1271 lines
40 KiB
C++
1271 lines
40 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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#if defined(HAVE_CAIRO)
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// mapnik
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#include <mapnik/cairo_renderer.hpp>
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#include <mapnik/image_util.hpp>
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#include <mapnik/unicode.hpp>
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#include <mapnik/markers_placement.hpp>
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#include <mapnik/arrow.hpp>
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#include <mapnik/parse_path.hpp>
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#include <mapnik/marker_cache.hpp>
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#include <mapnik/svg/svg_path_adapter.hpp>
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#include <mapnik/svg/svg_path_attributes.hpp>
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#include <mapnik/segment.hpp>
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#include <mapnik/symbolizer_helpers.hpp>
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#include <mapnik/expression_evaluator.hpp>
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#include <mapnik/warp.hpp>
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#include <mapnik/config.hpp>
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#include <mapnik/text_path.hpp>
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// cairo
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#include <cairomm/context.h>
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#include <cairomm/surface.h>
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#include <cairo-ft.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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// stl
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#ifdef MAPNIK_DEBUG
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#include <iostream>
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#endif
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namespace mapnik
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{
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class cairo_pattern : private boost::noncopyable
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{
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public:
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cairo_pattern(image_data_32 const& data)
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{
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int pixels = data.width() * data.height();
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const unsigned int *in_ptr = data.getData();
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const unsigned int *in_end = in_ptr + pixels;
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unsigned int *out_ptr;
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surface_ = Cairo::ImageSurface::create(Cairo::FORMAT_ARGB32, data.width(), data.height());
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out_ptr = reinterpret_cast<unsigned int *>(surface_->get_data());
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while (in_ptr < in_end)
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{
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unsigned int in = *in_ptr++;
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unsigned int r = (in >> 0) & 0xff;
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unsigned int g = (in >> 8) & 0xff;
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unsigned int b = (in >> 16) & 0xff;
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unsigned int a = (in >> 24) & 0xff;
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r = r * a / 255;
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g = g * a / 255;
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b = b * a / 255;
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*out_ptr++ = (a << 24) | (r << 16) | (g << 8) | b;
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}
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// mark the surface as dirty as we've modified it behind cairo's back
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surface_->mark_dirty();
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pattern_ = Cairo::SurfacePattern::create(surface_);
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}
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~cairo_pattern(void)
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{
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}
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void set_matrix(Cairo::Matrix const& matrix)
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{
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pattern_->set_matrix(matrix);
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}
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void set_origin(double x, double y)
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{
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Cairo::Matrix matrix;
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pattern_->get_matrix(matrix);
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matrix.x0 = -x;
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matrix.y0 = -y;
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pattern_->set_matrix(matrix);
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}
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void set_extend(Cairo::Extend extend)
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{
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pattern_->set_extend(extend);
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}
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void set_filter(Cairo::Filter filter)
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{
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pattern_->set_filter(filter);
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}
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Cairo::RefPtr<Cairo::SurfacePattern> const& pattern(void) const
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{
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return pattern_;
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}
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private:
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Cairo::RefPtr<Cairo::ImageSurface> surface_;
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Cairo::RefPtr<Cairo::SurfacePattern> pattern_;
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};
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class cairo_gradient : private boost::noncopyable
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{
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public:
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cairo_gradient(const mapnik::gradient &grad, double opacity=1.0)
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{
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double x1,x2,y1,y2,r;
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grad.get_control_points(x1,y1,x2,y2,r);
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if (grad.get_gradient_type() == LINEAR)
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{
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pattern_ = Cairo::LinearGradient::create(x1, y1, x2, y2);
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}
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else if (grad.get_gradient_type() == RADIAL)
