466 lines
18 KiB
C++
466 lines
18 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) 2006 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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#include "agg_renderer.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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#include "agg_conv_stroke.h"
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#include "agg_conv_dash.h"
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#include "agg_conv_contour.h"
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#include "agg_vcgen_stroke.h"
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#include "agg_conv_adaptor_vcgen.h"
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#include "agg_conv_smooth_poly1.h"
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#include "agg_conv_marker.h"
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#include "agg_arrowhead.h"
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#include "agg_vcgen_markers_term.h"
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#include "agg_renderer_outline_aa.h"
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#include "agg_rasterizer_outline_aa.h"
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#include "agg_rasterizer_outline.h"
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#include "agg_renderer_outline_image.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_renderer_scanline.h"
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#include "agg_pattern_filters_rgba.h"
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#include "agg_renderer_outline_image.h"
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#include <boost/utility.hpp>
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#include <iostream>
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#include "image_util.hpp"
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namespace mapnik
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{
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class pattern_source : private boost::noncopyable
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{
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public:
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pattern_source(ImageData32 const& pattern)
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: pattern_(pattern) {}
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unsigned int width() const
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{
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return pattern_.width();
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}
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unsigned int height() const
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{
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return pattern_.height();
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}
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agg::rgba8 pixel(int x, int y) const
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{
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unsigned c = pattern_(x,y);
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return agg::rgba8(c & 0xff, (c >> 8) & 0xff, (c >> 16) & 0xff,(c >> 24) & 0xff);
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}
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private:
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ImageData32 const& pattern_;
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};
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template <typename T>
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agg_renderer<T>::agg_renderer(Map const& m, T & pixmap)
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: feature_style_processor<agg_renderer>(m),
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pixmap_(pixmap),
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t_(m.getWidth(),m.getHeight(),m.getCurrentExtent()),
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detector_(Envelope<double>(-64 ,-64, m.getWidth() + 64 ,m.getHeight() + 64))
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{
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Color const& bg=m.getBackground();
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pixmap_.setBackground(bg);
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std::clog << "scale="<<m.scale()<<std::endl;
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}
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template <typename T>
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void agg_renderer<T>::start_map_processing(Map const& map)
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{
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std::clog << "start map processing bbox=" << map.getCurrentExtent() << std::endl;
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}
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template <typename T>
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void agg_renderer<T>::end_map_processing(Map const& )
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{
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std::clog << "end map processing" << std::endl;
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}
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template <typename T>
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void agg_renderer<T>::start_layer_processing(Layer const& lay)
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{
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std::clog << "start layer processing : " << lay.name() << std::endl;
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std::clog << "datasource = " << lay.datasource().get() << std::endl;
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}
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template <typename T>
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void agg_renderer<T>::end_layer_processing(Layer const&)
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{
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std::clog << "end layer processing" << std::endl;
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}
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template <typename T>
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void agg_renderer<T>::process(polygon_symbolizer const& sym,Feature const& feature)
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{
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typedef coord_transform<CoordTransform,geometry_type> path_type;
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typedef agg::renderer_base<agg::pixfmt_rgba32> ren_base;
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typedef agg::renderer_scanline_aa_solid<ren_base> renderer;
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Color const& fill_ = sym.get_fill();
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geometry_ptr const& geom=feature.get_geometry();
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if (geom && geom->num_points() > 2)
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{
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unsigned width = pixmap_.width();
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unsigned height = pixmap_.height();
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path_type path(t_,*geom);
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agg::row_ptr_cache<agg::int8u> buf(pixmap_.raw_data(),width,height,width * 4);
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agg::pixfmt_rgba32 pixf(buf);
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ren_base renb(pixf);
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unsigned r=fill_.red();
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unsigned g=fill_.green();
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unsigned b=fill_.blue();
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//unsigned a=fill_.alpha();
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renderer ren(renb);
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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,width,height);
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ras.add_path(path);
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ren.color(agg::rgba8(r, g, b, int(255 * sym.get_opacity())));
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agg::render_scanlines(ras, sl, ren);
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}
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}
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template <typename T>
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void agg_renderer<T>::process(line_symbolizer const& sym,Feature const& feature)
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{
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typedef agg::renderer_base<agg::pixfmt_rgba32> ren_base;
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typedef coord_transform<CoordTransform,geometry_type> path_type;
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typedef agg::renderer_outline_aa<ren_base> renderer_oaa;
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typedef agg::rasterizer_outline_aa<renderer_oaa> rasterizer_outline_aa;
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typedef agg::renderer_scanline_aa_solid<ren_base> renderer;
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geometry_ptr const& geom=feature.get_geometry();
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if (geom && geom->num_points() > 1)
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{
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path_type path(t_,*geom);
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agg::row_ptr_cache<agg::int8u> buf(pixmap_.raw_data(),pixmap_.width(),pixmap_.height(),
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pixmap_.width()*4);
