660 lines
24 KiB
C++
660 lines
24 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) 2006 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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//$Id: image_util.cpp 36 2005-04-05 14:32:18Z pavlenko $
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extern "C"
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{
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#include <png.h>
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}
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// mapnik
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#include <mapnik/image_util.hpp>
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#include <mapnik/png_io.hpp>
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#include <mapnik/graphics.hpp>
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#include <mapnik/memory.hpp>
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#include <mapnik/image_view.hpp>
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#include <mapnik/palette.hpp>
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#include <mapnik/map.hpp>
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// boost
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#include <boost/lexical_cast.hpp>
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// jpeg
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#if defined(HAVE_JPEG)
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#include <mapnik/jpeg_io.hpp>
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#endif
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#ifdef HAVE_CAIRO
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#include <mapnik/cairo_renderer.hpp>
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#endif
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#include <boost/foreach.hpp>
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#include <boost/tokenizer.hpp>
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// stl
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#include <string>
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#include <iostream>
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#include <fstream>
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#include <sstream>
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// agg
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//#include "agg_conv_transform.h"
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#include "agg_image_accessors.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_renderer_scanline.h"
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#include "agg_rendering_buffer.h"
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#include "agg_scanline_u.h"
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//#include "agg_scanline_p.h"
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#include "agg_span_allocator.h"
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#include "agg_span_image_filter_rgba.h"
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#include "agg_span_interpolator_linear.h"
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#include "agg_trans_affine.h"
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#include "agg_image_filters.h"
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namespace mapnik
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{
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template <typename T>
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std::string save_to_string(T const& image,
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std::string const& type,
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rgba_palette& 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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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& 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(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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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& palette)
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{
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if (stream)
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{
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//all this should go into image_writer factory
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if (type == "png" || boost::algorithm::istarts_with(type, std::string("png")))
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{
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int colors = 256;
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int compression = Z_DEFAULT_COMPRESSION;
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int strategy = Z_DEFAULT_STRATEGY;
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int trans_mode = -1;
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double gamma = -1;
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bool use_octree = true;
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if (type == "png" || type == "png24" || type == "png32")
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{
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// Shortcut when the user didn't specify any flags after the colon.
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// Paletted images specify "png8 or png256".
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colors = -1;
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}
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if (type.length() > 6){
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boost::char_separator<char> sep(":");
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boost::tokenizer< boost::char_separator<char> > tokens(type, sep);
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BOOST_FOREACH(std::string t, tokens)
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{
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if (t == "png" || t == "png24" || t == "png32")
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{
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colors = -1;
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}
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else if (t == "m=h")
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{
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use_octree = false;
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}
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else if (t == "m=o")
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{
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use_octree = true;
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}
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else if (boost::algorithm::istarts_with(t,std::string("c=")))
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{
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try
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{
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if (colors < 0)
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throw ImageWriterException("invalid color parameter: unavailable for true color images");
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colors = boost::lexical_cast<int>(t.substr(2));
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if (colors < 0 || colors > 256)
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throw ImageWriterException("invalid color parameter: " + t.substr(2) + " out of bounds");
