Cleanup: Move displist.cc to C++

This is a change split from the geometry nodes curves branch. Since
curve object modifier evaluation happens in this file, moving it to C++
will be quite helpful to support the `GeometrySet` type. Other than
that, the code in the branch intends to replace a fair amount of this
file anyway, so I don't plan to do any further cleanup here.

Differential Revision: https://developer.blender.org/D11078

1 files changed, 0 insertions, 1818 deletions

diff --git a/source/blender/blenkernel/intern/displist.c b/source/blender/blenkernel/intern/displist.c
deleted file mode 100644
index ad8939fa5d1..00000000000
--- a/source/blender/blenkernel/intern/displist.c
+++ /dev/null
@@ -1,1818 +0,0 @@
-/*
- * 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) 2001-2002 by NaN Holding BV.
- * All rights reserved.
- */
-
-/** \file
- * \ingroup bke
- */
-
-#include <math.h>
-#include <stdio.h>
-#include <string.h>
-
-#include "MEM_guardedalloc.h"
-
-#include "DNA_curve_types.h"
-#include "DNA_mesh_types.h"
-#include "DNA_object_types.h"
-#include "DNA_scene_types.h"
-#include "DNA_vfont_types.h"
-
-#include "BLI_bitmap.h"
-#include "BLI_linklist.h"
-#include "BLI_listbase.h"
-#include "BLI_math.h"
-#include "BLI_memarena.h"
-#include "BLI_scanfill.h"
-#include "BLI_string.h"
-#include "BLI_utildefines.h"
-
-#include "BKE_anim_path.h"
-#include "BKE_curve.h"
-#include "BKE_displist.h"
-#include "BKE_font.h"
-#include "BKE_key.h"
-#include "BKE_lattice.h"
-#include "BKE_lib_id.h"
-#include "BKE_mball.h"
-#include "BKE_mball_tessellate.h"
-#include "BKE_mesh.h"
-#include "BKE_modifier.h"
-#include "BKE_object.h"
-
-#include "BLI_sys_types.h"  // for intptr_t support
-
-#include "DEG_depsgraph.h"
-#include "DEG_depsgraph_query.h"
-
-static void boundbox_displist_object(Object *ob);
-
-void BKE_displist_elem_free(DispList *dl)
-{
-  if (dl) {
-    if (dl->verts) {
-      MEM_freeN(dl->verts);
-    }
-    if (dl->nors) {
-      MEM_freeN(dl->nors);
-    }
-    if (dl->index) {
-      MEM_freeN(dl->index);
-    }
-    MEM_freeN(dl);
-  }
-}
-
-void BKE_displist_free(ListBase *lb)
-{
-  DispList *dl;
-
-  while ((dl = BLI_pophead(lb))) {
-    BKE_displist_elem_free(dl);
-  }
-}
-
-DispList *BKE_displist_find_or_create(ListBase *lb, int type)
-{
-  LISTBASE_FOREACH (DispList *, dl, lb) {
-    if (dl->type == type) {
-      return dl;
-    }
-  }
-
-  DispList *dl = MEM_callocN(sizeof(DispList), "find_disp");
-  dl->type = type;
-  BLI_addtail(lb, dl);
-
-  return dl;
-}
-
-DispList *BKE_displist_find(ListBase *lb, int type)
-{
-  LISTBASE_FOREACH (DispList *, dl, lb) {
-    if (dl->type == type) {
-      return dl;
-    }
-  }
-
-  return NULL;
-}
-
-bool BKE_displist_has_faces(const ListBase *lb)
-{
-  LISTBASE_FOREACH (const DispList *, dl, lb) {
-    if (ELEM(dl->type, DL_INDEX3, DL_INDEX4, DL_SURF)) {
-      return true;
-    }
-  }
-
-  return false;
-}
-
-void BKE_displist_copy(ListBase *lbn, const ListBase *lb)
-{
-  BKE_displist_free(lbn);
-
-  LISTBASE_FOREACH (const DispList *, dl, lb) {
-    DispList *dln = MEM_dupallocN(dl);
-    BLI_addtail(lbn, dln);
-    dln->verts = MEM_dupallocN(dl->verts);
-    dln->nors = MEM_dupallocN(dl->nors);
-    dln->index = MEM_dupallocN(dl->index);
-  }
-}
-
-void BKE_displist_normals_add(ListBase *lb)
-{
-  float *vdata, *ndata, nor[3];
-  float *v1, *v2, *v3, *v4;
-  float *n1, *n2, *n3, *n4;
-  int a, b, p1, p2, p3, p4;
-
-  LISTBASE_FOREACH (DispList *, dl, lb) {
-    if (dl->type == DL_INDEX3) {
-      if (dl->nors == NULL) {
-        dl->nors = MEM_callocN(sizeof(float[3]), "dlnors");
-
-        if (dl->flag & DL_BACK_CURVE) {
-          dl->nors[2] = -1.0f;
-        }
-        else {
-          dl->nors[2] = 1.0f;
-        }
-      }
-    }
-    else if (dl->type == DL_SURF) {
-      if (dl->nors == NULL) {
-        dl->nors = MEM_callocN(sizeof(float[3]) * dl->nr * dl->parts, "dlnors");
-
-        vdata = dl->verts;
-        ndata = dl->nors;
-
-        for (a = 0; a < dl->parts; a++) {
-
-          if (BKE_displist_surfindex_get(dl, a, &b, &p1, &p2, &p3, &p4) == 0) {
-            break;
-          }
-
-          v1 = vdata + 3 * p1;
-          n1 = ndata + 3 * p1;
-          v2 = vdata + 3 * p2;
-          n2 = ndata + 3 * p2;
-          v3 = vdata + 3 * p3;
-          n3 = ndata + 3 * p3;
-          v4 = vdata + 3 * p4;
-          n4 = ndata + 3 * p4;
-
-          for (; b < dl->nr; b++) {
-            normal_quad_v3(nor, v1, v3, v4, v2);
-
-            add_v3_v3(n1, nor);
-            add_v3_v3(n2, nor);
-            add_v3_v3(n3, nor);
-            add_v3_v3(n4, nor);
-
-            v2 = v1;
-            v1 += 3;
-            v4 = v3;
-            v3 += 3;
-            n2 = n1;
-            n1 += 3;
-            n4 = n3;
-            n3 += 3;
-          }
-        }
-        a = dl->parts * dl->nr;
-        v1 = ndata;
-        while (a--) {
-          normalize_v3(v1);
-          v1 += 3;
-        }
-      }
-    }
-  }
-}
-
-void BKE_displist_count(const ListBase *lb, int *totvert, int *totface, int *tottri)
-{
-  LISTBASE_FOREACH (const DispList *, dl, lb) {
-    int vert_tot = 0;
-    int face_tot = 0;
-    int tri_tot = 0;
-    bool cyclic_u = dl->flag & DL_CYCL_U;
-    bool cyclic_v = dl->flag & DL_CYCL_V;
-
-    switch (dl->type) {
-      case DL_SURF: {
-        int segments_u = dl->nr - (cyclic_u == false);
-        int segments_v = dl->parts - (cyclic_v == false);
-        vert_tot = dl->nr * dl->parts;
-        face_tot = segments_u * segments_v;
-        tri_tot = face_tot * 2;
-        break;
-      }
-      case DL_INDEX3: {
-        vert_tot = dl->nr;
-        face_tot = dl->parts;
-        tri_tot = face_tot;
-        break;
-      }
-      case DL_INDEX4: {
-        vert_tot = dl->nr;
-        face_tot = dl->parts;
-        tri_tot = face_tot * 2;
-        break;
-      }
-      case DL_POLY:
-      case DL_SEGM: {
-        vert_tot = dl->nr * dl->parts;
-        break;
-      }
-    }
-
-    *totvert += vert_tot;
-    *totface += face_tot;
-    *tottri += tri_tot;
-  }
-}
-
-bool BKE_displist_surfindex_get(