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{
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pattern_ = Cairo::RadialGradient::create(x1, y1, 0, x2, y2, r);
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}
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units_ = grad.get_units();
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BOOST_FOREACH ( mapnik::stop_pair const& st, grad.get_stop_array() )
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{
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mapnik::color const& stop_color = st.second;
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double r= static_cast<double> (stop_color.red())/255.0;
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double g= static_cast<double> (stop_color.green())/255.0;
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double b= static_cast<double> (stop_color.blue())/255.0;
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double a= static_cast<double> (stop_color.alpha())/255.0;
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pattern_->add_color_stop_rgba(st.first, r, g, b, a*opacity);
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}
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double m[6];
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agg::trans_affine tr = grad.get_transform();
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tr.invert();
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tr.store_to(m);
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pattern_->set_matrix(Cairo::Matrix(m[0],m[1],m[2],m[3],m[4],m[5]));
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}
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~cairo_gradient(void)
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{
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}
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Cairo::RefPtr<Cairo::Gradient> const& gradient(void) const
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{
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return pattern_;
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}
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gradient_unit_e units() const
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{
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return units_;
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}
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private:
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Cairo::RefPtr<Cairo::Gradient> pattern_;
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gradient_unit_e units_;
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};
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class cairo_face : private boost::noncopyable
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{
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public:
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cairo_face(boost::shared_ptr<freetype_engine> const& engine, face_ptr const& face)
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: face_(face)
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{
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static cairo_user_data_key_t key;
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cairo_font_face_t *c_face;
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c_face = cairo_ft_font_face_create_for_ft_face(face->get_face(), FT_LOAD_NO_HINTING);
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cairo_font_face_set_user_data(c_face, &key, new handle(engine, face), destroy);
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cairo_face_ = Cairo::RefPtr<Cairo::FontFace>(new Cairo::FontFace(c_face));
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}
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Cairo::RefPtr<Cairo::FontFace> const& face(void) const
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{
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return cairo_face_;
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}
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private:
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class handle
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{
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public:
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handle(boost::shared_ptr<freetype_engine> const& engine, face_ptr const& face)
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: engine_(engine), face_(face) {}
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private:
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boost::shared_ptr<freetype_engine> engine_;
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face_ptr face_;
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};
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static void destroy(void *data)
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{
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handle *h = static_cast<handle *>(data);
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delete h;
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}
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private:
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face_ptr face_;
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Cairo::RefPtr<Cairo::FontFace> cairo_face_;
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};
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cairo_face_manager::cairo_face_manager(boost::shared_ptr<freetype_engine> engine,
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face_manager<freetype_engine> & manager)
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: font_engine_(engine),
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font_manager_(manager)
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{
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}
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cairo_face_ptr cairo_face_manager::get_face(face_ptr face)
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{
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cairo_face_cache::iterator itr = cache_.find(face);
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cairo_face_ptr entry;
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if (itr != cache_.end())
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{
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entry = itr->second;
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}
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else
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{
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entry = cairo_face_ptr(new cairo_face(font_engine_, face));
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cache_.insert(std::make_pair(face, entry));
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}
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return entry;
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}
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class cairo_context : private boost::noncopyable
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{
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public:
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cairo_context(Cairo::RefPtr<Cairo::Context> const& context)
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: context_(context)
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{
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context_->save();
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}
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~cairo_context(void)
