1285 lines
39 KiB
C++
1285 lines
39 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/image_util.hpp>
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#include <mapnik/image_util_jpeg.hpp>
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#include <mapnik/image_util_png.hpp>
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#include <mapnik/image_util_tiff.hpp>
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#include <mapnik/image_util_webp.hpp>
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#include <mapnik/image.hpp>
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#include <mapnik/image_any.hpp>
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#include <mapnik/image_view_any.hpp>
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#include <mapnik/image_view.hpp>
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#include <mapnik/palette.hpp>
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#include <mapnik/color.hpp>
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#include <mapnik/box2d.hpp>
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#include <mapnik/util/variant.hpp>
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// agg
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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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// stl
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#include <string>
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#include <fstream>
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#include <sstream>
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#include <algorithm>
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namespace mapnik
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{
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template <typename T>
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MAPNIK_DECL std::string save_to_string(T const& image,
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std::string const& type,
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rgba_palette const& palette)
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{
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std::ostringstream ss(std::ios::out|std::ios::binary);
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save_to_stream(image, ss, type, palette);
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return ss.str();
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}
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template <typename T>
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MAPNIK_DECL std::string save_to_string(T const& image,
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std::string const& type)
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{
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std::ostringstream ss(std::ios::out|std::ios::binary);
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save_to_stream(image, ss, type);
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return ss.str();
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}
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template <typename T>
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MAPNIK_DECL void save_to_file(T const& image,
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std::string const& filename,
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std::string const& type,
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rgba_palette const& palette)
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{
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std::ofstream file (filename.c_str(), std::ios::out| std::ios::trunc|std::ios::binary);
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if (file)
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{
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save_to_stream<T>(image, file, type, palette);
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}
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else throw ImageWriterException("Could not write file to " + filename );
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}
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template <typename T>
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MAPNIK_DECL void save_to_file(T const& image,
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std::string const& filename,
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std::string const& type)
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{
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std::ofstream file (filename.c_str(), std::ios::out| std::ios::trunc|std::ios::binary);
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if (file)
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{
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save_to_stream<T>(image, file, type);
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}
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else throw ImageWriterException("Could not write file to " + filename );
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}
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template <typename T>
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MAPNIK_DECL void save_to_stream(T const& image,
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std::ostream & stream,
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std::string const& type,
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rgba_palette const& palette)
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{
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if (stream && image.width() > 0 && image.height() > 0)
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{
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std::string t = type;
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std::transform(t.begin(), t.end(), t.begin(), ::tolower);
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if (t == "png" || boost::algorithm::starts_with(t, "png"))
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{
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png_saver_pal visitor(stream, t, palette);
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mapnik::util::apply_visitor(visitor, image);
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}
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else if (boost::algorithm::starts_with(t, "tif"))
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{
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throw ImageWriterException("palettes are not currently supported when writing to tiff format (yet)");
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}
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else if (boost::algorithm::starts_with(t, "jpeg"))
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{
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throw ImageWriterException("palettes are not currently supported when writing to jpeg format");
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}
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else throw ImageWriterException("unknown file type: " + type);
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}
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else throw ImageWriterException("Could not write to empty stream" );
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}
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// This can be removed once image_any and image_view_any are the only
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// items using this template
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template <>
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MAPNIK_DECL void save_to_stream<image_rgba8>(image_rgba8 const& image,
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std::ostream & stream,
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std::string const& type,
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rgba_palette const& palette)
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{
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if (stream && image.width() > 0 && image.height() > 0)
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{
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std::string t = type;
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std::transform(t.begin(), t.end(), t.begin(), ::tolower);
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if (t == "png" || boost::algorithm::starts_with(t, "png"))
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{
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png_saver_pal visitor(stream, t, palette);
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visitor(image);
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//mapnik::util::apply_visitor(visitor, image);
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}
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else if (boost::algorithm::starts_with(t, "tif"))
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{
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throw ImageWriterException("palettes are not currently supported when writing to tiff format (yet)");
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}
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else if (boost::algorithm::starts_with(t, "jpeg"))
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{
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throw ImageWriterException("palettes are not currently supported when writing to jpeg format");
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}
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else throw ImageWriterException("unknown file type: " + type);
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}
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else throw ImageWriterException("Could not write to empty stream" );
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}
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// This can be removed once image_any and image_view_any are the only
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// items using this template
