482 lines
16 KiB
C++
482 lines
16 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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// 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/graphics.hpp>
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#include <mapnik/debug.hpp>
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#include <mapnik/layer.hpp>
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#include <mapnik/feature_type_style.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_agg.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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#include <mapnik/image_filter.hpp>
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#include <mapnik/image_util.hpp>
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// agg
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#define AGG_RENDERING_BUFFER row_ptr_cache<int8u>
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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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#include "agg_image_filters.h"
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#include "agg_trans_bilinear.h"
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#include "agg_span_allocator.h"
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#include "agg_image_accessors.h"
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#include "agg_span_image_filter_rgba.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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#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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style_level_compositing_(false),
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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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style_level_compositing_(false),
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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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composite(pixmap_.data(),*bg_image, src_over, 1.0f, x*w, y*h, true);
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}
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}
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}
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}
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}
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agg::rendering_buffer buf(pixmap_.raw_data(),width_,height_, width_ * 4);
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agg::pixfmt_rgba32 pixf(buf);
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pixf.premultiply();
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MAPNIK_LOG_DEBUG(agg_renderer) << "agg_renderer: Scale=" << m.scale();
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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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MAPNIK_LOG_DEBUG(agg_renderer) << "agg_renderer: Start map processing bbox=" << map.get_current_extent();
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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(pixmap_.raw_data(),width_,height_, width_ * 4);
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agg::pixfmt_rgba32 pixf(buf);
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pixf.demultiply();
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MAPNIK_LOG_DEBUG(agg_renderer) << "agg_renderer: End map processing";
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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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MAPNIK_LOG_DEBUG(agg_renderer) << "agg_renderer: Start processing layer=" << lay.name();
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MAPNIK_LOG_DEBUG(agg_renderer) << "agg_renderer: -- datasource=" << lay.datasource().get();
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MAPNIK_LOG_DEBUG(agg_renderer) << "agg_renderer: -- query_extent=" << query_extent;
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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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int buffer_size = lay.buffer_size();
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if (buffer_size != 0 )
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{
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double padding = buffer_size * (double)(query_extent.width()/pixmap_.width());
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double x0 = query_extent_.minx();
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double y0 = query_extent_.miny();
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double x1 = query_extent_.maxx();
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double y1 = query_extent_.maxy();
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query_extent_.init(x0 - padding, y0 - padding, x1 + padding , y1 + padding);
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}
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boost::optional<box2d<double> > const& maximum_extent = lay.maximum_extent();
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if (maximum_extent)
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{
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query_extent_.clip(*maximum_extent);
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}
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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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MAPNIK_LOG_DEBUG(agg_renderer) << "agg_renderer: End layer processing";
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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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MAPNIK_LOG_DEBUG(agg_renderer) << "agg_renderer: Start processing style";
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if (st.comp_op() || st.image_filters().size() > 0 || st.get_opacity() < 1)
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{
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style_level_compositing_ = true;
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}
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else
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{
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style_level_compositing_ = false;
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}
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if (style_level_compositing_)
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{
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if (!internal_buffer_)
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{
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internal_buffer_ = boost::make_shared<buffer_type>(pixmap_.width(),pixmap_.height());
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}
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else
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{
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internal_buffer_->set_background(color(0,0,0,0)); // fill with transparent colour
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}
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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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if (style_level_compositing_)
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{
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bool blend_from = false;
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if (st.image_filters().size() > 0)
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{
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blend_from = true;
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mapnik::filter::filter_visitor<image_32> visitor(*current_buffer_);
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BOOST_FOREACH(mapnik::filter::filter_type const& 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())
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{
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composite(pixmap_.data(),current_buffer_->data(), *st.comp_op(), st.get_opacity(), 0, 0, false);
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}
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else if (blend_from || st.get_opacity() < 1)
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{
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composite(pixmap_.data(),current_buffer_->data(), src_over, st.get_opacity(), 0, 0, false);
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}
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// apply any 'direct' image filters
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mapnik::filter::filter_visitor<image_32> visitor(pixmap_);
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BOOST_FOREACH(mapnik::filter::filter_type const& filter_tag, st.direct_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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MAPNIK_LOG_DEBUG(agg_renderer) << "agg_renderer: End processing style";
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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,
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double opacity, composite_mode_e comp_op)
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{
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typedef agg::rgba8 color_type;
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typedef agg::order_rgba order_type;
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typedef agg::pixel32_type pixel_type;
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typedef agg::comp_op_adaptor_rgba<color_type, order_type> blender_type; // comp blender
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typedef agg::pixfmt_custom_blend_rgba<blender_type, agg::rendering_buffer> pixfmt_comp_type;
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typedef agg::renderer_base<pixfmt_comp_type> renderer_base;
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typedef agg::renderer_scanline_aa_solid<renderer_base> renderer_type;
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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(current_buffer_->raw_data(), width_, height_, width_ * 4);
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pixfmt_comp_type pixf(buf);
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pixf.comp_op(static_cast<agg::comp_op_e>(comp_op));
