136 lines
4.5 KiB
C++
136 lines
4.5 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2010 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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//$Id$
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// mapnik
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#include <mapnik/agg_renderer.hpp>
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#include <mapnik/agg_rasterizer.hpp>
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#include <mapnik/marker_cache.hpp>
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// agg
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#include "agg_basics.h"
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#include "agg_rendering_buffer.h"
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#include "agg_pixfmt_rgba.h"
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#include "agg_rasterizer_scanline_aa.h"
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#include "agg_scanline_u.h"
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// for polygon_pattern_symbolizer
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#include "agg_renderer_scanline.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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template <typename T>
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void agg_renderer<T>::process(polygon_pattern_symbolizer const& sym,
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Feature const& feature,
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proj_transform const& prj_trans)
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{
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typedef coord_transform2<CoordTransform,geometry_type> path_type;
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typedef agg::renderer_base<agg::pixfmt_rgba32_plain> ren_base;
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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::pixfmt_alpha_blend_rgba<agg::blender_rgba32,
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agg::row_accessor<agg::int8u>, agg::pixel32_type> rendering_buffer;
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typedef agg::image_accessor_wrap<rendering_buffer,
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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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agg::rendering_buffer buf(pixmap_.raw_data(),width_,height_, width_ * 4);
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agg::pixfmt_rgba32_plain pixf(buf);
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ren_base renb(pixf);
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agg::scanline_u8 sl;
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ras_ptr->reset();
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ras_ptr->gamma(agg::gamma_linear());
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std::string filename = path_processor_type::evaluate( *sym.get_filename(), feature);
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boost::optional<mapnik::marker_ptr> marker;
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if ( !filename.empty() )
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{
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marker = marker_cache::instance()->find(filename, true);
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}
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if (!marker || !(*marker)->is_bitmap()) return;
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boost::optional<image_ptr> pat = (*marker)->get_bitmap_data();
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if (!pat) return;
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unsigned w=(*pat)->width();
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unsigned h=(*pat)->height();
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agg::row_accessor<agg::int8u> pattern_rbuf((agg::int8u*)(*pat)->getBytes(),w,h,w*4);
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agg::span_allocator<agg::rgba8> sa;
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agg::pixfmt_alpha_blend_rgba<agg::blender_rgba32,
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agg::row_accessor<agg::int8u>, agg::pixel32_type> pixf_pattern(pattern_rbuf);
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img_source_type img_src(pixf_pattern);
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unsigned num_geometries = feature.num_geometries();
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pattern_alignment_e align = sym.get_alignment();
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unsigned offset_x=0;
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unsigned offset_y=0;
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if (align == LOCAL_ALIGNMENT)
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{
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double x0=0,y0=0;
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if (num_geometries>0)
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{
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path_type path(t_,feature.get_geometry(0),prj_trans);
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path.vertex(&x0,&y0);
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}
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offset_x = unsigned(width_-x0);
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offset_y = unsigned(height_-y0);
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}
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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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metawriter_with_properties writer = sym.get_metawriter();
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for (unsigned i=0;i<num_geometries;++i)
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{
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geometry_type const& geom = feature.get_geometry(i);
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if (geom.num_points() > 2)
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{
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path_type path(t_,geom,prj_trans);
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ras_ptr->add_path(path);
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if (writer.first) writer.first->add_polygon(path, feature, t_, writer.second);
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}
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}
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agg::render_scanlines(*ras_ptr, sl, rp);
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}
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template void agg_renderer<image_32>::process(polygon_pattern_symbolizer const&,
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Feature const&,
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proj_transform const&);
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}
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