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template <>
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MAPNIK_DECL void save_to_stream<image_view_rgba8>(image_view_rgba8 const& image,
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std::ostream & stream,
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std::string const& type,
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rgba_palette const& palette)
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{
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if (stream && image.width() > 0 && image.height() > 0)
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{
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std::string t = type;
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std::transform(t.begin(), t.end(), t.begin(), ::tolower);
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if (t == "png" || boost::algorithm::starts_with(t, "png"))
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{
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png_saver_pal visitor(stream, t, palette);
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visitor(image);
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//mapnik::util::apply_visitor(visitor, image);
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}
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else if (boost::algorithm::starts_with(t, "tif"))
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{
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throw ImageWriterException("palettes are not currently supported when writing to tiff format (yet)");
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}
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else if (boost::algorithm::starts_with(t, "jpeg"))
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{
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throw ImageWriterException("palettes are not currently supported when writing to jpeg format");
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}
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else throw ImageWriterException("unknown file type: " + type);
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}
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else throw ImageWriterException("Could not write to empty stream" );
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}
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template <typename T>
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MAPNIK_DECL void save_to_stream(T const& image,
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std::ostream & stream,
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std::string const& type)
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{
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if (stream && image.width() > 0 && image.height() > 0)
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{
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std::string t = type;
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std::transform(t.begin(), t.end(), t.begin(), ::tolower);
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if (t == "png" || boost::algorithm::starts_with(t, "png"))
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{
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png_saver visitor(stream, t);
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util::apply_visitor(visitor, image);
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}
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else if (boost::algorithm::starts_with(t, "tif"))
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{
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tiff_saver visitor(stream, t);
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util::apply_visitor(visitor, image);
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}
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else if (boost::algorithm::starts_with(t, "jpeg"))
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{
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jpeg_saver visitor(stream, t);
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util::apply_visitor(visitor, image);
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}
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else if (boost::algorithm::starts_with(t, "webp"))
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{
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webp_saver visitor(stream, t);
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util::apply_visitor(visitor, image);
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}
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else throw ImageWriterException("unknown file type: " + type);
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}
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else throw ImageWriterException("Could not write to empty stream" );
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}
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// This can be removed once image_any and image_view_any are the only
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// items using this template
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template <>
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MAPNIK_DECL void save_to_stream<image_rgba8>(image_rgba8 const& image,
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std::ostream & stream,
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std::string const& type)
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{
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if (stream && image.width() > 0 && image.height() > 0)
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{
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std::string t = type;
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std::transform(t.begin(), t.end(), t.begin(), ::tolower);
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if (t == "png" || boost::algorithm::starts_with(t, "png"))
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{
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png_saver visitor(stream, t);
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visitor(image);
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//util::apply_visitor(visitor, image);
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}
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else if (boost::algorithm::starts_with(t, "tif"))
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{
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tiff_saver visitor(stream, t);
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visitor(image);
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//util::apply_visitor(visitor, image);
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}
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else if (boost::algorithm::starts_with(t, "jpeg"))
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{
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jpeg_saver visitor(stream, t);
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visitor(image);
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//util::apply_visitor(visitor, image);
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}
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else if (boost::algorithm::starts_with(t, "webp"))
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{
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webp_saver visitor(stream, t);
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visitor(image);
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//util::apply_visitor(visitor, image);
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}
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else throw ImageWriterException("unknown file type: " + type);
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}
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else throw ImageWriterException("Could not write to empty stream" );
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}
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// This can be removed once image_any and image_view_any are the only
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// items using this template
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template <>
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MAPNIK_DECL void save_to_stream<image_view_rgba8>(image_view_rgba8 const& image,
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std::ostream & stream,
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std::string const& type)
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{
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if (stream && image.width() > 0 && image.height() > 0)
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{
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std::string t = type;
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std::transform(t.begin(), t.end(), t.begin(), ::tolower);
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if (t == "png" || boost::algorithm::starts_with(t, "png"))
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{
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png_saver visitor(stream, t);
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visitor(image);
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//util::apply_visitor(visitor, image);
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}
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else if (boost::algorithm::starts_with(t, "tif"))
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{
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tiff_saver visitor(stream, t);
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visitor(image);
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//util::apply_visitor(visitor, image);
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}
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else if (boost::algorithm::starts_with(t, "jpeg"))
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{
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jpeg_saver visitor(stream, t);