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agg::pixfmt_rgba32 pixf(buf);
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ren_base renb(pixf);
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mapnik::stroke const& stroke_ = sym.get_stroke();
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Color const& col = stroke_.get_color();
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unsigned r=col.red();
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unsigned g=col.green();
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unsigned b=col.blue();
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if (stroke_.has_dash())
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{
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renderer ren(renb);
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agg::rasterizer_scanline_aa<> ras;
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agg::scanline_u8 sl;
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agg::conv_dash<path_type> dash(path);
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dash_array const& d = stroke_.get_dash_array();
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dash_array::const_iterator itr = d.begin();
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dash_array::const_iterator end = d.end();
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while (itr != end)
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{
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dash.add_dash(itr->first, itr->second);
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++itr;
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}
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agg::conv_stroke<agg::conv_dash<path_type > > stroke(dash);
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line_join_e join=stroke_.get_line_join();
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if ( join == MITER_JOIN)
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stroke.generator().line_join(agg::miter_join);
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else if( join == MITER_REVERT_JOIN)
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stroke.generator().line_join(agg::miter_join);
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else if( join == ROUND_JOIN)
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stroke.generator().line_join(agg::round_join);
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else
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stroke.generator().line_join(agg::bevel_join);
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line_cap_e cap=stroke_.get_line_cap();
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if (cap == BUTT_CAP)
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stroke.generator().line_cap(agg::butt_cap);
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else if (cap == SQUARE_CAP)
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stroke.generator().line_cap(agg::square_cap);
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else
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stroke.generator().line_cap(agg::round_cap);
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stroke.generator().miter_limit(4.0);
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stroke.generator().width(stroke_.get_width());
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ras.clip_box(0,0,pixmap_.width(),pixmap_.height());
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ras.add_path(stroke);
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ren.color(agg::rgba8(r, g, b, int(255*stroke_.get_opacity())));
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agg::render_scanlines(ras, sl, ren);
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}
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else if (stroke_.get_width() <= 1.0)
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{
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agg::line_profile_aa prof;
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prof.width(stroke_.get_width());
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renderer_oaa ren_oaa(renb, prof);
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rasterizer_outline_aa ras_oaa(ren_oaa);
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ren_oaa.color(agg::rgba8(r, g, b, int(255*stroke_.get_opacity())));
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ren_oaa.clip_box(0,0,pixmap_.width(),pixmap_.height());
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ras_oaa.add_path(path);
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}
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else
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{
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renderer ren(renb);
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agg::rasterizer_scanline_aa<> ras;
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agg::scanline_p8 sl;
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agg::conv_stroke<path_type> stroke(path);
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line_join_e join=stroke_.get_line_join();
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if ( join == MITER_JOIN)
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stroke.generator().line_join(agg::miter_join);
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else if( join == MITER_REVERT_JOIN)
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stroke.generator().line_join(agg::miter_join);
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else if( join == ROUND_JOIN)
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stroke.generator().line_join(agg::round_join);
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else
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stroke.generator().line_join(agg::bevel_join);
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line_cap_e cap=stroke_.get_line_cap();
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if (cap == BUTT_CAP)
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stroke.generator().line_cap(agg::butt_cap);
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else if (cap == SQUARE_CAP)
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stroke.generator().line_cap(agg::square_cap);
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else
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stroke.generator().line_cap(agg::round_cap);
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stroke.generator().miter_limit(4.0);
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stroke.generator().width(stroke_.get_width());
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ras.clip_box(0,0,pixmap_.width(),pixmap_.height());
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ras.add_path(stroke);
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ren.color(agg::rgba8(r, g, b, int(255*stroke_.get_opacity())));
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agg::render_scanlines(ras, sl, ren);
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}
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}
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}
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template <typename T>
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void agg_renderer<T>::process(point_symbolizer const& sym,Feature const& feature)
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{
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geometry_ptr const& geom=feature.get_geometry();
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if (geom)
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{
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double x;
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double y;
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boost::shared_ptr<ImageData32> const& data = sym.get_data();
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if ( data )
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{
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geom->label_position(&x,&y);
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t_.forward_x(&x);
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t_.forward_y(&y);
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int w = data->width();
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int h = data->height();
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int px=int(floor(x - 0.5 * w));
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int py=int(floor(y - 0.5 * h));
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if (sym.get_allow_overlap() ||
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detector_.has_placement(Envelope<double>(floor(x - 0.5 * w),
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floor(y - 0.5 * h),
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ceil (x + 0.5 * w),
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ceil (y + 0.5 * h))))
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{
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pixmap_.set_rectangle_alpha(px,py,*data);
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}
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}
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}
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}
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template <typename T>
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void agg_renderer<T>::process(line_pattern_symbolizer const& sym,Feature const& feature)
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{
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typedef coord_transform<CoordTransform,geometry_type> path_type;
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typedef agg::line_image_pattern<agg::pattern_filter_bilinear_rgba8> pattern_type;
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typedef agg::renderer_base<agg::pixfmt_rgba32> renderer_base;
