/
agg_renderer.cpp
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/
agg_renderer.cpp
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/*****************************************************************************
*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2011 Artem Pavlenko
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*****************************************************************************/
//$Id$
// mapnik
#include <mapnik/agg_renderer.hpp>
#include <mapnik/agg_rasterizer.hpp>
#include <mapnik/marker_cache.hpp>
#include <mapnik/unicode.hpp>
#include <mapnik/placement_finder.hpp>
#include <mapnik/config_error.hpp>
#include <mapnik/font_set.hpp>
#include <mapnik/parse_path.hpp>
#include <mapnik/text_path.hpp>
#include <mapnik/svg/svg_converter.hpp>
#include <mapnik/svg/svg_renderer.hpp>
#include <mapnik/svg/svg_path_adapter.hpp>
// agg
#define AGG_RENDERING_BUFFER row_ptr_cache<int8u>
#include "agg_rendering_buffer.h"
#include "agg_pixfmt_rgba.h"
#include "agg_rasterizer_scanline_aa.h"
#include "agg_basics.h"
#include "agg_scanline_p.h"
#include "agg_scanline_u.h"
#include "agg_renderer_scanline.h"
#include "agg_path_storage.h"
#include "agg_span_allocator.h"
#include "agg_span_pattern_rgba.h"
#include "agg_image_accessors.h"
#include "agg_conv_stroke.h"
#include "agg_conv_dash.h"
#include "agg_conv_contour.h"
#include "agg_conv_clip_polyline.h"
#include "agg_vcgen_stroke.h"
#include "agg_conv_adaptor_vcgen.h"
#include "agg_conv_smooth_poly1.h"
#include "agg_conv_marker.h"
#include "agg_vcgen_markers_term.h"
#include "agg_renderer_outline_aa.h"
#include "agg_rasterizer_outline_aa.h"
#include "agg_rasterizer_outline.h"
#include "agg_renderer_outline_image.h"
#include "agg_span_allocator.h"
#include "agg_span_pattern_rgba.h"
#include "agg_renderer_scanline.h"
#include "agg_pattern_filters_rgba.h"
#include "agg_renderer_outline_image.h"
#include "agg_vpgen_clip_polyline.h"
#include "agg_arrowhead.h"
// boost
#include <boost/utility.hpp>
#include <boost/make_shared.hpp>
// stl
#ifdef MAPNIK_DEBUG
#include <iostream>
#endif
#include <cmath>
namespace mapnik
{
class pattern_source : private boost::noncopyable
{
public:
pattern_source(image_data_32 const& pattern)
: pattern_(pattern) {}
unsigned int width() const
{
return pattern_.width();
}
unsigned int height() const
{
return pattern_.height();
}
agg::rgba8 pixel(int x, int y) const
{
unsigned c = pattern_(x,y);
return agg::rgba8(c & 0xff,
(c >> 8) & 0xff,
(c >> 16) & 0xff,
(c >> 24) & 0xff);
}
private:
image_data_32 const& pattern_;
};
template <typename T>
agg_renderer<T>::agg_renderer(Map const& m, T & pixmap, double scale_factor, unsigned offset_x, unsigned offset_y)
: feature_style_processor<agg_renderer>(m, scale_factor),
pixmap_(pixmap),
width_(pixmap_.width()),
height_(pixmap_.height()),
scale_factor_(scale_factor),
t_(m.width(),m.height(),m.get_current_extent(),offset_x,offset_y),
font_engine_(),
font_manager_(font_engine_),
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()))),
ras_ptr(new rasterizer)
{
setup(m);
}
template <typename T>
agg_renderer<T>::agg_renderer(Map const& m, T & pixmap, boost::shared_ptr<label_collision_detector4> detector,
double scale_factor, unsigned offset_x, unsigned offset_y)