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visitor(image);
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//util::apply_visitor(visitor, image);
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}
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else if (boost::algorithm::starts_with(t, "webp"))
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{
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webp_saver visitor(stream, t);
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visitor(image);
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//util::apply_visitor(visitor, image);
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}
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else throw ImageWriterException("unknown file type: " + type);
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}
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else throw ImageWriterException("Could not write to empty stream" );
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}
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template <typename T>
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MAPNIK_DECL void save_to_file(T const& image, std::string const& filename)
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{
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boost::optional<std::string> type = type_from_filename(filename);
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if (type)
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{
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save_to_file<T>(image, filename, *type);
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}
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else throw ImageWriterException("Could not write file to " + filename );
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}
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template <typename T>
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MAPNIK_DECL void save_to_file(T const& image, std::string const& filename, rgba_palette const& palette)
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{
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boost::optional<std::string> type = type_from_filename(filename);
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if (type)
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{
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save_to_file<T>(image, filename, *type, palette);
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}
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else throw ImageWriterException("Could not write file to " + filename );
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}
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// image_rgba8
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template MAPNIK_DECL void save_to_file<image_rgba8>(image_rgba8 const&,
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std::string const&,
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std::string const&);
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template MAPNIK_DECL void save_to_file<image_rgba8>(image_rgba8 const&,
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std::string const&,
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std::string const&,
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rgba_palette const& palette);
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template MAPNIK_DECL void save_to_file<image_rgba8>(image_rgba8 const&,
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std::string const&);
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template MAPNIK_DECL void save_to_file<image_rgba8>(image_rgba8 const&,
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std::string const&,
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rgba_palette const& palette);
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template MAPNIK_DECL std::string save_to_string<image_rgba8>(image_rgba8 const&,
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std::string const&);
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template MAPNIK_DECL std::string save_to_string<image_rgba8>(image_rgba8 const&,
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std::string const&,
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rgba_palette const& palette);
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// image_view_any
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template MAPNIK_DECL void save_to_file<image_view_any> (image_view_any const&,
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std::string const&,
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std::string const&);
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template MAPNIK_DECL void save_to_file<image_view_any> (image_view_any const&,
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std::string const&,
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std::string const&,
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rgba_palette const& palette);
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template MAPNIK_DECL void save_to_file<image_view_any> (image_view_any const&,
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std::string const&);
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template MAPNIK_DECL void save_to_file<image_view_any> (image_view_any const&,
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std::string const&,
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rgba_palette const& palette);
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template MAPNIK_DECL std::string save_to_string<image_view_any> (image_view_any const&,
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std::string const&);
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template MAPNIK_DECL std::string save_to_string<image_view_any> (image_view_any const&,
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std::string const&,
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rgba_palette const& palette);
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// image_any
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template MAPNIK_DECL void save_to_file<image_any>(image_any const&,
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std::string const&,
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std::string const&);
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template MAPNIK_DECL void save_to_file<image_any>(image_any const&,
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std::string const&,
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std::string const&,
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rgba_palette const& palette);
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template MAPNIK_DECL void save_to_file<image_any>(image_any const&,
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std::string const&);
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template MAPNIK_DECL void save_to_file<image_any>(image_any const&,
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std::string const&,
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rgba_palette const& palette);
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template MAPNIK_DECL std::string save_to_string<image_any>(image_any const&,
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std::string const&);
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template MAPNIK_DECL std::string save_to_string<image_any>(image_any const&,
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std::string const&,
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rgba_palette const& palette);
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namespace detail {
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struct is_solid_visitor
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{
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template <typename T>
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bool operator() (T const & data)
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{
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using pixel_type = typename T::pixel_type;
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if (data.width() > 0 && data.height() > 0)
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{
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pixel_type const* first_row = data.getRow(0);
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pixel_type const first_pixel = first_row[0];
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for (unsigned y = 0; y < data.height(); ++y)
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{
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pixel_type const * row = data.getRow(y);
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for (unsigned x = 0; x < data.width(); ++x)
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{
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if (first_pixel != row[x])
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{
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return false;
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}
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}
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}
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}
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return true;
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}
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};
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template bool is_solid_visitor::operator()<image_rgba8> (image_rgba8 const& data);
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template bool is_solid_visitor::operator()<image_gray8> (image_gray8 const& data);
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template bool is_solid_visitor::operator()<image_gray16> (image_gray16 const& data);
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template bool is_solid_visitor::operator()<image_gray32f> (image_gray32f const& data);
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template bool is_solid_visitor::operator()<image_view_rgba8> (image_view_rgba8 const& data);