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}
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catch(boost::bad_lexical_cast &)
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{
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throw ImageWriterException("invalid color parameter: " + t.substr(2));
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}
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}
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else if (boost::algorithm::istarts_with(t, std::string("t=")))
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{
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try
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{
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if (colors < 0)
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throw ImageWriterException("invalid trans_mode parameter: unavailable for true color images");
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trans_mode = boost::lexical_cast<int>(t.substr(2));
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if (trans_mode < 0 || trans_mode > 2)
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throw ImageWriterException("invalid trans_mode parameter: " + t.substr(2) + " out of bounds");
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}
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catch(boost::bad_lexical_cast &)
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{
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throw ImageWriterException("invalid trans_mode parameter: " + t.substr(2));
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}
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}
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else if (boost::algorithm::istarts_with(t, std::string("g=")))
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{
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try
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{
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if (colors < 0)
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throw ImageWriterException("invalid gamma parameter: unavailable for true color images");
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gamma = boost::lexical_cast<double>(t.substr(2));
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if (gamma < 0)
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throw ImageWriterException("invalid gamma parameter: " + t.substr(2) + " out of bounds");
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}
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catch(boost::bad_lexical_cast &)
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{
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throw ImageWriterException("invalid gamma parameter: " + t.substr(2));
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}
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}
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else if (boost::algorithm::istarts_with(t,std::string("z=")))
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{
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try
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{
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compression = boost::lexical_cast<int>(t.substr(2));
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/*
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#define Z_NO_COMPRESSION 0
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#define Z_BEST_SPEED 1
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#define Z_BEST_COMPRESSION 9
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#define Z_DEFAULT_COMPRESSION (-1)
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*/
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if (compression < Z_DEFAULT_COMPRESSION || compression > Z_BEST_COMPRESSION)
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throw ImageWriterException("invalid compression parameter: " + t.substr(2) + " out of bounds (only -1 through 9 are valid)");
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}
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catch(boost::bad_lexical_cast &)
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{
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throw ImageWriterException("invalid compression parameter: " + t.substr(2));
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}
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}
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else if (boost::algorithm::istarts_with(t,std::string("s=")))
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{
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try
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{
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std::string s = boost::lexical_cast<std::string>(t.substr(2));
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if (s == "default") strategy = Z_DEFAULT_STRATEGY;
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else if (s == "filtered") strategy = Z_FILTERED;
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else if (s == "huff") strategy = Z_HUFFMAN_ONLY;
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else if (s == "rle") strategy = Z_RLE;
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else
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throw ImageWriterException("invalid compression strategy parameter: " + s);
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}
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catch(boost::bad_lexical_cast &)
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{
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throw ImageWriterException("invalid compression strategy parameter: " + t.substr(2));
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}
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}
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}
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}
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if (&palette != NULL && palette.valid())
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save_as_png8_pal(stream, image, palette, compression, strategy);
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else if (colors < 0)
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save_as_png(stream, image, compression, strategy);
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else if (use_octree)
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save_as_png8_oct(stream, image, colors, compression, strategy);
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else
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save_as_png8_hex(stream, image, colors, compression, strategy, trans_mode, gamma);
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}
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#if defined(HAVE_JPEG)
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else if (boost::algorithm::istarts_with(type,std::string("jpeg")))
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{
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int quality = 85;
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try
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{
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if(type.substr(4).length() != 0)
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{
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quality = boost::lexical_cast<int>(type.substr(4));