-    const DispList *dl, int a, int *b, int *p1, int *p2, int *p3, int *p4)
-{
-  if ((dl->flag & DL_CYCL_V) == 0 && a == (dl->parts) - 1) {
-    return false;
-  }
-
-  if (dl->flag & DL_CYCL_U) {
-    (*p1) = dl->nr * a;
-    (*p2) = (*p1) + dl->nr - 1;
-    (*p3) = (*p1) + dl->nr;
-    (*p4) = (*p2) + dl->nr;
-    (*b) = 0;
-  }
-  else {
-    (*p2) = dl->nr * a;
-    (*p1) = (*p2) + 1;
-    (*p4) = (*p2) + dl->nr;
-    (*p3) = (*p1) + dl->nr;
-    (*b) = 1;
-  }
-
-  if ((dl->flag & DL_CYCL_V) && a == dl->parts - 1) {
-    (*p3) -= dl->nr * dl->parts;
-    (*p4) -= dl->nr * dl->parts;
-  }
-
-  return true;
-}
-
-/* ****************** make displists ********************* */
-#ifdef __INTEL_COMPILER
-/* ICC with the optimization -02 causes crashes. */
-#  pragma intel optimization_level 1
-#endif
-
-static void curve_to_displist(const Curve *cu,
-                              const ListBase *nubase,
-                              const bool for_render,
-                              ListBase *r_dispbase)
-{
-  const bool editmode = (!for_render && (cu->editnurb || cu->editfont));
-
-  LISTBASE_FOREACH (Nurb *, nu, nubase) {
-    if (nu->hide != 0 && editmode) {
-      continue;
-    }
-    if (!BKE_nurb_check_valid_u(nu)) {
-      continue;
-    }
-
-    const int resolution = (for_render && cu->resolu_ren != 0) ? cu->resolu_ren : nu->resolu;
-    const bool is_cyclic = nu->flagu & CU_NURB_CYCLIC;
-    const BezTriple *bezt_first = &nu->bezt[0];
-    const BezTriple *bezt_last = &nu->bezt[nu->pntsu - 1];
-
-    if (nu->type == CU_BEZIER) {
-      int samples_len = 0;
-      for (int i = 1; i < nu->pntsu; i++) {
-        const BezTriple *prevbezt = &nu->bezt[i - 1];
-        const BezTriple *bezt = &nu->bezt[i];
-        if (prevbezt->h2 == HD_VECT && bezt->h1 == HD_VECT) {
-          samples_len++;
-        }
-        else {
-          samples_len += resolution;
-        }
-      }
-      if (is_cyclic) {
-        /* If the curve is cyclic, sample the last edge between the last and first points. */
-        if (bezt_first->h1 == HD_VECT && bezt_last->h2 == HD_VECT) {
-          samples_len++;
-        }
-        else {
-          samples_len += resolution;
-        }
-      }
-      else {
-        /* Otherwise, we only need one additional sample to complete the last edge. */
-        samples_len++;
-      }
-
-      /* Check that there are more than two points so the curve doesn't loop back on itself. This
-       * needs to be separate from `is_cyclic` because cyclic sampling can work with two points
-       * and resolution > 1.  */
-      const bool use_cyclic_sample = is_cyclic && (samples_len != 2);
-
-      DispList *dl = MEM_callocN(sizeof(DispList), __func__);
-      /* Add one to the length because of 'BKE_curve_forward_diff_bezier'. */
-      dl->verts = MEM_mallocN(sizeof(float[3]) * (samples_len + 1), "dlverts");
-      BLI_addtail(r_dispbase, dl);
-      dl->parts = 1;
-      dl->nr = samples_len;
-      dl->col = nu->mat_nr;
-      dl->charidx = nu->charidx;
-
-      dl->type = use_cyclic_sample ? DL_POLY : DL_SEGM;
-
-      float *data = dl->verts;
-      for (int i = 1; i < nu->pntsu; i++) {
-        const BezTriple *prevbezt = &nu->bezt[i - 1];
-        const BezTriple *bezt = &nu->bezt[i];
-
-        if (prevbezt->h2 == HD_VECT && bezt->h1 == HD_VECT) {
-          copy_v3_v3(data, prevbezt->vec[1]);
-          data += 3;
-        }
-        else {
-          for (int j = 0; j < 3; j++) {
-            BKE_curve_forward_diff_bezier(prevbezt->vec[1][j],
-                                          prevbezt->vec[2][j],
-                                          bezt->vec[0][j],
-                                          bezt->vec[1][j],
-                                          data + j,
-                                          resolution,
-                                          sizeof(float[3]));
-          }
-          data += 3 * resolution;
-        }
-      }
-      if (is_cyclic) {
-        if (bezt_first->h1 == HD_VECT && bezt_last->h2 == HD_VECT) {
-          copy_v3_v3(data, bezt_last->vec[1]);
-        }
-        else {
-          for (int j = 0; j < 3; j++) {
-            BKE_curve_forward_diff_bezier(bezt_last->vec[1][j],
-                                          bezt_last->vec[2][j],
-                                          bezt_first->vec[0][j],
-                                          bezt_first->vec[1][j],
-                                          data + j,
-                                          resolution,
-                                          sizeof(float[3]));
-          }
-        }
-      }
-      else {
-        copy_v3_v3(data, bezt_last->vec[1]);
-      }
-    }
-    else if (nu->type == CU_NURBS) {
-      const int len = (resolution * SEGMENTSU(nu));
-      DispList *dl = MEM_callocN(sizeof(DispList), __func__);
-      dl->verts = MEM_mallocN(len * sizeof(float[3]), "dlverts");
-      BLI_addtail(r_dispbase, dl);
-      dl->parts = 1;
-      dl->nr = len;
-      dl->col = nu->mat_nr;
-      dl->charidx = nu->charidx;
-      dl->type = is_cyclic ? DL_POLY : DL_SEGM;
-
-      BKE_nurb_makeCurve(nu, dl->verts, NULL, NULL, NULL, resolution, sizeof(float[3]));
-    }
-    else if (nu->type == CU_POLY) {
-      const int len = nu->pntsu;
-      DispList *dl = MEM_callocN(sizeof(DispList), __func__);
-      dl->verts = MEM_mallocN(len * sizeof(float[3]), "dlverts");
-      BLI_addtail(r_dispbase, dl);
-      dl->parts = 1;
-      dl->nr = len;
-      dl->col = nu->mat_nr;
-      dl->charidx = nu->charidx;
-      dl->type = (is_cyclic && (dl->nr != 2)) ? DL_POLY : DL_SEGM;
-
-      float(*coords)[3] = (float(*)[3])dl->verts;
-      for (int i = 0; i < len; i++) {
-        const BPoint *bp = &nu->bp[i];
-        copy_v3_v3(coords[i], bp->vec);
-      }
-    }
-  }
-}
-
-/**
- * \param normal_proj: Optional normal that's used to project the scanfill verts into 2d coords.
- * Pass this along if known since it saves time calculating the normal.
- * This is also used to initialize #DispList.nors (one normal per display list).
