187 lines
7.4 KiB
C++
187 lines
7.4 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) 2014 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/feature.hpp>
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#include <mapnik/debug.hpp>
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#include <mapnik/graphics.hpp>
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#include <mapnik/agg_renderer.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/marker.hpp>
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#include <mapnik/marker_cache.hpp>
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#include <mapnik/vertex_converters.hpp>
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#include <mapnik/parse_path.hpp>
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#include <mapnik/symbolizer.hpp>
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#include <mapnik/svg/svg_converter.hpp>
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#include <mapnik/svg/svg_renderer_agg.hpp>
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#include <mapnik/svg/svg_path_adapter.hpp>
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#include <mapnik/renderer_common/clipping_extent.hpp>
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#include <mapnik/renderer_common/render_pattern.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_rasterizer_scanline_aa.h"
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#include "agg_scanline_u.h"
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// for polygon_pattern_symbolizer
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#include "agg_renderer_scanline.h"
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#include "agg_span_allocator.h"
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#include "agg_span_pattern_rgba.h"
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#include "agg_image_accessors.h"
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#include "agg_conv_clip_polygon.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_pattern_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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std::string filename = get<std::string, keys::file>(sym, feature, common_.vars_);
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if (filename.empty()) return;
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boost::optional<mapnik::marker_ptr> marker_ptr = marker_cache::instance().find(filename, true);
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if (!marker_ptr || !(*marker_ptr)) return;
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boost::optional<image_ptr> pat;
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if ((*marker_ptr)->is_bitmap())
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{
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pat = (*marker_ptr)->get_bitmap_data();
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}
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else
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{
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agg::trans_affine image_tr = agg::trans_affine_scaling(common_.scale_factor_);
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auto image_transform = get_optional<transform_type>(sym, keys::image_transform);
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if (image_transform) evaluate_transform(image_tr, feature, common_.vars_, *image_transform);
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pat = render_pattern(*ras_ptr, **marker_ptr, image_tr, 1.0);
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}
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if (!pat) return;
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using clipped_geometry_type = agg::conv_clip_polygon<geometry_type>;
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using path_type = transform_path_adapter<view_transform,clipped_geometry_type>;
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agg::rendering_buffer buf(current_buffer_->raw_data(), current_buffer_->width(),
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current_buffer_->height(), current_buffer_->width() * 4);
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ras_ptr->reset();
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value_double gamma = get<value_double, keys::gamma>(sym, feature, common_.vars_);
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gamma_method_enum gamma_method = get<gamma_method_enum, keys::gamma_method>(sym, feature, common_.vars_);
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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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value_bool clip = get<value_bool, keys::clip>(sym, feature, common_.vars_);
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value_double opacity = get<double, keys::opacity>(sym, feature, common_.vars_);
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value_double simplify_tolerance = get<value_double, keys::simplify_tolerance>(sym, feature, common_.vars_);
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value_double smooth = get<value_double, keys::smooth>(sym, feature, common_.vars_);
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box2d<double> clip_box = clipping_extent(common_);
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using color = agg::rgba8;
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using order = agg::order_rgba;
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using blender_type = agg::comp_op_adaptor_rgba_pre<color, order>;
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using pixfmt_type = agg::pixfmt_custom_blend_rgba<blender_type, agg::rendering_buffer>;
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using wrap_x_type = agg::wrap_mode_repeat;
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using wrap_y_type = agg::wrap_mode_repeat;
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using img_source_type = agg::image_accessor_wrap<agg::pixfmt_rgba32_pre,
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wrap_x_type,
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wrap_y_type>;
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using span_gen_type = agg::span_pattern_rgba<img_source_type>;
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using ren_base = agg::renderer_base<pixfmt_type>;
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using renderer_type = agg::renderer_scanline_aa_alpha<ren_base,
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agg::span_allocator<agg::rgba8>,
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span_gen_type>;
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pixfmt_type pixf(buf);
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pixf.comp_op(static_cast<agg::comp_op_e>(get<composite_mode_e, keys::comp_op>(sym, feature, common_.vars_)));
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ren_base renb(pixf);
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unsigned w=(*pat)->width();
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unsigned h=(*pat)->height();
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agg::rendering_buffer pattern_rbuf((agg::int8u*)(*pat)->getBytes(),w,h,w*4);
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agg::pixfmt_rgba32_pre pixf_pattern(pattern_rbuf);
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img_source_type img_src(pixf_pattern);
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pattern_alignment_enum alignment = get<pattern_alignment_enum, keys::alignment>(sym, feature, common_.vars_);
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unsigned offset_x=0;
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unsigned offset_y=0;
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if (alignment == LOCAL_ALIGNMENT)
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{
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double x0 = 0;
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double y0 = 0;
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if (feature.num_geometries() > 0)
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{
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clipped_geometry_type clipped(feature.get_geometry(0));
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clipped.clip_box(clip_box.minx(),clip_box.miny(),clip_box.maxx(),clip_box.maxy());
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path_type path(common_.t_,clipped,prj_trans);
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path.vertex(&x0,&y0);
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}
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offset_x = unsigned(current_buffer_->width() - x0);
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offset_y = unsigned(current_buffer_->height() - y0);
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}
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span_gen_type sg(img_src, offset_x, offset_y);
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agg::span_allocator<agg::rgba8> sa;
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renderer_type rp(renb,sa, sg, unsigned(opacity * 255));
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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, common_.vars_, *transform, common_.scale_factor_);
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vertex_converter<rasterizer, clip_poly_tag,transform_tag,affine_transform_tag,simplify_tag,smooth_tag>
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converter(clip_box,*ras_ptr,sym,common_.t_,prj_trans,tr,feature,common_.vars_,common_.scale_factor_);
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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>(); // optional affine transform
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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::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, rp);
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}
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template void agg_renderer<image_32>::process(polygon_pattern_symbolizer const&,
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mapnik::feature_impl &,
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proj_transform const&);
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}
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