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template bool is_solid_visitor::operator()<image_view_gray8> (image_view_gray8 const& data);
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template bool is_solid_visitor::operator()<image_view_gray16> (image_view_gray16 const& data);
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template bool is_solid_visitor::operator()<image_view_gray32f> (image_view_gray32f const& data);
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template<>
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bool is_solid_visitor::operator()<image_null> (image_null const&)
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{
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return true;
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}
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} // end detail ns
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template <typename T>
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MAPNIK_DECL bool is_solid(T const& image)
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{
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return util::apply_visitor(detail::is_solid_visitor(), image);
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}
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template MAPNIK_DECL bool is_solid<image_any> (image_any const&);
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template MAPNIK_DECL bool is_solid<image_view_any> (image_view_any const&);
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// Temporary until image_rgba8 is removed from passing
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template <>
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MAPNIK_DECL bool is_solid<image_rgba8>(image_rgba8 const& image)
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{
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detail::is_solid_visitor visitor;
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return visitor(image);
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}
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// Temporary until image_view_rgba8 is removed from passing
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template <>
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MAPNIK_DECL bool is_solid<image_view_rgba8>(image_view_rgba8 const& image)
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{
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detail::is_solid_visitor visitor;
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return visitor(image);
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}
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namespace detail {
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struct premultiply_visitor
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{
|
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template <typename T>
|
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bool operator() (T & data)
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{
|
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throw std::runtime_error("Error: Premultiply with " + std::string(typeid(data).name()) + " is not supported");
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}
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};
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template <>
|
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bool premultiply_visitor::operator()<image_rgba8> (image_rgba8 & data)
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{
|
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if (!data.get_premultiplied())
|
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{
|
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agg::rendering_buffer buffer(data.getBytes(),data.width(),data.height(),data.width() * 4);
|
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agg::pixfmt_rgba32 pixf(buffer);
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pixf.premultiply();
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data.set_premultiplied(true);
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return true;
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}
|
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return false;
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}
|
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|
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struct demultiply_visitor
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|
{
|
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template <typename T>
|
|
bool operator() (T & data)
|
|
{
|
|
throw std::runtime_error("Error: Premultiply with " + std::string(typeid(data).name()) + " is not supported");
|
|
}
|
|
|
|
};
|
|
|
|
template <>
|
|
bool demultiply_visitor::operator()<image_rgba8> (image_rgba8 & data)
|
|
{
|
|
if (data.get_premultiplied())
|
|
{
|
|
agg::rendering_buffer buffer(data.getBytes(),data.width(),data.height(),data.width() * 4);
|
|
agg::pixfmt_rgba32_pre pixf(buffer);
|
|
pixf.demultiply();
|
|
data.set_premultiplied(false);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
struct set_premultiplied_visitor
|
|
{
|
|
set_premultiplied_visitor(bool status)
|
|
: status_(status) {}
|
|
|
|
template <typename T>
|
|
void operator() (T & data)
|
|
{
|
|
data.set_premultiplied(status_);
|
|
}
|
|
private:
|
|
bool status_;
|
|
};
|
|
|
|
} // end detail ns
|
|
|
|
template <typename T>
|
|
MAPNIK_DECL bool premultiply_alpha(T & image)
|
|
{
|
|
return util::apply_visitor(detail::premultiply_visitor(), image);
|
|
}
|
|
|
|
template MAPNIK_DECL bool premultiply_alpha<image_any> (image_any &);
|
|
|
|
// Temporary, can be removed once image_view_any and image_any are the only ones passed
|
|
template <>
|
|
MAPNIK_DECL bool premultiply_alpha<image_rgba8>(image_rgba8 & image)
|
|
{
|
|
detail::premultiply_visitor visit;
|
|
return visit(image);
|
|
}
|
|
|
|
template <typename T>
|
|
MAPNIK_DECL bool demultiply_alpha(T & image)
|
|
{
|
|
return util::apply_visitor(detail::demultiply_visitor(), image);
|
|
}
|
|
|
|
template MAPNIK_DECL bool demultiply_alpha<image_any> (image_any &);
|
|
|
|
// Temporary, can be removed once image_view_any and image_any are the only ones passed
|
|
template <>
|
|
MAPNIK_DECL bool demultiply_alpha<image_rgba8>(image_rgba8 & image)
|
|
{
|
|
detail::demultiply_visitor visit;
|
|
return visit(image);
|
|
}
|
|
|
|
template <typename T>
|
|
MAPNIK_DECL void set_premultiplied_alpha(T & image, bool status)
|
|
{
|
|
util::apply_visitor(detail::set_premultiplied_visitor(status), image);
|
|
}
|
|
|
|
template void set_premultiplied_alpha<image_any> (image_any &, bool);
|
|
|
|
// Temporary, can be removed once image_view_any and image_any are the only ones passed
|
|
template <>
|
|
MAPNIK_DECL void set_premultiplied_alpha<image_rgba8>(image_rgba8 & image, bool status)
|
|
{
|
|
detail::set_premultiplied_visitor visit(status);
|
|
visit(image);
|
|
}
|
|
|
|
namespace detail {
|
|
|
|
struct visitor_set_alpha
|
|
{
|
|
visitor_set_alpha(float opacity)
|
|
: opacity_(opacity) {}
|
|
|
|
template <typename T>
|
|
void operator() (T & data)
|
|
{
|
|
throw std::runtime_error("Error: set_alpha with " + std::string(typeid(data).name()) + " is not supported");
|
|
}
|
|
|
|
private:
|
|
float opacity_;
|
|
|
|
};
|
|
|
|
template <>
|
|
void visitor_set_alpha::operator()<image_rgba8> (image_rgba8 & data)
|
|
{
|
|
using pixel_type = typename image_rgba8::pixel_type;
|
|
for (unsigned int y = 0; y < data.height(); ++y)
|
|
{
|
|
pixel_type* row_to = data.getRow(y);
|
|
for (unsigned int x = 0; x < data.width(); ++x)
|
|
{
|
|
pixel_type rgba = row_to[x];
|
|
pixel_type a0 = (rgba >> 24) & 0xff;
|
|
pixel_type a1 = pixel_type( ((rgba >> 24) & 0xff) * opacity_ );
|
|
//unsigned a1 = opacity;
|
|
if (a0 == a1) continue;
|
|
|
|
pixel_type r = rgba & 0xff;
|
|
pixel_type g = (rgba >> 8 ) & 0xff;
|
|
pixel_type b = (rgba >> 16) & 0xff;
|
|
|
|
row_to[x] = (a1 << 24)| (b << 16) | (g << 8) | (r) ;
|
|
}
|
|
}
|
|
}
|
|
|
|
} // end detail ns
|
|
|
|
template<>
|
|
MAPNIK_DECL void set_alpha<image_any> (image_any & data, float opacity)
|
|
{
|
|
// Prior to calling the data must not be premultiplied
|
|
bool remultiply = mapnik::demultiply_alpha(data);
|
|
util::apply_visitor(detail::visitor_set_alpha(opacity), data);
|
|
if (remultiply)
|
|
{
|
|
mapnik::premultiply_alpha(data);
|
|
}
|
|
}
|
|
|
|
// TEMPORARY can be removed once image_any is only way it is being passed.
|
|
template<>
|
|
MAPNIK_DECL void set_alpha<image_rgba8> (image_rgba8 & data, float opacity)
|
|
{
|
|
// Prior to calling the data must not be premultiplied
|
|
bool remultiply = mapnik::demultiply_alpha(data);
|
|
detail::visitor_set_alpha visit(opacity);
|
|
visit(data);
|
|
if (remultiply)
|
|
{
|
|
mapnik::premultiply_alpha(data);
|
|
}
|
|
}
|
|
|
|
namespace detail {
|
|
|
|
struct visitor_set_grayscale_to_alpha
|
|
{
|
|
template <typename T>
|
|
void operator() (T & data)
|
|
{
|
|
throw std::runtime_error("Error: set_grayscale_to_alpha with " + std::string(typeid(data).name()) + " is not supported");
|
|
}
|
|
};
|
|
|
|
template <>
|
|
void visitor_set_grayscale_to_alpha::operator()<image_rgba8> (image_rgba8 & data)
|
|
{
|
|
using pixel_type = typename image_rgba8::pixel_type;
|
|
for (unsigned int y = 0; y < data.height(); ++y)
|
|
{
|
|
pixel_type* row_from = data.getRow(y);
|
|
for (unsigned int x = 0; x < data.width(); ++x)
|
|
{
|
|
pixel_type rgba = row_from[x];
|
|
pixel_type r = rgba & 0xff;
|
|
pixel_type g = (rgba >> 8 ) & 0xff;
|
|
pixel_type b = (rgba >> 16) & 0xff;
|
|
|
|
// magic numbers for grayscale
|
|
pixel_type a = static_cast<pixel_type>(std::ceil((r * .3) + (g * .59) + (b * .11)));
|
|
|
|
row_from[x] = (a << 24)| (255 << 16) | (255 << 8) | (255) ;
|
|
}
|
|
}
|
|
}
|
|
|
|
} // end detail ns
|
|
|
|
template<>
|
|
MAPNIK_DECL void set_grayscale_to_alpha<image_any> (image_any & data)
|
|
{
|
|
// Prior to calling the data must not be premultiplied
|
|
bool remultiply = mapnik::demultiply_alpha(data);
|
|
util::apply_visitor(detail::visitor_set_grayscale_to_alpha(), data);
|
|
if (remultiply)
|
|
{
|
|
mapnik::premultiply_alpha(data);
|
|
}
|
|
}
|
|
|
|
// TEMPORARY can be removed once image_any is only way it is being passed.
