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/* $Id$
-----------------------------------------------------------------------------
This source file is part of blendTex 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.
-----------------------------------------------------------------------------
*/
#if !defined FILTERCOLOR_H
#define FILTERCOLOR_H
#include "Common.h"
#include "FilterBase.h"
/// pixel filter for gray scale
class FilterGray : public FilterBase
{
public:
/// constructor
FilterGray (void) {}
/// destructor
virtual ~FilterGray (void) {}
protected:
/// filter pixel template, source int buffer
template <class SRC> unsigned int tFilter (SRC src, short x, short y,
short * size, unsigned int pixSize, unsigned int val)
{
// calculate gray value
unsigned int gray = (28 * (VT_B(val)) + 151 * (VT_G(val))
+ 77 * (VT_R(val))) >> 8;
// return gray scale value
VT_R(val) = gray;
VT_G(val) = gray;
VT_B(val) = gray;
return val;
}
/// virtual filtering function for byte source
virtual unsigned int filter (unsigned char * src, short x, short y,
short * size, unsigned int pixSize, unsigned int val = 0)
{ return tFilter(src, x, y, size, pixSize, val); }
/// virtual filtering function for unsigned int source
virtual unsigned int filter (unsigned int * src, short x, short y,
short * size, unsigned int pixSize, unsigned int val = 0)
{ return tFilter(src, x, y, size, pixSize, val); }
};
/// type for color matrix
typedef short ColorMatrix[4][5];
/// pixel filter for color calculation
class FilterColor : public FilterBase
{
public:
/// constructor
FilterColor (void);
/// destructor
virtual ~FilterColor (void) {}
/// get color matrix
ColorMatrix & getMatrix (void) { return m_matrix; }
/// set color matrix
void setMatrix (ColorMatrix & mat);
protected:
/// color calculation matrix
ColorMatrix m_matrix;
/// calculate one color component
unsigned char calcColor (unsigned int val, short idx)
{
return (((m_matrix[idx][0] * (VT_R(val)) + m_matrix[idx][1] * (VT_G(val))
+ m_matrix[idx][2] * (VT_B(val)) + m_matrix[idx][3] * (VT_A(val))
+ m_matrix[idx][4]) >> 8) & 0xFF);
}
/// filter pixel template, source int buffer
template <class SRC> unsigned int tFilter (SRC src, short x, short y,
short * size, unsigned int pixSize, unsigned int val)
{
// return calculated color
int color;
VT_RGBA(color, calcColor(val, 0), calcColor(val, 1), calcColor(val, 2), calcColor(val, 3));
return color;
}
/// virtual filtering function for byte source
virtual unsigned int filter (unsigned char * src, short x, short y,
short * size, unsigned int pixSize, unsigned int val = 0)
{ return tFilter(src, x, y, size, pixSize, val); }
/// virtual filtering function for unsigned int source
virtual unsigned int filter (unsigned int * src, short x, short y,
short * size, unsigned int pixSize, unsigned int val = 0)
{ return tFilter(src, x, y, size, pixSize, val); }
};
/// type for color levels
typedef unsigned short ColorLevel[4][3];
/// pixel filter for color calculation
class FilterLevel : public FilterBase
{
public:
/// constructor
FilterLevel (void);
/// destructor
virtual ~FilterLevel (void) {}
/// get color matrix
ColorLevel & getLevels (void) { return levels; }
/// set color matrix
void setLevels (ColorLevel & lev);
protected:
/// color calculation matrix
ColorLevel levels;
/// calculate one color component
unsigned int calcColor (unsigned int val, short idx)
{
unsigned int col = VT_C(val,idx);;
if (col <= levels[idx][0]) col = 0;
else if (col >= levels[idx][1]) col = 0xFF;
else col = (((col - levels[idx][0]) << 8) / levels[idx][2]) & 0xFF;
return col;
}
/// filter pixel template, source int buffer
template <class SRC> unsigned int tFilter (SRC src, short x, short y,
short * size, unsigned int pixSize, unsigned int val)
{
// return calculated color
int color;
VT_RGBA(color, calcColor(val, 0), calcColor(val, 1), calcColor(val, 2), calcColor(val, 3));
return color;
}
/// virtual filtering function for byte source
virtual unsigned int filter (unsigned char * src, short x, short y,
short * size, unsigned int pixSize, unsigned int val = 0)
{ return tFilter(src, x, y, size, pixSize, val); }
/// virtual filtering function for unsigned int source
virtual unsigned int filter (unsigned int * src, short x, short y,
short * size, unsigned int pixSize, unsigned int val = 0)
{ return tFilter(src, x, y, size, pixSize, val); }
};
#endif
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