313 lines
10 KiB
C++
313 lines
10 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) 2011 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/agg_helpers.hpp>
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#include <mapnik/marker.hpp>
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#include <mapnik/marker_cache.hpp>
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#include <mapnik/unicode.hpp>
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#include <mapnik/font_set.hpp>
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#include <mapnik/parse_path.hpp>
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#include <mapnik/map.hpp>
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#include <mapnik/svg/svg_converter.hpp>
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#include <mapnik/svg/svg_renderer.hpp>
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#include <mapnik/svg/svg_path_adapter.hpp>
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#include <mapnik/image_compositing.hpp>
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// agg
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#define AGG_RENDERING_BUFFER row_ptr_cache<int8u>
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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_scanline_u.h"
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// boost
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#include <boost/utility.hpp>
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#include <boost/make_shared.hpp>
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#include <boost/math/special_functions/round.hpp>
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// stl
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#ifdef MAPNIK_DEBUG
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#include <iostream>
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#endif
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#include <cmath>
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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(image_data_32 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,
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(c >> 8) & 0xff,
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(c >> 16) & 0xff,
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(c >> 24) & 0xff);
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}
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private:
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image_data_32 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, double scale_factor, unsigned offset_x, unsigned offset_y)
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: feature_style_processor<agg_renderer>(m, scale_factor),
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pixmap_(pixmap),
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internal_buffer_(),
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current_buffer_(&pixmap),
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width_(pixmap_.width()),
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height_(pixmap_.height()),
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scale_factor_(scale_factor),
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t_(m.width(),m.height(),m.get_current_extent(),offset_x,offset_y),
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font_engine_(),
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font_manager_(font_engine_),
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detector_(boost::make_shared<label_collision_detector4>(box2d<double>(-m.buffer_size(), -m.buffer_size(), m.width() + m.buffer_size() ,m.height() + m.buffer_size()))),
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ras_ptr(new rasterizer)
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{
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setup(m);
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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, boost::shared_ptr<label_collision_detector4> detector,
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double scale_factor, unsigned offset_x, unsigned offset_y)
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: feature_style_processor<agg_renderer>(m, scale_factor),
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pixmap_(pixmap),
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internal_buffer_(),
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current_buffer_(&pixmap),
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width_(pixmap_.width()),
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height_(pixmap_.height()),
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scale_factor_(scale_factor),
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t_(m.width(),m.height(),m.get_current_extent(),offset_x,offset_y),
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font_engine_(),
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font_manager_(font_engine_),
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detector_(detector),
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ras_ptr(new rasterizer)
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{
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setup(m);
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}
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template <typename T>
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void agg_renderer<T>::setup(Map const &m)
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{
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boost::optional<color> const& bg = m.background();
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if (bg) pixmap_.set_background(*bg);
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boost::optional<std::string> const& image_filename = m.background_image();
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if (image_filename)
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{
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boost::optional<mapnik::marker_ptr> bg_marker = mapnik::marker_cache::instance()->find(*image_filename,true);
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if (bg_marker && (*bg_marker)->is_bitmap())
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{
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mapnik::image_ptr bg_image = *(*bg_marker)->get_bitmap_data();
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int w = bg_image->width();
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int h = bg_image->height();
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if ( w > 0 && h > 0)
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{
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// repeat background-image both vertically and horizontally
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unsigned x_steps = unsigned(std::ceil(width_/double(w)));
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unsigned y_steps = unsigned(std::ceil(height_/double(h)));
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for (unsigned x=0;x<x_steps;++x)
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{
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for (unsigned y=0;y<y_steps;++y)
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{
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pixmap_.set_rectangle_alpha2(*bg_image, x*w, y*h, 1.0f);
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}
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}
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}
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}
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}
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#ifdef MAPNIK_DEBUG
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std::clog << "scale=" << m.scale() << "\n";
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#endif
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}
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template <typename T>
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agg_renderer<T>::~agg_renderer() {}
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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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#ifdef MAPNIK_DEBUG
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std::clog << "start map processing bbox="
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<< map.get_current_extent() << "\n";
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#endif
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ras_ptr->clip_box(0,0,width_,height_);
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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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agg::rendering_buffer buf(current_buffer_->raw_data(),width_,height_, width_ * 4);
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aa_renderer::pixel_format_type pixf(buf);
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pixf.demultiply();
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#ifdef MAPNIK_DEBUG
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std::clog << "end map processing\n";
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#endif
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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, box2d<double> const& query_extent)
