270 lines
9.4 KiB
C++
270 lines
9.4 KiB
C++
/*****************************************************************************
|
|
*
|
|
* This file is part of Mapnik (c++ mapping toolkit)
|
|
*
|
|
* Copyright (C) 2006 Artem Pavlenko
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
*****************************************************************************/
|
|
|
|
//$Id: image_util.cpp 36 2005-04-05 14:32:18Z pavlenko $
|
|
|
|
extern "C"
|
|
{
|
|
#include <png.h>
|
|
}
|
|
|
|
// mapnik
|
|
#include <mapnik/image_util.hpp>
|
|
#include <mapnik/png_io.hpp>
|
|
#include <mapnik/graphics.hpp>
|
|
#include <mapnik/memory.hpp>
|
|
#include <mapnik/image_view.hpp>
|
|
#include <mapnik/map.hpp>
|
|
|
|
// jpeg
|
|
#if defined(HAVE_JPEG)
|
|
#include <mapnik/jpeg_io.hpp>
|
|
#endif
|
|
|
|
#ifdef HAVE_CAIRO
|
|
#include <mapnik/cairo_renderer.hpp>
|
|
#endif
|
|
|
|
#include <boost/foreach.hpp>
|
|
#include <boost/tokenizer.hpp>
|
|
|
|
// stl
|
|
#include <string>
|
|
#include <iostream>
|
|
#include <fstream>
|
|
#include <sstream>
|
|
|
|
namespace mapnik
|
|
{
|
|
template <typename T>
|
|
std::string save_to_string(T const& image,
|
|
std::string const& type)
|
|
{
|
|
std::ostringstream ss(std::ios::out|std::ios::binary);
|
|
save_to_stream(image, ss, type);
|
|
return ss.str();
|
|
}
|
|
|
|
template <typename T>
|
|
void save_to_file(T const& image,
|
|
std::string const& filename,
|
|
std::string const& type)
|
|
{
|
|
std::ofstream file (filename.c_str(), std::ios::out| std::ios::trunc|std::ios::binary);
|
|
if (file)
|
|
{
|
|
save_to_stream(image, file, type);
|
|
}
|
|
else throw ImageWriterException("Could not write file to " + filename );
|
|
}
|
|
|
|
template <typename T>
|
|
void save_to_stream(T const& image,
|
|
std::ostream & stream,
|
|
std::string const& type)
|
|
{
|
|
if (stream)
|
|
{
|
|
//all this should go into image_writer factory
|
|
if (type == "png") save_as_png(stream, image);
|
|
else if (boost::algorithm::istarts_with(type, std::string("png256")) ||
|
|
boost::algorithm::istarts_with(type, std::string("png8"))
|
|
)
|
|
{
|
|
int colors = 256;
|
|
int trans_mode = -1;
|
|
double gamma = -1;
|
|
bool use_octree = true;
|
|
if (type.length() > 6){
|
|
boost::char_separator<char> sep(":");
|
|
boost::tokenizer< boost::char_separator<char> > tokens(type, sep);
|
|
BOOST_FOREACH(string t, tokens)
|
|
{
|
|
if (t == "m=h")
|
|
{
|
|
use_octree = false;
|
|
}
|
|
if (t == "m=o")
|
|
{
|
|
use_octree = true;
|
|
}
|
|
if (boost::algorithm::istarts_with(t,std::string("c=")))
|
|
{
|
|
try
|
|
{
|
|
colors = boost::lexical_cast<int>(t.substr(2));
|
|
if (colors < 0 || colors > 256)
|
|
throw ImageWriterException("invalid color parameter: " + t.substr(2) + " out of bounds");
|
|
}
|
|
catch(boost::bad_lexical_cast &)
|
|
{
|
|
throw ImageWriterException("invalid color parameter: " + t.substr(2));
|
|
}
|
|
}
|
|
if (boost::algorithm::istarts_with(t, std::string("t=")))
|
|
{
|
|
try
|
|
{
|
|
trans_mode= boost::lexical_cast<int>(t.substr(2));
|
|
if (trans_mode < 0 || trans_mode > 2)
|
|
throw ImageWriterException("invalid trans_mode parameter: " + t.substr(2) + " out of bounds");
|
|
}
|
|
catch(boost::bad_lexical_cast &)
|
|
{
|
|
throw ImageWriterException("invalid trans_mode parameter: " + t.substr(2));
|
|
}
|
|
}
|
|
if (boost::algorithm::istarts_with(t, std::string("g=")))
|
|
{
|
|
try
|
|
{
|
|
gamma= boost::lexical_cast<double>(t.substr(2));
|
|
if (gamma < 0)
|
|
throw ImageWriterException("invalid gamma parameter: " + t.substr(2) + " out of bounds");
|
|
}
|
|
catch(boost::bad_lexical_cast &)
|
|
{
|
|
throw ImageWriterException("invalid gamma parameter: " + t.substr(2));
