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|
/*
* ***** 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.
*
* 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.
*
* Contributor(s): Michel Selten, Willian P. Germano, Stephen Swaney,
* Chris Keith, Chris Want, Ken Hughes, Campbell Barton
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/python/intern/bpy_interface.c
* \ingroup pythonintern
*
* This file deals with embedding the python interpreter within blender,
* starting and stopping python and exposing blender/python modules so they can
* be accesses from scripts.
*/
/* grr, python redefines */
#ifdef _POSIX_C_SOURCE
# undef _POSIX_C_SOURCE
#endif
#include <Python.h>
#include "MEM_guardedalloc.h"
#include "RNA_types.h"
#include "bpy.h"
#include "gpu.h"
#include "bpy_rna.h"
#include "bpy_util.h"
#include "bpy_traceback.h"
#include "bpy_intern_string.h"
#include "DNA_space_types.h"
#include "DNA_text_types.h"
#include "BLI_path_util.h"
#include "BLI_fileops.h"
#include "BLI_math_base.h"
#include "BLI_string.h"
#include "BLI_string_utf8.h"
#include "BLI_utildefines.h"
#include "BLI_threads.h"
#include "BKE_context.h"
#include "BKE_text.h"
#include "BKE_main.h"
#include "BKE_global.h" /* only for script checking */
#include "CCL_api.h"
#include "BPY_extern.h"
#include "../generic/bpy_internal_import.h" // our own imports
#include "../generic/py_capi_utils.h"
/* inittab initialization functions */
#include "../generic/bgl.h"
#include "../generic/blf_py_api.h"
#include "../generic/idprop_py_api.h"
#include "../bmesh/bmesh_py_api.h"
#include "../mathutils/mathutils.h"
/* for internal use, when starting and ending python scripts */
/* in case a python script triggers another python call, stop bpy_context_clear from invalidating */
static int py_call_level = 0;
BPy_StructRNA *bpy_context_module = NULL; /* for fast access */
// #define TIME_PY_RUN // simple python tests. prints on exit.
#ifdef TIME_PY_RUN
#include "PIL_time.h"
static int bpy_timer_count = 0;
static double bpy_timer; /* time since python starts */
static double bpy_timer_run; /* time for each python script run */
static double bpy_timer_run_tot; /* accumulate python runs */
#endif
/* use for updating while a python script runs - in case of file load */
void BPY_context_update(bContext *C)
{
/* don't do this from a non-main (e.g. render) thread, it can cause a race
* condition on C->data.recursion. ideal solution would be to disable
* context entirely from non-main threads, but that's more complicated */
if (!BLI_thread_is_main())
return;
BPy_SetContext(C);
bpy_import_main_set(CTX_data_main(C));
BPY_modules_update(C); /* can give really bad results if this isn't here */
}
void bpy_context_set(bContext *C, PyGILState_STATE *gilstate)
{
py_call_level++;
if (gilstate)
*gilstate = PyGILState_Ensure();
if (py_call_level == 1) {
BPY_context_update(C);
#ifdef TIME_PY_RUN
if (bpy_timer_count == 0) {
/* record time from the beginning */
bpy_timer = PIL_check_seconds_timer();
bpy_timer_run = bpy_timer_run_tot = 0.0;
}
bpy_timer_run = PIL_check_seconds_timer();
bpy_timer_count++;
#endif
}
}
/* context should be used but not now because it causes some bugs */
void bpy_context_clear(bContext *UNUSED(C), PyGILState_STATE *gilstate)
{
py_call_level--;
if (gilstate)
PyGILState_Release(*gilstate);
if (py_call_level < 0) {
fprintf(stderr, "ERROR: Python context internal state bug. this should not happen!\n");
}
else if (py_call_level == 0) {
/* XXX - Calling classes currently wont store the context :\,
* cant set NULL because of this. but this is very flakey still. */
#if 0
BPy_SetContext(NULL);
bpy_import_main_set(NULL);
#endif
#ifdef TIME_PY_RUN
bpy_timer_run_tot += PIL_check_seconds_timer() - bpy_timer_run;
bpy_timer_count++;
#endif
}
}
void BPY_text_free_code(Text *text)
{
if (text->compiled) {
Py_DECREF((PyObject *)text->compiled);
text->compiled = NULL;
}
}
void BPY_modules_update(bContext *C)
{
#if 0 // slow, this runs all the time poll, draw etc 100's of time a sec.
