FilterColor.cpp

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/*
-----------------------------------------------------------------------------
This source file is part of VideoTexture library

Copyright (c) 2007 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.
-----------------------------------------------------------------------------
*/

#include <PyObjectPlus.h>
#include <structmember.h>

#include "FilterColor.h"

#include "FilterBase.h"
#include "PyTypeList.h"

// implementation FilterGray

// attributes structure
static PyGetSetDef filterGrayGetSets[] =
{ // attributes from FilterBase class
    {(char*)"previous", (getter)Filter_getPrevious, (setter)Filter_setPrevious, (char*)"previous pixel filter", NULL},
    {NULL}
};

// define python type
PyTypeObject FilterGrayType =
{ 
    PyVarObject_HEAD_INIT(NULL, 0)
    "VideoTexture.FilterGray",   /*tp_name*/
    sizeof(PyFilter),          /*tp_basicsize*/
    0,                         /*tp_itemsize*/
    (destructor)Filter_dealloc,/*tp_dealloc*/
    0,                         /*tp_print*/
    0,                         /*tp_getattr*/
    0,                         /*tp_setattr*/
    0,                         /*tp_compare*/
    0,                         /*tp_repr*/
    0,                         /*tp_as_number*/
    0,                         /*tp_as_sequence*/
    0,                         /*tp_as_mapping*/
    0,                         /*tp_hash */
    0,                         /*tp_call*/
    0,                         /*tp_str*/
    0,                         /*tp_getattro*/
    0,                         /*tp_setattro*/
    0,                         /*tp_as_buffer*/
    Py_TPFLAGS_DEFAULT,        /*tp_flags*/
    "Filter for gray scale effect",       /* tp_doc */
    0,                     /* tp_traverse */
    0,                     /* tp_clear */
    0,                     /* tp_richcompare */
    0,                     /* tp_weaklistoffset */
    0,                     /* tp_iter */
    0,                     /* tp_iternext */
    NULL,                /* tp_methods */
    0,                   /* tp_members */
    filterGrayGetSets,           /* tp_getset */
    0,                         /* tp_base */
    0,                         /* tp_dict */
    0,                         /* tp_descr_get */
    0,                         /* tp_descr_set */
    0,                         /* tp_dictoffset */
    (initproc)Filter_init<FilterGray>,     /* tp_init */
    0,                         /* tp_alloc */
    Filter_allocNew,           /* tp_new */
};


// implementation FilterColor

// constructor
FilterColor::FilterColor (void)
{
    // reset color matrix to identity
    for (int r = 0; r < 4; ++r)
        for (int c = 0; c < 5; ++c)
            m_matrix[r][c] = (r == c) ? 256 : 0; 
}

// set color matrix
void FilterColor::setMatrix (ColorMatrix & mat)
{
    // copy matrix
    for (int r = 0; r < 4; ++r)
        for (int c = 0; c < 5; ++c)
            m_matrix[r][c] = mat[r][c]; 
}



// cast Filter pointer to FilterColor
inline FilterColor * getFilterColor (PyFilter * self)
{ return static_cast<FilterColor*>(self->m_filter); }


// python methods and get/sets

// get color matrix
static PyObject * getMatrix (PyFilter * self, void * closure)
{
    ColorMatrix & mat = getFilterColor(self)->getMatrix();
    return Py_BuildValue("((hhhhh)(hhhhh)(hhhhh)(hhhhh))",
        mat[0][0], mat[0][1], mat[0][2], mat[0][3], mat[0][4],
        mat[1][0], mat[1][1], mat[1][2], mat[1][3], mat[1][4],
        mat[2][0], mat[2][1], mat[2][2], mat[2][3], mat[2][4],
        mat[3][0], mat[3][1], mat[3][2], mat[3][3], mat[3][4]);
}