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{
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context_->restore();
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}
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void set_color(color const &color, double opacity = 1.0)
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{
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set_color(color.red(), color.green(), color.blue(), color.alpha() * opacity / 255.0);
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}
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void set_color(int r, int g, int b, double opacity = 1.0)
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{
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context_->set_source_rgba(r / 255.0, g / 255.0, b / 255.0, opacity);
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}
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void set_line_join(line_join_e join)
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{
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if (join == MITER_JOIN)
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context_->set_line_join(Cairo::LINE_JOIN_MITER);
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else if (join == MITER_REVERT_JOIN)
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context_->set_line_join(Cairo::LINE_JOIN_MITER);
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else if (join == ROUND_JOIN)
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context_->set_line_join(Cairo::LINE_JOIN_ROUND);
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else
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context_->set_line_join(Cairo::LINE_JOIN_BEVEL);
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}
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void set_line_cap(line_cap_e cap)
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{
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if (cap == BUTT_CAP)
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context_->set_line_cap(Cairo::LINE_CAP_BUTT);
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else if (cap == SQUARE_CAP)
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context_->set_line_cap(Cairo::LINE_CAP_SQUARE);
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else
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context_->set_line_cap(Cairo::LINE_CAP_ROUND);
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}
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void set_miter_limit(double limit)
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{
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context_->set_miter_limit(limit);
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}
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void set_line_width(double width)
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{
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context_->set_line_width(width);
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}
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void set_dash(dash_array const &dashes)
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{
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std::valarray<double> d(dashes.size() * 2);
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dash_array::const_iterator itr = dashes.begin();
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dash_array::const_iterator end = dashes.end();
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int index = 0;
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for (; itr != end; ++itr)
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{
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d[index++] = itr->first;
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d[index++] = itr->second;
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}
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context_->set_dash(d, 0.0);
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}
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void set_fill_rule(Cairo::FillRule fill_rule)
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{
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context_->set_fill_rule(fill_rule);
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}
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void move_to(double x, double y)
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{
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#if CAIRO_VERSION < CAIRO_VERSION_ENCODE(1, 6, 0)
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if (x < -32767.0) x = -32767.0;
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else if (x > 32767.0) x = 32767.0;
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if (y < -32767.0) y = -32767.0;
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else if (y > 32767.0) y = 32767.0;
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#endif
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context_->move_to(x, y);
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}
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void curve_to(double ct1_x, double ct1_y, double ct2_x, double ct2_y, double end_x, double end_y)
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{
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context_->curve_to(ct1_x,ct1_y,ct2_x,ct2_y,end_x,end_y);
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}
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void close_path()
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{
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context_->close_path();
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}
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void line_to(double x, double y)
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{
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#if CAIRO_VERSION < CAIRO_VERSION_ENCODE(1, 6, 0)
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if (x < -32767.0) x = -32767.0;
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else if (x > 32767.0) x = 32767.0;
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if (y < -32767.0) y = -32767.0;
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else if (y > 32767.0) y = 32767.0;
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#endif
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context_->line_to(x, y);
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}
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template <typename T>
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void add_path(T& path, unsigned start_index = 0)
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{
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double x, y;
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path.rewind(start_index);
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for (unsigned cm = path.vertex(&x, &y); cm != SEG_END; cm = path.vertex(&x, &y))
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{
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if (cm == SEG_MOVETO)
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{
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move_to(x, y);
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}
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else if (cm == SEG_LINETO)
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{
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line_to(x, y);
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}
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}
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}