PyObject *mod = PyImport_ImportModuleLevel("bpy", NULL, NULL, NULL, 0);
PyModule_AddObject(mod, "data", BPY_rna_module());
PyModule_AddObject(mod, "types", BPY_rna_types()); // atm this does not need updating
#endif
/* refreshes the main struct */
BPY_update_rna_module();
if (bpy_context_module)
bpy_context_module->ptr.data = (void *)C;
}
void BPY_context_set(bContext *C)
{
BPy_SetContext(C);
}
/* defined in AUD_C-API.cpp */
extern PyObject *AUD_initPython(void);
#ifdef WITH_CYCLES
/* defined in cycles module */
static PyObject *CCL_initPython(void)
{
return (PyObject *)CCL_python_module_init();
}
#endif
static struct _inittab bpy_internal_modules[] = {
{(char *)"mathutils", PyInit_mathutils},
// {(char *)"mathutils.geometry", PyInit_mathutils_geometry},
// {(char *)"mathutils.noise", PyInit_mathutils_noise},
{(char *)"bgl", BPyInit_bgl},
{(char *)"blf", BPyInit_blf},
{(char *)"bmesh", BPyInit_bmesh},
// {(char *)"bmesh.types", BPyInit_bmesh_types},
// {(char *)"bmesh.utils", BPyInit_bmesh_utils},
#ifdef WITH_AUDASPACE
{(char *)"aud", AUD_initPython},
#endif
#ifdef WITH_CYCLES
{(char *)"_cycles", CCL_initPython},
#endif
{(char *)"gpu", GPU_initPython},
{(char *)"idprop", BPyInit_idprop},
{NULL, NULL}
};
/* call BPY_context_set first */
void BPY_python_start(int argc, const char **argv)
{
#ifndef WITH_PYTHON_MODULE
PyThreadState *py_tstate = NULL;
const char *py_path_bundle = BLI_get_folder(BLENDER_SYSTEM_PYTHON, NULL);
/* not essential but nice to set our name */
static wchar_t program_path_wchar[FILE_MAX]; /* python holds a reference */
BLI_strncpy_wchar_from_utf8(program_path_wchar, BLI_program_path(), sizeof(program_path_wchar) / sizeof(wchar_t));
Py_SetProgramName(program_path_wchar);
/* must run before python initializes */
PyImport_ExtendInittab(bpy_internal_modules);
/* allow to use our own included python */
PyC_SetHomePath(py_path_bundle);
/* without this the sys.stdout may be set to 'ascii'
* (it is on my system at least), where printing unicode values will raise
* an error, this is highly annoying, another stumbling block for devs,
* so use a more relaxed error handler and enforce utf-8 since the rest of
* blender is utf-8 too - campbell */
BLI_setenv("PYTHONIOENCODING", "utf-8:surrogateescape");
/* Python 3.2 now looks for '2.xx/python/include/python3.2d/pyconfig.h' to
* parse from the 'sysconfig' module which is used by 'site',
* so for now disable site. alternatively we could copy the file. */
if (py_path_bundle) {
Py_NoSiteFlag = 1;
}
Py_FrozenFlag = 1;
Py_Initialize();
// PySys_SetArgv(argc, argv); // broken in py3, not a huge deal
/* sigh, why do python guys not have a (char **) version anymore? */
{
int i;
PyObject *py_argv = PyList_New(argc);
for (i = 0; i < argc; i++) {
/* should fix bug #20021 - utf path name problems, by replacing
* PyUnicode_FromString, with this one */
PyList_SET_ITEM(py_argv, i, PyC_UnicodeFromByte(argv[i]));
}
PySys_SetObject("argv", py_argv);
Py_DECREF(py_argv);
}
/* Initialize thread support (also acquires lock) */
PyEval_InitThreads();
#else
(void)argc;
(void)argv;
/* must run before python initializes */
PyImport_ExtendInittab(bpy_internal_modules);
#endif
bpy_intern_string_init();
/* bpy.* and lets us import it */
BPy_init_modules();
bpy_import_init(PyEval_GetBuiltins());
pyrna_alloc_types();
#ifndef WITH_PYTHON_MODULE
/* py module runs atexit when bpy is freed */
BPY_atexit_register(); /* this can init any time */
py_tstate = PyGILState_GetThisThreadState();
PyEval_ReleaseThread(py_tstate);
#endif
}
void BPY_python_end(void)
{
// fprintf(stderr, "Ending Python!\n");
PyGILState_Ensure(); /* finalizing, no need to grab the state */
// free other python data.