- * \param flipnormal: Flip the normal (same as passing \a normal_proj negated)
- */
-void BKE_displist_fill(const ListBase *dispbase,
-                       ListBase *to,
-                       const float normal_proj[3],
-                       const bool flip_normal)
-{
-  if (dispbase == NULL) {
-    return;
-  }
-  if (BLI_listbase_is_empty(dispbase)) {
-    return;
-  }
-
-  const int scanfill_flag = BLI_SCANFILL_CALC_REMOVE_DOUBLES | BLI_SCANFILL_CALC_POLYS |
-                            BLI_SCANFILL_CALC_HOLES;
-
-  MemArena *sf_arena = BLI_memarena_new(BLI_SCANFILL_ARENA_SIZE, __func__);
-
-  short colnr = 0;
-  int charidx = 0;
-  bool should_continue = true;
-  while (should_continue) {
-    should_continue = false;
-    bool nextcol = false;
-
-    ScanFillContext sf_ctx;
-    BLI_scanfill_begin_arena(&sf_ctx, sf_arena);
-
-    int totvert = 0;
-    short dl_flag_accum = 0;
-    short dl_rt_accum = 0;
-    LISTBASE_FOREACH (const DispList *, dl, dispbase) {
-      if (dl->type == DL_POLY) {
-        if (charidx < dl->charidx) {
-          should_continue = true;
-        }
-        else if (charidx == dl->charidx) { /* character with needed index */
-          if (colnr == dl->col) {
-
-            sf_ctx.poly_nr++;
-
-            /* Make verts and edges. */
-            ScanFillVert *sf_vert = NULL;
-            ScanFillVert *sf_vert_last = NULL;
-            ScanFillVert *sf_vert_new = NULL;
-            for (int i = 0; i < dl->nr; i++) {
-              sf_vert_last = sf_vert;
-              sf_vert = BLI_scanfill_vert_add(&sf_ctx, &dl->verts[3 * i]);
-              totvert++;
-              if (sf_vert_last == NULL) {
-                sf_vert_new = sf_vert;
-              }
-              else {
-                BLI_scanfill_edge_add(&sf_ctx, sf_vert_last, sf_vert);
-              }
-            }
-
-            if (sf_vert != NULL && sf_vert_new != NULL) {
-              BLI_scanfill_edge_add(&sf_ctx, sf_vert, sf_vert_new);
-            }
-          }
-          else if (colnr < dl->col) {
-            /* got poly with next material at current char */
-            should_continue = true;
-            nextcol = true;
-          }
-        }
-        dl_flag_accum |= dl->flag;
-        dl_rt_accum |= dl->rt;
-      }
-    }
-
-    const int triangles_len = BLI_scanfill_calc_ex(&sf_ctx, scanfill_flag, normal_proj);
-    if (totvert != 0 && triangles_len != 0) {
-      DispList *dlnew = MEM_callocN(sizeof(DispList), "filldisplist");
-      dlnew->type = DL_INDEX3;
-      dlnew->flag = (dl_flag_accum & (DL_BACK_CURVE | DL_FRONT_CURVE));
-      dlnew->rt = (dl_rt_accum & CU_SMOOTH);
-      dlnew->col = colnr;
-      dlnew->nr = totvert;
-      dlnew->parts = triangles_len;
-
-      dlnew->index = MEM_mallocN(sizeof(int[3]) * triangles_len, "dlindex");
-      dlnew->verts = MEM_mallocN(sizeof(float[3]) * totvert, "dlverts");
-
-      /* vert data */
-      int i;
-      LISTBASE_FOREACH_INDEX (ScanFillVert *, sf_vert, &sf_ctx.fillvertbase, i) {
-        copy_v3_v3(&dlnew->verts[3 * i], sf_vert->co);
-        sf_vert->tmp.i = i; /* Index number. */
-      }
-
-      /* index data */
-      int *index = dlnew->index;
-      LISTBASE_FOREACH (ScanFillFace *, sf_tri, &sf_ctx.fillfacebase) {
-        index[0] = sf_tri->v1->tmp.i;
-        index[1] = flip_normal ? sf_tri->v3->tmp.i : sf_tri->v2->tmp.i;
-        index[2] = flip_normal ? sf_tri->v2->tmp.i : sf_tri->v3->tmp.i;
-        index += 3;
-      }
-
-      BLI_addhead(to, dlnew);
-    }
-    BLI_scanfill_end_arena(&sf_ctx, sf_arena);
-
-    if (nextcol) {
-      /* stay at current char but fill polys with next material */
-      colnr++;
-    }
-    else {
-      /* switch to next char and start filling from first material */
-      charidx++;
-      colnr = 0;
-    }
-  }
-
-  BLI_memarena_free(sf_arena);
-  /* do not free polys, needed for wireframe display */
-}
-
-static void bevels_to_filledpoly(const Curve *cu, ListBase *dispbase)
-{
-  ListBase front = {NULL, NULL};
-  ListBase back = {NULL, NULL};
-
-  LISTBASE_FOREACH (const DispList *, dl, dispbase) {
-    if (dl->type == DL_SURF) {
-      if ((dl->flag & DL_CYCL_V) && (dl->flag & DL_CYCL_U) == 0) {
-        if ((cu->flag & CU_BACK) && (dl->flag & DL_BACK_CURVE)) {
-          DispList *dlnew = MEM_callocN(sizeof(DispList), __func__);
-          BLI_addtail(&front, dlnew);
-          dlnew->verts = MEM_mallocN(sizeof(float[3]) * dl->parts, __func__);
-          dlnew->nr = dl->parts;
-          dlnew->parts = 1;
-          dlnew->type = DL_POLY;
-          dlnew->flag = DL_BACK_CURVE;
-          dlnew->col = dl->col;
-          dlnew->charidx = dl->charidx;
-
-          const float *old_verts = dl->verts;
-          float *new_verts = dlnew->verts;
-          for (int i = 0; i < dl->parts; i++) {
-            copy_v3_v3(new_verts, old_verts);
-            new_verts += 3;
-            old_verts += 3 * dl->nr;
-          }
-        }
-        if ((cu->flag & CU_FRONT) && (dl->flag & DL_FRONT_CURVE)) {
-          DispList *dlnew = MEM_callocN(sizeof(DispList), __func__);
-          BLI_addtail(&back, dlnew);
-          dlnew->verts = MEM_mallocN(sizeof(float[3]) * dl->parts, __func__);
-          dlnew->nr = dl->parts;
-          dlnew->parts = 1;
-          dlnew->type = DL_POLY;
-          dlnew->flag = DL_FRONT_CURVE;
-          dlnew->col = dl->col;
-          dlnew->charidx = dl->charidx;
-
-          const float *old_verts = dl->verts + 3 * (dl->nr - 1);
-          float *new_verts = dlnew->verts;
-          for (int i = 0; i < dl->parts; i++) {
-            copy_v3_v3(new_verts, old_verts);
-            new_verts += 3;
-            old_verts += 3 * dl->nr;
-          }
-        }
-      }
-    }
-  }
-
-  const float z_up[3] = {0.0f, 0.0f, -1.0f};
-  BKE_displist_fill(&front, dispbase, z_up, true);
-  BKE_displist_fill(&back, dispbase, z_up, false);
-
-  BKE_displist_free(&front);
-  BKE_displist_free(&back);
-
-  BKE_displist_fill(dispbase, dispbase, z_up, false);
-}
-
-static void curve_to_filledpoly(const Curve *cu, ListBase *dispbase)
-{
-  if (!CU_DO_2DFILL(cu)) {
-    return;
-  }
-
-  if (dispbase->first && ((DispList *)dispbase->first)->type == DL_SURF) {
-    bevels_to_filledpoly(cu, dispbase);
-  }
-  else {
-    const float z_up[3] = {0.0f, 0.0f, -1.0f};
-    BKE_displist_fill(dispbase, dispbase, z_up, false);
-  }
-}
-
-/* taper rules:
- * - only 1 curve
- * - first point left, last point right
- * - based on subdivided points in original curve, not on points in taper curve (still)
- */
-static float displist_calc_taper(Depsgraph *depsgraph,
-                                 const Scene *scene,
-                                 Object *taperobj,
-                                 float fac)
-{
-  DispList *dl;
-
-  if (taperobj == NULL || taperobj->type != OB_CURVE) {
-    return 1.0;
-  }
-
-  dl = taperobj->runtime.curve_cache ? taperobj->runtime.curve_cache->disp.first : NULL;
-  if (dl == NULL) {
-    BKE_displist_make_curveTypes(depsgraph, scene, taperobj, false, false);
-    dl = taperobj->runtime.curve_cache->disp.first;
-  }
-  if (dl) {
-    float minx, dx, *fp;
-    int a;
-
-    /* horizontal size */
-    minx = dl->verts[0];
-    dx = dl->verts[3 * (dl->nr - 1)] - minx;
-    if (dx > 0.0f) {
-      fp = dl->verts;
-      for (a = 0; a < dl->nr; a++, fp += 3) {