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template <typename T>
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void add_agg_path(T& path, unsigned start_index = 0)
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{
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double x=0;
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double y=0;
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path.rewind(start_index);
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for (unsigned cm = path.vertex(&x, &y); !agg::is_stop(cm); cm = path.vertex(&x, &y))
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{
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if (agg::is_move_to(cm))
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{
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move_to(x, y);
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}
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else if (agg::is_drawing(cm))
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{
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if (agg::is_curve3(cm))
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{
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double end_x=0;
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double end_y=0;
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std::cerr << "Curve 3 not implemented" << std::endl;
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path.vertex(&end_x, &end_y);
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curve_to(x,y,x,y,end_x,end_y);
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}
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else if (agg::is_curve4(cm))
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{
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double ct2_x=0;
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double ct2_y=0;
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double end_x=0;
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double end_y=0;
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path.vertex(&ct2_x, &ct2_y);
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path.vertex(&end_x, &end_y);
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curve_to(x,y,ct2_x,ct2_y,end_x,end_y);
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}
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else if (agg::is_line_to(cm))
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{
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line_to(x, y);
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}
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else
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{
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std::cerr << "Unimplemented drawing command: " << cm << std::endl;
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move_to(x, y);
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}
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}
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else if (agg::is_close(cm))
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{
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close_path();
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}
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else
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{
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std::cerr << "Unimplemented path command: " << cm << std::endl;
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}
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}
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}
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void rectangle(double x, double y, double w, double h)
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{
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context_->rectangle(x, y, w, h);
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}
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void stroke(void)
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{
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context_->stroke();
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}
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void fill(void)
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{
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context_->fill();
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}
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void paint(void)
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{
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context_->paint();
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}
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void set_pattern(cairo_pattern const& pattern)
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{
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context_->set_source(pattern.pattern());
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}
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void set_gradient(cairo_gradient const& pattern, const box2d<double> &bbox)
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{
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Cairo::RefPtr<Cairo::Gradient> p = pattern.gradient();
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double bx1=bbox.minx();
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double by1=bbox.miny();
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double bx2=bbox.maxx();
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double by2=bbox.maxy();
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if (pattern.units() != USER_SPACE_ON_USE)
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{
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if (pattern.units() == OBJECT_BOUNDING_BOX)
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{
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context_->get_path_extents (bx1, by1, bx2, by2);
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}
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Cairo::Matrix m = p->get_matrix();
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m.scale(1.0/(bx2-bx1),1.0/(by2-by1));
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m.translate(-bx1,-by1);
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p->set_matrix(m);
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}
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context_->set_source(p);
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}
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void add_image(double x, double y, image_data_32 & data, double opacity = 1.0)
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{
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cairo_pattern pattern(data);
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pattern.set_origin(x, y);
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context_->save();
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context_->set_source(pattern.pattern());
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context_->paint_with_alpha(opacity);
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context_->restore();
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}
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void set_font_face(cairo_face_manager & manager, face_ptr face)
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{
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context_->set_font_face(manager.get_face(face)->face());
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}
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void set_font_matrix(Cairo::Matrix const& matrix)