pyrna_free_types();
/* clear all python data from structs */
bpy_intern_string_exit();
#ifndef WITH_PYTHON_MODULE
BPY_atexit_unregister(); /* without this we get recursive calls to WM_exit */
#endif
Py_Finalize();
#ifdef TIME_PY_RUN
// measure time since py started
bpy_timer = PIL_check_seconds_timer() - bpy_timer;
printf("*bpy stats* - ");
printf("tot exec: %d, ", bpy_timer_count);
printf("tot run: %.4fsec, ", bpy_timer_run_tot);
if (bpy_timer_count > 0)
printf("average run: %.6fsec, ", (bpy_timer_run_tot / bpy_timer_count));
if (bpy_timer > 0.0)
printf("tot usage %.4f%%", (bpy_timer_run_tot / bpy_timer) * 100.0);
printf("\n");
// fprintf(stderr, "Ending Python Done!\n");
#endif
}
static void python_script_error_jump_text(struct Text *text)
{
int lineno;
int offset;
python_script_error_jump(text->id.name + 2, &lineno, &offset);
if (lineno != -1) {
/* select the line with the error */
txt_move_to(text, lineno - 1, INT_MAX, FALSE);
txt_move_to(text, lineno - 1, offset, TRUE);
}
}
/* super annoying, undo _PyModule_Clear(), bug [#23871] */
#define PYMODULE_CLEAR_WORKAROUND
#ifdef PYMODULE_CLEAR_WORKAROUND
/* bad!, we should never do this, but currently only safe way I could find to keep namespace.
* from being cleared. - campbell */
typedef struct {
PyObject_HEAD
PyObject *md_dict;
/* ommit other values, we only want the dict. */
} PyModuleObject;
#endif
static int python_script_exec(bContext *C, const char *fn, struct Text *text,
struct ReportList *reports, const short do_jump)
{
PyObject *main_mod = NULL;
PyObject *py_dict = NULL, *py_result = NULL;
PyGILState_STATE gilstate;
BLI_assert(fn || text);
if (fn == NULL && text == NULL) {
return 0;
}
bpy_context_set(C, &gilstate);
PyC_MainModule_Backup(&main_mod);
if (text) {
char fn_dummy[FILE_MAXDIR];
bpy_text_filename_get(fn_dummy, sizeof(fn_dummy), text);
if (text->compiled == NULL) { /* if it wasn't already compiled, do it now */
char *buf = txt_to_buf(text);
text->compiled = Py_CompileString(buf, fn_dummy, Py_file_input);
MEM_freeN(buf);
if (PyErr_Occurred()) {
if (do_jump) {
python_script_error_jump_text(text);
}
BPY_text_free_code(text);
}
}
if (text->compiled) {
py_dict = PyC_DefaultNameSpace(fn_dummy);
py_result = PyEval_EvalCode(text->compiled, py_dict, py_dict);
}
}
else {
FILE *fp = BLI_fopen(fn, "r");
if (fp) {
py_dict = PyC_DefaultNameSpace(fn);
#ifdef _WIN32
/* Previously we used PyRun_File to run directly the code on a FILE
* object, but as written in the Python/C API Ref Manual, chapter 2,
* 'FILE structs for different C libraries can be different and
* incompatible'.
