239 lines
8.4 KiB
C++
239 lines
8.4 KiB
C++
/*****************************************************************************
|
|
*
|
|
* This file is part of Mapnik (c++ mapping toolkit)
|
|
*
|
|
* Copyright (C) 2006 Artem Pavlenko
|
|
*
|
|
* This library 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 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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 library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
*****************************************************************************/
|
|
|
|
//$Id: graphics.hpp 39 2005-04-10 20:39:53Z pavlenko $
|
|
|
|
#ifndef GRAPHICS_HPP
|
|
#define GRAPHICS_HPP
|
|
// mapnik
|
|
#include <mapnik/color.hpp>
|
|
#include <mapnik/gamma.hpp>
|
|
#include <mapnik/image_data.hpp>
|
|
#include <mapnik/envelope.hpp>
|
|
#include <mapnik/image_view.hpp>
|
|
// stl
|
|
#include <cmath>
|
|
#include <string>
|
|
#include <cassert>
|
|
|
|
// cairo
|
|
#ifdef HAVE_CAIRO
|
|
#include <cairomm/surface.h>
|
|
#endif
|
|
|
|
namespace mapnik
|
|
{
|
|
class MAPNIK_DECL Image32
|
|
{
|
|
private:
|
|
unsigned width_;
|
|
unsigned height_;
|
|
color background_;
|
|
ImageData32 data_;
|
|
public:
|
|
Image32(int width,int height);
|
|
Image32(Image32 const& rhs);
|
|
#ifdef HAVE_CAIRO
|
|
Image32(Cairo::RefPtr<Cairo::ImageSurface> rhs);
|
|
#endif
|
|
~Image32();
|
|
void setBackground(color const& background);
|
|
const color& getBackground() const;
|
|
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();
|
|
}
|
|
|
|
inline image_view<ImageData32> get_view(unsigned x,unsigned y, unsigned w,unsigned h)
|
|
{
|
|
return image_view<ImageData32>(x,y,w,h,data_);
|
|
}
|
|
|
|
private:
|
|
|
|
inline bool checkBounds(unsigned x, unsigned y) const
|
|
{
|
|
return (x < width_ && y < height_);
|
|
}
|
|
|
|
public:
|
|
inline void setPixel(int x,int y,unsigned int rgba)
|
|
{
|
|
if (checkBounds(x,y))
|
|
{
|
|
data_(x,y)=rgba;
|
|
}
|
|
}
|
|
inline void blendPixel(int x,int y,unsigned int rgba1,int t)
|
|
{
|
|
if (checkBounds(x,y))
|
|
{
|
|
unsigned rgba0 = data_(x,y);
|
|
unsigned a1 = (rgba1 >> 24) & 0xff; //t;
|
|
a1 = (t*a1) / 255;
|
|
if (a1 == 0) return;
|
|
unsigned r1 = rgba1 & 0xff;
|
|
unsigned g1 = (rgba1 >> 8 ) & 0xff;
|
|
unsigned b1 = (rgba1 >> 16) & 0xff;
|
|
|
|
unsigned a0 = (rgba0 >> 24) & 0xff;
|
|
unsigned r0 = (rgba0 & 0xff) * a0;
|
|
unsigned g0 = ((rgba0 >> 8 ) & 0xff) * a0;
|
|
unsigned b0 = ((rgba0 >> 16) & 0xff) * a0;
|
|
|
|
a0 = ((a1 + a0) << 8) - a0*a1;
|
|
|
|
r0 = ((((r1 << 8) - r0) * a1 + (r0 << 8)) / a0);
|
|
g0 = ((((g1 << 8) - g0) * a1 + (g0 << 8)) / a0);
|
|
b0 = ((((b1 << 8) - b0) * a1 + (b0 << 8)) / a0);
|
|
a0 = a0 >> 8;
|
|
data_(x,y)= (a0 << 24)| (b0 << 16) | (g0 << 8) | (r0) ;
|
|
}
|
|
}
|
|
|
|
inline unsigned width() const
|
|
{
|
|
return width_;
|
|
}
|
|
|
|
inline unsigned height() const
|
|
{
|
|
return height_;
|
|
}
|
|
|
|
inline void set_rectangle(int x0,int y0,ImageData32 const& data)
|
|
{
|
|
Envelope<int> ext0(0,0,width_,height_);
|
|