// set color matrix
static int setMatrix (PyFilter * self, PyObject * value, void * closure)
{
    // matrix to store items
    ColorMatrix mat;
    // check validity of parameter
    bool valid = value != NULL && PySequence_Check(value)
        && PySequence_Size(value) == 4;
    // check rows
    for (int r = 0; valid && r < 4; ++r)
    {
        // get row object
        PyObject * row = PySequence_Fast_GET_ITEM(value, r);
        // check sequence
        valid = PySequence_Check(row) && PySequence_Size(row) == 5;
        // check items
        for (int c = 0; valid && c < 5; ++c)
        {
            // item must be int
            valid = PyLong_Check(PySequence_Fast_GET_ITEM(row, c));
            // if it is valid, save it in matrix
            if (valid)
                mat[r][c] = short(PyLong_AsSsize_t(PySequence_Fast_GET_ITEM(row, c)));
        }
    }
    // if parameter is not valid, report error
    if (!valid)
    {
        PyErr_SetString(PyExc_TypeError, "The value must be a matrix [4][5] of ints");
        return -1;
    }
    // set color matrix
    getFilterColor(self)->setMatrix(mat);
    // success
    return 0;
}


// attributes structure
static PyGetSetDef filterColorGetSets[] =
{ 
    {(char*)"matrix", (getter)getMatrix, (setter)setMatrix, (char*)"matrix [4][5] for color calculation", NULL},
    // attributes from FilterBase class
    {(char*)"previous", (getter)Filter_getPrevious, (setter)Filter_setPrevious, (char*)"previous pixel filter", NULL},
    {NULL}
};

// define python type
PyTypeObject FilterColorType =
{ 
    PyVarObject_HEAD_INIT(NULL, 0)
    "VideoTexture.FilterColor",   /*tp_name*/
    sizeof(PyFilter),          /*tp_basicsize*/
    0,                         /*tp_itemsize*/
    (destructor)Filter_dealloc,/*tp_dealloc*/
    0,                         /*tp_print*/
    0,                         /*tp_getattr*/
    0,                         /*tp_setattr*/
    0,                         /*tp_compare*/
    0,                         /*tp_repr*/
    0,                         /*tp_as_number*/
    0,                         /*tp_as_sequence*/
    0,                         /*tp_as_mapping*/
    0,                         /*tp_hash */
    0,                         /*tp_call*/
    0,                         /*tp_str*/
    0,                         /*tp_getattro*/
    0,                         /*tp_setattro*/
    0,                         /*tp_as_buffer*/
    Py_TPFLAGS_DEFAULT,        /*tp_flags*/
    "Filter for color calculations",       /* tp_doc */
    0,                     /* tp_traverse */
    0,                     /* tp_clear */
    0,                     /* tp_richcompare */
    0,                     /* tp_weaklistoffset */
    0,                     /* tp_iter */
    0,                     /* tp_iternext */
    NULL,                /* tp_methods */
    0,                   /* tp_members */
    filterColorGetSets,           /* tp_getset */
    0,                         /* tp_base */
    0,                         /* tp_dict */
    0,                         /* tp_descr_get */
    0,                         /* tp_descr_set */
    0,                         /* tp_dictoffset */
    (initproc)Filter_init<FilterColor>,     /* tp_init */
    0,                         /* tp_alloc */
    Filter_allocNew,           /* tp_new */
};

// implementation FilterLevel

// constructor
FilterLevel::FilterLevel (void)
{
    // reset color levels
    for (int r = 0; r < 4; ++r)
    {
        levels[r][0] = 0;
        levels[r][1] = 0xFF;
        levels[r][2] = 0xFF;
    }
}

// set color levels
void FilterLevel::setLevels (ColorLevel & lev)
{
    // copy levels
    for (int r = 0; r < 4; ++r)
    {
        for (int c = 0; c < 2; ++c)
            levels[r][c] = lev[r][c];
        levels[r][2] = lev[r][0] < lev[r][1] ? lev[r][1] - lev[r][0] : 1;
    }
}