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{
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context_->set_font_matrix(matrix);
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}
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void set_matrix(Cairo::Matrix const& matrix)
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{
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context_->set_matrix(matrix);
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}
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void transform(Cairo::Matrix const& matrix)
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{
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context_->transform(matrix);
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}
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void translate(double x, double y)
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{
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context_->translate(x,y);
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}
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void save()
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{
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context_->save();
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}
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void restore()
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{
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context_->restore();
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}
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void show_glyph(unsigned long index, double x, double y)
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{
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Cairo::Glyph glyph;
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glyph.index = index;
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glyph.x = x;
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glyph.y = y;
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std::vector<Cairo::Glyph> glyphs;
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glyphs.push_back(glyph);
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context_->show_glyphs(glyphs);
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}
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|
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void glyph_path(unsigned long index, double x, double y)
|
|
{
|
|
Cairo::Glyph glyph;
|
|
|
|
glyph.index = index;
|
|
glyph.x = x;
|
|
glyph.y = y;
|
|
|
|
std::vector<Cairo::Glyph> glyphs;
|
|
|
|
glyphs.push_back(glyph);
|
|
|
|
context_->glyph_path(glyphs);
|
|
}
|
|
|
|
void add_text(text_path & path,
|
|
cairo_face_manager & manager,
|
|
face_manager<freetype_engine> &font_manager)
|
|
{
|
|
double sx = path.center.x;
|
|
double sy = path.center.y;
|
|
|
|
path.rewind();
|
|
|
|
for (int iii = 0; iii < path.num_nodes(); iii++)
|
|
{
|
|
char_info_ptr c;
|
|
double x, y, angle;
|
|
|
|
path.vertex(&c, &x, &y, &angle);
|
|
|
|
face_set_ptr faces = font_manager.get_face_set(c->format->face_name, c->format->fontset);
|
|
float text_size = c->format->text_size;
|
|
faces->set_character_sizes(text_size);
|
|
|
|
glyph_ptr glyph = faces->get_glyph(c->c);
|
|
|
|
if (glyph)
|
|
{
|
|
Cairo::Matrix matrix;
|
|
|
|
matrix.xx = text_size * cos(angle);
|
|
matrix.xy = text_size * sin(angle);
|
|
matrix.yx = text_size * -sin(angle);
|
|
matrix.yy = text_size * cos(angle);
|
|
matrix.x0 = 0;
|
|
matrix.y0 = 0;
|
|
|
|
set_font_matrix(matrix);
|
|
|
|
set_font_face(manager, glyph->get_face());
|
|
|
|
glyph_path(glyph->get_index(), sx + x, sy - y);
|
|
set_line_width(c->format->halo_radius);
|
|
set_line_join(ROUND_JOIN);
|
|
set_color(c->format->halo_fill);
|
|
stroke();
|
|
set_color(c->format->fill);
|
|
show_glyph(glyph->get_index(), sx + x, sy - y);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
private:
|
|
Cairo::RefPtr<Cairo::Context> context_;
|
|
};
|
|
|
|
cairo_renderer_base::cairo_renderer_base(Map const& m, Cairo::RefPtr<Cairo::Context> const& context, unsigned offset_x, unsigned offset_y)
|
|
: m_(m),
|
|
context_(context),
|
|
t_(m.width(),m.height(),m.get_current_extent(),offset_x,offset_y),
|
|
font_engine_(new freetype_engine()),
|
|
font_manager_(*font_engine_),
|
|
face_manager_(font_engine_,font_manager_),
|
|
detector_(box2d<double>(-m.buffer_size() ,-m.buffer_size() , m.width() + m.buffer_size() ,m.height() + m.buffer_size()))
|
|
{
|
|
#ifdef MAPNIK_DEBUG
|
|
std::clog << "scale=" << m.scale() << "\n";
|
|
#endif
|
|
}
|
|
|
|
template <>
|
|
cairo_renderer<Cairo::Context>::cairo_renderer(Map const& m, Cairo::RefPtr<Cairo::Context> const& context, unsigned offset_x, unsigned offset_y)
|
|
: feature_style_processor<cairo_renderer>(m),
|
|
cairo_renderer_base(m,context,offset_x,offset_y)
|
|
{
|
|
}
|
|
|
|
template <>
|
|
cairo_renderer<Cairo::Surface>::cairo_renderer(Map const& m, Cairo::RefPtr<Cairo::Surface> const& surface, unsigned offset_x, unsigned offset_y)
|
|
: feature_style_processor<cairo_renderer>(m),
|
|
cairo_renderer_base(m,Cairo::Context::create(surface),offset_x,offset_y)
|
|
{
|
|
}
|
|
|
|
cairo_renderer_base::~cairo_renderer_base() {}
|
|
|
|
#ifdef MAPNIK_DEBUG
|
|
void cairo_renderer_base::start_map_processing(Map const& map)
|
|
{
|
|
std::clog << "start map processing bbox="
|
|
<< map.get_current_extent() << "\n";
|
|
#else
|
|
void cairo_renderer_base::start_map_processing(Map const& /*map*/)
|
|
{
|
|
#endif
|
|
|
|
#if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 6, 0)
|
|
box2d<double> bounds = t_.forward(t_.extent());
|
|
context_->rectangle(bounds.minx(), bounds.miny(), bounds.maxx(), bounds.maxy());
|
|
context_->clip();
|
|
#endif
|
|
|
|
boost::optional<color> bg = m_.background();
|
|
if (bg)
|
|
{
|
|
cairo_context context(context_);
|
|
context.set_color(*bg);
|
|
context.paint();
|
|
}
|
|
}
|
|
|
|
template <>
|
|
void cairo_renderer<Cairo::Context>::end_map_processing(Map const& )
|
|
{
|
|
#ifdef MAPNIK_DEBUG
|
|
std::clog << "end map processing\n";
|
|
#endif
|
|
}
|
|
|
|
template <>
|
|
void cairo_renderer<Cairo::Surface>::end_map_processing(Map const& )
|
|
{
|
|
#ifdef MAPNIK_DEBUG
|
|
std::clog << "end map processing\n";
|
|
#endif
|
|
context_->show_page();
|
|
}
|
|
|
|
void cairo_renderer_base::start_layer_processing(layer const& lay)
|
|
{
|
|
#ifdef MAPNIK_DEBUG
|
|
std::clog << "start layer processing : " << lay.name() << "\n";
|
|
std::clog << "datasource = " << lay.datasource().get() << "\n";
|
|
#endif
|
|
if (lay.clear_label_cache())
|
|
{
|
|
detector_.clear();
|
|
}
|
|
}
|
|
|
|
void cairo_renderer_base::end_layer_processing(layer const&)
|
|
{
|
|
#ifdef MAPNIK_DEBUG
|
|
std::clog << "end layer processing\n";
|
|
#endif
|
|
}
|
|
|
|
void cairo_renderer_base::process(polygon_symbolizer const& sym,
|
|
mapnik::feature_ptr const& feature,
|
|
proj_transform const& prj_trans)
|
|
{
|
|
typedef coord_transform2<CoordTransform,geometry_type> path_type;
|
|
|
|
cairo_context context(context_);
|
|
|
|
context.set_color(sym.get_fill(), sym.get_opacity());
|
|
|
|
for (unsigned i = 0; i < feature->num_geometries(); ++i)
|
|
{
|
|
geometry_type const& geom = feature->get_geometry(i);
|
|
|
|
if (geom.num_points() > 2)
|
|
{
|
|
path_type path(t_, geom, prj_trans);
|
|
|
|
context.add_path(path);
|
|
context.fill();
|
|
}
|
|
}
|
|
}
|
|
|
|
void cairo_renderer_base::process(building_symbolizer const& sym,
|
|
mapnik::feature_ptr const& feature,
|
|
proj_transform const& prj_trans)
|
|
{
|
|
typedef coord_transform2<CoordTransform,geometry_type> path_type;
|
|
|
|
cairo_context context(context_);
|
|
|
|
color const& fill = sym.get_fill();
|
|
double height = 0.0;
|
|
