98 lines
2.9 KiB
C++
98 lines
2.9 KiB
C++
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/* This file is part of Mapnik (c++ mapping toolkit)
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* Copyright (C) 2005 Artem Pavlenko
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*
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* Mapnik is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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//$Id$
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#include "polygon_pattern_symbolizer.hpp"
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#include "image_reader.hpp"
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#include "agg_basics.h"
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#include "agg_rendering_buffer.h"
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#include "agg_rasterizer_scanline_aa.h"
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#include "agg_scanline_p.h"
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#include "agg_scanline_u.h"
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#include "agg_renderer_scanline.h"
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#include "agg_pixfmt_rgba.h"
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#include "agg_path_storage.h"
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#include "agg_span_allocator.h"
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#include "agg_span_pattern_rgba.h"
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#include "agg_image_accessors.h"
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namespace mapnik
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{
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polygon_pattern_symbolizer::polygon_pattern_symbolizer(std::string const& file,
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std::string const& type,
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unsigned width,unsigned height)
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: symbolizer(),
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pattern_(width,height)
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{
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try
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{
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std::auto_ptr<ImageReader> reader(get_image_reader(type,file));
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reader->read(0,0,pattern_);
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}
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catch (...)
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{
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std::cerr<<"exception caught..."<<std::endl;
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}
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}
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void polygon_pattern_symbolizer::render(geometry_type& geom,Image32& image) const
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{
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typedef agg::renderer_base<agg::pixfmt_rgba32> ren_base;
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agg::row_ptr_cache<agg::int8u> buf(image.raw_data(),image.width(),image.height(),
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image.width()*4);
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agg::pixfmt_rgba32 pixf(buf);
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ren_base renb(pixf);
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unsigned w=pattern_.width();
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unsigned h=pattern_.height();
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agg::row_ptr_cache<agg::int8u> pattern_rbuf((agg::int8u*)pattern_.getBytes(),w,h,w*4);
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typedef agg::wrap_mode_repeat wrap_x_type;
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typedef agg::wrap_mode_repeat wrap_y_type;
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typedef agg::image_accessor_wrap<agg::pixfmt_rgba32,
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wrap_x_type,
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wrap_y_type> img_source_type;
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typedef agg::span_pattern_rgba<img_source_type> span_gen_type;
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typedef agg::renderer_scanline_aa<ren_base,
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agg::span_allocator<agg::rgba8>,
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span_gen_type> renderer_type;
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double x0,y0;
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geom.vertex(&x0,&y0);
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geom.rewind(0);
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unsigned offset_x = unsigned(image.width() - x0);
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unsigned offset_y = unsigned(image.height() - y0);
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agg::span_allocator<agg::rgba8> sa;
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img_source_type img_src(pattern_rbuf);
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span_gen_type sg(img_src, offset_x, offset_y);
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renderer_type rp(renb,sa, sg);
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agg::rasterizer_scanline_aa<> ras;
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agg::scanline_u8 sl;
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ras.clip_box(0,0,image.width(),image.height());
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ras.add_path(geom);
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agg::render_scanlines(ras, sl, rp);
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}
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}
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