118 lines
4.7 KiB
C++
118 lines
4.7 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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// boost
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// mapnik
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#include <mapnik/feature.hpp>
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#include <mapnik/agg_renderer.hpp>
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#include <mapnik/graphics.hpp>
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#include <mapnik/agg_helpers.hpp>
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#include <mapnik/agg_rasterizer.hpp>
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#include <mapnik/symbolizer.hpp>
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#include <mapnik/vertex_converters.hpp>
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// agg
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#include "agg_basics.h"
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#include "agg_rendering_buffer.h"
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#include "agg_pixfmt_rgba.h"
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#include "agg_color_rgba.h"
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#include "agg_renderer_scanline.h"
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#include "agg_rasterizer_scanline_aa.h"
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#include "agg_scanline_u.h"
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namespace mapnik {
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template <typename T0, typename T1>
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void agg_renderer<T0,T1>::process(polygon_symbolizer const& sym,
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mapnik::feature_impl & feature,
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proj_transform const& prj_trans)
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{
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ras_ptr->reset();
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double gamma = get<value_double>(sym, keys::gamma, feature, 1.0);
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gamma_method_enum gamma_method = get<gamma_method_enum>(sym, keys::gamma_method, feature, GAMMA_POWER);
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if (gamma != gamma_ || gamma_method != gamma_method_)
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{
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set_gamma_method(ras_ptr, gamma, gamma_method);
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gamma_method_ = gamma_method;
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gamma_ = gamma;
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}
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agg::trans_affine tr;
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auto transform = get_optional<transform_type>(sym, keys::geometry_transform);
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if (transform) evaluate_transform(tr, feature, *transform);
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box2d<double> clip_box = clipping_extent();
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typedef boost::mpl::vector<clip_poly_tag,transform_tag,affine_transform_tag,simplify_tag,smooth_tag> conv_types;
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vertex_converter<box2d<double>, rasterizer, polygon_symbolizer,
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CoordTransform, proj_transform, agg::trans_affine, conv_types>
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converter(clip_box,*ras_ptr,sym,t_,prj_trans,tr,scale_factor_);
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bool clip = get<value_bool>(sym, keys::clip, feature, true);
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double simplify_tolerance = get<double>(sym, keys::simplify_tolerance, feature, 0.0);
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double smooth = get<value_double>(sym, keys::smooth, feature, 0.0);
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double opacity = get<value_double>(sym,keys::fill_opacity,feature, 1.0);
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if (prj_trans.equal() && clip) converter.set<clip_poly_tag>(); //optional clip (default: true)
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converter.set<transform_tag>(); //always transform
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converter.set<affine_transform_tag>();
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if (simplify_tolerance > 0.0) converter.set<simplify_tag>(); // optional simplify converter
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if (smooth > 0.0) converter.set<smooth_tag>(); // optional smooth converter
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for (geometry_type & geom : feature.paths())
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{
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if (geom.size() > 2)
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{
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converter.apply(geom);
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}
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}
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agg::rendering_buffer buf(current_buffer_->raw_data(),current_buffer_->width(),current_buffer_->height(), current_buffer_->width() * 4);
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color const& fill = get<mapnik::color>(sym, keys::fill, feature, mapnik::color(128,128,128)); // gray
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unsigned r=fill.red();
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unsigned g=fill.green();
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unsigned b=fill.blue();
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unsigned a=fill.alpha();
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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::comp_op_adaptor_rgba_pre<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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pixfmt_comp_type pixf(buf);
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pixf.comp_op(get<agg::comp_op_e>(sym, keys::comp_op, feature, agg::comp_op_src_over));
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renderer_base renb(pixf);
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renderer_type ren(renb);
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ren.color(agg::rgba8_pre(r, g, b, int(a * opacity)));
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agg::scanline_u8 sl;
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ras_ptr->filling_rule(agg::fill_even_odd);
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agg::render_scanlines(*ras_ptr, sl, ren);
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}
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template void agg_renderer<image_32>::process(polygon_symbolizer const&,
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mapnik::feature_impl &,
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proj_transform const&);
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}
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