expression_ptr height_expr = sym.height();
|
|
if (height_expr)
|
|
{
|
|
value_type result = boost::apply_visitor(evaluate<Feature,value_type>(*feature), *height_expr);
|
|
height = 0.7071 * result.to_double();
|
|
}
|
|
|
|
for (unsigned i = 0; i < feature->num_geometries(); ++i)
|
|
{
|
|
geometry_type const& geom = feature->get_geometry(i);
|
|
|
|
if (geom.num_points() > 2)
|
|
{
|
|
boost::scoped_ptr<geometry_type> frame(new geometry_type(LineString));
|
|
boost::scoped_ptr<geometry_type> roof(new geometry_type(Polygon));
|
|
std::deque<segment_t> face_segments;
|
|
double x0(0);
|
|
double y0(0);
|
|
|
|
geom.rewind(0);
|
|
unsigned cm = geom.vertex(&x0, &y0);
|
|
|
|
for (unsigned j = 1; j < geom.num_points(); ++j)
|
|
{
|
|
double x=0;
|
|
double y=0;
|
|
|
|
cm = geom.vertex(&x,&y);
|
|
|
|
if (cm == SEG_MOVETO)
|
|
{
|
|
frame->move_to(x,y);
|
|
}
|
|
else if (cm == SEG_LINETO)
|
|
{
|
|
frame->line_to(x,y);
|
|
}
|
|
|
|
if (j != 0)
|
|
{
|
|
face_segments.push_back(segment_t(x0, y0, x, y));
|
|
}
|
|
|
|
x0 = x;
|
|
y0 = y;
|
|
}
|
|
|
|
std::sort(face_segments.begin(), face_segments.end(), y_order);
|
|
std::deque<segment_t>::const_iterator itr = face_segments.begin();
|
|
for (; itr != face_segments.end(); ++itr)
|
|
{
|
|
boost::scoped_ptr<geometry_type> faces(new geometry_type(Polygon));
|
|
|
|
faces->move_to(itr->get<0>(), itr->get<1>());
|
|
faces->line_to(itr->get<2>(), itr->get<3>());
|
|
faces->line_to(itr->get<2>(), itr->get<3>() + height);
|
|
faces->line_to(itr->get<0>(), itr->get<1>() + height);
|
|
|
|
path_type faces_path(t_, *faces, prj_trans);
|
|
context.set_color(int(fill.red() * 0.8), int(fill.green() * 0.8),
|
|
int(fill.blue() * 0.8), fill.alpha() * sym.get_opacity() / 255.0);
|
|
context.add_path(faces_path);
|
|
context.fill();
|
|
|
|
frame->move_to(itr->get<0>(), itr->get<1>());
|
|
frame->line_to(itr->get<0>(), itr->get<1>() + height);
|
|
|
|
}
|
|
|
|
geom.rewind(0);
|
|
for (unsigned j = 0; j < geom.num_points(); ++j)
|
|
{
|
|
double x, y;
|
|
unsigned cm = geom.vertex(&x, &y);
|
|
|
|
if (cm == SEG_MOVETO)
|
|
{
|
|
frame->move_to(x, y + height);
|
|
roof->move_to(x, y + height);
|
|
}
|
|
else if (cm == SEG_LINETO)
|
|
{
|
|
frame->line_to(x, y + height);
|
|
roof->line_to(x, y + height);
|
|
}
|
|
}
|
|
|
|
path_type path(t_, *frame, prj_trans);
|
|
context.set_color(128, 128, 128, sym.get_opacity());
|
|
context.add_path(path);
|
|
context.stroke();
|
|
|
|
path_type roof_path(t_, *roof, prj_trans);
|
|
context.set_color(sym.get_fill(), sym.get_opacity());
|
|
context.add_path(roof_path);
|
|
context.fill();
|
|
}
|
|
}
|
|
}
|
|
|
|
void cairo_renderer_base::process(line_symbolizer const& sym,
|
|
mapnik::feature_ptr const& feature,
|
|
proj_transform const& prj_trans)
|
|
{
|
|
typedef coord_transform2<CoordTransform,geometry_type> path_type;
|
|
|
|
cairo_context context(context_);
|
|
mapnik::stroke const& stroke_ = sym.get_stroke();
|
|
|
|
context.set_color(stroke_.get_color(), stroke_.get_opacity());
|
|
|
|
for (unsigned i = 0; i < feature->num_geometries(); ++i)
|
|
{
|
|
geometry_type const& geom = feature->get_geometry(i);
|
|
|
|
if (geom.num_points() > 1)
|
|
{
|
|
cairo_context context(context_);
|
|
path_type path(t_, geom, prj_trans);
|
|
|
|
if (stroke_.has_dash())
|
|
{
|
|
context.set_dash(stroke_.get_dash_array());
|
|
}
|
|
|
|
context.set_line_join(stroke_.get_line_join());
|
|
context.set_line_cap(stroke_.get_line_cap());
|
|
context.set_miter_limit(4.0);
|
|
context.set_line_width(stroke_.get_width());
|
|
context.add_path(path);
|
|
context.stroke();
|
|
}
|
|
}
|
|
}
|
|
|
|
void cairo_renderer_base::render_marker(pixel_position const& pos, marker const& marker, const agg::trans_affine & tr, double opacity)
|
|
|
|
{
|
|
cairo_context context(context_);
|
|
if (marker.is_vector())
|
|
{
|
|
box2d<double> bbox;
|
|
bbox = (*marker.get_vector_data())->bounding_box();
|
|
|
|
coord<double,2> c = bbox.center();
|
|
// center the svg marker on '0,0'
|
|
agg::trans_affine mtx = agg::trans_affine_translation(-c.x,-c.y);
|
|
// apply symbol transformation to get to map space
|
|
mtx *= tr;
|
|
// render the marker at the center of the marker box
|
|
mtx.translate(pos.x+0.5 * marker.width(), pos.y+0.5 * marker.height());
|
|
|
|
typedef coord_transform2<CoordTransform,geometry_type> path_type;
|
|
mapnik::path_ptr vmarker = *marker.get_vector_data();
|
|
|
|
agg::pod_bvector<path_attributes> const & attributes_ = vmarker->attributes();
|
|
for(unsigned i = 0; i < attributes_.size(); ++i)
|
|
{
|
|
mapnik::svg::path_attributes const& attr = attributes_[i];
|
|
if (!attr.visibility_flag)
|
|
continue;
|
|
|
|
context.save();
|
|
|
|
agg::trans_affine transform = attr.transform;
|
|
transform *= mtx;
|
|
|
|
if (transform.is_valid() && !transform.is_identity())
|
|
{
|
|
double m[6];
|
|
transform.store_to(m);
|
|
context.transform(Cairo::Matrix(m[0],m[1],m[2],m[3],m[4],m[5]));
|
|
}
|
|
|
|
vertex_stl_adapter<svg_path_storage> stl_storage(vmarker->source());
|
|
svg_path_adapter svg_path(stl_storage);
|
|
|
|
if (attr.fill_flag || attr.fill_gradient.get_gradient_type() != NO_GRADIENT)
|
|
{
|
|
context.add_agg_path(svg_path,attr.index);
|
|
if (attr.even_odd_flag)
|
|
{
|
|
context.set_fill_rule(Cairo::FILL_RULE_EVEN_ODD);
|
|
}
|
|
else
|
|
{
|
|
context.set_fill_rule(Cairo::FILL_RULE_WINDING);
|
|
}
|
|
if(attr.fill_gradient.get_gradient_type() != NO_GRADIENT)
|
|
{
|
|
cairo_gradient g(attr.fill_gradient,attr.opacity*opacity);
|
|
|
|
context.set_gradient(g,bbox);
|
|
context.fill();
|
|
}
|
|
else if(attr.fill_flag)
|
|
{
|
|
context.set_color(attr.fill_color.r,attr.fill_color.g,attr.fill_color.b,attr.opacity*opacity);
|
|
context.fill();
|
|
}
|
|
}
|
|
|
|
|
|
if(attr.stroke_gradient.get_gradient_type() != NO_GRADIENT || attr.stroke_flag)
|
|
{
|
|
context.add_agg_path(svg_path,attr.index);
|
|
if(attr.stroke_gradient.get_gradient_type() != NO_GRADIENT)
|
|
{
|
|
context.set_line_width(attr.stroke_width);
|
|
context.set_line_cap(line_cap_enum(attr.line_cap));
|
|
context.set_line_join(line_join_enum(attr.line_join));
|
|
context.set_miter_limit(attr.miter_limit);
|
|
cairo_gradient g(attr.stroke_gradient,attr.opacity*opacity);
|
|
context.set_gradient(g,bbox);
|
|
context.stroke();
|
|
}
|
|
else if(attr.stroke_flag)
|
|
{
|
|
context.set_color(attr.stroke_color.r,attr.stroke_color.g,attr.stroke_color.b,attr.opacity*opacity);
|
|
context.set_line_width(attr.stroke_width);
|
|
context.set_line_cap(line_cap_enum(attr.line_cap));
|
|
context.set_line_join(line_join_enum(attr.line_join));
|
|
context.set_miter_limit(attr.miter_limit);
|
|
context.stroke();
|
|
}
|
|
}
|
|
|
|
context.restore();
|
|
}
|
|
}
|
|
else if (marker.is_bitmap())
|
|
{
|
|
context.add_image(pos.x, pos.y, **marker.get_bitmap_data(), opacity);
|
|
}
|
|
}
|
|
|
|
void cairo_renderer_base::process(point_symbolizer const& sym,
|
|
mapnik::feature_ptr const& feature,
|
|
proj_transform const& prj_trans)
|
|
{
|
|
std::string filename = path_processor_type::evaluate( *sym.get_filename(), *feature);
|
|
|
|
boost::optional<marker_ptr> marker;
|
|
if ( !filename.empty() )
|
|
{
|
|
marker = marker_cache::instance()->find(filename, true);
|
|
}
|
|
else
|
|
{
|
|
marker.reset(boost::make_shared<mapnik::marker>());
|
|
}
|
|
|
|
if (marker)
|
|
{
|
|
for (unsigned i = 0; i < feature->num_geometries(); ++i)
|
|
{
|
|
geometry_type const& geom = feature->get_geometry(i);
|
|
double x;
|
|
double y;
|
|
double z = 0;
|
|
|
|
if (sym.get_point_placement() == CENTROID_POINT_PLACEMENT)
|
|
geom.label_position(&x, &y);
|
|
else
|
|
geom.label_interior_position(&x, &y);
|
|
|
|
prj_trans.backward(x, y, z);
|
|
t_.forward(&x, &y);
|
|
|
|
int w = (*marker)->width();
|
|
int h = (*marker)->height();
|
|
|
|
