diff options
Diffstat (limited to 'source/blender/draw/intern/mesh_extractors/extract_mesh_vbo_fdots_uv.cc')
-rw-r--r-- | source/blender/draw/intern/mesh_extractors/extract_mesh_vbo_fdots_uv.cc | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/source/blender/draw/intern/mesh_extractors/extract_mesh_vbo_fdots_uv.cc b/source/blender/draw/intern/mesh_extractors/extract_mesh_vbo_fdots_uv.cc new file mode 100644 index 00000000000..1adfe9d00de --- /dev/null +++ b/source/blender/draw/intern/mesh_extractors/extract_mesh_vbo_fdots_uv.cc @@ -0,0 +1,127 @@ +/* + * 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" + +namespace blender::draw { + +/* ---------------------------------------------------------------------- */ +/** \name Extract Face-dots UV + * \{ */ + +typedef struct MeshExtract_FdotUV_Data { + float (*vbo_data)[2]; + MLoopUV *uv_data; + int cd_ofs; +} MeshExtract_FdotUV_Data; + +static void extract_fdots_uv_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) { + GPU_vertformat_attr_add(&format, "u", GPU_COMP_F32, 2, GPU_FETCH_FLOAT); + GPU_vertformat_alias_add(&format, "au"); + GPU_vertformat_alias_add(&format, "pos"); + } + + GPU_vertbuf_init_with_format(vbo, &format); + GPU_vertbuf_data_alloc(vbo, mr->poly_len); + + if (!mr->use_subsurf_fdots) { + /* Clear so we can accumulate on it. */ + memset(GPU_vertbuf_get_data(vbo), 0x0, mr->poly_len * GPU_vertbuf_get_format(vbo)->stride); + } + + MeshExtract_FdotUV_Data *data = static_cast<MeshExtract_FdotUV_Data *>(tls_data); + data->vbo_data = (float(*)[2])GPU_vertbuf_get_data(vbo); + + if (mr->extract_type == MR_EXTRACT_BMESH) { + data->cd_ofs = CustomData_get_offset(&mr->bm->ldata, CD_MLOOPUV); + } + else { + data->uv_data = (MLoopUV *)CustomData_get_layer(&mr->me->ldata, CD_MLOOPUV); + } +} + +static void extract_fdots_uv_iter_poly_bm(const MeshRenderData *UNUSED(mr), + const BMFace *f, + const int UNUSED(f_index), + void *_data) +{ + MeshExtract_FdotUV_Data *data = static_cast<MeshExtract_FdotUV_Data *>(_data); + BMLoop *l_iter, *l_first; + l_iter = l_first = BM_FACE_FIRST_LOOP(f); + do { + float w = 1.0f / (float)f->len; + const MLoopUV *luv = (const MLoopUV *)BM_ELEM_CD_GET_VOID_P(l_iter, data->cd_ofs); + madd_v2_v2fl(data->vbo_data[BM_elem_index_get(f)], luv->uv, w); + } while ((l_iter = l_iter->next) != l_first); +} + +static void extract_fdots_uv_iter_poly_mesh(const MeshRenderData *mr, + const MPoly *mp, + const int mp_index, + void *_data) +{ + MeshExtract_FdotUV_Data *data = static_cast<MeshExtract_FdotUV_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]; + if (mr->use_subsurf_fdots) { + const MVert *mv = &mr->mvert[ml->v]; + if (mv->flag & ME_VERT_FACEDOT) { + copy_v2_v2(data->vbo_data[mp_index], data->uv_data[ml_index].uv); + } + } + else { + float w = 1.0f / (float)mp->totloop; + madd_v2_v2fl(data->vbo_data[mp_index], data->uv_data[ml_index].uv, w); + } + } +} + +constexpr MeshExtract create_extractor_fdots_uv() +{ + MeshExtract extractor = {nullptr}; + extractor.init = extract_fdots_uv_init; + extractor.iter_poly_bm = extract_fdots_uv_iter_poly_bm; + extractor.iter_poly_mesh = extract_fdots_uv_iter_poly_mesh; + extractor.data_type = MR_DATA_NONE; + extractor.data_size = sizeof(MeshExtract_FdotUV_Data); + extractor.use_threading = true; + extractor.mesh_buffer_offset = offsetof(MeshBufferCache, vbo.fdots_uv); + return extractor; +} + +/** \} */ + +} // namespace blender::draw + +extern "C" { +const MeshExtract extract_fdots_uv = blender::draw::create_extractor_fdots_uv(); +} |