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/* SPDX-License-Identifier: GPL-2.0-or-later */
/** \file
* \ingroup pythonintern
*
* This file defines a singleton py object accessed via 'bpy.utils.previews',
* which exposes low-level API for custom previews/icons.
* It is replaced in final API by an higher-level python wrapper, that handles previews by addon,
* and automatically release them on deletion.
*/
#include <Python.h>
#include <structmember.h>
#include "BLI_utildefines.h"
#include "RNA_access.h"
#include "RNA_prototypes.h"
#include "RNA_types.h"
#include "BPY_extern.h"
#include "bpy_rna.h"
#include "bpy_utils_previews.h"
#include "MEM_guardedalloc.h"
#include "IMB_imbuf.h"
#include "IMB_imbuf_types.h"
#include "IMB_thumbs.h"
#include "BKE_icons.h"
#include "DNA_ID.h"
#include "../generic/python_utildefines.h"
#define STR_SOURCE_TYPES "'IMAGE', 'MOVIE', 'BLEND', 'FONT'"
PyDoc_STRVAR(
bpy_utils_previews_new_doc,
".. method:: new(name)\n"
"\n"
" Generate a new empty preview.\n"
"\n"
" :arg name: The name (unique id) identifying the preview.\n"
" :type name: string\n"
" :return: The Preview matching given name, or a new empty one.\n"
" :rtype: :class:`bpy.types.ImagePreview`\n"
/* This is only true when accessed via 'bpy.utils.previews.ImagePreviewCollection.load',
* however this is the public API, allow this minor difference to the internal version here. */
" :raises KeyError: if ``name`` already exists.");
static PyObject *bpy_utils_previews_new(PyObject *UNUSED(self), PyObject *args)
{
char *name;
PreviewImage *prv;
PointerRNA ptr;
if (!PyArg_ParseTuple(args, "s:new", &name)) {
return NULL;
}
prv = BKE_previewimg_cached_ensure(name);
RNA_pointer_create(NULL, &RNA_ImagePreview, prv, &ptr);
return pyrna_struct_CreatePyObject(&ptr);
}
PyDoc_STRVAR(
bpy_utils_previews_load_doc,
".. method:: load(name, filepath, filetype, force_reload=False)\n"
"\n"
" Generate a new preview from given file path.\n"
"\n"
" :arg name: The name (unique id) identifying the preview.\n"
" :type name: string\n"
" :arg filepath: The file path to generate the preview from.\n"
" :type filepath: string\n"
" :arg filetype: The type of file, needed to generate the preview in [" STR_SOURCE_TYPES
"].\n"
" :type filetype: string\n"
" :arg force_reload: If True, force running thumbnail manager even if preview already "
"exists in cache.\n"
" :type force_reload: bool\n"
" :return: The Preview matching given name, or a new empty one.\n"
" :rtype: :class:`bpy.types.ImagePreview`\n"
/* This is only true when accessed via 'bpy.utils.previews.ImagePreviewCollection.load',
* however this is the public API, allow this minor difference to the internal version here. */
" :raises KeyError: if ``name`` already exists.");
static PyObject *bpy_utils_previews_load(PyObject *UNUSED(self), PyObject *args)
{
char *name, *path, *path_type_s;
int path_type, force_reload = false;
PreviewImage *prv;
PointerRNA ptr;
if (!PyArg_ParseTuple(args, "sss|p:load", &name, &path, &path_type_s, &force_reload)) {
return NULL;
}
if (STREQ(path_type_s, "IMAGE")) {
path_type = THB_SOURCE_IMAGE;
}
else if (STREQ(path_type_s, "MOVIE")) {
path_type = THB_SOURCE_MOVIE;
}
else if (STREQ(path_type_s, "BLEND")) {
path_type = THB_SOURCE_BLEND;
}
else if (STREQ(path_type_s, "FONT")) {
path_type = THB_SOURCE_FONT;
}
else {
PyErr_Format(PyExc_ValueError,
"load: invalid '%s' filetype, only [" STR_SOURCE_TYPES
"] "
"are supported",
path_type_s);
return NULL;
}
prv = BKE_previewimg_cached_thumbnail_read(name, path, path_type, force_reload);
RNA_pointer_create(NULL, &RNA_ImagePreview, prv, &ptr);
return pyrna_struct_CreatePyObject(&ptr);
}
PyDoc_STRVAR(bpy_utils_previews_release_doc,
".. method:: release(name)\n"
"\n"
" Release (free) a previously created preview.\n"
"\n"
"\n"
" :arg name: The name (unique id) identifying the preview.\n"
" :type name: string\n");
static PyObject *bpy_utils_previews_release(PyObject *UNUSED(self), PyObject *args)
{
char *name;
if (!PyArg_ParseTuple(args, "s:release", &name)) {
return NULL;
}
BKE_previewimg_cached_release(name);
Py_RETURN_NONE;
}
static struct PyMethodDef bpy_utils_previews_methods[] = {
/* Can't use METH_KEYWORDS alone, see http://bugs.python.org/issue11587 */
{"new", (PyCFunction)bpy_utils_previews_new, METH_VARARGS, bpy_utils_previews_new_doc},
{"load", (PyCFunction)bpy_utils_previews_load, METH_VARARGS, bpy_utils_previews_load_doc},
{"release",
(PyCFunction)bpy_utils_previews_release,
METH_VARARGS,
bpy_utils_previews_release_doc},
{NULL, NULL, 0, NULL},
};
PyDoc_STRVAR(
bpy_utils_previews_doc,
"This object contains basic static methods to handle cached (non-ID) previews in Blender\n"
"(low-level API, not exposed to final users).");
static struct PyModuleDef bpy_utils_previews_module = {
PyModuleDef_HEAD_INIT,
"bpy._utils_previews",
bpy_utils_previews_doc,
0,
bpy_utils_previews_methods,
NULL,
NULL,
NULL,
NULL,
};
PyObject *BPY_utils_previews_module(void)
{
PyObject *submodule;
submodule = PyModule_Create(&bpy_utils_previews_module);
return submodule;
}
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