: feature_style_processor<agg_renderer>(m, scale_factor),
pixmap_(pixmap),
width_(pixmap_.width()),
height_(pixmap_.height()),
scale_factor_(scale_factor),
t_(m.width(),m.height(),m.get_current_extent(),offset_x,offset_y),
font_engine_(),
font_manager_(font_engine_),
detector_(detector),
ras_ptr(new rasterizer)
{
setup(m);
}
template <typename T>
void agg_renderer<T>::setup(Map const &m)
{
boost::optional<color> const& bg = m.background();
if (bg) pixmap_.set_background(*bg);
boost::optional<std::string> const& image_filename = m.background_image();
if (image_filename)
{
boost::optional<mapnik::marker_ptr> bg_marker = mapnik::marker_cache::instance()->find(*image_filename,true);
if (bg_marker && (*bg_marker)->is_bitmap())
{
mapnik::image_ptr bg_image = *(*bg_marker)->get_bitmap_data();
int w = bg_image->width();
int h = bg_image->height();
if ( w > 0 && h > 0)
{
// repeat background-image both vertically and horizontally
unsigned x_steps = unsigned(std::ceil(width_/double(w)));
unsigned y_steps = unsigned(std::ceil(height_/double(h)));
for (unsigned x=0;x<x_steps;++x)
{
for (unsigned y=0;y<y_steps;++y)
{
pixmap_.set_rectangle_alpha2(*bg_image, x*w, y*h, 1.0f);
}
}
}
}
}
#ifdef MAPNIK_DEBUG
std::clog << "scale=" << m.scale() << "\n";
#endif
}
template <typename T>
agg_renderer<T>::~agg_renderer() {}
template <typename T>
#ifdef MAPNIK_DEBUG
void agg_renderer<T>::start_map_processing(Map const& map)
{
std::clog << "start map processing bbox="
<< map.get_current_extent() << "\n";
#else
void agg_renderer<T>::start_map_processing(Map const& /*map*/)
{
#endif
ras_ptr->clip_box(0,0,width_,height_);
}
template <typename T>
void agg_renderer<T>::end_map_processing(Map const& )
{
#ifdef MAPNIK_DEBUG
std::clog << "end map processing\n";
#endif
}
template <typename T>
void agg_renderer<T>::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();
}
}
template <typename T>
void agg_renderer<T>::end_layer_processing(layer const&)
{
#ifdef MAPNIK_DEBUG
std::clog << "end layer processing\n";
#endif
}
template <typename T>
void agg_renderer<T>::render_marker(const int x, const int y, marker &marker, const agg::trans_affine & tr, double opacity)
{
if (marker.is_vector())
{
typedef agg::pixfmt_rgba32_plain pixfmt;
typedef agg::renderer_base<pixfmt> renderer_base;
typedef agg::renderer_scanline_aa_solid<renderer_base> renderer_solid;
ras_ptr->reset();
ras_ptr->gamma(agg::gamma_linear());
agg::scanline_u8 sl;
agg::rendering_buffer buf(pixmap_.raw_data(), width_, height_, width_ * 4);
pixfmt pixf(buf);
renderer_base renb(pixf);
box2d<double> const& 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;
mtx *= agg::trans_affine_scaling(scale_factor_);
// render the marker at the center of the marker box
mtx.translate(x+0.5 * marker.width(), y+0.5 * marker.height());
vertex_stl_adapter<svg_path_storage> stl_storage((*marker.get_vector_data())->source());
svg_path_adapter svg_path(stl_storage);
svg_renderer<svg_path_adapter,
agg::pod_bvector<path_attributes>,
renderer_solid,
agg::pixfmt_rgba32_plain> svg_renderer(svg_path,
(*marker.get_vector_data())->attributes());
svg_renderer.render(*ras_ptr, sl, renb, mtx, opacity, bbox);
}
else
{
pixmap_.set_rectangle_alpha2(**marker.get_bitmap_data(), x, y, opacity);
}
}
template class agg_renderer<image_32>;
}