337 lines
11 KiB
C
337 lines
11 KiB
C
/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Contributor(s): Campbell Barton
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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/** \file blender/python/intern/bpy_app_handlers.c
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* \ingroup pythonintern
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*
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* This file defines a 'PyStructSequence' accessed via 'bpy.app.handlers',
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* which exposes various lists that the script author can add callback
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* functions into (called via blenders generic BLI_cb api)
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*/
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#include <Python.h>
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#include "BLI_utildefines.h"
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#include "BLI_callbacks.h"
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#include "RNA_types.h"
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#include "RNA_access.h"
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#include "bpy_rna.h"
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#include "bpy_app_handlers.h"
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#include "../generic/python_utildefines.h"
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#include "BPY_extern.h"
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void bpy_app_generic_callback(struct Main *main, struct ID *id, void *arg);
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static PyTypeObject BlenderAppCbType;
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static PyStructSequence_Field app_cb_info_fields[] = {
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{(char *)"frame_change_pre", (char *)"on frame change for playback and rendering (before)"},
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{(char *)"frame_change_post", (char *)"on frame change for playback and rendering (after)"},
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{(char *)"render_pre", (char *)"on render (before)"},
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{(char *)"render_post", (char *)"on render (after)"},
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{(char *)"render_write", (char *)"on writing a render frame (directly after the frame is written)"},
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{(char *)"render_stats", (char *)"on printing render statistics"},
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{(char *)"render_init", (char *)"on initialization of a render job"},
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{(char *)"render_complete", (char *)"on completion of render job"},
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{(char *)"render_cancel", (char *)"on canceling a render job"},
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{(char *)"load_pre", (char *)"on loading a new blend file (before)"},
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{(char *)"load_post", (char *)"on loading a new blend file (after)"},
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{(char *)"save_pre", (char *)"on saving a blend file (before)"},
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{(char *)"save_post", (char *)"on saving a blend file (after)"},
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{(char *)"game_pre", (char *)"on starting the game engine"},
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{(char *)"game_post", (char *)"on ending the game engine"},
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{(char *)"version_update", (char *)"on ending the versioning code"},
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/* sets the permanent tag */
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# define APP_CB_OTHER_FIELDS 1
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{(char *)"persistent", (char *)"Function decorator for callback functions not to be removed when loading new files"},
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{NULL}
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};
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static PyStructSequence_Desc app_cb_info_desc = {
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(char *)"bpy.app.handlers", /* name */
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(char *)"This module contains callback lists", /* doc */
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app_cb_info_fields, /* fields */
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ARRAY_SIZE(app_cb_info_fields) - 1
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};
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#if 0
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# if (BLI_CB_EVT_TOT != ARRAY_SIZE(app_cb_info_fields))
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# error "Callbacks are out of sync"
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# endif
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#endif
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/* --------------------------------------------------------------------------*/
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/* permanent tagging code */
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#define PERMINENT_CB_ID "_bpy_persistent"
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static PyObject *bpy_app_handlers_persistent_new(PyTypeObject *UNUSED(type), PyObject *args, PyObject *UNUSED(kwds))
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{
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PyObject *value;
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if (!PyArg_ParseTuple(args, "O:bpy.app.handlers.persistent", &value))
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return NULL;
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if (PyFunction_Check(value)) {
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PyObject **dict_ptr = _PyObject_GetDictPtr(value);
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if (dict_ptr == NULL) {
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PyErr_SetString(PyExc_ValueError,
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"bpy.app.handlers.persistent wasn't able to "
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"get the dictionary from the function passed");
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return NULL;
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}
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else {
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/* set id */
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if (*dict_ptr == NULL) {
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*dict_ptr = PyDict_New();
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}
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PyDict_SetItemString(*dict_ptr, PERMINENT_CB_ID, Py_None);
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}
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Py_INCREF(value);
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return value;
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}
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else {
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PyErr_SetString(PyExc_ValueError,
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"bpy.app.handlers.persistent expected a function");
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return NULL;
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}
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}
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/* dummy type because decorators can't be PyCFunctions */
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static PyTypeObject BPyPersistent_Type = {
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#if defined(_MSC_VER)
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PyVarObject_HEAD_INIT(NULL, 0)
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#else
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PyVarObject_HEAD_INIT(&PyType_Type, 0)
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#endif
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"persistent", /* tp_name */
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0, /* tp_basicsize */
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0, /* tp_itemsize */
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/* methods */
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0, /* tp_dealloc */
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0, /* tp_print */
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0, /* tp_getattr */
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0, /* tp_setattr */
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0, /* tp_reserved */
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0, /* tp_repr */
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0, /* tp_as_number */
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0, /* tp_as_sequence */
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0, /* tp_as_mapping */
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0, /* tp_hash */
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0, /* tp_call */
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0, /* tp_str */
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0, /* tp_getattro */
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0, /* tp_setattro */
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0, /* tp_as_buffer */
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Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
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Py_TPFLAGS_BASETYPE, /* tp_flags */
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0, /* tp_doc */
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0, /* tp_traverse */
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0, /* tp_clear */
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0, /* tp_richcompare */
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0, /* tp_weaklistoffset */
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0, /* tp_iter */
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0, /* tp_iternext */
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0, /* tp_methods */
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0, /* tp_members */
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0, /* tp_getset */
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0, /* tp_base */
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0, /* tp_dict */
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0, /* tp_descr_get */
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0, /* tp_descr_set */
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0, /* tp_dictoffset */
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0, /* tp_init */
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0, /* tp_alloc */
