Refactor: move defvert .blend IO to blenkernel

This is part of T76372.

source/blender/blenkernel/BKE_deform.h

@@ -35,6 +35,8 @@ struct MLoop;
 struct MPoly;
 struct Object;
 struct bDeformGroup;
+struct BlendWriter;
+struct BlendDataReader;
 
 struct bDeformGroup *BKE_object_defgroup_new(struct Object *ob, const char *name);
 void BKE_defgroup_copy_list(struct ListBase *lb1, const struct ListBase *lb2);
@@ -162,6 +164,11 @@ void BKE_defvert_extract_vgroup_to_polyweights(struct MDeformVert *dvert,
 
 void BKE_defvert_weight_to_rgb(float r_rgb[3], const float weight);
 
+void BKE_defvert_blend_write(struct BlendWriter *writer, int count, struct MDeformVert *dvlist);
+void BKE_defvert_blend_read(struct BlendDataReader *reader,
+                            int count,
+                            struct MDeformVert *mdverts);
+
 #ifdef __cplusplus
 }
 #endif

source/blender/blenkernel/intern/deform.c

@@ -50,6 +50,8 @@
 #include "BKE_object.h"
 #include "BKE_object_deform.h"
 
+#include "BLO_read_write.h"
+
 #include "data_transfer_intern.h"
 
 bDeformGroup *BKE_object_defgroup_new(Object *ob, const char *name)
@@ -1523,3 +1525,49 @@ void BKE_defvert_weight_to_rgb(float r_rgb[3], const float weight)
 }
 
 /** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name .blend file I/O
+ * \{ */
+
+void BKE_defvert_blend_write(BlendWriter *writer, int count, MDeformVert *dvlist)
+{
+  if (dvlist == NULL) {
+    return;
+  }
+
+  /* Write the dvert list */
+  BLO_write_struct_array(writer, MDeformVert, count, dvlist);
+
+  /* Write deformation data for each dvert */
+  for (int i = 0; i < count; i++) {
+    if (dvlist[i].dw) {
+      BLO_write_struct_array(writer, MDeformWeight, dvlist[i].totweight, dvlist[i].dw);
+    }
+  }
+}
+
+void BKE_defvert_blend_read(BlendDataReader *reader, int count, MDeformVert *mdverts)
+{
+  if (mdverts == NULL) {
+    return;
+  }
+
+  for (int i = count; i > 0; i--, mdverts++) {
+    /*convert to vgroup allocation system*/
+    MDeformWeight *dw;
+    if (mdverts->dw && (dw = BLO_read_get_new_data_address(reader, mdverts->dw))) {
+      const ssize_t dw_len = mdverts->totweight * sizeof(MDeformWeight);
+      void *dw_tmp = MEM_mallocN(dw_len, __func__);
+      memcpy(dw_tmp, dw, dw_len);
+      mdverts->dw = dw_tmp;
+      MEM_freeN(dw);
+    }
+    else {
+      mdverts->dw = NULL;
+      mdverts->totweight = 0;
+    }
+  }
+}
+
+/** \} */

source/blender/blenloader/intern/readfile.c

@@ -120,6 +120,7 @@
 #include "BKE_constraint.h"
 #include "BKE_curve.h"
 #include "BKE_curveprofile.h"
+#include "BKE_deform.h"
 #include "BKE_effect.h"
 #include "BKE_fcurve.h"
 #include "BKE_fcurve_driver.h"
@@ -4125,29 +4126,6 @@ static void lib_link_mesh(BlendLibReader *reader, Mesh *me)
   BLO_read_id_address(reader, me->id.lib, &me->texcomesh);
 }
 
-static void direct_link_dverts(BlendDataReader *reader, int count, MDeformVert *mdverts)
-{
-  if (mdverts == NULL) {
-    return;
-  }
-
-  for (int i = count; i > 0; i--, mdverts++) {
-    /*convert to vgroup allocation system*/
-    MDeformWeight *dw;
-    if (mdverts->dw && (dw = BLO_read_get_new_data_address(reader, mdverts->dw))) {
-      const ssize_t dw_len = mdverts->totweight * sizeof(MDeformWeight);
-      void *dw_tmp = MEM_mallocN(dw_len, "direct_link_dverts");
-      memcpy(dw_tmp, dw, dw_len);
-      mdverts->dw = dw_tmp;
-      MEM_freeN(dw);
-    }
-    else {
-      mdverts->dw = NULL;
-      mdverts->totweight = 0;
-    }
-  }
-}
-
 static void direct_link_mdisps(BlendDataReader *reader, int count, MDisps *mdisps, int external)
 {
   if (mdisps) {
@@ -4251,9 +4229,9 @@ static void direct_link_mesh(BlendDataReader *reader, Mesh *mesh)
   BLO_read_data_address(reader, &mesh->adt);
   BKE_animdata_blend_read_data(reader, mesh->adt);
 