|
|
template<>
|
|
MAPNIK_DECL void set_grayscale_to_alpha<image_rgba8> (image_rgba8 & data)
|
|
{
|
|
// Prior to calling the data must not be premultiplied
|
|
bool remultiply = mapnik::demultiply_alpha(data);
|
|
detail::visitor_set_grayscale_to_alpha visit;
|
|
visit(data);
|
|
if (remultiply)
|
|
{
|
|
mapnik::premultiply_alpha(data);
|
|
}
|
|
}
|
|
|
|
namespace detail {
|
|
|
|
struct visitor_set_color_to_alpha
|
|
{
|
|
visitor_set_color_to_alpha(color const& c)
|
|
: c_(c) {}
|
|
|
|
template <typename T>
|
|
void operator() (T & data)
|
|
{
|
|
throw std::runtime_error("Error: set_color_to_alpha with " + std::string(typeid(data).name()) + " is not supported");
|
|
}
|
|
|
|
private:
|
|
color const& c_;
|
|
|
|
};
|
|
|
|
template <>
|
|
void visitor_set_color_to_alpha::operator()<image_rgba8> (image_rgba8 & data)
|
|
{
|
|
using pixel_type = typename image_rgba8::pixel_type;
|
|
for (unsigned y = 0; y < data.height(); ++y)
|
|
{
|
|
pixel_type* row_from = data.getRow(y);
|
|
for (unsigned x = 0; x < data.width(); ++x)
|
|
{
|
|
pixel_type rgba = row_from[x];
|
|
pixel_type r = rgba & 0xff;
|
|
pixel_type g = (rgba >> 8 ) & 0xff;
|
|
pixel_type b = (rgba >> 16) & 0xff;
|
|
if (r == c_.red() && g == c_.green() && b == c_.blue())
|
|
{
|
|
row_from[x] = 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
} // end detail ns
|
|
|
|
template<>
|
|
MAPNIK_DECL void set_color_to_alpha<image_any> (image_any & data, color const& c)
|
|
{
|
|
// Prior to calling the data must not be premultiplied
|
|
bool remultiply = mapnik::demultiply_alpha(data);
|
|
util::apply_visitor(detail::visitor_set_color_to_alpha(c), data);
|
|
if (remultiply)
|
|
{
|
|
mapnik::premultiply_alpha(data);
|
|
}
|
|
}
|
|
|
|
// TEMPORARY can be removed once image_any is only way it is being passed.
|
|
template<>
|
|
MAPNIK_DECL void set_color_to_alpha<image_rgba8> (image_rgba8 & data, color const& c)
|
|
{
|
|
// Prior to calling the data must not be premultiplied
|
|
bool remultiply = mapnik::demultiply_alpha(data);
|
|
detail::visitor_set_color_to_alpha visit(c);
|
|
visit(data);
|
|
if (remultiply)
|
|
{
|
|
mapnik::premultiply_alpha(data);
|
|
}
|
|
}
|
|
|
|
namespace detail {
|
|
|
|
template <typename T1>
|
|
struct visitor_fill
|
|
{
|
|
visitor_fill(T1 const& val)
|
|
: val_(val) {}
|
|
|
|
template <typename T2>
|
|
void operator() (T2 & data)
|
|
{
|
|
using pixel_type = typename T2::pixel_type;
|
|
pixel_type val = static_cast<pixel_type>(val_);
|
|
data.set(val);
|
|
}
|
|
|
|
private:
|
|
T1 const& val_;
|
|
};
|
|
|
|
template<>
|
|
struct visitor_fill<color>
|
|
{
|
|
visitor_fill(color const& val)
|
|
: val_(val) {}
|
|
|
|
void operator() (image_rgba8 & data)
|
|
{
|
|
using pixel_type = typename image_rgba8::pixel_type;
|
|
pixel_type val = static_cast<pixel_type>(val_.rgba());
|
|
data.set(val);
|
|
data.set_premultiplied(val_.get_premultiplied());
|
|
}
|
|
|
|
template <typename T2>
|
|
void operator() (T2 & data)
|
|
{
|
|
using pixel_type = typename T2::pixel_type;
|
|
pixel_type val = static_cast<pixel_type>(val_.rgba());
|
|
data.set(val);
|
|
}
|
|
|
|
private:
|
|
color const& val_;
|
|
};
|
|
|
|
} // end detail ns
|
|
|
|
// For all the generic data types.
|
|
template <typename T1, typename T2>
|
|
MAPNIK_DECL void fill (T1 & data, T2 const& val)
|
|
{
|
|
util::apply_visitor(detail::visitor_fill<T2>(val), data);
|
|
}
|
|
|
|
template MAPNIK_DECL void fill(image_any &, color const&);
|
|
template MAPNIK_DECL void fill(image_any &, uint32_t const&);
|
|
template MAPNIK_DECL void fill(image_any &, int32_t const&);
|
|
template MAPNIK_DECL void fill(image_any &, uint16_t const&);
|
|
template MAPNIK_DECL void fill(image_any &, int16_t const&);
|
|
template MAPNIK_DECL void fill(image_any &, uint8_t const&);
|
|
template MAPNIK_DECL void fill(image_any &, int8_t const&);
|
|
template MAPNIK_DECL void fill(image_any &, float const&);
|
|
template MAPNIK_DECL void fill(image_any &, double const&);
|
|
|
|
|
|
// Temporary remove these later!