-        if ((fp[0] - minx) / dx >= fac) {
-          /* interpolate with prev */
-          if (a > 0) {
-            float fac1 = (fp[-3] - minx) / dx;
-            float fac2 = (fp[0] - minx) / dx;
-            if (fac1 != fac2) {
-              return fp[1] * (fac1 - fac) / (fac1 - fac2) + fp[-2] * (fac - fac2) / (fac1 - fac2);
-            }
-          }
-          return fp[1];
-        }
-      }
-      return fp[-2];  // last y coord
-    }
-  }
-
-  return 1.0;
-}
-
-float BKE_displist_calc_taper(
-    Depsgraph *depsgraph, const Scene *scene, Object *taperobj, int cur, int tot)
-{
-  float fac = ((float)cur) / (float)(tot - 1);
-
-  return displist_calc_taper(depsgraph, scene, taperobj, fac);
-}
-
-void BKE_displist_make_mball(Depsgraph *depsgraph, Scene *scene, Object *ob)
-{
-  if (!ob || ob->type != OB_MBALL) {
-    return;
-  }
-
-  if (ob == BKE_mball_basis_find(scene, ob)) {
-    if (ob->runtime.curve_cache) {
-      BKE_displist_free(&(ob->runtime.curve_cache->disp));
-    }
-    else {
-      ob->runtime.curve_cache = MEM_callocN(sizeof(CurveCache), "CurveCache for MBall");
-    }
-
-    BKE_mball_polygonize(depsgraph, scene, ob, &ob->runtime.curve_cache->disp);
-    BKE_mball_texspace_calc(ob);
-
-    object_deform_mball(ob, &ob->runtime.curve_cache->disp);
-
-    /* NOP for MBALLs anyway... */
-    boundbox_displist_object(ob);
-  }
-}
-
-void BKE_displist_make_mball_forRender(Depsgraph *depsgraph,
-                                       Scene *scene,
-                                       Object *ob,
-                                       ListBase *dispbase)
-{
-  BKE_mball_polygonize(depsgraph, scene, ob, dispbase);
-  BKE_mball_texspace_calc(ob);
-
-  object_deform_mball(ob, dispbase);
-}
-
-static ModifierData *curve_get_tessellate_point(const Scene *scene,
-                                                const Object *ob,
-                                                const bool for_render,
-                                                const bool editmode)
-{
-  VirtualModifierData virtualModifierData;
-  ModifierData *md = BKE_modifiers_get_virtual_modifierlist(ob, &virtualModifierData);
-  ModifierData *pretessellatePoint;
-  int required_mode;
-
-  if (for_render) {
-    required_mode = eModifierMode_Render;
-  }
-  else {
-    required_mode = eModifierMode_Realtime;
-  }
-
-  if (editmode) {
-    required_mode |= eModifierMode_Editmode;
-  }
-
-  pretessellatePoint = NULL;
-  for (; md; md = md->next) {
-    const ModifierTypeInfo *mti = BKE_modifier_get_info(md->type);
-
-    if (!BKE_modifier_is_enabled(scene, md, required_mode)) {
-      continue;
-    }
-    if (mti->type == eModifierTypeType_Constructive) {
-      return pretessellatePoint;
-    }
-
-    if (ELEM(md->type, eModifierType_Hook, eModifierType_Softbody, eModifierType_MeshDeform)) {
-      pretessellatePoint = md;
-
-      /* this modifiers are moving point of tessellation automatically
-       * (some of them even can't be applied on tessellated curve), set flag
-       * for information button in modifier's header
-       */
-      md->mode |= eModifierMode_ApplyOnSpline;
-    }
-    else if (md->mode & eModifierMode_ApplyOnSpline) {
-      pretessellatePoint = md;
-    }
-  }
-
-  return pretessellatePoint;
-}
-
-/* Return true if any modifier was applied. */
-bool BKE_curve_calc_modifiers_pre(Depsgraph *depsgraph,
-                                  const Scene *scene,
-                                  Object *ob,
-                                  ListBase *source_nurb,
-                                  ListBase *target_nurb,
-                                  const bool for_render)
-{
-  VirtualModifierData virtualModifierData;
-  ModifierData *md = BKE_modifiers_get_virtual_modifierlist(ob, &virtualModifierData);
-  ModifierData *pretessellatePoint;
-  Curve *cu = ob->data;
-  int numElems = 0, numVerts = 0;
-  const bool editmode = (!for_render && (cu->editnurb || cu->editfont));
-  ModifierApplyFlag apply_flag = 0;
-  float(*deformedVerts)[3] = NULL;
-  float *keyVerts = NULL;
-  int required_mode;
-  bool modified = false;
-
-  BKE_modifiers_clear_errors(ob);
-
-  if (editmode) {
-    apply_flag |= MOD_APPLY_USECACHE;
-  }
-  if (for_render) {
-    apply_flag |= MOD_APPLY_RENDER;
-    required_mode = eModifierMode_Render;
-  }
-  else {
-    required_mode = eModifierMode_Realtime;
-  }
-
-  const ModifierEvalContext mectx = {depsgraph, ob, apply_flag};
-
-  pretessellatePoint = curve_get_tessellate_point(scene, ob, for_render, editmode);
-
-  if (editmode) {
-    required_mode |= eModifierMode_Editmode;
-  }
-
-  if (!editmode) {
-    keyVerts = BKE_key_evaluate_object(ob, &numElems);
-
-    if (keyVerts) {
-      BLI_assert(BKE_keyblock_curve_element_count(source_nurb) == numElems);
-
-      /* split coords from key data, the latter also includes
-       * tilts, which is passed through in the modifier stack.
-       * this is also the reason curves do not use a virtual
-       * shape key modifier yet. */
-      deformedVerts = BKE_curve_nurbs_key_vert_coords_alloc(source_nurb, keyVerts, &numVerts);
-    }
-  }
-
-  if (pretessellatePoint) {
-    for (; md; md = md->next) {
-      const ModifierTypeInfo *mti = BKE_modifier_get_info(md->type);
-
-      if (!BKE_modifier_is_enabled(scene, md, required_mode)) {
-        continue;
-      }
-      if (mti->type != eModifierTypeType_OnlyDeform) {
-        continue;
-      }
-
-      if (!deformedVerts) {
-        deformedVerts = BKE_curve_nurbs_vert_coords_alloc(source_nurb, &numVerts);
-      }
-
-      mti->deformVerts(md, &mectx, NULL, deformedVerts, numVerts);
-      modified = true;
-
-      if (md == pretessellatePoint) {
-        break;
-      }
-    }
-  }
-
-  if (deformedVerts) {
-    BKE_curve_nurbs_vert_coords_apply(target_nurb, deformedVerts, false);
-    MEM_freeN(deformedVerts);
-  }
-  if (keyVerts) { /* these are not passed through modifier stack */
-    BKE_curve_nurbs_key_vert_tilts_apply(target_nurb, keyVerts);
-  }
-
-  if (keyVerts) {
-    MEM_freeN(keyVerts);
-  }
-  return modified;
-}
-
-static float (*displist_vert_coords_alloc(ListBase *dispbase, int *r_vert_len))[3]
-{
-  float(*allverts)[3], *fp;
-
-  *r_vert_len = 0;
-
-  LISTBASE_FOREACH (DispList *, dl, dispbase) {
-    *r_vert_len += (dl->type == DL_INDEX3) ? dl->nr : dl->parts * dl->nr;
-  }
-
-  allverts = MEM_mallocN(sizeof(float[3]) * (*r_vert_len), "displist_vert_coords_alloc allverts");
-  fp = (float *)allverts;
-  LISTBASE_FOREACH (DispList *, dl, dispbase) {
-    int ofs = 3 * ((dl->type == DL_INDEX3) ? dl->nr : dl->parts * dl->nr);
-    memcpy(fp, dl->verts, sizeof(float) * ofs);
-    fp += ofs;
-  }
-
-  return allverts;
-}
-
-static void displist_vert_coords_apply(ListBase *dispbase, const float (*allverts)[3])
-{
-  const float *fp;
-
-  fp = (float *)allverts;
-  LISTBASE_FOREACH (DispList *, dl, dispbase) {
-    int ofs = 3 * ((dl->type == DL_INDEX3) ? dl->nr : dl->parts * dl->nr);
-    memcpy(dl->verts, fp, sizeof(float) * ofs);
-    fp += ofs;
-  }
-}
-
-static void curve_calc_modifiers_post(Depsgraph *depsgraph,
-                                      const Scene *scene,
-                                      Object *ob,
-                                      ListBase *dispbase,
-                                      Mesh **r_final,
