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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.
*
* Copyright (c) 2007 The Zdeno Ash Miklas
*
* This source file is part of VideoTexture library
*
* Contributor(s):
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file gameengine/VideoTexture/FilterBase.cpp
* \ingroup bgevideotex
*/
#include "FilterBase.h"
#include "PyObjectPlus.h"
#include <structmember.h>
// FilterBase class implementation
// constructor
FilterBase::FilterBase (void) : m_previous(NULL) {}
// destructor
FilterBase::~FilterBase (void)
{
// release Python objects, if not released yet
release();
}
// release python objects
void FilterBase::release (void)
{
// release previous filter object
setPrevious(NULL);
}
// set new previous filter
void FilterBase::setPrevious(PyFilter *filt, bool useRefCnt)
{
// if reference counting has to be used
if (useRefCnt)
{
// reference new filter
if (filt != NULL) Py_INCREF(filt);
// release old filter
Py_XDECREF(m_previous);
}
// set new previous filter
m_previous = filt;
}
// find first filter
FilterBase * FilterBase::findFirst (void)
{
// find first filter in chain
FilterBase * frst;
for (frst = this; frst->m_previous != NULL; frst = frst->m_previous->m_filter) {};
// set first filter
return frst;
}
// list offilter types
PyTypeList pyFilterTypes;
// functions for python interface
// object allocation
PyObject *Filter_allocNew (PyTypeObject *type, PyObject *args, PyObject *kwds)
{
// allocate object
PyFilter *self = reinterpret_cast<PyFilter*>(type->tp_alloc(type, 0));
// initialize object structure
self->m_filter = NULL;
// return allocated object
return reinterpret_cast<PyObject*>(self);
}
// object deallocation
void Filter_dealloc(PyFilter *self)
{
// release object attributes
if (self->m_filter != NULL)
{
self->m_filter->release();
delete self->m_filter;
self->m_filter = NULL;
}
}
// get previous pixel filter object
PyObject *Filter_getPrevious (PyFilter *self, void *closure)
{
// if filter object is available
if (self->m_filter != NULL)
{
// pixel filter object
PyObject *filt = reinterpret_cast<PyObject*>(self->m_filter->getPrevious());
// if filter is present
if (filt != NULL)
{
// return it
Py_INCREF(filt);
return filt;
}
}
// otherwise return none
Py_RETURN_NONE;
}
// set previous pixel filter object
int Filter_setPrevious(PyFilter *self, PyObject *value, void *closure)
{
// if filter object is available
if (self->m_filter != NULL)
{
// check new value
if (value == NULL || !pyFilterTypes.in(Py_TYPE(value)))
{
// report value error
PyErr_SetString(PyExc_TypeError, "Invalid type of value");
return -1;
}
// set new value
self->m_filter->setPrevious(reinterpret_cast<PyFilter*>(value));
}
// return success
return 0;
}
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