418 lines
19 KiB
C++
418 lines
19 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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// mapnik
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#include <mapnik/debug.hpp>
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#include <mapnik/graphics.hpp>
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#include <mapnik/geom_util.hpp>
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#include <mapnik/agg_renderer.hpp>
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#include <mapnik/agg_rasterizer.hpp>
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#include <mapnik/expression_evaluator.hpp>
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#include <mapnik/vertex_converters.hpp>
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#include <mapnik/marker.hpp>
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#include <mapnik/marker_cache.hpp>
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#include <mapnik/marker_helpers.hpp>
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#include <mapnik/svg/svg_renderer.hpp>
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#include <mapnik/svg/svg_storage.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/markers_placement.hpp>
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#include <mapnik/markers_symbolizer.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_rasterizer_scanline_aa.h"
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#include "agg_scanline_u.h"
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#include "agg_path_storage.h"
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#include "agg_conv_clip_polyline.h"
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#include "agg_conv_transform.h"
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#include "agg_image_filters.h"
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#include "agg_trans_bilinear.h"
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#include "agg_span_allocator.h"
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#include "agg_image_accessors.h"
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#include "agg_span_image_filter_rgba.h"
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// boost
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#include <boost/optional.hpp>
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namespace mapnik {
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template <typename BufferType, typename SvgRenderer, typename Rasterizer, typename Detector>
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struct vector_markers_rasterizer_dispatch
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{
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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::pixel32_type pixel_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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vector_markers_rasterizer_dispatch(BufferType & image_buffer,
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SvgRenderer & svg_renderer,
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Rasterizer & ras,
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box2d<double> const& bbox,
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agg::trans_affine const& marker_trans,
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markers_symbolizer const& sym,
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Detector & detector,
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double scale_factor)
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: buf_(image_buffer.raw_data(), image_buffer.width(), image_buffer.height(), image_buffer.width() * 4),
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pixf_(buf_),
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renb_(pixf_),
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svg_renderer_(svg_renderer),
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ras_(ras),
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bbox_(bbox),
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marker_trans_(marker_trans),
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sym_(sym),
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detector_(detector),
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scale_factor_(scale_factor)
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{
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pixf_.comp_op(static_cast<agg::comp_op_e>(sym_.comp_op()));
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}
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template <typename T>
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void add_path(T & path)
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{
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marker_placement_e placement_method = sym_.get_marker_placement();
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if (placement_method == MARKER_POINT_PLACEMENT)
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{
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double x,y;
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path.rewind(0);
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label::interior_position(path, x, y);
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agg::trans_affine matrix = marker_trans_;
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matrix.translate(x,y);
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box2d<double> transformed_bbox = bbox_ * matrix;
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if (sym_.get_allow_overlap() ||
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detector_.has_placement(transformed_bbox))
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{
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svg_renderer_.render(ras_, sl_, renb_, matrix, 1, bbox_);
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if (!sym_.get_ignore_placement())
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detector_.insert(transformed_bbox);
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}
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}
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else
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{
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markers_placement<T, label_collision_detector4> placement(path, bbox_, marker_trans_, detector_,
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sym_.get_spacing() * scale_factor_,
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sym_.get_max_error(),
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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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{
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agg::trans_affine matrix = marker_trans_;
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matrix.rotate(angle);
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matrix.translate(x, y);
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svg_renderer_.render(ras_, sl_, renb_, matrix, 1, bbox_);
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}
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}
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}
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private:
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agg::scanline_u8 sl_;
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agg::rendering_buffer buf_;
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pixfmt_comp_type pixf_;
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renderer_base renb_;
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SvgRenderer & svg_renderer_;
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Rasterizer & ras_;
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box2d<double> const& bbox_;
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agg::trans_affine const& marker_trans_;
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markers_symbolizer const& sym_;
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Detector & detector_;
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double scale_factor_;
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};
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template <typename Rasterizer, typename RendererBuffer>
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void render_raster_marker(Rasterizer & ras, RendererBuffer & renb,
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agg::scanline_u8 & sl, image_data_32 const& src,
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agg::trans_affine const& marker_tr, double opacity)
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{
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double width = src.width();
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double height = src.height();
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double p[8];
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p[0] = 0; p[1] = 0;
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p[2] = width; p[3] = 0;
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p[4] = width; p[5] = height;
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p[6] = 0; p[7] = height;
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marker_tr.transform(&p[0], &p[1]);
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marker_tr.transform(&p[2], &p[3]);
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marker_tr.transform(&p[4], &p[5]);
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marker_tr.transform(&p[6], &p[7]);
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ras.move_to_d(p[0],p[1]);
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ras.line_to_d(p[2],p[3]);
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ras.line_to_d(p[4],p[5]);
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ras.line_to_d(p[6],p[7]);