-                                      const bool for_render,
-                                      const bool force_mesh_conversion)
-{
-  VirtualModifierData virtualModifierData;
-  ModifierData *md = BKE_modifiers_get_virtual_modifierlist(ob, &virtualModifierData);
-  ModifierData *pretessellatePoint;
-  const Curve *cu = ob->data;
-  int required_mode = 0, totvert = 0;
-  const bool editmode = (!for_render && (cu->editnurb || cu->editfont));
-  Mesh *modified = NULL, *mesh_applied;
-  float(*vertCos)[3] = NULL;
-  int useCache = !for_render;
-  ModifierApplyFlag apply_flag = 0;
-
-  if (for_render) {
-    apply_flag |= MOD_APPLY_RENDER;
-    required_mode = eModifierMode_Render;
-  }
-  else {
-    required_mode = eModifierMode_Realtime;
-  }
-
-  const ModifierEvalContext mectx_deform = {
-      depsgraph, ob, editmode ? apply_flag | MOD_APPLY_USECACHE : apply_flag};
-  const ModifierEvalContext mectx_apply = {
-      depsgraph, ob, useCache ? apply_flag | MOD_APPLY_USECACHE : apply_flag};
-
-  pretessellatePoint = curve_get_tessellate_point(scene, ob, for_render, editmode);
-
-  if (editmode) {
-    required_mode |= eModifierMode_Editmode;
-  }
-
-  if (pretessellatePoint) {
-    md = pretessellatePoint->next;
-  }
-
-  if (r_final && *r_final) {
-    BKE_id_free(NULL, *r_final);
-  }
-
-  for (; md; md = md->next) {
-    const ModifierTypeInfo *mti = BKE_modifier_get_info(md->type);
-
-    if (!BKE_modifier_is_enabled(scene, md, required_mode)) {
-      continue;
-    }
-
-    /* If we need normals, no choice, have to convert to mesh now. */
-    bool need_normal = mti->dependsOnNormals != NULL && mti->dependsOnNormals(md);
-    /* XXX 2.8 : now that batch cache is stored inside the ob->data
-     * we need to create a Mesh for each curve that uses modifiers. */
-    if (modified == NULL /* && need_normal */) {
-      if (vertCos != NULL) {
-        displist_vert_coords_apply(dispbase, vertCos);
-      }
-
-      if (ELEM(ob->type, OB_CURVE, OB_FONT) && (cu->flag & CU_DEFORM_FILL)) {
-        curve_to_filledpoly(cu, dispbase);
-      }
-
-      modified = BKE_mesh_new_nomain_from_curve_displist(ob, dispbase);
-    }
-
-    if (mti->type == eModifierTypeType_OnlyDeform ||
-        (mti->type == eModifierTypeType_DeformOrConstruct && !modified)) {
-      if (modified) {
-        if (!vertCos) {
-          vertCos = BKE_mesh_vert_coords_alloc(modified, &totvert);
-        }
-        if (need_normal) {
-          BKE_mesh_ensure_normals(modified);
-        }
-        mti->deformVerts(md, &mectx_deform, modified, vertCos, totvert);
-      }
-      else {
-        if (!vertCos) {
-          vertCos = displist_vert_coords_alloc(dispbase, &totvert);
-        }
-        mti->deformVerts(md, &mectx_deform, NULL, vertCos, totvert);
-      }
-    }
-    else {
-      if (!r_final) {
-        /* makeDisplistCurveTypes could be used for beveling, where derived mesh
-         * is totally unnecessary, so we could stop modifiers applying
-         * when we found constructive modifier but derived mesh is unwanted result
-         */
-        break;
-      }
-
-      if (modified) {
-        if (vertCos) {
-          Mesh *temp_mesh = (Mesh *)BKE_id_copy_ex(
-              NULL, &modified->id, NULL, LIB_ID_COPY_LOCALIZE);
-          BKE_id_free(NULL, modified);
-          modified = temp_mesh;
-
-          BKE_mesh_vert_coords_apply(modified, vertCos);
-        }
-      }
-      else {
-        if (vertCos) {
-          displist_vert_coords_apply(dispbase, vertCos);
-        }
-
-        if (ELEM(ob->type, OB_CURVE, OB_FONT) && (cu->flag & CU_DEFORM_FILL)) {
-          curve_to_filledpoly(cu, dispbase);
-        }
-
-        modified = BKE_mesh_new_nomain_from_curve_displist(ob, dispbase);
-      }
-
-      if (vertCos) {
-        /* Vertex coordinates were applied to necessary data, could free it */
-        MEM_freeN(vertCos);
-        vertCos = NULL;
-      }
-
-      if (need_normal) {
-        BKE_mesh_ensure_normals(modified);
-      }
-      mesh_applied = mti->modifyMesh(md, &mectx_apply, modified);
-
-      if (mesh_applied) {
-        /* Modifier returned a new derived mesh */
-
-        if (modified && modified != mesh_applied) { /* Modifier  */
-          BKE_id_free(NULL, modified);
-        }
-        modified = mesh_applied;
-      }
-    }
-  }
-
-  if (vertCos) {
-    if (modified) {
-      Mesh *temp_mesh = (Mesh *)BKE_id_copy_ex(NULL, &modified->id, NULL, LIB_ID_COPY_LOCALIZE);
-      BKE_id_free(NULL, modified);
-      modified = temp_mesh;
-
-      BKE_mesh_vert_coords_apply(modified, vertCos);
-      BKE_mesh_calc_normals_mapping_simple(modified);
-
-      MEM_freeN(vertCos);
-    }
-    else {
-      displist_vert_coords_apply(dispbase, vertCos);
-      MEM_freeN(vertCos);
-      vertCos = NULL;
-    }
-  }
-
-  if (r_final) {
-    if (force_mesh_conversion && !modified) {
-      /* XXX 2.8 : This is a workaround for by some deeper technical debts:
-       * - DRW Batch cache is stored inside the ob->data.
-       * - Curve data is not COWed for instances that use different modifiers.
-       * This can causes the modifiers to be applied on all user of the same data-block
-       * (see T71055)
-       *
-       * The easy workaround is to force to generate a Mesh that will be used for display data
-       * since a Mesh output is already used for generative modifiers.
-       * However it does not fix problems with actual edit data still being shared.
-       *
-       * The right solution would be to COW the Curve data block at the input of the modifier
-       * stack just like what the mesh modifier does.
-       */
-      modified = BKE_mesh_new_nomain_from_curve_displist(ob, dispbase);
-    }
-
-    if (modified) {
-
-      /* XXX2.8(Sybren): make sure the face normals are recalculated as well */
-      BKE_mesh_ensure_normals(modified);
-
-      /* Special tweaks, needed since neither BKE_mesh_new_nomain_from_template() nor
-       * BKE_mesh_new_nomain_from_curve_displist() properly duplicate mat info...
-       */
-      BLI_strncpy(modified->id.name, cu->id.name, sizeof(modified->id.name));
-      *((short *)modified->id.name) = ID_ME;
-      MEM_SAFE_FREE(modified->mat);
-      /* Set flag which makes it easier to see what's going on in a debugger. */
-      modified->id.tag |= LIB_TAG_COPIED_ON_WRITE_EVAL_RESULT;
-      modified->mat = MEM_dupallocN(cu->mat);
-      modified->totcol = cu->totcol;
-
-      (*r_final) = modified;
-    }
-    else {
-      (*r_final) = NULL;
-    }
-  }
-  else if (modified != NULL) {
-    /* Pretty stupid to generate that whole mesh if it's unused, yet we have to free it. */
-    BKE_id_free(NULL, modified);
-  }
-}
-
-static void displist_surf_indices(DispList *dl)
-{
-  int a, b, p1, p2, p3, p4;
-  int *index;
-
-  dl->totindex = 0;
-
-  index = dl->index = MEM_mallocN(sizeof(int[4]) * (dl->parts + 1) * (dl->nr + 1),
-                                  "index array nurbs");
-
-  for (a = 0; a < dl->parts; a++) {
-
-    if (BKE_displist_surfindex_get(dl, a, &b, &p1, &p2, &p3, &p4) == 0) {
-      break;
-    }
-
-    for (; b < dl->nr; b++, index += 4) {
-      index[0] = p1;
-      index[1] = p2;
-      index[2] = p4;
-      index[3] = p3;
-
-      dl->totindex++;
-
-      p2 = p1;
-      p1++;
-      p4 = p3;
-      p3++;
-    }