|
|
template <>
|
|
MAPNIK_DECL void fill<image_rgba8, color> (image_rgba8 & data , color const& val)
|
|
{
|
|
detail::visitor_fill<color> visitor(val);
|
|
visitor(data);
|
|
}
|
|
|
|
// Temporary remove these later!
|
|
template <>
|
|
MAPNIK_DECL void fill<image_rgba8, uint32_t> (image_rgba8 & data , uint32_t const& val)
|
|
{
|
|
detail::visitor_fill<uint32_t> visitor(val);
|
|
visitor(data);
|
|
}
|
|
|
|
// Temporary remove these later!
|
|
template <>
|
|
MAPNIK_DECL void fill<image_rgba8, int32_t> (image_rgba8 & data , int32_t const& val)
|
|
{
|
|
detail::visitor_fill<int32_t> visitor(val);
|
|
visitor(data);
|
|
}
|
|
|
|
namespace detail {
|
|
|
|
struct visitor_set_rectangle
|
|
{
|
|
visitor_set_rectangle(image_any const & src, int x0, int y0)
|
|
: src_(src), x0_(x0), y0_(y0) {}
|
|
|
|
template <typename T>
|
|
void operator() (T & dst)
|
|
{
|
|
using pixel_type = typename T::pixel_type;
|
|
T src = util::get<T>(src_);
|
|
box2d<int> ext0(0,0,dst.width(),dst.height());
|
|
box2d<int> ext1(x0_,y0_,x0_+src.width(),y0_+src.height());
|
|
|
|
if (ext0.intersects(ext1))
|
|
{
|
|
box2d<int> box = ext0.intersect(ext1);
|
|
for (std::size_t y = box.miny(); y < box.maxy(); ++y)
|
|
{
|
|
pixel_type* row_to = dst.getRow(y);
|
|
pixel_type const * row_from = src.getRow(y-y0_);
|
|
|
|
for (std::size_t x = box.minx(); x < box.maxx(); ++x)
|
|
{
|
|
row_to[x] = row_from[x-x0_];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
private:
|
|
image_any const& src_;
|
|
int x0_;
|
|
int y0_;
|
|
};
|
|
|
|
template <>
|
|
void visitor_set_rectangle::operator()<image_rgba8> (image_rgba8 & dst)
|
|
{
|
|
using pixel_type = typename image_rgba8::pixel_type;
|
|
image_rgba8 src = util::get<image_rgba8>(src_);
|
|
box2d<int> ext0(0,0,dst.width(),dst.height());
|
|
box2d<int> ext1(x0_,y0_,x0_+src.width(),y0_+src.height());
|
|
|
|
if (ext0.intersects(ext1))
|
|
{
|
|
box2d<int> box = ext0.intersect(ext1);
|
|
for (std::size_t y = box.miny(); y < box.maxy(); ++y)
|
|
{
|
|
pixel_type* row_to = dst.getRow(y);
|
|
pixel_type const * row_from = src.getRow(y-y0_);
|
|
|
|
for (std::size_t x = box.minx(); x < box.maxx(); ++x)
|
|
{
|
|
if (row_from[x-x0_] & 0xff000000) // Don't change if alpha == 0
|
|
{
|
|
row_to[x] = row_from[x-x0_];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
template<>
|
|
void visitor_set_rectangle::operator()<image_null> (image_null &)
|
|
{
|
|
throw std::runtime_error("Set rectangle not support for null images");
|
|
}
|
|
|
|
} // end detail ns
|
|
|
|
template <typename T>
|
|
MAPNIK_DECL void set_rectangle (T & dst, T const& src, int x, int y)
|
|
{
|
|
detail::visitor_set_rectangle visit(src, x, y);
|
|
visit(dst);
|
|
}
|
|
|
|
template <>
|
|
MAPNIK_DECL void set_rectangle<image_any> (image_any & dst, image_any const& src, int x, int y)
|
|
{
|
|
util::apply_visitor(detail::visitor_set_rectangle(src, x, y), dst);
|
|
}
|
|
|
|
namespace detail
|
|
{
|
|
|
|
struct visitor_composite_pixel
|
|
{
|
|
// Obviously c variable would only work for rgba8 currently, but didn't want to
|
|
// make this a template class until new rgba types exist.
