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blender-archive/source/blender/python/BPY_interface.c
Michel Selten ec669df6ee The following updates have been contributed by Willian P. Germano: 
* Implemented BPY_end_python function.
* Implemented error handling. This results in rerunning a script after an
  error has occurred. No need to restart blender anymore.
* Camera module supports dir()
* variable assignment now calls the Python equivalent function - this has
  type checking and should be safer now.
* Implemented the Lamp module. Used the Camera module as a template.
* Implemented the Image module.
* Added EXPP_ClampFloat and EXPP_intError functions to gen_utils.[ch]
* Implemented 'constant' object.
2003-04-08 19:54:14 +00:00

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/*
*
* ***** BEGIN GPL/BL DUAL 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. The Blender
* Foundation also sells licenses for use in proprietary software under
* the Blender License. See http://www.blender.org/BL/ for information
* about this.
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* This is a new part of Blender.
*
* Contributor(s): Michel Selten, Willian P. Germano
*
* ***** END GPL/BL DUAL LICENSE BLOCK *****
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <Python.h>
#include <stdio.h>
#include <MEM_guardedalloc.h>
#include <BKE_global.h>
#include <BKE_main.h>
#include <BKE_text.h>
#include <DNA_camera_types.h>
#include <DNA_ID.h>
#include <DNA_lamp_types.h>
#include <DNA_material_types.h>
#include <DNA_object_types.h>
#include <DNA_scene_types.h>
#include <DNA_scriptlink_types.h>
#include <DNA_space_types.h>
#include <DNA_text_types.h>
#include <DNA_world_types.h>
#include "BPY_extern.h"
#include "api2_2x/interface.h"
/*****************************************************************************/
/* Structure definitions */
/*****************************************************************************/
#define FILENAME_LENGTH 24
typedef struct _ScriptError {
char filename[FILENAME_LENGTH];
int lineno;
} ScriptError;
/*****************************************************************************/
/* Global variables */
/*****************************************************************************/
ScriptError g_script_error;
/*****************************************************************************/
/* Function prototypes */
/*****************************************************************************/
PyObject * RunPython(Text *text, PyObject *globaldict);
char * GetName(Text *text);
PyObject * CreateGlobalDictionary (void);
void ReleaseGlobalDictionary (PyObject * dict);
void DoAllScriptsFromList (ListBase * list, short event);
/*****************************************************************************/
/* Description: This function will initialise Python and all the implemented */
/* api variations. */
/* Notes: Currently only the api for 2.2x will be initialised. */
/*****************************************************************************/
void BPY_start_python(void)
{
printf ("In BPY_start_python\n");
/* TODO: Shouldn't "blender" be replaced by PACKAGE ?? (config.h) */
Py_SetProgramName("blender");
Py_Initialize ();
initBlenderApi2_2x ();
return;
}
/*****************************************************************************/
/* Description: This function will terminate the Python interpreter */
/*****************************************************************************/
void BPY_end_python(void)
{
printf ("In BPY_end_python\n");
Py_Finalize();
return;
}
/*****************************************************************************/
/* Description: This function will return the linenumber on which an error */
/* has occurred in the Python script. */
/*****************************************************************************/
int BPY_Err_getLinenumber(void)
{
printf ("In BPY_Err_getLinenumber\n");
return g_script_error.lineno;
}
/*****************************************************************************/
/* Description: This function will return the filename of the python script. */
/*****************************************************************************/
const char *BPY_Err_getFilename(void)
{
printf ("In BPY_Err_getFilename\n");
return g_script_error.filename;
}
/*****************************************************************************/
/* Description: This function executes the script passed by st. */
/* Notes: Currently, the script is compiled each time it is executed, */
/* This should be optimized to store the compiled bytecode as */
/* has been done by the previous implementation. */
/*****************************************************************************/
struct _object *BPY_txt_do_python(struct SpaceText* st)
{
PyObject * dict;
PyObject * ret;
printf ("In BPY_txt_do_python\n");
if (!st->text)
{
return NULL;
}
dict = PyModule_GetDict(PyImport_AddModule("__main__"));
/* dict = newGlobalDictionary(); */
ret = RunPython (st->text, dict);
/* If errors have occurred, set the error filename to the name of the
script.