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if(quality<0 || quality>100)
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throw ImageWriterException("invalid jpeg quality: " + type.substr(4) + " out of bounds");
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}
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save_as_jpeg(stream, quality, image);
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}
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catch(boost::bad_lexical_cast &)
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{
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throw ImageWriterException("invalid jpeg quality: " + type.substr(4) + " not a number");
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}
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}
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#endif
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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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void save_to_file(T const& image,std::string const& filename, rgba_palette& 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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}
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#if defined(HAVE_CAIRO)
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// TODO - move to separate cairo_io.hpp
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void save_to_cairo_file(mapnik::Map const& map, 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_cairo_file(map,filename,*type);
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}
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}
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void save_to_cairo_file(mapnik::Map const& map,
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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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Cairo::RefPtr<Cairo::Surface> surface;
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unsigned width = map.width();
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unsigned height = map.height();
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if (type == "pdf")
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surface = Cairo::PdfSurface::create(filename,width,height);
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else if (type == "svg")
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surface = Cairo::SvgSurface::create(filename,width,height);
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else if (type == "ps")
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surface = Cairo::PsSurface::create(filename,width,height);
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else if (type == "ARGB32")
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surface = Cairo::ImageSurface::create(Cairo::FORMAT_ARGB32,width,height);
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else if (type == "RGB24")
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surface = Cairo::ImageSurface::create(Cairo::FORMAT_RGB24,width,height);
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else
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throw ImageWriterException("unknown file type: " + type);
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Cairo::RefPtr<Cairo::Context> context = Cairo::Context::create(surface);
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// TODO - expose as user option
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/*
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if (type == "ARGB32" || type == "RGB24")
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{
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context->set_antialias(Cairo::ANTIALIAS_NONE);
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}
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*/
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mapnik::cairo_renderer<Cairo::Context> ren(map, context);
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ren.apply();
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if (type == "ARGB32" || type == "RGB24")
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{
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surface->write_to_png(filename);
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}
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surface->finish();
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}
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}
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#endif
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template void save_to_file<image_data_32>(image_data_32 const&,
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std::string const&,
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std::string const&,
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rgba_palette& palette);
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template void save_to_file<image_data_32>(image_data_32 const&,
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std::string const&,
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rgba_palette& palette);
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template std::string save_to_string<image_data_32>(image_data_32 const&,
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std::string const&,
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rgba_palette& palette);
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template void save_to_file<image_view<image_data_32> > (image_view<image_data_32> const&,
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std::string const&,
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std::string const&,
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rgba_palette& palette);
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template void save_to_file<image_view<image_data_32> > (image_view<image_data_32> const&,
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std::string const&,
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rgba_palette& palette);
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template std::string save_to_string<image_view<image_data_32> > (image_view<image_data_32> const&,
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std::string const&,
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rgba_palette& palette);
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// Image scaling functions
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scaling_method_e get_scaling_method_by_name (std::string name)
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{
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// TODO - make into proper ENUMS
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if (name == "fast" || name == "near")
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return SCALING_NEAR;
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else if (name == "bilinear")
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return SCALING_BILINEAR;
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else if (name == "cubic" || name == "bicubic")
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return SCALING_BICUBIC;
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else if (name == "spline16")
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return SCALING_SPLINE16;
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else if (name == "spline36")
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return SCALING_SPLINE36;