Envelope<int> ext1(x0,y0,x0+data.width(),y0+data.height());
|
|
|
|
if (ext0.intersects(ext1))
|
|
{
|
|
Envelope<int> box = ext0.intersect(ext1);
|
|
for (int y = box.miny(); y < box.maxy(); ++y)
|
|
{
|
|
unsigned int* row_to = data_.getRow(y);
|
|
unsigned int const * row_from = data.getRow(y-y0);
|
|
|
|
for (int x = box.minx(); x < box.maxx(); ++x)
|
|
{
|
|
if (row_from[x-x0] & 0xff000000)
|
|
{
|
|
row_to[x] = row_from[x-x0];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
inline void set_rectangle_alpha(int x0,int y0,const ImageData32& data)
|
|
{
|
|
Envelope<int> ext0(0,0,width_,height_);
|
|
Envelope<int> ext1(x0,y0,x0 + data.width(),y0 + data.height());
|
|
|
|
if (ext0.intersects(ext1))
|
|
{
|
|
Envelope<int> box = ext0.intersect(ext1);
|
|
for (int y = box.miny(); y < box.maxy(); ++y)
|
|
{
|
|
unsigned int* row_to = data_.getRow(y);
|
|
unsigned int const * row_from = data.getRow(y-y0);
|
|
for (int x = box.minx(); x < box.maxx(); ++x)
|
|
{
|
|
unsigned rgba0 = row_to[x];
|
|
unsigned rgba1 = row_from[x-x0];
|
|
|
|
unsigned a1 = (rgba1 >> 24) & 0xff;
|
|
if (a1 == 0) continue;
|
|
unsigned r1 = rgba1 & 0xff;
|
|
unsigned g1 = (rgba1 >> 8 ) & 0xff;
|
|
unsigned b1 = (rgba1 >> 16) & 0xff;
|
|
|
|
unsigned a0 = (rgba0 >> 24) & 0xff;
|
|
unsigned r0 = (rgba0 & 0xff) * a0;
|
|
unsigned g0 = ((rgba0 >> 8 ) & 0xff) * a0;
|
|
unsigned b0 = ((rgba0 >> 16) & 0xff) * a0;
|
|
|
|
a0 = ((a1 + a0) << 8) - a0*a1;
|
|
|
|
r0 = ((((r1 << 8) - r0) * a1 + (r0 << 8)) / a0);
|
|
g0 = ((((g1 << 8) - g0) * a1 + (g0 << 8)) / a0);
|
|
b0 = ((((b1 << 8) - b0) * a1 + (b0 << 8)) / a0);
|
|
a0 = a0 >> 8;
|
|
row_to[x] = (a0 << 24)| (b0 << 16) | (g0 << 8) | (r0) ;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
inline void set_rectangle_alpha2(ImageData32 const& data, unsigned x0, unsigned y0, float opacity)
|
|
{
|
|
Envelope<int> ext0(0,0,width_,height_);
|
|
Envelope<int> ext1(x0,y0,x0 + data.width(),y0 + data.height());
|
|
|
|
if (ext0.intersects(ext1))
|
|
{
|
|
Envelope<int> box = ext0.intersect(ext1);
|
|
for (int y = box.miny(); y < box.maxy(); ++y)
|
|
{
|
|
unsigned int* row_to = data_.getRow(y);
|
|
unsigned int const * row_from = data.getRow(y-y0);
|
|
for (int x = box.minx(); x < box.maxx(); ++x)
|
|
{
|
|
unsigned rgba0 = row_to[x];
|
|
unsigned rgba1 = row_from[x-x0];
|
|
unsigned a1 = int( ((rgba1 >> 24) & 0xff) * opacity );
|
|
if (a1 == 0) continue;
|
|
unsigned r1 = rgba1 & 0xff;
|
|
unsigned g1 = (rgba1 >> 8 ) & 0xff;
|
|
unsigned b1 = (rgba1 >> 16) & 0xff;
|
|
|
|
unsigned a0 = (rgba0 >> 24) & 0xff;
|
|
unsigned r0 = rgba0 & 0xff ;
|
|
unsigned g0 = (rgba0 >> 8 ) & 0xff;
|
|
unsigned b0 = (rgba0 >> 16) & 0xff;
|
|
|
|
unsigned a = (a1 * 255 + (255 - a1) * a0 + 127)/255;
|
|
|
|
r0 = (r1*a1 + (((255 - a1) * a0 + 127)/255) * r0 + 127)/a;
|
|
g0 = (g1*a1 + (((255 - a1) * a0 + 127)/255) * g0 + 127)/a;
|
|
b0 = (b1*a1 + (((255 - a1) * a0 + 127)/255) * b0 + 127)/a;
|
|
|
|
row_to[x] = (a << 24)| (b0 << 16) | (g0 << 8) | (r0) ;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
};
|
|
}
|
|
#endif //GRAPHICS_HPP
|