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typedef agg::rgba8 color_type;
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agg::span_allocator<color_type> sa;
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agg::image_filter_bilinear filter_kernel;
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agg::image_filter_lut filter(filter_kernel, false);
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agg::rendering_buffer marker_buf((unsigned char *)src.getBytes(),
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src.width(),
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src.height(),
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src.width()*4);
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agg::pixfmt_rgba32_pre pixf(marker_buf);
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typedef agg::image_accessor_clone<agg::pixfmt_rgba32_pre> img_accessor_type;
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typedef agg::span_interpolator_linear<agg::trans_affine> interpolator_type;
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typedef agg::span_image_filter_rgba_2x2<img_accessor_type,
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interpolator_type> span_gen_type;
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typedef agg::order_rgba order_type;
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typedef agg::pixel32_type pixel_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_alpha<renderer_base,
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agg::span_allocator<agg::rgba8>,
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span_gen_type> renderer_type;
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img_accessor_type ia(pixf);
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interpolator_type interpolator(agg::trans_affine(p, 0, 0, width, height) );
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span_gen_type sg(ia, interpolator, filter);
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renderer_type rp(renb,sa, sg, unsigned(opacity*255));
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agg::render_scanlines(ras, sl, rp);
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}
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template <typename BufferType, typename Rasterizer, typename Detector>
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struct raster_markers_rasterizer_dispatch
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{
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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::pixel32_type pixel_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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raster_markers_rasterizer_dispatch(BufferType & image_buffer,
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Rasterizer & ras,
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image_data_32 const& src,
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agg::trans_affine const& marker_trans,
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markers_symbolizer const& sym,
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Detector & detector,
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double scale_factor)
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: buf_(image_buffer.raw_data(), image_buffer.width(), image_buffer.height(), image_buffer.width() * 4),
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pixf_(buf_),
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renb_(pixf_),
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ras_(ras),
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src_(src),
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marker_trans_(marker_trans),
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sym_(sym),
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detector_(detector),
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scale_factor_(scale_factor)
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{
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pixf_.comp_op(static_cast<agg::comp_op_e>(sym_.comp_op()));
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}
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template <typename T>
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void add_path(T & path)
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{
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marker_placement_e placement_method = sym_.get_marker_placement();
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box2d<double> bbox_(0,0, src_.width(),src_.height());
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if (placement_method == MARKER_POINT_PLACEMENT)
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{
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double x,y;
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path.rewind(0);
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label::interior_position(path, x, y);
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agg::trans_affine matrix = marker_trans_;
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matrix.translate(x,y);
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box2d<double> transformed_bbox = bbox_ * matrix;
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if (sym_.get_allow_overlap() ||
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detector_.has_placement(transformed_bbox))
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{
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float opacity = sym_.get_opacity() ? *sym_.get_opacity() : 1;
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render_raster_marker(ras_, renb_, sl_, src_,
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matrix, opacity);
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if (!sym_.get_ignore_placement())
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detector_.insert(transformed_bbox);
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}
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}
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else
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{
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markers_placement<T, label_collision_detector4> placement(path, bbox_, marker_trans_, detector_,
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sym_.get_spacing() * scale_factor_,
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sym_.get_max_error(),
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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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{
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agg::trans_affine matrix = marker_trans_;
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matrix.rotate(angle);
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matrix.translate(x,y);
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float opacity = sym_.get_opacity() ? *sym_.get_opacity() : 1;
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render_raster_marker(ras_, renb_, sl_, src_,
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matrix, opacity);
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}
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}
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}
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private:
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agg::scanline_u8 sl_;
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agg::rendering_buffer buf_;
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pixfmt_comp_type pixf_;
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renderer_base renb_;
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Rasterizer & ras_;
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image_data_32 const& src_;
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agg::trans_affine const& marker_trans_;
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markers_symbolizer const& sym_;
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Detector & detector_;
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double scale_factor_;
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};
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template <typename T>
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void agg_renderer<T>::process(markers_symbolizer const& sym,
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feature_impl & feature,
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proj_transform const& prj_trans)
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{
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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::pixel32_type pixel_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 label_collision_detector4 detector_type;
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typedef boost::mpl::vector<clip_line_tag,transform_tag,smooth_tag> conv_types;
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std::string filename = path_processor_type::evaluate(*sym.get_filename(), feature);
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if (!filename.empty())
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{
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boost::optional<marker_ptr> mark = mapnik::marker_cache::instance()->find(filename, true);
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if (mark && *mark)
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{
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ras_ptr->reset();
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ras_ptr->gamma(agg::gamma_power());
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agg::trans_affine geom_tr;
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evaluate_transform(geom_tr, feature, sym.get_transform());
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agg::trans_affine tr;
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tr *= agg::trans_affine_scaling(scale_factor_);