|
|
visitor_composite_pixel(unsigned op, int x,int y, unsigned c, unsigned cover, double opacity)
|
|
: opacity_(opacity),
|
|
op_(op),
|
|
x_(x),
|
|
y_(y),
|
|
c_(c),
|
|
cover_(cover) {}
|
|
|
|
template <typename T>
|
|
void operator() (T & data)
|
|
{
|
|
throw std::runtime_error("Composite pixel is not supported for this data type");
|
|
}
|
|
|
|
private:
|
|
double opacity_;
|
|
unsigned op_;
|
|
int x_;
|
|
int y_;
|
|
int c_;
|
|
unsigned cover_;
|
|
|
|
};
|
|
|
|
template<>
|
|
void visitor_composite_pixel::operator()<image_rgba8> (image_rgba8 & data)
|
|
{
|
|
using color_type = agg::rgba8;
|
|
using value_type = color_type::value_type;
|
|
using order_type = agg::order_rgba;
|
|
using blender_type = agg::comp_op_adaptor_rgba<color_type,order_type>;
|
|
|
|
if (mapnik::check_bounds(data, x_, y_))
|
|
{
|
|
unsigned rgba = data(x_,y_);
|
|
unsigned ca = (unsigned)(((c_ >> 24) & 0xff) * opacity_);
|
|
unsigned cb = (c_ >> 16 ) & 0xff;
|
|
unsigned cg = (c_ >> 8) & 0xff;
|
|
unsigned cr = (c_ & 0xff);
|
|
blender_type::blend_pix(op_, (value_type*)&rgba, cr, cg, cb, ca, cover_);
|
|
data(x_,y_) = rgba;
|
|
}
|
|
}
|
|
|
|
} // end detail ns
|
|
|
|
template <typename T>
|
|
MAPNIK_DECL void composite_pixel(T & data, unsigned op, int x, int y, unsigned c, unsigned cover, double opacity )
|
|
{
|
|
util::apply_visitor(detail::visitor_composite_pixel(op, x, y, c, cover, opacity), data);
|
|
}
|
|
|
|
// Temporary delete later
|
|
template <>
|
|
MAPNIK_DECL void composite_pixel<image_rgba8>(image_rgba8 & data, unsigned op, int x, int y, unsigned c, unsigned cover, double opacity )
|
|
{
|
|
detail::visitor_composite_pixel visitor(op, x, y, c, cover, opacity);
|
|
visitor(data);
|
|
}
|
|
|
|
namespace detail {
|
|
|
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template <typename T1>
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struct visitor_set_pixel
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{
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visitor_set_pixel(std::size_t x, std::size_t y, T1 const& val)
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: val_(val), x_(x), y_(y) {}
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template <typename T2>
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void operator() (T2 & data)
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{
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using pixel_type = typename T2::pixel_type;
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pixel_type val = static_cast<pixel_type>(val_);
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if (check_bounds(data, x_, y_))
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{
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data(x_, y_) = val;
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}
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}
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private:
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T1 const& val_;
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std::size_t x_;
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std::size_t y_;
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};
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template<>
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struct visitor_set_pixel<color>
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{
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visitor_set_pixel(std::size_t x, std::size_t y, color const& val)
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: val_(val), x_(x), y_(y) {}
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template <typename T2>
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void operator() (T2 & data)
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{
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using pixel_type = typename T2::pixel_type;
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pixel_type val;
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if (data.get_premultiplied() && !val_.get_premultiplied())
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{
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color tmp(val_);
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tmp.premultiply();
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val = static_cast<pixel_type>(tmp.rgba());
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}
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else if (!data.get_premultiplied() && val_.get_premultiplied())
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{
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color tmp(val_);
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tmp.demultiply();
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val = static_cast<pixel_type>(tmp.rgba());
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}
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else
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{
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val = static_cast<pixel_type>(val_.rgba());
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}
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if (check_bounds(data, x_, y_))
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{
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data(x_, y_) = val;
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}
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}
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private:
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color const& val_;
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std::size_t x_;
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std::size_t y_;
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};
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} // end detail ns
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// For all the generic data types.
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template <typename T1, typename T2>
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MAPNIK_DECL void set_pixel (T1 & data, std::size_t x, std::size_t y, T2 const& val)
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{
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util::apply_visitor(detail::visitor_set_pixel<T2>(x, y, val), data);
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}
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template MAPNIK_DECL void set_pixel(image_any &, std::size_t, std::size_t, color const&);
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template MAPNIK_DECL void set_pixel(image_any &, std::size_t, std::size_t, uint32_t const&);
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template MAPNIK_DECL void set_pixel(image_any &, std::size_t, std::size_t, int32_t const&);
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template MAPNIK_DECL void set_pixel(image_any &, std::size_t, std::size_t, uint16_t const&);
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template MAPNIK_DECL void set_pixel(image_any &, std::size_t, std::size_t, int16_t const&);
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template MAPNIK_DECL void set_pixel(image_any &, std::size_t, std::size_t, uint8_t const&);
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template MAPNIK_DECL void set_pixel(image_any &, std::size_t, std::size_t, int8_t const&);
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template MAPNIK_DECL void set_pixel(image_any &, std::size_t, std::size_t, float const&);
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template MAPNIK_DECL void set_pixel(image_any &, std::size_t, std::size_t, double const&);
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|
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// Temporary remove these later!
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template <>
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MAPNIK_DECL void set_pixel<image_rgba8, color> (image_rgba8 & data, std::size_t x, std::size_t y, color const& val)
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{
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detail::visitor_set_pixel<color> visitor(x, y, val);
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visitor(data);
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}
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// Temporary remove these later!
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template <>
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MAPNIK_DECL void set_pixel<image_rgba8, uint32_t> (image_rgba8 & data, std::size_t x, std::size_t y, uint32_t const& val)
|
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{
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detail::visitor_set_pixel<uint32_t> visitor(x, y, val);
|
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visitor(data);
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}
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|
|
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// Temporary remove these later!