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bpy_app_handlers_persistent_new, /* tp_new */
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0, /* tp_free */
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};
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static PyObject *py_cb_array[BLI_CB_EVT_TOT] = {NULL};
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static PyObject *make_app_cb_info(void)
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{
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PyObject *app_cb_info;
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int pos;
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app_cb_info = PyStructSequence_New(&BlenderAppCbType);
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if (app_cb_info == NULL) {
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return NULL;
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}
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for (pos = 0; pos < BLI_CB_EVT_TOT; pos++) {
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if (app_cb_info_fields[pos].name == NULL) {
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Py_FatalError("invalid callback slots 1");
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}
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PyStructSequence_SET_ITEM(app_cb_info, pos, (py_cb_array[pos] = PyList_New(0)));
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}
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if (app_cb_info_fields[pos + APP_CB_OTHER_FIELDS].name != NULL) {
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Py_FatalError("invalid callback slots 2");
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}
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/* custom function */
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PyStructSequence_SET_ITEM(app_cb_info, pos++, (PyObject *)&BPyPersistent_Type);
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return app_cb_info;
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}
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PyObject *BPY_app_handlers_struct(void)
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{
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PyObject *ret;
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#if defined(_MSC_VER)
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BPyPersistent_Type.ob_base.ob_base.ob_type = &PyType_Type;
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#endif
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if (PyType_Ready(&BPyPersistent_Type) < 0) {
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BLI_assert(!"error initializing 'bpy.app.handlers.persistent'");
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}
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PyStructSequence_InitType(&BlenderAppCbType, &app_cb_info_desc);
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ret = make_app_cb_info();
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/* prevent user from creating new instances */
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BlenderAppCbType.tp_init = NULL;
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BlenderAppCbType.tp_new = NULL;
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BlenderAppCbType.tp_hash = (hashfunc)_Py_HashPointer; /* without this we can't do set(sys.modules) [#29635] */
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/* assign the C callbacks */
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if (ret) {
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static bCallbackFuncStore funcstore_array[BLI_CB_EVT_TOT] = {{NULL}};
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bCallbackFuncStore *funcstore;
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int pos = 0;
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for (pos = 0; pos < BLI_CB_EVT_TOT; pos++) {
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funcstore = &funcstore_array[pos];
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funcstore->func = bpy_app_generic_callback;
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funcstore->alloc = 0;
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funcstore->arg = SET_INT_IN_POINTER(pos);
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BLI_callback_add(funcstore, pos);
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}
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}
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return ret;
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}
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void BPY_app_handlers_reset(const short do_all)
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{
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PyGILState_STATE gilstate;
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int pos = 0;
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gilstate = PyGILState_Ensure();
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if (do_all) {
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for (pos = 0; pos < BLI_CB_EVT_TOT; pos++) {
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/* clear list */
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PyList_SetSlice(py_cb_array[pos], 0, PY_SSIZE_T_MAX, NULL);
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}
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}
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else {
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/* save string conversion thrashing */
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PyObject *perm_id_str = PyUnicode_FromString(PERMINENT_CB_ID);
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for (pos = 0; pos < BLI_CB_EVT_TOT; pos++) {
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/* clear only items without PERMINENT_CB_ID */
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PyObject *ls = py_cb_array[pos];
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Py_ssize_t i;
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PyObject *item;
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PyObject **dict_ptr;
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for (i = PyList_GET_SIZE(ls) - 1; i >= 0; i--) {
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if ((PyFunction_Check((item = PyList_GET_ITEM(ls, i)))) &&
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(dict_ptr = _PyObject_GetDictPtr(item)) &&
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(*dict_ptr) &&
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(PyDict_GetItem(*dict_ptr, perm_id_str) != NULL))
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{
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/* keep */
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}
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else {
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/* remove */
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/* PySequence_DelItem(ls, i); */ /* more obvious buw slower */
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PyList_SetSlice(ls, i, i + 1, NULL);
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}
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}
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}
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Py_DECREF(perm_id_str);
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}
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PyGILState_Release(gilstate);
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}
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/* the actual callback - not necessarily called from py */
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void bpy_app_generic_callback(struct Main *UNUSED(main), struct ID *id, void *arg)
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{
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PyObject *cb_list = py_cb_array[GET_INT_FROM_POINTER(arg)];
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if (PyList_GET_SIZE(cb_list) > 0) {
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PyGILState_STATE gilstate = PyGILState_Ensure();
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PyObject *args = PyTuple_New(1); /* save python creating each call */
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PyObject *func;
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PyObject *ret;
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Py_ssize_t pos;
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/* setup arguments */
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if (id) {
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PointerRNA id_ptr;
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RNA_id_pointer_create(id, &id_ptr);
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PyTuple_SET_ITEM(args, 0, pyrna_struct_CreatePyObject(&id_ptr));
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}
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else {
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PyTuple_SET_ITEM(args, 0, Py_INCREF_RET(Py_None));
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}
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/* Iterate the list and run the callbacks
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* note: don't store the list size since the scripts may remove themselves */
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for (pos = 0; pos < PyList_GET_SIZE(cb_list); pos++) {
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func = PyList_GET_ITEM(cb_list, pos);
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ret = PyObject_Call(func, args, NULL);
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if (ret == NULL) {
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/* Don't set last system variables because they might cause some
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* dangling pointers to external render engines (when exception
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* happens during rendering) which will break logic of render pipeline
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* which expects to be the only user of render engine when rendering
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* is finished.
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*/
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PyErr_PrintEx(0);
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PyErr_Clear();
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}
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else {
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Py_DECREF(ret);
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}
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}
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Py_DECREF(args);
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PyGILState_Release(gilstate);
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}
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}
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