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/**
* BME_customdata.c jan 2007
*
* Custom Data functions for Bmesh
*
* $Id$
*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* 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. The Blender
* Foundation also sells licenses for use in proprietary software under
* the Blender License. See http://www.blender.org/BL/ for information
* about this.
*
* 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) 2004 Blender Foundation.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): Geoffrey Bantle, Brecht Van Lommel, Ben Batt
*
* ***** END GPL LICENSE BLOCK *****
*/
#include <string.h>
#include "BKE_bmeshCustomData.h"
#include "bmesh_private.h"
#include "MEM_guardedalloc.h"
/********************* Layer type information **********************/
typedef struct BME_LayerTypeInfo {
int size;
char *defaultname;
void (*copy)(const void *source, void *dest, int count);
void (*free)(void *data, int count, int size);
void (*interp)(void **sources, float *weights, float *sub_weights, int count, void *dest);
void (*set_default)(void *data, int count);
} BME_LayerTypeInfo;
const BME_LayerTypeInfo BMELAYERTYPEINFO[BME_CD_NUMTYPES] = {
{sizeof(BME_facetex), "TexFace", NULL, NULL, NULL, NULL},
{sizeof(BME_looptex), "UV", NULL, NULL, NULL, NULL},
{sizeof(BME_loopcol), "VCol", NULL, NULL, NULL, NULL},
{sizeof(BME_DeformVert), "Group", NULL, NULL, NULL, NULL}
};
static const BME_LayerTypeInfo *BME_layerType_getInfo(int type)
{
if(type < 0 || type >= CD_NUMTYPES) return NULL;
return &BMELAYERTYPEINFO[type];
}
void BME_CD_Create(BME_CustomData *data, BME_CustomDataInit *init, int initalloc)
{
int i, j, offset=0;
const BME_LayerTypeInfo *info;
/*initialize data members*/
data->layers = NULL;
data->pool = NULL;
data->totlayer = 0;
data->totsize = 0;
/*first count how many layers to alloc*/
for(i=0; i < BME_CD_NUMTYPES; i++){
info = BME_layerType_getInfo(i);
data->totlayer += init->layout[i];
data->totsize += (init->layout[i] * info->size);
}
/*alloc our layers*/
if(data->totlayer){
/*alloc memory*/
data->layers = MEM_callocN(sizeof(BME_CustomDataLayer)*data->totlayer, "BMesh Custom Data Layers");
data->pool = BLI_mempool_create(data->totsize, initalloc, initalloc, 0);
/*initialize layer data*/
for(i=0; i < BME_CD_NUMTYPES; i++){
if(init->layout[i]){
info = BME_layerType_getInfo(i);
for(j=0; j < init->layout[i]; j++){
if(j==0) data->layers[j+i].active = init->active[i];
data->layers[j+i].type = i;
data->layers[j+i].offset = offset;
strcpy(data->layers[j+i].name, &(init->nametemplate[j+i]));
offset += info->size;
}
}
}
}
}
void BME_CD_Free(BME_CustomData *data)
{
if(data->pool) BLI_mempool_destroy(data->pool);
}
/*Block level ops*/
void BME_CD_free_block(BME_CustomData *data, void **block)
{
const BME_LayerTypeInfo *typeInfo;
int i;
if(!*block) return;
for(i = 0; i < data->totlayer; ++i) {
typeInfo = BME_layerType_getInfo(data->layers[i].type);
if(typeInfo->free) {
int offset = data->layers[i].offset;
typeInfo->free((char*)*block + offset, 1, typeInfo->size);
}
}
BLI_mempool_free(data->pool, *block);
*block = NULL;
}
static void BME_CD_alloc_block(BME_CustomData *data, void **block)
{
if (*block) BME_CD_free_block(data, block); //if we copy layers that have their own free functions like deformverts
if (data->totsize > 0)
*block = BLI_mempool_alloc(data->pool);
else
*block = NULL;
}
void BME_CD_copy_data(const BME_CustomData *source, BME_CustomData *dest,
void *src_block, void **dest_block)
{
const BME_LayerTypeInfo *typeInfo;
int dest_i, src_i;
if (!*dest_block) /*for addXXXlist functions!*/
BME_CD_alloc_block(dest, dest_block);
/* copies a layer at a time */
dest_i = 0;
for(src_i = 0; src_i < source->totlayer; ++src_i) {
/* find the first dest layer with type >= the source type
* (this should work because layers are ordered by type)
*/
while(dest_i < dest->totlayer
&& dest->layers[dest_i].type < source->layers[src_i].type)
++dest_i;
/* if there are no more dest layers, we're done */
if(dest_i >= dest->totlayer) return;
/* if we found a matching layer, copy the data */
if(dest->layers[dest_i].type == source->layers[src_i].type &&
strcmp(dest->layers[dest_i].name, source->layers[src_i].name) == 0) {
char *src_data = (char*)src_block + source->layers[src_i].offset;
char *dest_data = (char*)*dest_block + dest->layers[dest_i].offset;
typeInfo = BME_layerType_getInfo(source->layers[src_i].type);
if(typeInfo->copy)
typeInfo->copy(src_data, dest_data, 1);
else
memcpy(dest_data, src_data, typeInfo->size);
/* if there are multiple source & dest layers of the same type,
* we don't want to copy all source layers to the same dest, so
* increment dest_i
*/
++dest_i;
}
}
}
void BME_CD_set_default(BME_CustomData *data, void **block)
{
const BME_LayerTypeInfo *typeInfo;
int i;
if (!*block)
BME_CD_alloc_block(data, block); //for addXXXlist functions...
for(i = 0; i < data->totlayer; ++i) {
int offset = data->layers[i].offset;
typeInfo = BME_layerType_getInfo(data->layers[i].type);
if(typeInfo->set_default)
typeInfo->set_default((char*)*block + offset, 1);
}
}
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