-  }
-}
-
-void BKE_displist_make_surf(Depsgraph *depsgraph,
-                            const Scene *scene,
-                            Object *ob,
-                            ListBase *dispbase,
-                            Mesh **r_final,
-                            const bool for_render,
-                            const bool for_orco)
-{
-  ListBase nubase = {NULL, NULL};
-  Curve *cu = ob->data;
-  DispList *dl;
-  float *data;
-  int len;
-  bool force_mesh_conversion = false;
-
-  if (!for_render && cu->editnurb) {
-    BKE_nurbList_duplicate(&nubase, BKE_curve_editNurbs_get(cu));
-  }
-  else {
-    BKE_nurbList_duplicate(&nubase, &cu->nurb);
-  }
-
-  if (!for_orco) {
-    force_mesh_conversion = BKE_curve_calc_modifiers_pre(
-        depsgraph, scene, ob, &nubase, &nubase, for_render);
-  }
-
-  LISTBASE_FOREACH (Nurb *, nu, &nubase) {
-    if (!(for_render || nu->hide == 0) || !BKE_nurb_check_valid_uv(nu)) {
-      continue;
-    }
-
-    int resolu = nu->resolu, resolv = nu->resolv;
-
-    if (for_render) {
-      if (cu->resolu_ren) {
-        resolu = cu->resolu_ren;
-      }
-      if (cu->resolv_ren) {
-        resolv = cu->resolv_ren;
-      }
-    }
-
-    if (nu->pntsv == 1) {
-      len = SEGMENTSU(nu) * resolu;
-
-      dl = MEM_callocN(sizeof(DispList), "makeDispListsurf");
-      dl->verts = MEM_mallocN(len * sizeof(float[3]), "dlverts");
-
-      BLI_addtail(dispbase, dl);
-      dl->parts = 1;
-      dl->nr = len;
-      dl->col = nu->mat_nr;
-      dl->charidx = nu->charidx;
-
-      /* dl->rt will be used as flag for render face and */
-      /* CU_2D conflicts with R_NOPUNOFLIP */
-      dl->rt = nu->flag;
-
-      data = dl->verts;
-      if (nu->flagu & CU_NURB_CYCLIC) {
-        dl->type = DL_POLY;
-      }
-      else {
-        dl->type = DL_SEGM;
-      }
-
-      BKE_nurb_makeCurve(nu, data, NULL, NULL, NULL, resolu, sizeof(float[3]));
-    }
-    else {
-      len = (nu->pntsu * resolu) * (nu->pntsv * resolv);
-
-      dl = MEM_callocN(sizeof(DispList), "makeDispListsurf");
-      dl->verts = MEM_mallocN(len * sizeof(float[3]), "dlverts");
-      BLI_addtail(dispbase, dl);
-
-      dl->col = nu->mat_nr;
-      dl->charidx = nu->charidx;
-
-      /* dl->rt will be used as flag for render face and */
-      /* CU_2D conflicts with R_NOPUNOFLIP */
-      dl->rt = nu->flag;
-
-      data = dl->verts;
-      dl->type = DL_SURF;
-
-      dl->parts = (nu->pntsu * resolu); /* in reverse, because makeNurbfaces works that way */
-      dl->nr = (nu->pntsv * resolv);
-      if (nu->flagv & CU_NURB_CYCLIC) {
-        dl->flag |= DL_CYCL_U; /* reverse too! */
-      }
-      if (nu->flagu & CU_NURB_CYCLIC) {
-        dl->flag |= DL_CYCL_V;
-      }
-
-      BKE_nurb_makeFaces(nu, data, 0, resolu, resolv);
-
-      /* gl array drawing: using indices */
-      displist_surf_indices(dl);
-    }
-  }
-
-  if (!for_orco) {
-    BKE_nurbList_duplicate(&ob->runtime.curve_cache->deformed_nurbs, &nubase);
-    curve_calc_modifiers_post(
-        depsgraph, scene, ob, dispbase, r_final, for_render, force_mesh_conversion);
-  }
-
-  BKE_nurbList_free(&nubase);
-}
-
-static void rotateBevelPiece(const Curve *cu,
-                             const BevPoint *bevp,
-                             const BevPoint *nbevp,
-                             const DispList *dlb,
-                             const float bev_blend,
-                             const float widfac,
-                             const float radius_factor,
-                             float **r_data)
-{
-  float *data = *r_data;
-  const float *fp = dlb->verts;
-  for (int b = 0; b < dlb->nr; b++, fp += 3, data += 3) {
-    if (cu->flag & CU_3D) {
-      float vec[3], quat[4];
-
-      vec[0] = fp[1] + widfac;
-      vec[1] = fp[2];
-      vec[2] = 0.0;
-
-      if (nbevp == NULL) {
-        copy_v3_v3(data, bevp->vec);
-        copy_qt_qt(quat, bevp->quat);
-      }
-      else {
-        interp_v3_v3v3(data, bevp->vec, nbevp->vec, bev_blend);
-        interp_qt_qtqt(quat, bevp->quat, nbevp->quat, bev_blend);
-      }
-
-      mul_qt_v3(quat, vec);
-
-      data[0] += radius_factor * vec[0];
-      data[1] += radius_factor * vec[1];
-      data[2] += radius_factor * vec[2];
-    }
-    else {
-      float sina, cosa;
-
-      if (nbevp == NULL) {
-        copy_v3_v3(data, bevp->vec);
-        sina = bevp->sina;
-        cosa = bevp->cosa;
-      }
-      else {
-        interp_v3_v3v3(data, bevp->vec, nbevp->vec, bev_blend);
-
-        /* perhaps we need to interpolate angles instead. but the thing is
-         * cosa and sina are not actually sine and cosine
-         */
-        sina = nbevp->sina * bev_blend + bevp->sina * (1.0f - bev_blend);
-        cosa = nbevp->cosa * bev_blend + bevp->cosa * (1.0f - bev_blend);
-      }
-
-      data[0] += radius_factor * (widfac + fp[1]) * sina;
-      data[1] += radius_factor * (widfac + fp[1]) * cosa;
-      data[2] += radius_factor * fp[2];
-    }
-  }
-
-  *r_data = data;
-}
-
-static void fillBevelCap(const Nurb *nu,
-                         const DispList *dlb,
-                         const float *prev_fp,
-                         ListBase *dispbase)
-{
-  DispList *dl;
-
-  dl = MEM_callocN(sizeof(DispList), "makeDispListbev2");
-  dl->verts = MEM_mallocN(sizeof(float[3]) * dlb->nr, "dlverts");
-  memcpy(dl->verts, prev_fp, sizeof(float[3]) * dlb->nr);
-
-  dl->type = DL_POLY;
-
-  dl->parts = 1;
-  dl->nr = dlb->nr;
-  dl->col = nu->mat_nr;
-  dl->charidx = nu->charidx;
-
-  /* dl->rt will be used as flag for render face and */
-  /* CU_2D conflicts with R_NOPUNOFLIP */
-  dl->rt = nu->flag;
-
-  BLI_addtail(dispbase, dl);
-}
-
-static void calc_bevfac_segment_mapping(
-    const BevList *bl, float bevfac, float spline_length, int *r_bev, float *r_blend)
-{
-  float normlen, normsum = 0.0f;
-  float *seglen = bl->seglen;
-  int *segbevcount = bl->segbevcount;
-  int bevcount = 0, nr = bl->nr;
-
-  float bev_fl = bevfac * (bl->nr - 1);
-  *r_bev = (int)bev_fl;
-
-  while (bevcount < nr - 1) {
-    normlen = *seglen / spline_length;
-    if (normsum + normlen > bevfac) {
-      bev_fl = bevcount + (bevfac - normsum) / normlen * *segbevcount;
-      *r_bev = (int)bev_fl;
-      *r_blend = bev_fl - *r_bev;
-      break;
-    }
-    normsum += normlen;
-    bevcount += *segbevcount;
-    segbevcount++;
-    seglen++;
-  }
-}
-
-static void calc_bevfac_spline_mapping(
-    const BevList *bl, float bevfac, float spline_length, int *r_bev, float *r_blend)
-{
-  const float len_target = bevfac * spline_length;
-  BevPoint *bevp = bl->bevpoints;
-  float len_next = 0.0f, len = 0.0f;
-  int i = 0, nr = bl->nr;
-
-  while (nr--) {
-    bevp++;
-    len_next = len + bevp->offset;
-    if (len_next > len_target) {
-      break;
-    }
-    len = len_next;
-    i++;
-  }
-
-  *r_bev = i;
-  *r_blend = (len_target - len) / bevp->offset;
-}
-
-static void calc_bevfac_mapping_default(
-    const BevList *bl, int *r_start, float *r_firstblend, int *r_steps, float *r_lastblend)
-{
-  *r_start = 0;
-  *r_steps = bl->nr;
-  *r_firstblend = 1.0f;
-  *r_lastblend = 1.0f;
-}
-
-static void calc_bevfac_mapping(const Curve *cu,
-                                const BevList *bl,
-                                const Nurb *nu,
-                                int *r_start,
