extract_mesh_vbo_fdots_edituv_data.cc

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/* SPDX-FileCopyrightText: 2021 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */

 
#include "extract_mesh.hh"
 
#include "draw_cache_impl.hh"
 
namespace blender::draw {
 
gpu::VertBufPtr extract_face_dots_edituv_data(const MeshRenderData &mr)
{
  static const GPUVertFormat format = []() {
    GPUVertFormat format{};
    GPU_vertformat_attr_add(&format, "data", gpu::VertAttrType::UINT_8_8_8_8);
    GPU_vertformat_alias_add(&format, "flag");
    return format;
  }();
  gpu::VertBufPtr vbo = gpu::VertBufPtr(GPU_vertbuf_create_with_format(format));
  GPU_vertbuf_data_alloc(*vbo, mr.faces_num);
  MutableSpan vbo_data = vbo->data<EditLoopData>();
  const BMesh &bm = *mr.bm;
  const BMUVOffsets offsets = BM_uv_map_offsets_get(&bm);
  if (mr.extract_type == MeshExtractType::BMesh) {
    threading::parallel_for(IndexRange(bm.totface), 2048, [&](const IndexRange range) {
      for (const int face_index : range) {
        const BMFace &face = *BM_face_at_index(&const_cast<BMesh &>(bm), face_index);
        vbo_data[face_index] = {};
        mesh_render_data_face_flag(mr, &face, offsets, vbo_data[face_index]);
      }
    });
  }
  else {
    if (mr.orig_index_face) {
      const Span<int> orig_index_face(mr.orig_index_face, mr.faces_num);
      threading::parallel_for(IndexRange(mr.faces_num), 4096, [&](const IndexRange range) {
        for (const int face : range) {
          vbo_data[face] = {};
          if (orig_index_face[face] == ORIGINDEX_NONE) {
            continue;
          }
          const BMFace *orig_face = bm_original_face_get(mr, face);
          mesh_render_data_face_flag(mr, orig_face, offsets, vbo_data[face]);
        }
      });
    }
    else {
      vbo_data.fill({});
    }
  }
  return vbo;
}
 
}  // namespace blender::draw