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blender-archive/source/blender/blenloader/intern/readfile_tempload.c
Sybren A. Stüvel 8ab52daa3a BLO: Functions for temporarily loading a single datablock
This introduces two functions to the blenloader module, here shown as
calls for brevity:

* `temp_lib_ctx = BLO_library_temp_load_id(real_main, blend_file_path, idcode, idname, reports);`
* Now the data in `temp_lib_ctx->temp_id` can be used (but ought not to
  be not assigned to non-temp datablocks).
* `BLO_library_temp_free(temp_lib_ctx);`

The first loads a datablock from a blend file, and returns it as part of
a `struct TempLibraryContext`. This struct contains the temp-loaded ID,
as well as enough information to correctly free everything again.

Differential Revision: https://developer.blender.org/D10736
2021-03-18 11:09:15 +01:00

59 lines
2.2 KiB
C

/*
* 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 blenloader
*/
#include "BLO_readfile.h"
#include "MEM_guardedalloc.h"
#include "BKE_report.h"
#include "DNA_ID.h"
TempLibraryContext *BLO_library_temp_load_id(struct Main *real_main,
const char *blend_file_path,
const short idcode,
const char *idname,
struct ReportList *reports)
{
TempLibraryContext *temp_lib_ctx = MEM_callocN(sizeof(*temp_lib_ctx), __func__);
temp_lib_ctx->blendhandle = BLO_blendhandle_from_file(blend_file_path, reports);
BLO_library_link_params_init(&temp_lib_ctx->liblink_params, real_main, 0, LIB_TAG_TEMP_MAIN);
temp_lib_ctx->temp_main = BLO_library_link_begin(
&temp_lib_ctx->blendhandle, blend_file_path, &temp_lib_ctx->liblink_params);
temp_lib_ctx->temp_id = BLO_library_link_named_part(temp_lib_ctx->temp_main,
&temp_lib_ctx->blendhandle,
idcode,
idname,
&temp_lib_ctx->liblink_params);
return temp_lib_ctx;
}
void BLO_library_temp_free(TempLibraryContext *temp_lib_ctx)
{
BLO_library_link_end(
temp_lib_ctx->temp_main, &temp_lib_ctx->blendhandle, &temp_lib_ctx->liblink_params);
BLO_blendhandle_close(temp_lib_ctx->blendhandle);
MEM_freeN(temp_lib_ctx);
}