// cast Filter pointer to FilterLevel
inline FilterLevel * getFilterLevel (PyFilter * self)
{ return static_cast<FilterLevel*>(self->m_filter); }


// python methods and get/sets

// get color levels
static PyObject * getLevels (PyFilter * self, void * closure)
{
    ColorLevel & lev = getFilterLevel(self)->getLevels();
    return Py_BuildValue("((HH)(HH)(HH)(HH))",
        lev[0][0], lev[0][1], lev[1][0], lev[1][1],
        lev[2][0], lev[2][1], lev[3][0], lev[3][1]);
}

// set color levels
static int setLevels (PyFilter * self, PyObject * value, void * closure)
{
    // matrix to store items
    ColorLevel lev;
    // check validity of parameter
    bool valid = value != NULL && PySequence_Check(value)
        && PySequence_Size(value) == 4;
    // check rows
    for (int r = 0; valid && r < 4; ++r)
    {
        // get row object
        PyObject * row = PySequence_Fast_GET_ITEM(value, r);
        // check sequence
        valid = PySequence_Check(row) && PySequence_Size(row) == 2;
        // check items
        for (int c = 0; valid && c < 2; ++c)
        {
            // item must be int
            valid = PyLong_Check(PySequence_Fast_GET_ITEM(row, c));
            // if it is valid, save it in matrix
            if (valid)
                lev[r][c] = (unsigned short)(PyLong_AsSsize_t(PySequence_Fast_GET_ITEM(row, c)));
        }
    }
    // if parameter is not valid, report error
    if (!valid)
    {
        PyErr_SetString(PyExc_TypeError, "The value must be a matrix [4][2] of ints");
        return -1;
    }
    // set color matrix
    getFilterLevel(self)->setLevels(lev);
    // success
    return 0;
}


// attributes structure
static PyGetSetDef filterLevelGetSets[] =
{ 
    {(char*)"levels", (getter)getLevels, (setter)setLevels, (char*)"levels matrix [4] (min, max)", NULL},
    // attributes from FilterBase class
    {(char*)"previous", (getter)Filter_getPrevious, (setter)Filter_setPrevious, (char*)"previous pixel filter", NULL},
    {NULL}
};

// define python type
PyTypeObject FilterLevelType =
{ 
    PyVarObject_HEAD_INIT(NULL, 0)
    "VideoTexture.FilterLevel",   /*tp_name*/
    sizeof(PyFilter),          /*tp_basicsize*/
    0,                         /*tp_itemsize*/
    (destructor)Filter_dealloc,/*tp_dealloc*/
    0,                         /*tp_print*/
    0,                         /*tp_getattr*/
    0,                         /*tp_setattr*/
    0,                         /*tp_compare*/
    0,                         /*tp_repr*/
    0,                         /*tp_as_number*/
    0,                         /*tp_as_sequence*/
    0,                         /*tp_as_mapping*/
    0,                         /*tp_hash */
    0,                         /*tp_call*/
    0,                         /*tp_str*/
    0,                         /*tp_getattro*/
    0,                         /*tp_setattro*/
    0,                         /*tp_as_buffer*/
    Py_TPFLAGS_DEFAULT,        /*tp_flags*/
    "Filter for levels calculations",       /* tp_doc */
    0,                     /* tp_traverse */
    0,                     /* tp_clear */
    0,                     /* tp_richcompare */
    0,                     /* tp_weaklistoffset */
    0,                     /* tp_iter */
    0,                     /* tp_iternext */
    NULL,                /* tp_methods */
    0,                   /* tp_members */
    filterLevelGetSets,           /* tp_getset */
    0,                         /* tp_base */
    0,                         /* tp_dict */
    0,                         /* tp_descr_get */
    0,                         /* tp_descr_set */
    0,                         /* tp_dictoffset */
    (initproc)Filter_init<FilterLevel>,     /* tp_init */
    0,                         /* tp_alloc */
    Filter_allocNew,           /* tp_new */
};