int px = int(floor(x - 0.5 * w));
|
|
int py = int(floor(y - 0.5 * h));
|
|
box2d<double> label_ext (px, py, px + w, py + h);
|
|
if (sym.get_allow_overlap() ||
|
|
detector_.has_placement(label_ext))
|
|
{
|
|
agg::trans_affine mtx;
|
|
boost::array<double,6> const& m = sym.get_transform();
|
|
mtx.load_from(&m[0]);
|
|
|
|
render_marker(pixel_position(px,py),**marker, mtx, sym.get_opacity());
|
|
|
|
if (!sym.get_ignore_placement())
|
|
detector_.insert(label_ext);
|
|
metawriter_with_properties writer = sym.get_metawriter();
|
|
if (writer.first)
|
|
{
|
|
writer.first->add_box(label_ext, *feature, t_, writer.second);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void cairo_renderer_base::process(shield_symbolizer const& sym,
|
|
mapnik::feature_ptr const& feature,
|
|
proj_transform const& prj_trans)
|
|
{
|
|
shield_symbolizer_helper<face_manager<freetype_engine>,
|
|
label_collision_detector4> helper(
|
|
sym, *feature, prj_trans,
|
|
detector_.extent().width(), detector_.extent().height(),
|
|
1.0 /*scale_factor*/,
|
|
t_, font_manager_, detector_);
|
|
|
|
cairo_context context(context_);
|
|
|
|
while (helper.next()) {
|
|
placements_type &placements = helper.placements();
|
|
for (unsigned int ii = 0; ii < placements.size(); ++ii)
|
|
{
|
|
pixel_position marker_pos = helper.get_marker_position(placements[ii]);
|
|
render_marker(marker_pos,
|
|
helper.get_marker(), helper.get_transform(),
|
|
sym.get_opacity());
|
|
context.add_text(placements[ii], face_manager_, font_manager_);
|
|
}
|
|
}
|
|
}
|
|
|
|
void cairo_renderer_base::process(line_pattern_symbolizer const& sym,
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mapnik::feature_ptr const& feature,
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proj_transform const& prj_trans)
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{
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typedef coord_transform2<CoordTransform,geometry_type> path_type;
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std::string filename = path_processor_type::evaluate( *sym.get_filename(), *feature);
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boost::optional<mapnik::marker_ptr> marker = mapnik::marker_cache::instance()->find(filename,true);
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if (!marker && !(*marker)->is_bitmap()) return;
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unsigned width((*marker)->width());
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unsigned height((*marker)->height());
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cairo_context context(context_);
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cairo_pattern pattern(**((*marker)->get_bitmap_data()));
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pattern.set_extend(Cairo::EXTEND_REPEAT);
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pattern.set_filter(Cairo::FILTER_BILINEAR);
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context.set_line_width(height);
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for (unsigned i = 0; i < feature->num_geometries(); ++i)
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{
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geometry_type const& geom = feature->get_geometry(i);
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if (geom.num_points() > 1)
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{
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path_type path(t_, geom, prj_trans);
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double length(0);
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double x0(0), y0(0);
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double x, y;
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for (unsigned cm = path.vertex(&x, &y); cm != SEG_END; cm = path.vertex(&x, &y))
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{
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if (cm == SEG_MOVETO)
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{
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length = 0.0;
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}
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else if (cm == SEG_LINETO)
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{
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double dx = x - x0;
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double dy = y - y0;
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double angle = atan2(dy, dx);
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double offset = fmod(length, width);
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Cairo::Matrix matrix;
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cairo_matrix_init_identity(&matrix);
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cairo_matrix_translate(&matrix,x0,y0);
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cairo_matrix_rotate(&matrix,angle);
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cairo_matrix_translate(&matrix,-offset,0.5*height);
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cairo_matrix_invert(&matrix);
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pattern.set_matrix(matrix);
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context.set_pattern(pattern);
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context.move_to(x0, y0);
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context.line_to(x, y);
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context.stroke();
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length = length + hypot(x - x0, y - y0);
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}
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x0 = x;
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y0 = y;
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}
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}
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}
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}
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void cairo_renderer_base::process(polygon_pattern_symbolizer const& sym,
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mapnik::feature_ptr const& feature,
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proj_transform const& prj_trans)
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{
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typedef coord_transform2<CoordTransform,geometry_type> path_type;
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cairo_context context(context_);
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std::string filename = path_processor_type::evaluate( *sym.get_filename(), *feature);
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boost::optional<mapnik::marker_ptr> marker = mapnik::marker_cache::instance()->find(filename,true);
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if (!marker && !(*marker)->is_bitmap()) return;
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cairo_pattern pattern(**((*marker)->get_bitmap_data()));
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pattern.set_extend(Cairo::EXTEND_REPEAT);
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context.set_pattern(pattern);
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for (unsigned i = 0; i < feature->num_geometries(); ++i)
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{
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geometry_type const& geom = feature->get_geometry(i);
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if (geom.num_points() > 2)
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{
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path_type path(t_, geom, prj_trans);
