111 lines
2.8 KiB
C++
111 lines
2.8 KiB
C++
/* This file is part of Mapnik (c++ mapping toolkit)
|
|
* Copyright (C) 2005 Artem Pavlenko
|
|
*
|
|
* Mapnik 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
//$Id$
|
|
|
|
#ifndef GRAPHICS_HH
|
|
#define GRAPHICS_HH
|
|
|
|
#include <cmath>
|
|
#include <string>
|
|
#include <cassert>
|
|
#include "style.hh"
|
|
#include "gamma.hh"
|
|
#include "image_data.hh"
|
|
|
|
namespace mapnik
|
|
{
|
|
class Image32
|
|
{
|
|
private:
|
|
int width_;
|
|
int height_;
|
|
Color background_;
|
|
ImageData32 data_;
|
|
static gamma gammaTable_;
|
|
public:
|
|
Image32(int width,int height);
|
|
Image32(const Image32& rhs);
|
|
~Image32();
|
|
static void setGamma(double gamma);
|
|
int width() const;
|
|
int height() const;
|
|
void setBackground(const Color& background);
|
|
const Color& getBackground() const;
|
|
void set_rectangle(unsigned x,unsigned y,const ImageData32& data);
|
|
const ImageData32& data() const;
|
|
inline ImageData32& data() {
|
|
return data_;
|
|
}
|
|
inline const unsigned char* raw_data() const
|
|
{
|
|
return data_.getBytes();
|
|
}
|
|
|
|
inline unsigned char* raw_data()
|
|
{
|
|
return data_.getBytes();
|
|
}
|
|
|
|
void saveToFile(const std::string& file,const std::string& format="auto");
|
|
private:
|
|
|
|
inline bool checkBounds(int x,int y) const
|
|
{
|
|
return (x>=0 && x<width_ && y>=0 && y<height_);
|
|
}
|
|
|
|
public:
|
|
inline void setPixel(int x,int y,unsigned int rgba)
|
|
{
|
|
if (checkBounds(x,y))
|
|
{
|
|
data_(x,y)=rgba;
|
|
}
|
|
}
|
|
inline int blendColor(int c0,int c1,int t)
|
|
{
|
|
int bgRed=(c1>>16)&0xff;
|
|
int bgGreen=(c1>>8)&0xff;
|
|
int bgBlue=c1&0xff;
|
|
|
|
int red=(c0>>16)&0xff;
|
|
int green=(c0>>8)&0xff;
|
|
int blue=c0&0xff;
|
|
|
|
int alpha=t;
|
|
|
|
int r=gammaTable_.l2g[(gammaTable_.g2l[red]*alpha+gammaTable_.g2l[bgRed]*(255-alpha))>>8];
|
|
int g=gammaTable_.l2g[(gammaTable_.g2l[green]*alpha+gammaTable_.g2l[bgGreen]*(255-alpha))>>8];
|
|
int b=gammaTable_.l2g[(gammaTable_.g2l[blue]*alpha+gammaTable_.g2l[bgBlue]*(255-alpha))>>8];
|
|
|
|
return 0xff<<24 | r<<16 | g<<8 | b;
|
|
}
|
|
|
|
inline void blendPixel(int x,int y,unsigned int rgba,int t)
|
|
{
|
|
if (checkBounds(x,y))
|
|
{
|
|
int bg=data_(x,y);
|
|
int nc=blendColor(rgba,bg,t);
|
|
data_(x,y)=nc;
|
|
}
|
|
}
|
|
};
|
|
}
|
|
#endif //GRAPHICS_HH
|