a7ecabcde3
- use abstract class render_thunk_list_dispatch for the callback instead of template parameter render_thunks - add class scoped_glyph_positions_offset for temporary shifting of glyph positions - remove render_offset_placements
136 lines
4.6 KiB
C++
136 lines
4.6 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) 2015 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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#if defined(HAVE_CAIRO)
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// mapnik
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#include <mapnik/marker.hpp>
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#include <mapnik/svg/svg_path_adapter.hpp>
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#include <mapnik/text/glyph_positions.hpp>
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#include <mapnik/cairo/cairo_renderer.hpp>
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#include <mapnik/cairo/cairo_render_vector.hpp>
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// mapnik symbolizer generics
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#include <mapnik/renderer_common/render_group_symbolizer.hpp>
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namespace mapnik
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{
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class feature_impl;
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class proj_transform;
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struct group_symbolizer;
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namespace {
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// Render a thunk which was frozen from a previous call to
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// extract_bboxes. We should now have a new offset at which
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// to render it, and the boxes themselves should already be
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// in the detector from the placement_finder.
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template <typename T>
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struct thunk_renderer : render_thunk_list_dispatch
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{
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using renderer_type = cairo_renderer<T>;
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thunk_renderer(renderer_type & ren,
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cairo_context & context,
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cairo_face_manager & face_manager,
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renderer_common & common)
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: ren_(ren), context_(context), face_manager_(face_manager),
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common_(common)
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{}
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virtual void operator()(vector_marker_render_thunk const& thunk)
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{
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cairo_save_restore guard(context_);
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context_.set_operator(thunk.comp_op_);
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svg::vertex_stl_adapter<svg::svg_path_storage> stl_storage(thunk.src_->source());
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svg::svg_path_adapter svg_path(stl_storage);
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agg::trans_affine offset_tr = thunk.tr_;
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offset_tr.translate(offset_.x, offset_.y);
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mapnik::render_vector_marker(context_,
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svg_path,
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thunk.attrs_,
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thunk.src_->bounding_box(),
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offset_tr,
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thunk.opacity_);
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}
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virtual void operator()(raster_marker_render_thunk const& thunk)
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{
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cairo_save_restore guard(context_);
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context_.set_operator(thunk.comp_op_);
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agg::trans_affine offset_tr = thunk.tr_;
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offset_tr.translate(offset_.x, offset_.y);
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context_.add_image(offset_tr, thunk.src_, thunk.opacity_);
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}
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virtual void operator()(text_render_thunk const& thunk)
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{
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cairo_save_restore guard(context_);
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context_.set_operator(thunk.comp_op_);
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for (auto const& glyphs : thunk.placements_)
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{
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scoped_glyph_positions_offset tmp_off(*glyphs, offset_);
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if (auto const& mark = glyphs->get_marker())
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{
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ren_.render_marker(glyphs->marker_pos(),
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*mark->marker_,
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mark->transform_,
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thunk.opacity_, thunk.comp_op_);
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}
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context_.add_text(*glyphs, face_manager_, src_over, src_over, common_.scale_factor_);
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}
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}
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private:
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renderer_type & ren_;
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cairo_context & context_;
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cairo_face_manager & face_manager_;
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renderer_common & common_;
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};
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} // anonymous namespace
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template <typename T>
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void cairo_renderer<T>::process(group_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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thunk_renderer<T> ren(*this, context_, face_manager_, common_);
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render_group_symbolizer(
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sym, feature, common_.vars_, prj_trans, common_.query_extent_, common_,
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ren);
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}
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template void cairo_renderer<cairo_ptr>::process(group_symbolizer const&,
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mapnik::feature_impl &,
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proj_transform const&);
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}
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#endif // HAVE_CAIRO
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