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else if (name == "hanning")
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return SCALING_HANNING;
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else if (name == "hamming")
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return SCALING_HAMMING;
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else if (name == "hermite")
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return SCALING_HERMITE;
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else if (name == "kaiser")
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return SCALING_KAISER;
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else if (name == "quadric")
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return SCALING_QUADRIC;
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else if (name == "catrom")
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return SCALING_CATROM;
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else if (name == "gaussian")
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return SCALING_GAUSSIAN;
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else if (name == "bessel")
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return SCALING_BESSEL;
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else if (name == "mitchell")
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return SCALING_MITCHELL;
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else if (name == "sinc")
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return SCALING_SINC;
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else if (name == "lanczos")
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return SCALING_LANCZOS;
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else if (name == "blackman")
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return SCALING_BLACKMAN;
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else
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return SCALING_NEAR;
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}
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// this has been replaced by agg impl - see https://trac.mapnik.org/ticket/656
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template <typename Image>
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void scale_image_bilinear_old (Image& target,const Image& source, double x_off_f, double y_off_f)
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{
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int source_width=source.width();
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int source_height=source.height();
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int target_width=target.width();
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int target_height=target.height();
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if (source_width<1 || source_height<1 ||
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target_width<1 || target_height<1) return;
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int x=0,y=0,xs=0,ys=0;
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int tw2 = target_width/2;
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int th2 = target_height/2;
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int offs_x = rint((source_width-target_width-x_off_f*2*source_width)/2);
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int offs_y = rint((source_height-target_height-y_off_f*2*source_height)/2);
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unsigned yprt, yprt1, xprt, xprt1;
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//no scaling or subpixel offset
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if (target_height == source_height && target_width == source_width && offs_x == 0 && offs_y == 0){
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for (y=0;y<target_height;++y)
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target.setRow(y,source.getRow(y),target_width);
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return;
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}
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for (y=0;y<target_height;++y)
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{
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ys = (y*source_height+offs_y)/target_height;
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int ys1 = ys+1;
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if (ys1>=source_height)
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ys1--;
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if (ys<0)
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ys=ys1=0;
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if (source_height/2<target_height)
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yprt = (y*source_height+offs_y)%target_height;
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else
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yprt = th2;
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yprt1 = target_height-yprt;
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for (x=0;x<target_width;++x)
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{
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xs = (x*source_width+offs_x)/target_width;
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if (source_width/2<target_width)
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xprt = (x*source_width+offs_x)%target_width;
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else
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xprt = tw2;
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xprt1 = target_width-xprt;
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int xs1 = xs+1;
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if (xs1>=source_width)
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xs1--;
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if (xs<0)
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xs=xs1=0;
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unsigned a = source(xs,ys);
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unsigned b = source(xs1,ys);
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unsigned c = source(xs,ys1);
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unsigned d = source(xs1,ys1);
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unsigned out=0;
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unsigned t = 0;
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for(int i=0; i<4; i++){
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unsigned p,r,s;
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// X axis
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p = a&0xff;
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r = b&0xff;
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if (p!=r)
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r = (r*xprt+p*xprt1+tw2)/target_width;
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p = c&0xff;
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s = d&0xff;
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if (p!=s)
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s = (s*xprt+p*xprt1+tw2)/target_width;
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// Y axis
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if (r!=s)
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r = (s*yprt+r*yprt1+th2)/target_height;
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// channel up
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out |= r << t;
