo.vcol);
return extractor;
}
/** \} */
} // namespace blender::draw
const MeshExtract extract_vcol = blender::draw::create_extractor_vcol();
|