-                                float *r_firstblend,
-                                int *r_steps,
-                                float *r_lastblend)
-{
-  float tmpf, total_length = 0.0f;
-  int end = 0, i;
-
-  if ((BKE_nurb_check_valid_u(nu) == false) ||
-      /* not essential, but skips unnecessary calculation */
-      (min_ff(cu->bevfac1, cu->bevfac2) == 0.0f && max_ff(cu->bevfac1, cu->bevfac2) == 1.0f)) {
-    calc_bevfac_mapping_default(bl, r_start, r_firstblend, r_steps, r_lastblend);
-    return;
-  }
-
-  if (ELEM(cu->bevfac1_mapping, CU_BEVFAC_MAP_SEGMENT, CU_BEVFAC_MAP_SPLINE) ||
-      ELEM(cu->bevfac2_mapping, CU_BEVFAC_MAP_SEGMENT, CU_BEVFAC_MAP_SPLINE)) {
-    for (i = 0; i < SEGMENTSU(nu); i++) {
-      total_length += bl->seglen[i];
-    }
-  }
-
-  switch (cu->bevfac1_mapping) {
-    case CU_BEVFAC_MAP_RESOLU: {
-      const float start_fl = cu->bevfac1 * (bl->nr - 1);
-      *r_start = (int)start_fl;
-      *r_firstblend = 1.0f - (start_fl - (*r_start));
-      break;
-    }
-    case CU_BEVFAC_MAP_SEGMENT: {
-      calc_bevfac_segment_mapping(bl, cu->bevfac1, total_length, r_start, r_firstblend);
-      *r_firstblend = 1.0f - *r_firstblend;
-      break;
-    }
-    case CU_BEVFAC_MAP_SPLINE: {
-      calc_bevfac_spline_mapping(bl, cu->bevfac1, total_length, r_start, r_firstblend);
-      *r_firstblend = 1.0f - *r_firstblend;
-      break;
-    }
-  }
-
-  switch (cu->bevfac2_mapping) {
-    case CU_BEVFAC_MAP_RESOLU: {
-      const float end_fl = cu->bevfac2 * (bl->nr - 1);
-      end = (int)end_fl;
-
-      *r_steps = 2 + end - *r_start;
-      *r_lastblend = end_fl - end;
-      break;
-    }
-    case CU_BEVFAC_MAP_SEGMENT: {
-      calc_bevfac_segment_mapping(bl, cu->bevfac2, total_length, &end, r_lastblend);
-      *r_steps = end - *r_start + 2;
-      break;
-    }
-    case CU_BEVFAC_MAP_SPLINE: {
-      calc_bevfac_spline_mapping(bl, cu->bevfac2, total_length, &end, r_lastblend);
-      *r_steps = end - *r_start + 2;
-      break;
-    }
-  }
-
-  if (end < *r_start || (end == *r_start && *r_lastblend < 1.0f - *r_firstblend)) {
-    SWAP(int, *r_start, end);
-    tmpf = *r_lastblend;
-    *r_lastblend = 1.0f - *r_firstblend;
-    *r_firstblend = 1.0f - tmpf;
-    *r_steps = end - *r_start + 2;
-  }
-
-  if (*r_start + *r_steps > bl->nr) {
-    *r_steps = bl->nr - *r_start;
-    *r_lastblend = 1.0f;
-  }
-}
-
-static void do_makeDispListCurveTypes(Depsgraph *depsgraph,
-                                      const Scene *scene,
-                                      Object *ob,
-                                      ListBase *dispbase,
-                                      const bool for_render,
-                                      const bool for_orco,
-                                      Mesh **r_final)
-{
-  Curve *cu = ob->data;
-
-  /* we do allow duplis... this is only displist on curve level */
-  if (!ELEM(ob->type, OB_SURF, OB_CURVE, OB_FONT)) {
-    return;
-  }
-
-  if (ob->type == OB_SURF) {
-    BKE_displist_make_surf(depsgraph, scene, ob, dispbase, r_final, for_render, for_orco);
-  }
-  else if (ELEM(ob->type, OB_CURVE, OB_FONT)) {
-    ListBase dlbev;
-    ListBase nubase = {NULL, NULL};
-    bool force_mesh_conversion = false;
-
-    BKE_curve_bevelList_free(&ob->runtime.curve_cache->bev);
-
-    /* We only re-evaluate path if evaluation is not happening for orco.
-     * If the calculation happens for orco, we should never free data which
-     * was needed before and only not needed for orco calculation.
-     */
-    if (!for_orco) {
-      if (ob->runtime.curve_cache->anim_path_accum_length) {
-        MEM_freeN((void *)ob->runtime.curve_cache->anim_path_accum_length);
-      }
-      ob->runtime.curve_cache->anim_path_accum_length = NULL;
-    }
-
-    if (ob->type == OB_FONT) {
-      BKE_vfont_to_curve_nubase(ob, FO_EDIT, &nubase);
-    }
-    else {
-      BKE_nurbList_duplicate(&nubase, BKE_curve_nurbs_get(cu));
-    }
-
-    if (!for_orco) {
-      force_mesh_conversion = BKE_curve_calc_modifiers_pre(
-          depsgraph, scene, ob, &nubase, &nubase, for_render);
-    }
-
-    BKE_curve_bevelList_make(ob, &nubase, for_render);
-
-    /* If curve has no bevel will return nothing */
-    BKE_curve_bevel_make(ob, &dlbev);
-
-    /* no bevel or extrude, and no width correction? */
-    if (!dlbev.first && cu->width == 1.0f) {
-      curve_to_displist(cu, &nubase, for_render, dispbase);
-    }
-    else {
-      const float widfac = cu->width - 1.0f;
-      BevList *bl = ob->runtime.curve_cache->bev.first;
-      Nurb *nu = nubase.first;
-
-      for (; bl && nu; bl = bl->next, nu = nu->next) {
-        float *data;
-
-        if (bl->nr == 0) { /* blank bevel lists can happen */
-          continue;
-        }
-
-        /* exception handling; curve without bevel or extrude, with width correction */
-        if (BLI_listbase_is_empty(&dlbev)) {
-          DispList *dl = MEM_callocN(sizeof(DispList), "makeDispListbev");
-          dl->verts = MEM_mallocN(sizeof(float[3]) * bl->nr, "dlverts");
-          BLI_addtail(dispbase, dl);
-
-          if (bl->poly != -1) {
-            dl->type = DL_POLY;
-          }
-          else {
-            dl->type = DL_SEGM;
-            dl->flag = (DL_FRONT_CURVE | DL_BACK_CURVE);
-          }
-
-          dl->parts = 1;
-          dl->nr = bl->nr;
-          dl->col = nu->mat_nr;
-          dl->charidx = nu->charidx;
-
-          /* dl->rt will be used as flag for render face and */
-          /* CU_2D conflicts with R_NOPUNOFLIP */
-          dl->rt = nu->flag;
-
-          int a = dl->nr;
-          BevPoint *bevp = bl->bevpoints;
-          data = dl->verts;
-          while (a--) {
-            data[0] = bevp->vec[0] + widfac * bevp->sina;
-            data[1] = bevp->vec[1] + widfac * bevp->cosa;
-            data[2] = bevp->vec[2];
-            bevp++;
-            data += 3;
-          }
-        }
-        else {
-          ListBase bottom_capbase = {NULL, NULL};
-          ListBase top_capbase = {NULL, NULL};
-          float bottom_no[3] = {0.0f};
-          float top_no[3] = {0.0f};
-          float first_blend = 0.0f, last_blend = 0.0f;
-          int start, steps = 0;
-
-          if (nu->flagu & CU_NURB_CYCLIC) {
-            calc_bevfac_mapping_default(bl, &start, &first_blend, &steps, &last_blend);
-          }
-          else {
-            if (fabsf(cu->bevfac2 - cu->bevfac1) < FLT_EPSILON) {
-              continue;
-            }
-
-            calc_bevfac_mapping(cu, bl, nu, &start, &first_blend, &steps, &last_blend);
-          }
-
-          LISTBASE_FOREACH (DispList *, dlb, &dlbev) {
-            /* for each part of the bevel use a separate displblock */
-            DispList *dl = MEM_callocN(sizeof(DispList), "makeDispListbev1");
-            dl->verts = data = MEM_mallocN(sizeof(float[3]) * dlb->nr * steps, "dlverts");
-            BLI_addtail(dispbase, dl);
-
-            dl->type = DL_SURF;
-
-            dl->flag = dlb->flag & (DL_FRONT_CURVE | DL_BACK_CURVE);
-            if (dlb->type == DL_POLY) {
-              dl->flag |= DL_CYCL_U;
-            }
-            if ((bl->poly >= 0) && (steps > 2)) {
-              dl->flag |= DL_CYCL_V;
-            }
-
-            dl->parts = steps;
-            dl->nr = dlb->nr;
-            dl->col = nu->mat_nr;
-            dl->charidx = nu->charidx;
