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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.
*/
/** \file
* \ingroup imbuf
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "BLI_linklist.h"
#include "BLI_listbase.h" /* Needed due to import of BLO_readfile.h */
#include "BLI_utildefines.h"
#include "BLO_blend_defs.h"
#include "BLO_readfile.h"
#include "BKE_icons.h"
#include "BKE_idtype.h"
#include "BKE_main.h"
#include "DNA_ID.h" /* For preview images... */
#include "IMB_imbuf.h"
#include "IMB_imbuf_types.h"
#include "IMB_thumbs.h"
#include "MEM_guardedalloc.h"
ImBuf *IMB_thumb_load_blend(const char *blen_path, const char *blen_group, const char *blen_id)
{
ImBuf *ima = NULL;
if (blen_group && blen_id) {
LinkNode *ln, *names, *lp, *previews = NULL;
BlendFileReadReport bf_reports = {.reports = NULL};
struct BlendHandle *libfiledata = BLO_blendhandle_from_file(blen_path, &bf_reports);
int idcode = BKE_idtype_idcode_from_name(blen_group);
int i, nprevs, nnames;
if (libfiledata == NULL) {
return ima;
}
/* NOTE: we should handle all previews for a same group at once, would avoid reopening
* `.blend` file for each and every ID. However, this adds some complexity,
* so keep it for later. */
names = BLO_blendhandle_get_datablock_names(libfiledata, idcode, false, &nnames);
previews = BLO_blendhandle_get_previews(libfiledata, idcode, &nprevs);
BLO_blendhandle_close(libfiledata);
if (!previews || (nnames != nprevs)) {
if (previews != 0) {
/* No previews at all is not a bug! */
printf("%s: error, found %d items, %d previews\n", __func__, nnames, nprevs);
}
BLI_linklist_free(previews, BKE_previewimg_freefunc);
BLI_linklist_freeN(names);
return ima;
}
for (i = 0, ln = names, lp = previews; i < nnames; i++, ln = ln->next, lp = lp->next) {
const char *blockname = ln->link;
PreviewImage *img = lp->link;
if (STREQ(blockname, blen_id)) {
if (img) {
ima = BKE_previewimg_to_imbuf(img, ICON_SIZE_PREVIEW);
}
break;
}
}
BLI_linklist_free(previews, BKE_previewimg_freefunc);
BLI_linklist_freeN(names);
}
else {
BlendThumbnail *data;
data = BLO_thumbnail_from_file(blen_path);
ima = BKE_main_thumbnail_to_imbuf(NULL, data);
if (data) {
MEM_freeN(data);
}
}
return ima;
}
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