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t += 8;
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a >>= 8;
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b >>= 8;
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c >>= 8;
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d >>= 8;
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}
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target(x,y)=out;
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}
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}
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}
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template <typename Image>
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void scale_image_bilinear8 (Image& target,const Image& source, double x_off_f, double y_off_f)
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{
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int source_width=source.width();
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int source_height=source.height();
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int target_width=target.width();
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int target_height=target.height();
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if (source_width<1 || source_height<1 ||
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target_width<1 || target_height<1) return;
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int x=0,y=0,xs=0,ys=0;
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int tw2 = target_width/2;
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int th2 = target_height/2;
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int offs_x = rint((source_width-target_width-x_off_f*2*source_width)/2);
|
|
int offs_y = rint((source_height-target_height-y_off_f*2*source_height)/2);
|
|
unsigned yprt, yprt1, xprt, xprt1;
|
|
|
|
//no scaling or subpixel offset
|
|
if (target_height == source_height && target_width == source_width && offs_x == 0 && offs_y == 0){
|
|
for (y=0;y<target_height;++y)
|
|
target.setRow(y,source.getRow(y),target_width);
|
|
return;
|
|
}
|
|
|
|
for (y=0;y<target_height;++y)
|
|
{
|
|
ys = (y*source_height+offs_y)/target_height;
|
|
int ys1 = ys+1;
|
|
if (ys1>=source_height)
|
|
ys1--;
|
|
if (ys<0)
|
|
ys=ys1=0;
|
|
if (source_height/2<target_height)
|
|
yprt = (y*source_height+offs_y)%target_height;
|
|
else
|
|
yprt = th2;
|
|
yprt1 = target_height-yprt;
|
|
for (x=0;x<target_width;++x)
|
|
{
|
|
xs = (x*source_width+offs_x)/target_width;
|
|
if (source_width/2<target_width)
|
|
xprt = (x*source_width+offs_x)%target_width;
|
|
else
|
|
xprt = tw2;
|
|
xprt1 = target_width-xprt;
|
|
int xs1 = xs+1;
|
|
if (xs1>=source_width)
|
|
xs1--;
|
|
if (xs<0)
|
|
xs=xs1=0;
|
|
|
|
unsigned a = source(xs,ys);
|
|
unsigned b = source(xs1,ys);
|
|
unsigned c = source(xs,ys1);
|
|
unsigned d = source(xs1,ys1);
|
|
unsigned p,r,s;
|
|
// X axis
|
|
p = a&0xff;
|
|
r = b&0xff;
|
|
if (p!=r)
|
|
r = (r*xprt+p*xprt1+tw2)/target_width;
|
|
p = c&0xff;
|
|
s = d&0xff;
|
|
if (p!=s)
|
|
s = (s*xprt+p*xprt1+tw2)/target_width;
|
|
// Y axis
|
|
if (r!=s)
|
|
r = (s*yprt+r*yprt1+th2)/target_height;
|
|
target(x,y)=(0xff<<24) | (r<<16) | (r<<8) | r;
|
|
}
|
|
}
|
|
}
|
|
|
|
template <typename Image>
|
|
void scale_image_agg (Image& target,const Image& source, scaling_method_e scaling_method, double scale_factor, double x_off_f, double y_off_f, double filter_radius, double ratio)
|
|
{
|
|
typedef agg::pixfmt_rgba32_plain pixfmt;
|
|
typedef agg::renderer_base<pixfmt> renderer_base;
|
|
|
|
// define some stuff we'll use soon
|
|
agg::rasterizer_scanline_aa<> ras;
|
|
agg::scanline_u8 sl;
|
|
agg::span_allocator<agg::rgba8> sa;
|
|
agg::image_filter_lut filter;
|
|
|
|
// initialize source AGG buffer
|
|
agg::rendering_buffer rbuf_src((unsigned char*)source.getBytes(), source.width(), source.height(), source.width() * 4);
|
|
pixfmt pixf_src(rbuf_src);
|
|
|
|
typedef agg::image_accessor_clone<pixfmt> img_src_type;
|
|
img_src_type img_src(pixf_src);
|
|
|
|
// initialise destination AGG buffer (with transparency)
|
|
agg::rendering_buffer rbuf_dst((unsigned char*)target.getBytes(), target.width(), target.height(), target.width() * 4);
|
|
pixfmt pixf_dst(rbuf_dst);
|
|
renderer_base rb_dst(pixf_dst);
|
|
rb_dst.clear(agg::rgba(0, 0, 0, 0));
|
|
|
|
// create a scaling matrix
|
|
agg::trans_affine img_mtx;
|
|
img_mtx /= agg::trans_affine_scaling(scale_factor * ratio, scale_factor * ratio);
|
|
|
|
// create a linear interpolator for our scaling matrix
|
|
typedef agg::span_interpolator_linear<> interpolator_type;
|
|
interpolator_type interpolator(img_mtx);
|
|
|
|
// draw an anticlockwise polygon to render our image into
|
|
double scaled_width = source.width() * scale_factor;
|
|
double scaled_height = source.height() * scale_factor;
|
|
ras.reset();
|
|
ras.move_to_d(x_off_f, y_off_f);
|
|
ras.line_to_d(x_off_f + scaled_width, y_off_f);
|
|
ras.line_to_d(x_off_f + scaled_width, y_off_f + scaled_height);
|
|
ras.line_to_d(x_off_f, y_off_f + scaled_height);
|
|
|
|
switch(scaling_method)
|
|
{
|
|
case SCALING_NEAR:
|
|
{
|
|
typedef agg::span_image_filter_rgba_nn<img_src_type, interpolator_type> span_gen_type;
|
|
span_gen_type sg(img_src, interpolator);
|
|
agg::render_scanlines_aa(ras, sl, rb_dst, sa, sg);
|
|
return;
|
|
}
|
|
case SCALING_BILINEAR:
|
|
filter.calculate(agg::image_filter_bilinear(), true); break;
|
|
case SCALING_BICUBIC:
|
|
filter.calculate(agg::image_filter_bicubic(), true); break;
|
|
case SCALING_SPLINE16:
|
|
filter.calculate(agg::image_filter_spline16(), true); break;
|
|
case SCALING_SPLINE36:
|
|
filter.calculate(agg::image_filter_spline36(), true); break;
|
|
case SCALING_HANNING:
|
|
filter.calculate(agg::image_filter_hanning(), true); break;
|
|
case SCALING_HAMMING:
|
|
filter.calculate(agg::image_filter_hamming(), true); break;
|
|
case SCALING_HERMITE:
|
|
filter.calculate(agg::image_filter_hermite(), true); break;
|
|
case SCALING_KAISER:
|
|
filter.calculate(agg::image_filter_kaiser(), true); break;
|
|
case SCALING_QUADRIC:
|
|
filter.calculate(agg::image_filter_quadric(), true); break;
|
|
case SCALING_CATROM:
|
|
filter.calculate(agg::image_filter_catrom(), true); break;
|
|
case SCALING_GAUSSIAN:
|
|
filter.calculate(agg::image_filter_gaussian(), true); break;
|
|
case SCALING_BESSEL:
|
|
filter.calculate(agg::image_filter_bessel(), true); break;
|
|
case SCALING_MITCHELL:
|
|
filter.calculate(agg::image_filter_mitchell(), true); break;
|
|
case SCALING_SINC:
|
|
filter.calculate(agg::image_filter_sinc(filter_radius), true); break;
|
|
case SCALING_LANCZOS:
|
|
filter.calculate(agg::image_filter_lanczos(filter_radius), true); break;
|
|
case SCALING_BLACKMAN:
|
|
filter.calculate(agg::image_filter_blackman(filter_radius), true); break;
|
|
}
|
|
typedef agg::span_image_resample_rgba_affine<img_src_type> span_gen_type;
|
|
span_gen_type sg(img_src, interpolator, filter);
|
|
agg::render_scanlines_aa(ras, sl, rb_dst, sa, sg);
|
|
}
|
|
|
|
template void scale_image_agg<image_data_32> (image_data_32& target,const image_data_32& source, scaling_method_e scaling_method, double scale_factor, double x_off_f, double y_off_f, double filter_radius, double ratio);
|
|
|
|
template void scale_image_bilinear_old<image_data_32> (image_data_32& target,const image_data_32& source, double x_off_f, double y_off_f);
|
|
|
|
template void scale_image_bilinear8<image_data_32> (image_data_32& target,const image_data_32& source, double x_off_f, double y_off_f);
|
|
|
|
}
|