* So now we load the script file data to a buffer */
{
char *pystring;
fclose(fp);
pystring = MEM_mallocN(strlen(fn) + 37, "pystring");
pystring[0] = '\0';
sprintf(pystring, "f=open(r'%s');exec(f.read());f.close()", fn);
py_result = PyRun_String(pystring, Py_file_input, py_dict, py_dict);
MEM_freeN(pystring);
}
#else
py_result = PyRun_File(fp, fn, Py_file_input, py_dict, py_dict);
fclose(fp);
#endif
}
else {
PyErr_Format(PyExc_IOError,
"Python file \"%s\" could not be opened: %s",
fn, strerror(errno));
py_result = NULL;
}
}
if (!py_result) {
if (text) {
if (do_jump) {
python_script_error_jump_text(text);
}
}
BPy_errors_to_report(reports);
}
else {
Py_DECREF(py_result);
}
if (py_dict) {
#ifdef PYMODULE_CLEAR_WORKAROUND
PyModuleObject *mmod = (PyModuleObject *)PyDict_GetItemString(PyThreadState_GET()->interp->modules, "__main__");
PyObject *dict_back = mmod->md_dict;
/* freeing the module will clear the namespace,
* gives problems running classes defined in this namespace being used later. */
mmod->md_dict = NULL;
Py_DECREF(dict_back);
#endif
#undef PYMODULE_CLEAR_WORKAROUND
}
PyC_MainModule_Restore(main_mod);
bpy_context_clear(C, &gilstate);
return (py_result != NULL);
}
/* Can run a file or text block */
int BPY_filepath_exec(bContext *C, const char *filepath, struct ReportList *reports)
{
return python_script_exec(C, filepath, NULL, reports, FALSE);
}
int BPY_text_exec(bContext *C, struct Text *text, struct ReportList *reports, const short do_jump)
{
return python_script_exec(C, NULL, text, reports, do_jump);
}
void BPY_DECREF(void *pyob_ptr)
{
PyGILState_STATE gilstate = PyGILState_Ensure();
Py_DECREF((PyObject *)pyob_ptr);
PyGILState_Release(gilstate);
}
/* return -1 on error, else 0 */
int BPY_button_exec(bContext *C, const char *expr, double *value, const short verbose)
{
PyGILState_STATE gilstate;
PyObject *py_dict, *mod, *retval;
int error_ret = 0;
PyObject *main_mod = NULL;
if (!value || !expr) return -1;
if (expr[0] == '\0') {
*value = 0.0;
return error_ret;
}
bpy_context_set(C, &gilstate);
PyC_MainModule_Backup(&main_mod);
py_dict = PyC_DefaultNameSpace("<blender button>");
mod = PyImport_ImportModule("math");
if (mod) {
PyDict_Merge(py_dict, PyModule_GetDict(mod), 0); /* 0 - don't overwrite existing values */
Py_DECREF(mod);
}
else { /* highly unlikely but possibly */
PyErr_Print();
PyErr_Clear();
}
retval = PyRun_String(expr, Py_eval_input, py_dict, py_dict);
if (retval == NULL) {
error_ret = -1;
}
else {
double val;
if (PyTuple_Check(retval)) {
/* Users my have typed in 10km, 2m
* add up all values */
int i;
val = 0.0;
for (i = 0; i < PyTuple_GET_SIZE(retval); i++) {
val += PyFloat_AsDouble(PyTuple_GET_ITEM(retval, i));
}
}
else {
val = PyFloat_AsDouble(retval);
}
Py_DECREF(retval);
if (val == -1 && PyErr_Occurred()) {
error_ret = -1;
}
else if (!finite(val)) {
*value = 0.0;
}
else {
*value = val;
}
}
if (error_ret) {
if (verbose) {
BPy_errors_to_report(CTX_wm_reports(C));
}
else {
PyErr_Clear();
}
}
PyC_MainModule_Backup(&main_mod);
bpy_context_clear(C, &gilstate);
return error_ret;
}
