mapnik/src/agg/process_line_pattern_symbolizer.cpp
Artem Pavlenko aad7c5e384 + implement compositing for text
+ refactor image_32
2012-05-09 12:39:23 +01:00

119 lines
4.4 KiB
C++

/*****************************************************************************
*
* 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
*
*****************************************************************************/
// boost
#include <boost/foreach.hpp>
// mapnik
#include <mapnik/debug.hpp>
#include <mapnik/graphics.hpp>
#include <mapnik/agg_renderer.hpp>
#include <mapnik/agg_rasterizer.hpp>
#include <mapnik/agg_pattern_source.hpp>
#include <mapnik/expression_evaluator.hpp>
#include <mapnik/marker.hpp>
#include <mapnik/marker_cache.hpp>
#include <mapnik/line_pattern_symbolizer.hpp>
#include <mapnik/vertex_converters.hpp>
// agg
#include "agg_basics.h"
#include "agg_rendering_buffer.h"
#include "agg_pixfmt_rgba.h"
#include "agg_rasterizer_outline.h"
#include "agg_rasterizer_outline_aa.h"
#include "agg_scanline_u.h"
#include "agg_renderer_scanline.h"
#include "agg_pattern_filters_rgba.h"
#include "agg_span_allocator.h"
#include "agg_span_pattern_rgba.h"
#include "agg_renderer_outline_image.h"
#include "agg_conv_clip_polyline.h"
namespace mapnik {
template <typename T>
void agg_renderer<T>::process(line_pattern_symbolizer const& sym,
mapnik::feature_ptr const& feature,
proj_transform const& prj_trans)
{
typedef agg::rgba8 color;
typedef agg::order_rgba order;
typedef agg::pixel32_type pixel_type;
typedef agg::comp_op_adaptor_rgba<color, order> blender_type;
typedef agg::pattern_filter_bilinear_rgba8 filter_type;
typedef agg::line_image_pattern<filter_type> pattern_type;
typedef agg::pixfmt_custom_blend_rgba<blender_type, agg::rendering_buffer> pixfmt_type;
typedef agg::renderer_base<pixfmt_type> renderer_base;
typedef agg::renderer_outline_image<renderer_base, pattern_type> renderer_type;
typedef agg::rasterizer_outline_aa<renderer_type> rasterizer_type;
std::string filename = path_processor_type::evaluate( *sym.get_filename(), *feature);
boost::optional<marker_ptr> mark = marker_cache::instance()->find(filename,true);
if (!mark) return;
if (!(*mark)->is_bitmap())
{
MAPNIK_LOG_DEBUG(agg_renderer) << "agg_renderer: Only images (not '" << filename << "') are supported in the line_pattern_symbolizer";
return;
}
boost::optional<image_ptr> pat = (*mark)->get_bitmap_data();
if (!pat) return;
box2d<double> ext = query_extent_ * 1.0;
agg::rendering_buffer buf(pixmap_.raw_data(),width_,height_, width_ * 4);
pixfmt_type pixf(buf);
if (sym.comp_op()) pixf.comp_op(static_cast<agg::comp_op_e>(*sym.comp_op()));
renderer_base ren_base(pixf);
agg::pattern_filter_bilinear_rgba8 filter;
pattern_source source(*(*pat));
pattern_type pattern (filter,source);
renderer_type ren(ren_base, pattern);
rasterizer_type ras(ren);
typedef boost::mpl::vector<clip_line_tag,transform_tag,smooth_tag> conv_types;
vertex_converter<box2d<double>,rasterizer_type,line_pattern_symbolizer, proj_transform, CoordTransform, conv_types>
converter(ext,ras,sym,t_,prj_trans,scale_factor_);
if (sym.clip()) converter.set<clip_line_tag>(); //optional clip (default: true)
converter.set<transform_tag>(); //always transform
if (sym.smooth() > 0.0) converter.set<smooth_tag>(); // optional smooth converter
BOOST_FOREACH(geometry_type & geom, feature->paths())
{
if (geom.num_points() > 1)
{
converter.apply(geom);
}
}
}
template void agg_renderer<image_32>::process(line_pattern_symbolizer const&,
mapnik::feature_ptr const&,
proj_transform const&);
}