*/
if (!ret)
{
sprintf(g_script_error.filename, "%s", st->text->id.name+2);
return NULL;
}
return dict;
}
/*****************************************************************************/
/* Description: */
/* Notes: Not implemented yet */
/*****************************************************************************/
void BPY_free_compiled_text(struct Text* text)
{
printf ("In BPY_free_compiled_text\n");
return;
}
/*****************************************************************************/
/* Description: */
/* Notes: Not implemented yet */
/*****************************************************************************/
void BPY_clear_bad_scriptlinks(struct Text *byebye)
{
printf ("In BPY_clear_bad_scriptlinks\n");
return;
}
/*****************************************************************************/
/* Description: Loop through all scripts of a list of object types, and */
/* execute these scripts. */
/* For the scene, only the current active scene the scripts are */
/* executed (if any). */
/*****************************************************************************/
void BPY_do_all_scripts(short event)
{
printf ("In BPY_do_all_scripts(event=%d)\n",event);
DoAllScriptsFromList (&(G.main->object), event);
DoAllScriptsFromList (&(G.main->lamp), event);
DoAllScriptsFromList (&(G.main->camera), event);
DoAllScriptsFromList (&(G.main->mat), event);
DoAllScriptsFromList (&(G.main->world), event);
BPY_do_pyscript (&(G.scene->id), event);
return;
}
/*****************************************************************************/
/* Description: Execute a Python script when an event occurs. The following */
/* events are possible: frame changed, load script and redraw. */
/* Only events happening to one of the following object types */
/* are handled: Object, Lamp, Camera, Material, World and */
/* Scene. */
/*****************************************************************************/
void BPY_do_pyscript(struct ID *id, short event)
{
ScriptLink * scriptlink;
int index;
PyObject * dict;
printf ("In BPY_do_pyscript(id=%s, event=%d)\n",id->name, event);
scriptlink = setScriptLinks (id, event);
if (scriptlink == NULL)
{
return;
}
for (index=0 ; index<scriptlink->totscript ; index++)
{
printf ("scriptnr: %d\tevent=%d, flag[index]=%d\n", index,
event, scriptlink->flag[index]);
if ((scriptlink->flag[index] == event) &&
(scriptlink->scripts[index]!=NULL))
{
dict = CreateGlobalDictionary();
RunPython ((Text*) scriptlink->scripts[index], dict);
ReleaseGlobalDictionary (dict);
}
}
return;
}
/*****************************************************************************/
/* Description: */
/* Notes: Not implemented yet */
/*****************************************************************************/
void BPY_free_scriptlink(struct ScriptLink *slink)
{
printf ("In BPY_free_scriptlink\n");
return;
}
/*****************************************************************************/
/* Description: */
/* Notes: Not implemented yet */
/*****************************************************************************/
void BPY_copy_scriptlink(struct ScriptLink *scriptlink)
{
printf ("In BPY_copy_scriptlink\n");
return;
}
/*****************************************************************************/
/* Description: */
/* Notes: Not implemented yet */
/*****************************************************************************/
int BPY_call_importloader(char *name)
{
printf ("In BPY_call_importloader(name=%s)\n",name);
return (0);
}
/*****************************************************************************/
/* Description: */
/* Notes: Not implemented yet */
/*****************************************************************************/
int BPY_spacetext_is_pywin(struct SpaceText *st)
{
/* No printf is done here because it is called with every mouse move */
return (0);
}
/*****************************************************************************/
/* Description: */
/* Notes: Not implemented yet */
/*****************************************************************************/
void BPY_spacetext_do_pywin_draw(struct SpaceText *st)
{
printf ("In BPY_spacetext_do_pywin_draw\n");
return;
}
/*****************************************************************************/
/* Description: */
/* Notes: Not implemented yet */
/*****************************************************************************/
void BPY_spacetext_do_pywin_event(struct SpaceText *st,
unsigned short event,
short val)
{
printf ("In BPY_spacetext_do_pywin_event(st=?, event=%d, val=%d)\n",
event, val);
return;
}
/*****************************************************************************/
/* Private functions */
/*****************************************************************************/
/*****************************************************************************/
/* Description: This function executes the python script passed by text. */
/* The Python dictionary containing global variables needs to */
/* be passed in globaldict. */
/*****************************************************************************/
PyObject * RunPython(Text *text, PyObject *globaldict)
{
PyObject * ret;
char * buf;
printf("Run Python script \"%s\" ...\n", GetName(text));
buf = txt_to_buf(text);
ret = PyRun_String (buf, Py_file_input, globaldict, globaldict);
if (!ret)
{
/* an exception was raised, handle it here */
PyErr_Print(); /* this function also clears the error
indicator */
}
else
{
PyErr_Clear(); /* seems necessary, at least now */
}
MEM_freeN (buf);
return ret;
}
/*****************************************************************************/
/* Description: This function returns the value of the name field of the */
/* given Text struct. */
/*****************************************************************************/
char * GetName(Text *text)
{
return (text->id.name+2);
}
/*****************************************************************************/
/* Description: This function creates a new Python dictionary object. */
/*****************************************************************************/
PyObject * CreateGlobalDictionary (void)
{
PyObject *dict = PyDict_New();
PyDict_SetItemString (dict, "__builtins__", PyEval_GetBuiltins());
PyDict_SetItemString (dict, "__name__", PyString_FromString("__main__"));
return (dict);
}
/*****************************************************************************/
/* Description: This function deletes a given Python dictionary object. */
/*****************************************************************************/
void ReleaseGlobalDictionary (PyObject * dict)
{
PyDict_Clear (dict);
Py_DECREF (dict); /* Release dictionary. */
}
/*****************************************************************************/
/* Description: This function runs all scripts (if any) present in the */
/* list argument. The event by which the function has been */
/* called, is passed in the event argument. */
/*****************************************************************************/
void DoAllScriptsFromList (ListBase * list, short event)
{
ID * id;
id = list->first;
while (id != NULL)
{
BPY_do_pyscript (id, event);
id = id->next;
}
}
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