/
polygon_symbolizer.hpp
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/
polygon_symbolizer.hpp
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/* 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: polygon_symbolizer.hpp 39 2005-04-10 20:39:53Z pavlenko $
#ifndef POLYGON_SYMBOLIZER_HPP
#define POLYGON_SYMBOLIZER_HPP
#include "symbolizer.hpp"
#include "image_reader.hpp"
//#include "scanline_aa.hpp"
//#include "line_aa.hpp"
#include "agg_basics.h"
#include "agg_rendering_buffer.h"
#include "agg_rasterizer_scanline_aa.h"
#include "agg_scanline_p.h"
#include "agg_scanline_u.h"
#include "agg_renderer_scanline.h"
#include "agg_pixfmt_rgba.h"
#include "agg_path_storage.h"
#include "agg_span_pattern_rgba.h"
namespace mapnik
{
struct polygon_symbolizer : public symbolizer
{
private:
Color fill_;
public:
polygon_symbolizer(const Color& fill)
: symbolizer(),
fill_(fill) {}
virtual ~polygon_symbolizer() {}
void render(geometry_type& geom,Image32& image) const
{
//ScanlineRasterizerAA<Image32> rasterizer(image);
//rasterizer.render<SHIFT8>(geom,fill_);
typedef agg::renderer_base<agg::pixfmt_rgba32> ren_base;
typedef agg::renderer_scanline_aa_solid<ren_base> renderer;
agg::row_ptr_cache<agg::int8u> buf(image.raw_data(),image.width(),image.height(),
image.width()*4);
agg::pixfmt_rgba32 pixf(buf);
ren_base renb(pixf);
double r=fill_.red()/255.0;
double g=fill_.green()/255.0;
double b=fill_.blue()/255.0;
renderer ren(renb);
agg::rasterizer_scanline_aa<> ras;
agg::scanline_u8 sl;
ras.clip_box(0,0,image.width(),image.height());
ras.add_path(geom);
ren.color(agg::rgba(r, g, b, 1.0));
agg::render_scanlines(ras, sl, ren);
}
private:
polygon_symbolizer(const polygon_symbolizer&);
polygon_symbolizer& operator=(const polygon_symbolizer&);
};
struct pattern_symbolizer : public symbolizer
{
private:
ImageData32 pattern_;
public:
pattern_symbolizer(std::string const& file,
std::string const& type,
unsigned width,unsigned height)
: symbolizer(),
pattern_(width,height)
{
try
{
std::auto_ptr<ImageReader> reader(get_image_reader(type,file));
std::cout<<"image width="<<reader->width()<<std::endl;
std::cout<<"image height="<<reader->height()<<std::endl;
reader->read(0,0,pattern_);
}
catch (...)
{
std::cerr<<"exception caught..."<<std::endl;
}
}
virtual ~pattern_symbolizer() {}
void render(geometry_type& geom,Image32& image) const
{
typedef agg::renderer_base<agg::pixfmt_rgba32> ren_base;
typedef agg::renderer_scanline_aa_solid<ren_base> renderer_solid;
agg::row_ptr_cache<agg::int8u> buf(image.raw_data(),image.width(),image.height(),
image.width()*4);
agg::pixfmt_rgba32 pixf(buf);
ren_base renb(pixf);
unsigned w=pattern_.width();
unsigned h=pattern_.height();
agg::row_ptr_cache<agg::int8u> pattern_rbuf((agg::int8u*)pattern_.getBytes(),w,h,w*4);
typedef agg::wrap_mode_repeat wrap_x_type;
typedef agg::wrap_mode_repeat wrap_y_type;
typedef agg::span_pattern_rgba<agg::rgba8,
agg::order_rgba,
wrap_x_type,
wrap_y_type> span_gen_type;
typedef agg::renderer_scanline_aa<ren_base, span_gen_type> renderer_type;
unsigned offset_x = 0;
unsigned offset_y = 0;
agg::span_allocator<agg::rgba8> sa;
span_gen_type sg(sa, pattern_rbuf, offset_x, offset_y);
renderer_type rp(renb, sg);
agg::rasterizer_scanline_aa<> ras;
agg::scanline_u8 sl;
ras.clip_box(0,0,image.width(),image.height());
ras.add_path(geom);
//ren.color(agg::rgba(r, g, b, 1.0));
agg::render_scanlines(ras, sl, rp);
}
private:
pattern_symbolizer(const pattern_symbolizer&);
pattern_symbolizer& operator=(const pattern_symbolizer&);
};
}
#endif // POLYGON_SYMBOLIZER_HPP