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/*
* 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 Loop Normal
* \{ */
static void extract_lnor_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, "nor", GPU_COMP_I10, 4, GPU_FETCH_INT_TO_FLOAT_UNIT);
GPU_vertformat_alias_add(&format, "lnor");
}
GPU_vertbuf_init_with_format(vbo, &format);
GPU_vertbuf_data_alloc(vbo, mr->loop_len);
*(GPUPackedNormal **)tls_data = static_cast<GPUPackedNormal *>(GPU_vertbuf_get_data(vbo));
}
static void extract_lnor_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);
if (mr->loop_normals) {
(*(GPUPackedNormal **)data)[l_index] = GPU_normal_convert_i10_v3(mr->loop_normals[l_index]);
}
else {
if (BM_elem_flag_test(f, BM_ELEM_SMOOTH)) {
(*(GPUPackedNormal **)data)[l_index] = GPU_normal_convert_i10_v3(
bm_vert_no_get(mr, l_iter->v));
}
else {
(*(GPUPackedNormal **)data)[l_index] = GPU_normal_convert_i10_v3(bm_face_no_get(mr, f));
}
}
(*(GPUPackedNormal **)data)[l_index].w = BM_elem_flag_test(f, BM_ELEM_HIDDEN) ? -1 : 0;
} while ((l_iter = l_iter->next) != l_first);
}
static void extract_lnor_iter_poly_mesh(const MeshRenderData *mr,
const MPoly *mp,
const int mp_index,
void *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];
GPUPackedNormal *lnor_data = &(*(GPUPackedNormal **)data)[ml_index];
if (mr->loop_normals) {
*lnor_data = GPU_normal_convert_i10_v3(mr->loop_normals[ml_index]);
}
else if (mp->flag & ME_SMOOTH) {
*lnor_data = GPU_normal_convert_i10_s3(mr->mvert[ml->v].no);
}
else {
*lnor_data = GPU_normal_convert_i10_v3(mr->poly_normals[mp_index]);
}
/* Flag for paint mode overlay.
* Only use MR_EXTRACT_MAPPED in edit mode where it is used to display the edge-normals.
* In paint mode it will use the un-mapped data to draw the wire-frame. */
if (mp->flag & ME_HIDE || (mr->edit_bmesh && mr->extract_type == MR_EXTRACT_MAPPED &&
(mr->v_origindex) && mr->v_origindex[ml->v] == ORIGINDEX_NONE)) {
lnor_data->w = -1;
}
else if (mp->flag & ME_FACE_SEL) {
lnor_data->w = 1;
}
else {
lnor_data->w = 0;
}
}
}
constexpr MeshExtract create_extractor_lnor()
{
MeshExtract extractor = {nullptr};
extractor.init = extract_lnor_init;
extractor.iter_poly_bm = extract_lnor_iter_poly_bm;
extractor.iter_poly_mesh = extract_lnor_iter_poly_mesh;
extractor.data_type = MR_DATA_LOOP_NOR;
extractor.data_size = sizeof(GPUPackedNormal *);
extractor.use_threading = true;
extractor.mesh_buffer_offset = offsetof(MeshBufferCache, vbo.lnor);
return extractor;
}
/** \} */
/* ---------------------------------------------------------------------- */
/** \name Extract HQ Loop Normal
* \{ */
struct gpuHQNor {
short x, y, z, w;
};
static void extract_lnor_hq_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, "nor", GPU_COMP_I16, 4, GPU_FETCH_INT_TO_FLOAT_UNIT);
GPU_vertformat_alias_add(&format, "lnor");
}
GPU_vertbuf_init_with_format(vbo, &format);
GPU_vertbuf_data_alloc(vbo, mr->loop_len);
*(gpuHQNor **)tls_data = static_cast<gpuHQNor *>(GPU_vertbuf_get_data(vbo));
}
static void extract_lnor_hq_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);
if (mr->loop_normals) {
normal_float_to_short_v3(&(*(gpuHQNor **)data)[l_index].x, mr->loop_normals[l_index]);
}
else {
if (BM_elem_flag_test(f, BM_ELEM_SMOOTH)) {
normal_float_to_short_v3(&(*(gpuHQNor **)data)[l_index].x, bm_vert_no_get(mr, l_iter->v));
}
else {
normal_float_to_short_v3(&(*(gpuHQNor **)data)[l_index].x, bm_face_no_get(mr, f));
}
}
} while ((l_iter = l_iter->next) != l_first);
}
static void extract_lnor_hq_iter_poly_mesh(const MeshRenderData *mr,
const MPoly *mp,
const int mp_index,
void *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];
gpuHQNor *lnor_data = &(*(gpuHQNor **)data)[ml_index];
if (mr->loop_normals) {
normal_float_to_short_v3(&lnor_data->x, mr->loop_normals[ml_index]);
}
else if (mp->flag & ME_SMOOTH) {
copy_v3_v3_short(&lnor_data->x, mr->mvert[ml->v].no);
}
else {
normal_float_to_short_v3(&lnor_data->x, mr->poly_normals[mp_index]);
}
/* Flag for paint mode overlay.
* Only use #MR_EXTRACT_MAPPED in edit mode where it is used to display the edge-normals.
* In paint mode it will use the un-mapped data to draw the wire-frame. */
if (mp->flag & ME_HIDE || (mr->edit_bmesh && mr->extract_type == MR_EXTRACT_MAPPED &&
(mr->v_origindex) && mr->v_origindex[ml->v] == ORIGINDEX_NONE)) {
lnor_data->w = -1;
}
else if (mp->flag & ME_FACE_SEL) {
lnor_data->w = 1;
}
else {
lnor_data->w = 0;
}
}
}
constexpr MeshExtract create_extractor_lnor_hq()
{
MeshExtract extractor = {nullptr};
extractor.init = extract_lnor_hq_init;
extractor.iter_poly_bm = extract_lnor_hq_iter_poly_bm;
extractor.iter_poly_mesh = extract_lnor_hq_iter_poly_mesh;
extractor.data_type = MR_DATA_LOOP_NOR;
extractor.data_size = sizeof(gpuHQNor *);
extractor.use_threading = true;
extractor.mesh_buffer_offset = offsetof(MeshBufferCache, vbo.lnor);
return extractor;
}
/** \} */
} // namespace blender::draw
extern "C" {
const MeshExtract extract_lnor = blender::draw::create_extractor_lnor();
const MeshExtract extract_lnor_hq = blender::draw::create_extractor_lnor_hq();
}
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