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if ((*mark)->is_vector())
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{
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using namespace mapnik::svg;
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typedef agg::renderer_scanline_aa_solid<renderer_base> renderer_type;
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typedef agg::pod_bvector<path_attributes> svg_attribute_type;
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typedef svg_renderer<svg_path_adapter,
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svg_attribute_type,
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renderer_type,
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agg::pixfmt_rgba32 > svg_renderer_type;
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typedef vector_markers_rasterizer_dispatch<buffer_type,
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svg_renderer_type,
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rasterizer,
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detector_type > dispatch_type;
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boost::optional<svg_path_ptr> const& stock_vector_marker = (*mark)->get_vector_data();
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expression_ptr const& width_expr = sym.get_width();
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expression_ptr const& height_expr = sym.get_height();
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// special case for simple ellipse markers
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// to allow for full control over rx/ry dimensions
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if (filename == "shape://ellipse"
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&& (width_expr || height_expr))
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{
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svg_storage_type marker_ellipse;
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vertex_stl_adapter<svg_path_storage> stl_storage(marker_ellipse.source());
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svg_path_adapter svg_path(stl_storage);
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build_ellipse(sym, feature, marker_ellipse, svg_path);
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svg_attribute_type attributes;
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bool result = push_explicit_style( (*stock_vector_marker)->attributes(), attributes, sym);
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svg_renderer_type svg_renderer(svg_path, result ? attributes : (*stock_vector_marker)->attributes());
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evaluate_transform(tr, feature, sym.get_image_transform());
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box2d<double> bbox = marker_ellipse.bounding_box();
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coord2d center = bbox.center();
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agg::trans_affine_translation recenter(-center.x, -center.y);
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agg::trans_affine marker_trans = recenter * tr;
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dispatch_type rasterizer_dispatch(*current_buffer_,svg_renderer,*ras_ptr,
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bbox, marker_trans, sym, *detector_, scale_factor_);
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vertex_converter<box2d<double>, dispatch_type, markers_symbolizer,
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CoordTransform, proj_transform, agg::trans_affine, conv_types>
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converter(query_extent_* 1.1,rasterizer_dispatch, sym,t_,prj_trans,tr,scale_factor_);
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if (sym.clip()) converter.template set<clip_line_tag>(); //optional clip (default: true)
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converter.template set<transform_tag>(); //always transform
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if (sym.smooth() > 0.0) converter.template set<smooth_tag>(); // optional smooth converter
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BOOST_FOREACH(geometry_type & geom, feature.paths())
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{
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converter.apply(geom);
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}
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}
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else
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{
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box2d<double> const& bbox = (*mark)->bounding_box();
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setup_label_transform(tr, bbox, feature, sym);
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coord2d center = bbox.center();
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agg::trans_affine_translation recenter(-center.x, -center.y);
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agg::trans_affine marker_trans = recenter * tr;
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vertex_stl_adapter<svg_path_storage> stl_storage((*stock_vector_marker)->source());
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svg_path_adapter svg_path(stl_storage);
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svg_attribute_type attributes;
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bool result = push_explicit_style( (*stock_vector_marker)->attributes(), attributes, sym);
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svg_renderer_type svg_renderer(svg_path, result ? attributes : (*stock_vector_marker)->attributes());
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dispatch_type rasterizer_dispatch(*current_buffer_,svg_renderer,*ras_ptr,
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bbox, marker_trans, sym, *detector_, scale_factor_);
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vertex_converter<box2d<double>, dispatch_type, markers_symbolizer,
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CoordTransform, proj_transform, agg::trans_affine, conv_types>
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converter(query_extent_* 1.1,rasterizer_dispatch, sym,t_,prj_trans,tr,scale_factor_);
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if (sym.clip()) converter.template set<clip_line_tag>(); //optional clip (default: true)
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converter.template set<transform_tag>(); //always transform
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if (sym.smooth() > 0.0) converter.template set<smooth_tag>(); // optional smooth converter
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BOOST_FOREACH(geometry_type & geom, feature.paths())
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{
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converter.apply(geom);
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}
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}
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}
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else // raster markers
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{
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box2d<double> const& bbox = (*mark)->bounding_box();
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setup_label_transform(tr, bbox, feature, sym);
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coord2d center = bbox.center();
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agg::trans_affine_translation recenter(-center.x, -center.y);
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agg::trans_affine marker_trans = recenter * tr;
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boost::optional<mapnik::image_ptr> marker = (*mark)->get_bitmap_data();
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typedef raster_markers_rasterizer_dispatch<buffer_type,rasterizer, detector_type> dispatch_type;
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dispatch_type rasterizer_dispatch(*current_buffer_,*ras_ptr, **marker,
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marker_trans, sym, *detector_, scale_factor_);
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vertex_converter<box2d<double>, dispatch_type, markers_symbolizer,
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CoordTransform, proj_transform, agg::trans_affine, conv_types>
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converter(query_extent_* 1.1, rasterizer_dispatch, sym,t_,prj_trans,tr,scale_factor_);
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if (sym.clip()) converter.template set<clip_line_tag>(); //optional clip (default: true)
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converter.template set<transform_tag>(); //always transform
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if (sym.smooth() > 0.0) converter.template set<smooth_tag>(); // optional smooth converter
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BOOST_FOREACH(geometry_type & geom, feature.paths())
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{
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converter.apply(geom);
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}
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}
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}
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}
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}
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template void agg_renderer<image_32>::process(markers_symbolizer const&,
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mapnik::feature_impl &,
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proj_transform const&);
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}
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