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typedef agg::renderer_outline_image<renderer_base, pattern_type> renderer_type;
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typedef agg::rasterizer_outline_aa<renderer_type> rasterizer_type;
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geometry_ptr const& geom=feature.get_geometry();
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if (geom && geom->num_points() > 1)
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{
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unsigned width = pixmap_.width();
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unsigned height = pixmap_.height();
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ImageData32 const& pat = sym.get_pattern();
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path_type path(t_,*geom);
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agg::row_ptr_cache<agg::int8u> buf(pixmap_.raw_data(), width, height,width*4);
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agg::pixfmt_rgba32 pixf(buf);
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renderer_base ren_base(pixf);
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agg::pattern_filter_bilinear_rgba8 filter;
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pattern_source source(pat);
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pattern_type pattern (filter,source);
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renderer_type ren(ren_base, pattern);
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ren.clip_box(0,0,width,height);
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rasterizer_type ras(ren);
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ras.add_path(path);
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}
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}
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template <typename T>
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void agg_renderer<T>::process(polygon_pattern_symbolizer const& sym,Feature const& feature)
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{
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typedef coord_transform<CoordTransform,geometry_type> path_type;
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typedef agg::renderer_base<agg::pixfmt_rgba32> 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::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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geometry_ptr const& geom=feature.get_geometry();
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if (geom && geom->num_points() > 2)
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{
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ImageData32 const& pattern = sym.get_pattern();
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unsigned width = pixmap_.width();
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unsigned height = pixmap_.height();
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path_type path(t_,*geom);
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agg::row_ptr_cache<agg::int8u> buf(pixmap_.raw_data(),width,height,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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double x0,y0;
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path.vertex(&x0,&y0);
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path.rewind(0);
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unsigned offset_x = unsigned(width - x0);
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unsigned offset_y = unsigned(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,width,height);
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ras.add_path(path);
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agg::render_scanlines(ras, sl, rp);
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}
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}
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template <typename T>
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void agg_renderer<T>::process(raster_symbolizer const& ,Feature const& feature)
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{
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// TODO -- at the moment raster_symbolizer is an empty class
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// used for type dispatching, but we can have some fancy raster
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// processing in a future (filters??). Just copy raster into pixmap for now.
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raster_ptr const& raster=feature.get_raster();
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if (raster)
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{
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Envelope<double> ext=t_.forward(raster->ext_);
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ImageData32 target((int)(ext.width() + 0.5),(int)(ext.height() + 0.5));
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scale_image<ImageData32>(target,raster->data_);
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pixmap_.set_rectangle(int(ext.minx()),int(ext.miny()),target);
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}
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}
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template <typename T>
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void agg_renderer<T>::process(text_symbolizer const& sym ,Feature const& feature)
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{
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typedef coord_transform<CoordTransform,geometry_type> path_type;
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geometry_ptr const& geom=feature.get_geometry();
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if (geom)
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{
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double angle = 0.0;
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if (sym.get_label_placement() == line_placement &&
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geom->num_points() > 1)
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{
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path_type path(t_,*geom);
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double x0,y0,x1,y1;
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path.vertex(&x0,&y0);
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path.vertex(&x1,&y1);
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double dx = x1 - x0;
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double dy = ( y1 - y0 > 1e-7 ) ? y1 - y0 : 1.0;
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angle = atan( dx/ dy ) - 0.5 * 3.1459;
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//TODO!!!!!!!!!!!!!!!!!!!!
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}
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std::string text = feature[sym.get_name()].to_string();
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if (text.length() > 0)
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{
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Color const& fill = sym.get_fill();
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double x;
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double y;
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geom->label_position(&x,&y);
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t_.forward_x(&x);
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t_.forward_y(&y);
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face_ptr face = font_manager_.get_face("Bitstream Vera Sans Roman");//TODO
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//face_ptr face = font_manager_.get_face("Times New Roman Regular");//TODO
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if (face)
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{
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text_renderer<mapnik::Image32> ren(pixmap_,face);
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ren.set_pixel_size(sym.get_text_size());
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ren.set_fill(fill);
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ren.set_halo_fill(sym.get_halo_fill());
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ren.set_halo_radius(sym.get_halo_radius());
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ren.set_angle(float(angle));
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std::pair<unsigned,unsigned> dim = ren.prepare_glyphs(text);
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Envelope<double> text_box(x - 0.5*dim.first,y - 0.5 * dim.second ,
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x + 0.5*dim.first,y + 0.5 * dim.second);
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if (sym.get_halo_radius() > 0)
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{
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text_box.width(text_box.width() + sym.get_halo_radius()*2);
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text_box.height(text_box.height() + sym.get_halo_radius()*2);
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}
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if (detector_.has_placement(text_box))
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{
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ren.render(x - 0.5 * dim.first,y + 0.5 * dim.second);
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}
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}
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}
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}
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}
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template class agg_renderer<Image32>;
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}
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