-
-            /* dl->rt will be used as flag for render face and */
-            /* CU_2D conflicts with R_NOPUNOFLIP */
-            dl->rt = nu->flag;
-
-            /* for each point of poly make a bevel piece */
-            BevPoint *bevp_first = bl->bevpoints;
-            BevPoint *bevp_last = &bl->bevpoints[bl->nr - 1];
-            BevPoint *bevp = &bl->bevpoints[start];
-            for (int i = start, a = 0; a < steps; i++, bevp++, a++) {
-              float radius_factor = 1.0;
-              float *cur_data = data;
-
-              if (cu->taperobj == NULL) {
-                radius_factor = bevp->radius;
-              }
-              else {
-                float taper_factor;
-                if (cu->flag & CU_MAP_TAPER) {
-                  float len = (steps - 3) + first_blend + last_blend;
-
-                  if (a == 0) {
-                    taper_factor = 0.0f;
-                  }
-                  else if (a == steps - 1) {
-                    taper_factor = 1.0f;
-                  }
-                  else {
-                    taper_factor = ((float)a - (1.0f - first_blend)) / len;
-                  }
-                }
-                else {
-                  float len = bl->nr - 1;
-                  taper_factor = (float)i / len;
-
-                  if (a == 0) {
-                    taper_factor += (1.0f - first_blend) / len;
-                  }
-                  else if (a == steps - 1) {
-                    taper_factor -= (1.0f - last_blend) / len;
-                  }
-                }
-
-                radius_factor = displist_calc_taper(depsgraph, scene, cu->taperobj, taper_factor);
-
-                if (cu->taper_radius_mode == CU_TAPER_RADIUS_MULTIPLY) {
-                  radius_factor *= bevp->radius;
-                }
-                else if (cu->taper_radius_mode == CU_TAPER_RADIUS_ADD) {
-                  radius_factor += bevp->radius;
-                }
-              }
-
-              /* rotate bevel piece and write in data */
-              if ((a == 0) && (bevp != bevp_last)) {
-                rotateBevelPiece(
-                    cu, bevp, bevp + 1, dlb, 1.0f - first_blend, widfac, radius_factor, &data);
-              }
-              else if ((a == steps - 1) && (bevp != bevp_first)) {
-                rotateBevelPiece(
-                    cu, bevp, bevp - 1, dlb, 1.0f - last_blend, widfac, radius_factor, &data);
-              }
-              else {
-                rotateBevelPiece(cu, bevp, NULL, dlb, 0.0f, widfac, radius_factor, &data);
-              }
-
-              if ((cu->flag & CU_FILL_CAPS) && !(nu->flagu & CU_NURB_CYCLIC)) {
-                if (a == 1) {
-                  fillBevelCap(nu, dlb, cur_data - 3 * dlb->nr, &bottom_capbase);
-                  copy_v3_v3(bottom_no, bevp->dir);
-                }
-                if (a == steps - 1) {
-                  fillBevelCap(nu, dlb, cur_data, &top_capbase);
-                  negate_v3_v3(top_no, bevp->dir);
-                }
-              }
-            }
-
-            /* gl array drawing: using indices */
-            displist_surf_indices(dl);
-          }
-
-          if (bottom_capbase.first) {
-            BKE_displist_fill(&bottom_capbase, dispbase, bottom_no, false);
-            BKE_displist_fill(&top_capbase, dispbase, top_no, false);
-            BKE_displist_free(&bottom_capbase);
-            BKE_displist_free(&top_capbase);
-          }
-        }
-      }
-      BKE_displist_free(&dlbev);
-    }
-
-    if (!(cu->flag & CU_DEFORM_FILL)) {
-      curve_to_filledpoly(cu, dispbase);
-    }
-
-    if (!for_orco) {
-      if ((cu->flag & CU_PATH) ||
-          DEG_get_eval_flags_for_id(depsgraph, &ob->id) & DAG_EVAL_NEED_CURVE_PATH) {
-        BKE_anim_path_calc_data(ob);
-      }
-
-      BKE_nurbList_duplicate(&ob->runtime.curve_cache->deformed_nurbs, &nubase);
-      curve_calc_modifiers_post(
-          depsgraph, scene, ob, dispbase, r_final, for_render, force_mesh_conversion);
-    }
-
-    if (cu->flag & CU_DEFORM_FILL && !ob->runtime.data_eval) {
-      curve_to_filledpoly(cu, dispbase);
-    }
-
-    BKE_nurbList_free(&nubase);
-  }
-}
-
-void BKE_displist_make_curveTypes(Depsgraph *depsgraph,
-                                  const Scene *scene,
-                                  Object *ob,
-                                  const bool for_render,
-                                  const bool for_orco)
-{
-  ListBase *dispbase;
-
-  /* The same check for duplis as in do_makeDispListCurveTypes.
-   * Happens when curve used for constraint/bevel was converted to mesh.
-   * check there is still needed for render displist and orco displists. */
-  if (!ELEM(ob->type, OB_SURF, OB_CURVE, OB_FONT)) {
-    return;
-  }
-
-  BKE_object_free_derived_caches(ob);
-
-  if (!ob->runtime.curve_cache) {
-    ob->runtime.curve_cache = MEM_callocN(sizeof(CurveCache), "CurveCache for curve types");
-  }
-
-  dispbase = &(ob->runtime.curve_cache->disp);
-
-  Mesh *mesh_eval = NULL;
-  do_makeDispListCurveTypes(depsgraph, scene, ob, dispbase, for_render, for_orco, &mesh_eval);
-
-  if (mesh_eval != NULL) {
-    BKE_object_eval_assign_data(ob, &mesh_eval->id, true);
-  }
-
-  boundbox_displist_object(ob);
-}
-
-void BKE_displist_make_curveTypes_forRender(Depsgraph *depsgraph,
-                                            const Scene *scene,
-                                            Object *ob,
-                                            ListBase *dispbase,
-                                            Mesh **r_final,
-                                            const bool for_orco)
-{
-  if (ob->runtime.curve_cache == NULL) {
-    ob->runtime.curve_cache = MEM_callocN(sizeof(CurveCache), "CurveCache for Curve");
-  }
-
-  do_makeDispListCurveTypes(depsgraph, scene, ob, dispbase, true, for_orco, r_final);
-}
-
-void BKE_displist_minmax(const ListBase *dispbase, float min[3], float max[3])
-{
-  const float *vert;
-  int a, tot = 0;
-  int doit = 0;
-
-  LISTBASE_FOREACH (const DispList *, dl, dispbase) {
-    tot = (dl->type == DL_INDEX3) ? dl->nr : dl->nr * dl->parts;
-    vert = dl->verts;
-    for (a = 0; a < tot; a++, vert += 3) {
-      minmax_v3v3_v3(min, max, vert);
-    }
-    doit |= (tot != 0);
-  }
-
-  if (!doit) {
-    /* there's no geometry in displist, use zero-sized boundbox */
-    zero_v3(min);
-    zero_v3(max);
-  }
-}
-
-/* this is confusing, there's also min_max_object, applying the obmat... */
-static void boundbox_displist_object(Object *ob)
-{
-  if (ELEM(ob->type, OB_CURVE, OB_SURF, OB_FONT)) {
-    /* Curve's BB is already calculated as a part of modifier stack,
-     * here we only calculate object BB based on final display list.
-     */
-
-    /* object's BB is calculated from final displist */
-    if (ob->runtime.bb == NULL) {
-      ob->runtime.bb = MEM_callocN(sizeof(BoundBox), "boundbox");
-    }
-
-    Mesh *mesh_eval = BKE_object_get_evaluated_mesh(ob);
-    if (mesh_eval) {
-      BKE_object_boundbox_calc_from_mesh(ob, mesh_eval);
-    }
-    else {
-      float min[3], max[3];
-
-      INIT_MINMAX(min, max);
-      BKE_displist_minmax(&ob->runtime.curve_cache->disp, min, max);
-      BKE_boundbox_init_from_minmax(ob->runtime.bb, min, max);
-
-      ob->runtime.bb->flag &= ~BOUNDBOX_DIRTY;
-    }
-  }
-}