Cleanup: move extract points into own compile unit.

1 files changed, 174 insertions, 0 deletions

diff --git a/source/blender/draw/intern/mesh_extractors/extract_mesh_ibo_points.cc b/source/blender/draw/intern/mesh_extractors/extract_mesh_ibo_points.cc
new file mode 100644
index 00000000000..ee80a3c458c
--- /dev/null
+++ b/source/blender/draw/intern/mesh_extractors/extract_mesh_ibo_points.cc
@@ -0,0 +1,174 @@
+/*
+ * 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"
+
+#include "BLI_vector.hh"
+
+#include "MEM_guardedalloc.h"
+
+namespace blender::draw {
+
+/* ---------------------------------------------------------------------- */
+/** \name Extract Point Indices
+ * \{ */
+static void *extract_points_init(const MeshRenderData *mr,
+                                 struct MeshBatchCache *UNUSED(cache),
+                                 void *UNUSED(buf))
+{
+  GPUIndexBufBuilder *elb = static_cast<GPUIndexBufBuilder *>(MEM_mallocN(sizeof(*elb), __func__));
+  GPU_indexbuf_init(elb, GPU_PRIM_POINTS, mr->vert_len, mr->loop_len + mr->loop_loose_len);
+  return elb;
+}
+
+BLI_INLINE void vert_set_bm(GPUIndexBufBuilder *elb, BMVert *eve, int l_index)
+{
+  const int v_index = BM_elem_index_get(eve);
+  if (!BM_elem_flag_test(eve, BM_ELEM_HIDDEN)) {
+    GPU_indexbuf_set_point_vert(elb, v_index, l_index);
+  }
+  else {
+    GPU_indexbuf_set_point_restart(elb, v_index);
+  }
+}
+
+BLI_INLINE void vert_set_mesh(GPUIndexBufBuilder *elb,
+                              const MeshRenderData *mr,
+                              const int v_index,
+                              const int l_index)
+{
+  const MVert *mv = &mr->mvert[v_index];
+  if (!((mr->use_hide && (mv->flag & ME_HIDE)) ||
+        ((mr->extract_type == MR_EXTRACT_MAPPED) && (mr->v_origindex) &&
+         (mr->v_origindex[v_index] == ORIGINDEX_NONE)))) {
+    GPU_indexbuf_set_point_vert(elb, v_index, l_index);
+  }
+  else {
+    GPU_indexbuf_set_point_restart(elb, v_index);
+  }
+}
+
+static void extract_points_iter_poly_bm(const MeshRenderData *UNUSED(mr),
+                                        BMFace *f,
+                                        const int UNUSED(f_index),
+                                        void *_userdata)
+{
+  GPUIndexBufBuilder *elb = static_cast<GPUIndexBufBuilder *>(_userdata);
+  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);
+
+    vert_set_bm(elb, l_iter->v, l_index);
+  } while ((l_iter = l_iter->next) != l_first);
+}
+
+static void extract_points_iter_poly_mesh(const MeshRenderData *mr,
+                                          const MPoly *mp,
+                                          const int UNUSED(mp_index),
+                                          void *_userdata)
+{
+  GPUIndexBufBuilder *elb = static_cast<GPUIndexBufBuilder *>(_userdata);
+  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];
+    vert_set_mesh(elb, mr, ml->v, ml_index);
+  }
+}
+
+static void extract_points_iter_ledge_bm(const MeshRenderData *mr,
+                                         BMEdge *eed,
+                                         const int ledge_index,
+                                         void *_userdata)
+{
+  GPUIndexBufBuilder *elb = static_cast<GPUIndexBufBuilder *>(_userdata);
+  vert_set_bm(elb, eed->v1, mr->loop_len + (ledge_index * 2));
+  vert_set_bm(elb, eed->v2, mr->loop_len + (ledge_index * 2) + 1);
+}
+
+static void extract_points_iter_ledge_mesh(const MeshRenderData *mr,
+                                           const MEdge *med,
+                                           const uint ledge_index,
+                                           void *_userdata)
+{
+  GPUIndexBufBuilder *elb = static_cast<GPUIndexBufBuilder *>(_userdata);
+  vert_set_mesh(elb, mr, med->v1, mr->loop_len + (ledge_index * 2));
+  vert_set_mesh(elb, mr, med->v2, mr->loop_len + (ledge_index * 2) + 1);
+}
+
+static void extract_points_iter_lvert_bm(const MeshRenderData *mr,
+                                         BMVert *eve,
+                                         const int lvert_index,
+                                         void *_userdata)
+{
+  GPUIndexBufBuilder *elb = static_cast<GPUIndexBufBuilder *>(_userdata);
+  const int offset = mr->loop_len + (mr->edge_loose_len * 2);
+  vert_set_bm(elb, eve, offset + lvert_index);
+}
+
+static void extract_points_iter_lvert_mesh(const MeshRenderData *mr,
+                                           const MVert *UNUSED(mv),
+                                           const int lvert_index,
+                                           void *_userdata)
+{
+  GPUIndexBufBuilder *elb = static_cast<GPUIndexBufBuilder *>(_userdata);
+  const int offset = mr->loop_len + (mr->edge_loose_len * 2);
+  vert_set_mesh(elb, mr, mr->lverts[lvert_index], offset + lvert_index);
+}
+
+static void extract_points_finish(const MeshRenderData *UNUSED(mr),
+                                  struct MeshBatchCache *UNUSED(cache),
+                                  void *buf,
+                                  void *_userdata)
+{
+  GPUIndexBufBuilder *elb = static_cast<GPUIndexBufBuilder *>(_userdata);
+  GPUIndexBuf *ibo = static_cast<GPUIndexBuf *>(buf);
+  GPU_indexbuf_build_in_place(elb, ibo);
+  MEM_freeN(elb);
+}
+
+constexpr MeshExtract create_extractor_points()
+{
+  MeshExtract extractor = {0};
+  extractor.init = extract_points_init;
+  extractor.iter_poly_bm = extract_points_iter_poly_bm;
+  extractor.iter_poly_mesh = extract_points_iter_poly_mesh;
+  extractor.iter_ledge_bm = extract_points_iter_ledge_bm;
+  extractor.iter_ledge_mesh = extract_points_iter_ledge_mesh;
+  extractor.iter_lvert_bm = extract_points_iter_lvert_bm;
+  extractor.iter_lvert_mesh = extract_points_iter_lvert_mesh;
+  extractor.finish = extract_points_finish;
+  extractor.data_type = MR_DATA_NONE;
+  extractor.use_threading = true;
+  extractor.mesh_buffer_offset = offsetof(MeshBufferCache, ibo.points);
+  return extractor;
+}
+
+}  // namespace blender::draw
+
+extern "C" {
+const MeshExtract extract_points = blender::draw::create_extractor_points();
+}
+
+/** \} */