-  /* Normally direct_link_dverts should be called in direct_link_customdata,
+  /* Normally BKE_defvert_blend_read should be called in direct_link_customdata,
    * but for backwards compatibility in do_versions to work we do it here. */
-  direct_link_dverts(reader, mesh->totvert, mesh->dvert);
+  BKE_defvert_blend_read(reader, mesh->totvert, mesh->dvert);
 
   direct_link_customdata(reader, &mesh->vdata, mesh->totvert);
   direct_link_customdata(reader, &mesh->edata, mesh->totedge);
@@ -4277,7 +4255,8 @@ static void direct_link_mesh(BlendDataReader *reader, Mesh *mesh)
     MultiresLevel *lvl = mesh->mr->levels.first;
 
     direct_link_customdata(reader, &mesh->mr->vdata, lvl->totvert);
-    direct_link_dverts(reader, lvl->totvert, CustomData_get(&mesh->mr->vdata, 0, CD_MDEFORMVERT));
+    BKE_defvert_blend_read(
+        reader, lvl->totvert, CustomData_get(&mesh->mr->vdata, 0, CD_MDEFORMVERT));
     direct_link_customdata(reader, &mesh->mr->fdata, lvl->totface);
 
     BLO_read_data_address(reader, &mesh->mr->edge_flags);
@@ -4338,7 +4317,7 @@ static void direct_link_latt(BlendDataReader *reader, Lattice *lt)
   BLO_read_data_address(reader, &lt->def);
 
   BLO_read_data_address(reader, &lt->dvert);
-  direct_link_dverts(reader, lt->pntsu * lt->pntsv * lt->pntsw, lt->dvert);
+  BKE_defvert_blend_read(reader, lt->pntsu * lt->pntsv * lt->pntsw, lt->dvert);
 
   lt->editlatt = NULL;
   lt->batch_cache = NULL;
@@ -6202,7 +6181,7 @@ static void direct_link_gpencil(BlendDataReader *reader, bGPdata *gpd)
         /* relink weight data */
         if (gps->dvert) {
           BLO_read_data_address(reader, &gps->dvert);
-          direct_link_dverts(reader, gps->totpoints, gps->dvert);
+          BKE_defvert_blend_read(reader, gps->totpoints, gps->dvert);
         }
       }
     }

source/blender/blenloader/intern/writefile.c

@@ -161,6 +161,7 @@
 #include "BKE_constraint.h"
 #include "BKE_curve.h"
 #include "BKE_curveprofile.h"
+#include "BKE_deform.h"
 #include "BKE_fcurve.h"
 #include "BKE_fcurve_driver.h"
 #include "BKE_global.h"  // for G
@@ -1784,22 +1785,6 @@ static void write_curve(BlendWriter *writer, Curve *cu, const void *id_address)
   }
 }
 
-static void write_dverts(BlendWriter *writer, int count, MDeformVert *dvlist)
-{
-  if (dvlist) {
-
-    /* Write the dvert list */
-    BLO_write_struct_array(writer, MDeformVert, count, dvlist);
-
-    /* Write deformation data for each dvert */
-    for (int i = 0; i < count; i++) {
-      if (dvlist[i].dw) {
-        BLO_write_struct_array(writer, MDeformWeight, dvlist[i].totweight, dvlist[i].dw);
-      }
-    }
-  }
-}
-
 static void write_mdisps(BlendWriter *writer, int count, MDisps *mdlist, int external)
 {
   if (mdlist) {
@@ -1854,7 +1839,7 @@ static void write_customdata(BlendWriter *writer,
 
     if (layer->type == CD_MDEFORMVERT) {
       /* layer types that allocate own memory need special handling */
-      write_dverts(writer, count, layer->data);
+      BKE_defvert_blend_write(writer, count, layer->data);
     }
     else if (layer->type == CD_MDISPS) {
       write_mdisps(writer, count, layer->data, layer->flag & CD_FLAG_EXTERNAL);
@@ -1974,7 +1959,7 @@ static void write_lattice(BlendWriter *writer, Lattice *lt, const void *id_addre
     /* direct data */
     BLO_write_struct_array(writer, BPoint, lt->pntsu * lt->pntsv * lt->pntsw, lt->def);
 
-    write_dverts(writer, lt->pntsu * lt->pntsv * lt->pntsw, lt->dvert);
+    BKE_defvert_blend_write(writer, lt->pntsu * lt->pntsv * lt->pntsw, lt->dvert);
   }
 }
 
@@ -2529,7 +2514,7 @@ static void write_gpencil(BlendWriter *writer, bGPdata *gpd, const void *id_addr
         LISTBASE_FOREACH (bGPDstroke *, gps, &gpf->strokes) {
           BLO_write_struct_array(writer, bGPDspoint, gps->totpoints, gps->points);
           BLO_write_struct_array(writer, bGPDtriangle, gps->tot_triangles, gps->triangles);
-          write_dverts(writer, gps->totpoints, gps->dvert);
+          BKE_defvert_blend_write(writer, gps->totpoints, gps->dvert);
         }
       }
     }