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{
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#ifdef MAPNIK_DEBUG
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std::clog << "start layer processing : " << lay.name() << "\n";
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std::clog << "datasource = " << lay.datasource().get() << "\n";
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std::clog << "query_extent = " << query_extent << "\n";
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#endif
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// set current_buffer
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if (lay.clear_label_cache())
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{
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detector_->clear();
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}
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query_extent_ = query_extent;
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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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#ifdef MAPNIK_DEBUG
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std::clog << "end layer processing\n";
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#endif
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}
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template <typename T>
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void agg_renderer<T>::start_style_processing(feature_type_style const& st)
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{
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#ifdef MAPNIK_DEBUG
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std::clog << "start style processing\n";
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#endif
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if (st.comp_op() != clear || st.image_filters().size() > 0)
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{
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if (!internal_buffer_)
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internal_buffer_ = boost::make_shared<buffer_type>(pixmap_.width(),pixmap_.height());
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else
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internal_buffer_->set_background(color(0,0,0,0)); // transparent
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current_buffer_ = internal_buffer_.get();
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}
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else
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{
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current_buffer_ = &pixmap_;
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}
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}
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template <typename T>
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void agg_renderer<T>::end_style_processing(feature_type_style const& st)
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{
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bool blend = false;
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if (st.image_filters().size() > 0)
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{
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blend = true;
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mapnik::filter::filter_visitor<image_32> visitor(*current_buffer_);
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BOOST_FOREACH(mapnik::filter::filter_type filter_tag, st.image_filters())
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{
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boost::apply_visitor(visitor, filter_tag);
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}
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}
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if (st.comp_op() != clear) // compositing FIXME: add 'none' to comp-op enum
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{
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composite(pixmap_.data(),current_buffer_->data(), st.comp_op(),false,false);
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}
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else if (blend)
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{
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agg::rendering_buffer in(current_buffer_->raw_data(), current_buffer_->width(),
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current_buffer_->height(), current_buffer_->width() * 4);
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agg::rendering_buffer out(pixmap_.raw_data(), pixmap_.width(),
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pixmap_.height(), pixmap_.width() * 4);
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agg::pixfmt_rgba32 pixf_in(in);
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agg::pixfmt_rgba32 pixf_out(out);
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agg::renderer_base<agg::pixfmt_rgba32> ren(pixf_out);
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ren.blend_from(pixf_in,0,0,0,255);
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}
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#ifdef MAPNIK_DEBUG
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std::clog << "end style processing\n";
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#endif
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}
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template <typename T>
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void agg_renderer<T>::render_marker(pixel_position const& pos, marker const& marker, agg::trans_affine const& tr, double opacity)
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{
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if (marker.is_vector())
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{
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typedef agg::pixfmt_rgba32 pixfmt;
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typedef agg::renderer_base<pixfmt> renderer_base;
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typedef agg::renderer_scanline_aa_solid<renderer_base> renderer_solid;
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ras_ptr->reset();
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ras_ptr->gamma(agg::gamma_power());
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agg::scanline_u8 sl;
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agg::rendering_buffer buf(pixmap_.raw_data(), width_, height_, width_ * 4);
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pixfmt pixf(buf);
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renderer_base renb(pixf);
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box2d<double> const& bbox = (*marker.get_vector_data())->bounding_box();
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coord<double,2> c = bbox.center();
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// center the svg marker on '0,0'
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agg::trans_affine mtx = agg::trans_affine_translation(-c.x,-c.y);
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// apply symbol transformation to get to map space
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mtx *= tr;
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mtx *= agg::trans_affine_scaling(scale_factor_);
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// render the marker at the center of the marker box
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mtx.translate(pos.x+0.5 * marker.width(), pos.y+0.5 * marker.height());
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using namespace mapnik::svg;
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vertex_stl_adapter<svg_path_storage> stl_storage((*marker.get_vector_data())->source());
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svg_path_adapter svg_path(stl_storage);
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svg_renderer<svg_path_adapter,
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agg::pod_bvector<path_attributes>,
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renderer_solid,
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agg::pixfmt_rgba32> svg_renderer(svg_path,
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(*marker.get_vector_data())->attributes());
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svg_renderer.render(*ras_ptr, sl, renb, mtx, opacity, bbox);
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}
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else
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{
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//TODO: Add subpixel support
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pixmap_.set_rectangle_alpha2(**marker.get_bitmap_data(),
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boost::math::iround(pos.x),
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boost::math::iround(pos.y),
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opacity);
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}
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}
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template class agg_renderer<image_32>;
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}
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