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
if (use_octree)
|
|
save_as_png256(stream, image, colors);
|
|
else
|
|
save_as_png256_hex(stream, image, colors, trans_mode, gamma);
|
|
}
|
|
#if defined(HAVE_JPEG)
|
|
else if (boost::algorithm::istarts_with(type,std::string("jpeg")))
|
|
{
|
|
int quality = 85;
|
|
try
|
|
{
|
|
if(type.substr(4).length() != 0)
|
|
{
|
|
quality = boost::lexical_cast<int>(type.substr(4));
|
|
if(quality<0 || quality>100)
|
|
throw ImageWriterException("invalid jpeg quality: " + type.substr(4) + " out of bounds");
|
|
}
|
|
save_as_jpeg(stream, quality, image);
|
|
}
|
|
catch(boost::bad_lexical_cast &)
|
|
{
|
|
throw ImageWriterException("invalid jpeg quality: " + type.substr(4) + " not a number");
|
|
}
|
|
}
|
|
#endif
|
|
else throw ImageWriterException("unknown file type: " + type);
|
|
}
|
|
else throw ImageWriterException("Could not write to empty stream" );
|
|
}
|
|
|
|
|
|
template <typename T>
|
|
void save_to_file(T const& image,std::string const& filename)
|
|
{
|
|
boost::optional<std::string> type = type_from_filename(filename);
|
|
if (type)
|
|
{
|
|
save_to_file<T>(image,filename,*type);
|
|
}
|
|
}
|
|
|
|
#if defined(HAVE_CAIRO)
|
|
// TODO - move to separate cairo_io.hpp
|
|
void save_to_cairo_file(mapnik::Map const& map, std::string const& filename)
|
|
{
|
|
boost::optional<std::string> type = type_from_filename(filename);
|
|
if (type)
|
|
{
|
|
save_to_cairo_file(map,filename,*type);
|
|
}
|
|
}
|
|
|
|
void save_to_cairo_file(mapnik::Map const& map,
|
|
std::string const& filename,
|
|
std::string const& type)
|
|
{
|
|
std::ofstream file (filename.c_str(), std::ios::out|std::ios::trunc|std::ios::binary);
|
|
if (file)
|
|
{
|
|
Cairo::RefPtr<Cairo::Surface> surface;
|
|
unsigned width = map.getWidth();
|
|
unsigned height = map.getHeight();
|
|
if (type == "pdf")
|
|
surface = Cairo::PdfSurface::create(filename,width,height);
|
|
else if (type == "svg")
|
|
surface = Cairo::SvgSurface::create(filename,width,height);
|
|
else if (type == "ps")
|
|
surface = Cairo::PsSurface::create(filename,width,height);
|
|
else if (type == "ARGB32")
|
|
surface = Cairo::ImageSurface::create(Cairo::FORMAT_ARGB32,width,height);
|
|
else if (type == "RGB24")
|
|
surface = Cairo::ImageSurface::create(Cairo::FORMAT_RGB24,width,height);
|
|
else
|
|
throw ImageWriterException("unknown file type: " + type);
|
|
Cairo::RefPtr<Cairo::Context> context = Cairo::Context::create(surface);
|
|
|
|
// TODO - expose as user option
|
|
/*
|
|
if (type == "ARGB32" || type == "RGB24")
|
|
{
|
|
context->set_antialias(Cairo::ANTIALIAS_NONE);
|
|
}
|
|
*/
|
|
|
|
|
|
mapnik::cairo_renderer<Cairo::Context> ren(map, context);
|
|
ren.apply();
|
|
|
|
if (type == "ARGB32" || type == "RGB24")
|
|
{
|
|
surface->write_to_png(filename);
|
|
}
|
|
surface->finish();
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
template void save_to_file<image_data_32>(image_data_32 const&,
|
|
std::string const&,
|
|
std::string const&);
|
|
|
|
template void save_to_file<image_data_32>(image_data_32 const&,
|
|
std::string const&);
|
|
|
|
template std::string save_to_string<image_data_32>(image_data_32 const&,
|
|
std::string const&);
|
|
|
|
template void save_to_file<image_view<image_data_32> > (image_view<image_data_32> const&,
|
|
std::string const&,
|
|
std::string const&);
|
|
|
|
template void save_to_file<image_view<image_data_32> > (image_view<image_data_32> const&,
|
|
std::string const&);
|
|
|
|
template std::string save_to_string<image_view<image_data_32> > (image_view<image_data_32> const&,
|
|
std::string const&);
|
|
|
|
}
|