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/* $Id: BlendType.h 19825 2009-04-20 21:20:33Z ben2610 $
-----------------------------------------------------------------------------
This source file is part of VideoTexture library
Copyright (c) 2006 The Zdeno Ash Miklas
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser 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, or go to
http://www.gnu.org/copyleft/lesser.txt.
-----------------------------------------------------------------------------
*/
#if !defined BLENDTYPE_H
#define BLENDTYPE_H
/// class allows check type of blender python object and access its contained object
/// MUST ONLY BE USED FOR KX classes that are descendent of PyObjectPlus
template <class PyObj> class BlendType
{
public:
/// constructor
BlendType (char * name) : m_name(name) {}
/// check blender type and return pointer to contained object or NULL (if type is not valid)
PyObj * checkType (PyObject * obj)
{
// if pointer to type isn't set
if (m_objType == NULL)
{
// compare names of type
if (strcmp(obj->ob_type->tp_name, m_name) == 0)
// if name of type match, save pointer to type
m_objType = obj->ob_type;
else
// if names of type don't match, return NULL
return NULL;
}
// if pointer to type is set and don't match to type of provided object, return NULL
else if (obj->ob_type != m_objType)
return NULL;
// return pointer to object, this class can only be used for KX object =>
// the Py object is actually a proxy
return (PyObj*)BGE_PROXY_REF(obj);
}
/// parse arguments to get object
PyObj * parseArg (PyObject * args)
{
// parse arguments
PyObject * obj;
if (PyArg_ParseTuple(args, "O", &obj))
// if successfully parsed, return pointer to object
return checkType(obj);
// otherwise return NULL
return NULL;
}
protected:
/// name of Python type
char * m_name;
/// pointer to Python type
PyTypeObject * m_objType;
};
#endif
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