|
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template <>
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MAPNIK_DECL void set_pixel<image_rgba8, int32_t> (image_rgba8 & data, std::size_t x, std::size_t y, int32_t const& val)
|
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{
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detail::visitor_set_pixel<int32_t> visitor(x, y, val);
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visitor(data);
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}
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namespace detail {
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template <typename T1>
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struct visitor_get_pixel
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|
{
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visitor_get_pixel(std::size_t x, std::size_t y)
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: x_(x), y_(y) {}
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|
|
|
template <typename T2>
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|
T1 operator() (T2 const& data)
|
|
{
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|
if (check_bounds(data, x_, y_))
|
|
{
|
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return static_cast<T1>(data(x_, y_));
|
|
}
|
|
else
|
|
{
|
|
throw std::runtime_error("Out of range for dataset with get pixel");
|
|
}
|
|
}
|
|
|
|
private:
|
|
std::size_t x_;
|
|
std::size_t y_;
|
|
};
|
|
|
|
template<>
|
|
struct visitor_get_pixel<color>
|
|
{
|
|
visitor_get_pixel(std::size_t x, std::size_t y)
|
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: x_(x), y_(y) {}
|
|
|
|
template <typename T2>
|
|
color operator() (T2 const& data)
|
|
{
|
|
if (check_bounds(data, x_, y_))
|
|
{
|
|
return color(static_cast<uint32_t>(data(x_, y_)), data.get_premultiplied());
|
|
}
|
|
else
|
|
{
|
|
throw std::runtime_error("Out of range for dataset with get pixel");
|
|
}
|
|
}
|
|
|
|
private:
|
|
std::size_t x_;
|
|
std::size_t y_;
|
|
};
|
|
|
|
} // end detail ns
|
|
|
|
// For all the generic data types.
|
|
template <typename T1, typename T2>
|
|
MAPNIK_DECL T2 get_pixel (T1 const& data, std::size_t x, std::size_t y)
|
|
{
|
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return util::apply_visitor(detail::visitor_get_pixel<T2>(x, y), data);
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}
|
|
|
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template MAPNIK_DECL color get_pixel(image_any const&, std::size_t, std::size_t);
|
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template MAPNIK_DECL uint32_t get_pixel(image_any const&, std::size_t, std::size_t);
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template MAPNIK_DECL int32_t get_pixel(image_any const&, std::size_t, std::size_t);
|
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template MAPNIK_DECL uint16_t get_pixel(image_any const&, std::size_t, std::size_t);
|
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template MAPNIK_DECL int16_t get_pixel(image_any const&, std::size_t, std::size_t);
|
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template MAPNIK_DECL uint8_t get_pixel(image_any const&, std::size_t, std::size_t);
|
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template MAPNIK_DECL int8_t get_pixel(image_any const&, std::size_t, std::size_t);
|
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template MAPNIK_DECL float get_pixel(image_any const&, std::size_t, std::size_t);
|
|
template MAPNIK_DECL double get_pixel(image_any const&, std::size_t, std::size_t);
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|
|
|
|
|
// Temporary remove these later!
|
|
template <>
|
|
MAPNIK_DECL color get_pixel<image_rgba8, color> (image_rgba8 const& data, std::size_t x, std::size_t y)
|
|
{
|
|
detail::visitor_get_pixel<color> visitor(x, y);
|
|
return visitor(data);
|
|
}
|
|
|
|
// Temporary remove these later!
|
|
template <>
|
|
MAPNIK_DECL uint32_t get_pixel<image_rgba8, uint32_t> (image_rgba8 const& data, std::size_t x, std::size_t y)
|
|
{
|
|
detail::visitor_get_pixel<uint32_t> visitor(x, y);
|
|
return visitor(data);
|
|
}
|
|
|
|
// Temporary remove these later!
|
|
template <>
|
|
MAPNIK_DECL int32_t get_pixel<image_rgba8, int32_t> (image_rgba8 const& data, std::size_t x, std::size_t y)
|
|
{
|
|
detail::visitor_get_pixel<int32_t> visitor(x, y);
|
|
return visitor(data);
|
|
}
|
|
|
|
namespace detail
|
|
{
|
|
|
|
struct visitor_view_to_string
|
|
{
|
|
visitor_view_to_string(std::ostringstream & ss)
|
|
: ss_(ss) {}
|
|
|
|
template <typename T>
|
|
void operator() (T const& view)
|
|
{
|
|
for (std::size_t i=0;i<view.height();i++)
|
|
{
|
|
ss_.write(reinterpret_cast<const char*>(view.getRow(i)),
|
|
view.getRowSize());
|
|
}
|
|
}
|
|
|
|
private:
|
|
std::ostringstream & ss_;
|
|
};
|
|
|
|
} // end detail ns
|
|
|
|
|
|
MAPNIK_DECL void view_to_string (image_view_any const& view, std::ostringstream & ss)
|
|
{
|
|
util::apply_visitor(detail::visitor_view_to_string(ss), view);
|
|
}
|
|
|
|
namespace detail
|
|
{
|
|
|
|
struct visitor_create_view
|
|
{
|
|
visitor_create_view(unsigned x,unsigned y, unsigned w, unsigned h)
|
|
: x_(x), y_(y), w_(w), h_(h) {}
|
|
|
|
template <typename T>
|
|
image_view_any operator() (T const& data)
|
|
{
|
|
image_view<T> view(x_,y_,w_,h_,data);
|
|
return image_view_any(view);
|
|
}
|
|
private:
|
|
unsigned x_;
|
|
unsigned y_;
|
|
unsigned w_;
|
|
unsigned h_;
|
|
};
|
|
|
|
template <>
|
|
image_view_any visitor_create_view::operator()<image_null> (image_null const&)
|
|
{
|
|
throw std::runtime_error("Can not make a view from a null image");
|
|
}
|
|
|
|
} // end detail ns
|
|
|
|
MAPNIK_DECL image_view_any create_view(image_any const& data,unsigned x,unsigned y, unsigned w,unsigned h)
|
|
{
|
|
return util::apply_visitor(detail::visitor_create_view(x,y,w,h), data);
|
|
}
|
|
|
|
} // end ns
|