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96 lines
4.0 KiB
C++
96 lines
4.0 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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#include <mapnik/renderer_common/process_polygon_symbolizer.hpp>
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#include <mapnik/renderer_common/clipping_extent.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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using vertex_converter_type = vertex_converter<rasterizer,clip_poly_tag,transform_tag,affine_transform_tag,simplify_tag,smooth_tag>;
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ras_ptr->reset();
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double gamma = get<value_double>(sym, keys::gamma, feature, common_.vars_, 1.0);
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gamma_method_enum gamma_method = get<gamma_method_enum>(sym, keys::gamma_method, feature, common_.vars_, 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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box2d<double> clip_box = clipping_extent(common_);
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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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render_polygon_symbolizer<vertex_converter_type>(
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sym, feature, prj_trans, common_, clip_box, *ras_ptr,
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[&](color const &fill, double opacity) {
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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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using color_type = agg::rgba8;
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using order_type = agg::order_rgba;
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using blender_type = agg::comp_op_adaptor_rgba_pre<color_type, order_type>; // comp blender
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using pixfmt_comp_type = agg::pixfmt_custom_blend_rgba<blender_type, agg::rendering_buffer>;
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using renderer_base = agg::renderer_base<pixfmt_comp_type>;
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using renderer_type = agg::renderer_scanline_aa_solid<renderer_base>;
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pixfmt_comp_type pixf(buf);
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pixf.comp_op(static_cast<agg::comp_op_e>(get<composite_mode_e>(sym, keys::comp_op, feature, common_.vars_, 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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}
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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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