int BPY_string_exec(bContext *C, const char *expr)
{
PyGILState_STATE gilstate;
PyObject *main_mod = NULL;
PyObject *py_dict, *retval;
int error_ret = 0;
Main *bmain_back; /* XXX, quick fix for release (Copy Settings crash), needs further investigation */
if (!expr) return -1;
if (expr[0] == '\0') {
return error_ret;
}
bpy_context_set(C, &gilstate);
PyC_MainModule_Backup(&main_mod);
py_dict = PyC_DefaultNameSpace("<blender string>");
bmain_back = bpy_import_main_get();
bpy_import_main_set(CTX_data_main(C));
retval = PyRun_String(expr, Py_eval_input, py_dict, py_dict);
bpy_import_main_set(bmain_back);
if (retval == NULL) {
error_ret = -1;
BPy_errors_to_report(CTX_wm_reports(C));
}
else {
Py_DECREF(retval);
}
PyC_MainModule_Restore(main_mod);
bpy_context_clear(C, &gilstate);
return error_ret;
}
void BPY_modules_load_user(bContext *C)
{
PyGILState_STATE gilstate;
Main *bmain = CTX_data_main(C);
Text *text;
/* can happen on file load */
if (bmain == NULL)
return;
/* update pointers since this can run from a nested script
* on file load */
if (py_call_level) {
BPY_context_update(C);
}
bpy_context_set(C, &gilstate);
for (text = CTX_data_main(C)->text.first; text; text = text->id.next) {
if (text->flags & TXT_ISSCRIPT && BLI_testextensie(text->id.name + 2, ".py")) {
if (!(G.f & G_SCRIPT_AUTOEXEC)) {
printf("scripts disabled for \"%s\", skipping '%s'\n", bmain->name, text->id.name + 2);
}
else {
PyObject *module = bpy_text_import(text);
if (module == NULL) {
PyErr_Print();
PyErr_Clear();
}
else {
Py_DECREF(module);
}
}
}
}
bpy_context_clear(C, &gilstate);
}
int BPY_context_member_get(bContext *C, const char *member, bContextDataResult *result)
{
PyObject *pyctx = (PyObject *)CTX_py_dict_get(C);
PyObject *item = PyDict_GetItemString(pyctx, member);
PointerRNA *ptr = NULL;
int done = FALSE;
if (item == NULL) {
/* pass */
}
else if (item == Py_None) {
/* pass */
}
else if (BPy_StructRNA_Check(item)) {
ptr = &(((BPy_StructRNA *)item)->ptr);
//result->ptr = ((BPy_StructRNA *)item)->ptr;
CTX_data_pointer_set(result, ptr->id.data, ptr->type, ptr->data);
done = TRUE;
}
else if (PySequence_Check(item)) {
PyObject *seq_fast = PySequence_Fast(item, "bpy_context_get sequence conversion");
if (seq_fast == NULL) {
PyErr_Print();
PyErr_Clear();
}
else {
int len = PySequence_Fast_GET_SIZE(seq_fast);
int i;
for (i = 0; i < len; i++) {
PyObject *list_item = PySequence_Fast_GET_ITEM(seq_fast, i);
if (BPy_StructRNA_Check(list_item)) {
#if 0
CollectionPointerLink *link = MEM_callocN(sizeof(CollectionPointerLink), "bpy_context_get");
link->ptr = ((BPy_StructRNA *)item)->ptr;
BLI_addtail(&result->list, link);
#endif
ptr = &(((BPy_StructRNA *)list_item)->ptr);
CTX_data_list_add(result, ptr->id.data, ptr->type, ptr->data);
}
else {
printf("List item not a valid type\n");
}
}
Py_DECREF(seq_fast);
done = TRUE;
}
}
if (done == 0) {
if (item) printf("PyContext '%s' not a valid type\n", member);
else printf("PyContext '%s' not found\n", member);
}
else {
if (G.debug & G_DEBUG_PYTHON) {
printf("PyContext '%s' found\n", member);
}
}
return done;