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renderer_base renb(pixf);
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if (marker.is_vector())
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{
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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, pos.y);
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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_agg<svg_path_adapter,
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agg::pod_bvector<path_attributes>,
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renderer_type,
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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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double width = (*marker.get_bitmap_data())->width();
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double height = (*marker.get_bitmap_data())->height();
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double cx = 0.5 * width;
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double cy = 0.5 * height;
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if (std::fabs(1.0 - scale_factor_) < 0.001 && tr.is_identity())
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{
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composite(current_buffer_->data(), **marker.get_bitmap_data(),
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comp_op, opacity,
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boost::math::iround(pos.x - cx),
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boost::math::iround(pos.y - cy),
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false);
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}
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else
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{
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double p[8];
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double x0 = pos.x - 0.5 * width;
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double y0 = pos.y - 0.5 * height;
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p[0] = x0; p[1] = y0;
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p[2] = x0 + width; p[3] = y0;
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p[4] = x0 + width; p[5] = y0 + height;
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p[6] = x0; p[7] = y0 + height;
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agg::trans_affine marker_tr;
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marker_tr *= agg::trans_affine_translation(-pos.x,-pos.y);
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marker_tr *= tr;
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marker_tr *= agg::trans_affine_scaling(scale_factor_);
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marker_tr *= agg::trans_affine_translation(pos.x,pos.y);
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marker_tr.transform(&p[0], &p[1]);
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marker_tr.transform(&p[2], &p[3]);
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marker_tr.transform(&p[4], &p[5]);
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marker_tr.transform(&p[6], &p[7]);
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ras_ptr->move_to_d(p[0],p[1]);
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ras_ptr->line_to_d(p[2],p[3]);
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ras_ptr->line_to_d(p[4],p[5]);
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ras_ptr->line_to_d(p[6],p[7]);
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agg::span_allocator<color_type> sa;
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agg::image_filter_bilinear filter_kernel;
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agg::image_filter_lut filter(filter_kernel, false);
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image_data_32 const& src = **marker.get_bitmap_data();
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agg::rendering_buffer marker_buf((unsigned char *)src.getBytes(),
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src.width(),
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src.height(),
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src.width()*4);
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agg::pixfmt_rgba32_pre pixf(marker_buf);
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typedef agg::image_accessor_clone<agg::pixfmt_rgba32_pre> img_accessor_type;
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typedef agg::span_interpolator_linear<agg::trans_affine> interpolator_type;
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typedef agg::span_image_filter_rgba_2x2<img_accessor_type,
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interpolator_type> span_gen_type;
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typedef agg::renderer_scanline_aa_alpha<renderer_base,
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agg::span_allocator<agg::rgba8>,
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span_gen_type> renderer_type;
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img_accessor_type ia(pixf);
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interpolator_type interpolator(agg::trans_affine(p, 0, 0, width, height) );
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span_gen_type sg(ia, interpolator, filter);
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renderer_type rp(renb,sa, sg, unsigned(opacity*255));
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agg::render_scanlines(*ras_ptr, sl, rp);
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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>::painted(bool painted)
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{
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pixmap_.painted(painted);
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}
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template <typename T>
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void agg_renderer<T>::debug_draw_box(box2d<double> const& box,
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double x, double y, double angle)
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{
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agg::rendering_buffer buf(pixmap_.raw_data(), width_, height_, width_ * 4);
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debug_draw_box(buf, box, x, y, angle);
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}
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template <typename T> template <typename R>
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void agg_renderer<T>::debug_draw_box(R& buf, box2d<double> const& box,
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double x, double y, double angle)
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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_type;
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agg::scanline_p8 sl_line;
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pixfmt pixf(buf);
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renderer_base renb(pixf);
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renderer_type ren(renb);
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// compute tranformation matrix
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agg::trans_affine tr = agg::trans_affine_rotation(angle).translate(x, y);
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// prepare path
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agg::path_storage pbox;
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pbox.start_new_path();
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pbox.move_to(box.minx(), box.miny());
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pbox.line_to(box.maxx(), box.miny());
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pbox.line_to(box.maxx(), box.maxy());
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pbox.line_to(box.minx(), box.maxy());
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pbox.line_to(box.minx(), box.miny());
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// prepare stroke with applied transformation
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typedef agg::conv_transform<agg::path_storage> conv_transform;
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typedef agg::conv_stroke<conv_transform> conv_stroke;
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conv_transform tbox(pbox, tr);
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conv_stroke sbox(tbox);
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sbox.generator().width(1.0 * scale_factor_);
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// render the outline
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ras_ptr->reset();
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ras_ptr->add_path(sbox);
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ren.color(agg::rgba8(0x33, 0x33, 0xff, 0xcc)); // blue is fine
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agg::render_scanlines(*ras_ptr, sl_line, ren);
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}
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template <typename T>
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void agg_renderer<T>::draw_geo_extent(box2d<double> const& extent, mapnik::color const& color)
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{
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box2d<double> box = t_.forward(extent);
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double x0 = box.minx();
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double x1 = box.maxx();
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double y0 = box.miny();
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double y1 = box.maxy();
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unsigned rgba = color.rgba();
|
|
for (double x=x0; x<x1; x++)
|
|
{
|
|
pixmap_.setPixel(x, y0, rgba);
|
|
pixmap_.setPixel(x, y1, rgba);
|
|
}
|
|
for (double y=y0; y<y1; y++)
|
|
{
|
|
pixmap_.setPixel(x0, y, rgba);
|
|
pixmap_.setPixel(x1, y, rgba);
|
|
}
|
|
}
|
|
|
|
template class agg_renderer<image_32>;
|
|
template void agg_renderer<image_32>::debug_draw_box<agg::rendering_buffer>(
|
|
agg::rendering_buffer& buf,
|
|
box2d<double> const& box,
|
|
double x, double y, double angle);
|
|
}
|