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context.add_path(path);
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context.fill();
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}
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}
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}
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void cairo_renderer_base::process(raster_symbolizer const& sym,
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mapnik::feature_ptr const& feature,
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proj_transform const& prj_trans)
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{
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raster_ptr const& source = feature->get_raster();
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if (source)
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{
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// If there's a colorizer defined, use it to color the raster in-place
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raster_colorizer_ptr colorizer = sym.get_colorizer();
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if (colorizer)
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colorizer->colorize(source,*feature);
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box2d<double> target_ext = box2d<double>(source->ext_);
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prj_trans.backward(target_ext, PROJ_ENVELOPE_POINTS);
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box2d<double> ext=t_.forward(target_ext);
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int start_x = (int)ext.minx();
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int start_y = (int)ext.miny();
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int end_x = (int)ceil(ext.maxx());
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int end_y = (int)ceil(ext.maxy());
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int raster_width = end_x - start_x;
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int raster_height = end_y - start_y;
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double err_offs_x = ext.minx() - start_x;
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double err_offs_y = ext.miny() - start_y;
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if (raster_width > 0 && raster_height > 0)
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{
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double scale_factor = ext.width() / source->data_.width();
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image_data_32 target_data(raster_width,raster_height);
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raster target(target_ext, target_data);
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reproject_raster(target, *source, prj_trans, err_offs_x, err_offs_y,
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sym.get_mesh_size(),
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sym.calculate_filter_factor(),
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scale_factor,
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sym.get_scaling());
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cairo_context context(context_);
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//TODO -- support for advanced image merging
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context.add_image(start_x, start_y, target.data_, sym.get_opacity());
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}
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}
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}
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// TODO - this is woefully behind the AGG version.
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void cairo_renderer_base::process(markers_symbolizer const& sym,
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mapnik::feature_ptr const& feature,
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proj_transform const& prj_trans)
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{
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typedef coord_transform2<CoordTransform,geometry_type> path_type;
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arrow arrow_;
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cairo_context context(context_);
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color const& fill_ = sym.get_fill();
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context.set_color(fill_.red(), fill_.green(), fill_.blue(), fill_.alpha());
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for (unsigned i = 0; i < feature->num_geometries(); ++i)
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{
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geometry_type const& geom = feature->get_geometry(i);
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if (geom.num_points() > 1)
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{
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path_type path(t_, geom, prj_trans);
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markers_placement<path_type, label_collision_detector4> placement(path, arrow_.extent(), detector_, sym.get_spacing(), sym.get_max_error(), sym.get_allow_overlap());
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double x, y, angle;
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while (placement.get_point(&x, &y, &angle)) {
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Cairo::Matrix matrix = Cairo::rotation_matrix(angle) * Cairo::translation_matrix(x,y) ;
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context.set_matrix(matrix);
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context.add_path(arrow_);
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}
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}
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context.fill();
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}
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}
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void cairo_renderer_base::process(text_symbolizer const& sym,
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mapnik::feature_ptr const& feature,
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proj_transform const& prj_trans)
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{
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text_symbolizer_helper<face_manager<freetype_engine>, label_collision_detector4> helper(sym, *feature, prj_trans, detector_.extent().width(), detector_.extent().height(), 1.0 /*scale_factor*/, t_, font_manager_, detector_);
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cairo_context context(context_);
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while (helper.next()) {
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placements_type &placements = helper.placements();
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for (unsigned int ii = 0; ii < placements.size(); ++ii)
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{
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context.add_text(placements[ii], face_manager_, font_manager_);
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}
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}
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}
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template class cairo_renderer<Cairo::Surface>;
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template class cairo_renderer<Cairo::Context>;
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}
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#endif
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