}
#ifdef WITH_PYTHON_MODULE
#include "BLI_fileops.h"
/* TODO, reloading the module isn't functional at the moment. */
static void bpy_module_free(void *mod);
extern int main_python_enter(int argc, const char **argv);
extern void main_python_exit(void);
static struct PyModuleDef bpy_proxy_def = {
PyModuleDef_HEAD_INIT,
"bpy", /* m_name */
NULL, /* m_doc */
0, /* m_size */
NULL, /* m_methods */
NULL, /* m_reload */
NULL, /* m_traverse */
NULL, /* m_clear */
bpy_module_free, /* m_free */
};
typedef struct {
PyObject_HEAD
/* Type-specific fields go here. */
PyObject *mod;
} dealloc_obj;
/* call once __file__ is set */
void bpy_module_delay_init(PyObject *bpy_proxy)
{
const int argc = 1;
const char *argv[2];
/* updating the module dict below will loose the reference to __file__ */
PyObject *filename_obj = PyModule_GetFilenameObject(bpy_proxy);
const char *filename_rel = _PyUnicode_AsString(filename_obj); /* can be relative */
char filename_abs[1024];
BLI_strncpy(filename_abs, filename_rel, sizeof(filename_abs));
BLI_path_cwd(filename_abs);
argv[0] = filename_abs;
argv[1] = NULL;
// printf("module found %s\n", argv[0]);
main_python_enter(argc, argv);
/* initialized in BPy_init_modules() */
PyDict_Update(PyModule_GetDict(bpy_proxy), PyModule_GetDict(bpy_package_py));
}
static void dealloc_obj_dealloc(PyObject *self);
static PyTypeObject dealloc_obj_Type = {{{0}}};
/* use our own dealloc so we can free a property if we use one */
static void dealloc_obj_dealloc(PyObject *self)
{
bpy_module_delay_init(((dealloc_obj *)self)->mod);
/* Note, for subclassed PyObjects we cant just call PyObject_DEL() directly or it will crash */
dealloc_obj_Type.tp_free(self);
}
PyMODINIT_FUNC
PyInit_bpy(void)
{
PyObject *bpy_proxy = PyModule_Create(&bpy_proxy_def);
/* Problem:
* 1) this init function is expected to have a private member defined - 'md_def'
* but this is only set for C defined modules (not py packages)
* so we cant return 'bpy_package_py' as is.
*
* 2) there is a 'bpy' C module for python to load which is basically all of blender,
* and there is scripts/bpy/__init__.py,
* we may end up having to rename this module so there is no naming conflict here eg:
* 'from blender import bpy'
*
* 3) we don't know the filename at this point, workaround by assigning a dummy value
* which calls back when its freed so the real loading can take place.
*/
/* assign an object which is freed after __file__ is assigned */
dealloc_obj *dob;
/* assign dummy type */
dealloc_obj_Type.tp_name = "dealloc_obj";
dealloc_obj_Type.tp_basicsize = sizeof(dealloc_obj);
dealloc_obj_Type.tp_dealloc = dealloc_obj_dealloc;
dealloc_obj_Type.tp_flags = Py_TPFLAGS_DEFAULT;
if (PyType_Ready(&dealloc_obj_Type) < 0)
return NULL;
dob = (dealloc_obj *) dealloc_obj_Type.tp_alloc(&dealloc_obj_Type, 0);
dob->mod = bpy_proxy; /* borrow */
PyModule_AddObject(bpy_proxy, "__file__", (PyObject *)dob); /* borrow */
return bpy_proxy;
}
static void bpy_module_free(void *UNUSED(mod))
{
main_python_exit();
}
#endif
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