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/*****************************************************************************
*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2006 Artem Pavlenko, Jean-Francois Doyon
*
* 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
*
*****************************************************************************/
//$Id$
extern "C"
{
#include <png.h>
}
// boost
#include <boost/python.hpp>
#include <boost/python/module.hpp>
#include <boost/python/def.hpp>
#include <boost/make_shared.hpp>
// mapnik
#include <mapnik/graphics.hpp>
#include <mapnik/palette.hpp>
#include <mapnik/image_util.hpp>
#include <mapnik/png_io.hpp>
#include <mapnik/image_reader.hpp>
#include <mapnik/image_compositing.hpp>
// stl
#include <sstream>
// jpeg
#if defined(HAVE_JPEG)
#include <mapnik/jpeg_io.hpp>
#endif
// cairo
#if defined(HAVE_CAIRO) && defined(HAVE_PYCAIRO)
#include <cairomm/surface.h>
#include <pycairo.h>
#endif
using mapnik::image_32;
using mapnik::image_reader;
using mapnik::get_image_reader;
using mapnik::type_from_filename;
using mapnik::save_to_file;
using mapnik::save_to_string;
using namespace boost::python;
// output 'raw' pixels
PyObject* tostring1( image_32 const& im)
{
int size = im.width() * im.height() * 4;
return
#if PY_VERSION_HEX >= 0x03000000
::PyBytes_FromStringAndSize
#else
::PyString_FromStringAndSize
#endif
((const char*)im.raw_data(),size);
}
// encode (png,jpeg)
PyObject* tostring2(image_32 const & im, std::string const& format)
{
mapnik::rgba_palette pal;
std::string s = save_to_string(im, format, pal);
return
#if PY_VERSION_HEX >= 0x03000000
::PyBytes_FromStringAndSize
#else
::PyString_FromStringAndSize
#endif
(s.data(),s.size());
}
PyObject* tostring3(image_32 const & im, std::string const& format, mapnik::rgba_palette const& pal)
{
std::string s = save_to_string(im, format, pal);
return
#if PY_VERSION_HEX >= 0x03000000
::PyBytes_FromStringAndSize
#else
::PyString_FromStringAndSize
#endif
(s.data(),s.size());
}
void save_to_file1(mapnik::image_32 const& im, std::string const& filename)
{
save_to_file(im,filename);
}
void save_to_file2(mapnik::image_32 const& im, std::string const& filename, std::string const& type)
{
save_to_file(im,filename,type);
}
void save_to_file3(mapnik::image_32 const& im, std::string const& filename, std::string const& type, mapnik::rgba_palette const& pal)
{
save_to_file(im,filename,type,pal);
}
bool painted(mapnik::image_32 const& im)
{
return im.painted();
}
boost::shared_ptr<image_32> open_from_file(std::string const& filename)
{
boost::optional<std::string> type = type_from_filename(filename);
if (type)
{
std::auto_ptr<image_reader> reader(get_image_reader(filename,*type));
if (reader.get())
{
boost::shared_ptr<image_32> image_ptr = boost::make_shared<image_32>(reader->width(),reader->height());
reader->read(0,0,image_ptr->data());
return image_ptr;
}
throw mapnik::image_reader_exception("Failed to load: " + filename);
}
throw mapnik::image_reader_exception("Unsupported image format:" + filename);
}
void blend (image_32 & im, unsigned x, unsigned y, image_32 const& im2, float opacity)
{
im.set_rectangle_alpha2(im2.data(),x,y,opacity);
}
void composite(image_32 & im, image_32 & im2, mapnik::composite_mode_e mode)
{
mapnik::composite(im.data(),im2.data(),mode);
}
#if defined(HAVE_CAIRO) && defined(HAVE_PYCAIRO)
boost::shared_ptr<image_32> from_cairo(PycairoSurface* surface)
{
Cairo::RefPtr<Cairo::ImageSurface> s(new Cairo::ImageSurface(surface->surface));
boost::shared_ptr<image_32> image_ptr = boost::make_shared<image_32>(s);
return image_ptr;
}
#endif
void export_image()
{
using namespace boost::python;
enum_<mapnik::composite_mode_e>("CompositeOp")
.value("clear", mapnik::clear)
.value("src", mapnik::src)
.value("dst", mapnik::dst)
.value("src_over", mapnik::src_over)
.value("dst_over", mapnik::dst_over)
.value("src_in", mapnik::src_in)
.value("dst_in", mapnik::dst_in)
.value("src_out", mapnik::src_out)
.value("dst_out", mapnik::dst_out)
.value("src_atop", mapnik::src_atop)
.value("dst_atop", mapnik::dst_atop)
.value("xor", mapnik::_xor)
.value("plus", mapnik::plus)
.value("minus", mapnik::minus)
.value("multiply", mapnik::multiply)
.value("screen", mapnik::screen)
.value("overlay", mapnik::overlay)
.value("darken", mapnik::darken)
.value("lighten", mapnik::lighten)
.value("color_dodge", mapnik::color_dodge)
.value("color_burn", mapnik::color_burn)
.value("hard_light", mapnik::hard_light)
.value("soft_light", mapnik::soft_light)
.value("difference", mapnik::difference)
.value("exclusion", mapnik::exclusion)
.value("contrast", mapnik::contrast)
.value("invert", mapnik::invert)
.value("invert_rgb", mapnik::invert_rgb)
;
class_<image_32,boost::shared_ptr<image_32> >("Image","This class represents a 32 bit RGBA image.",init<int,int>())
.def("width",&image_32::width)
.def("height",&image_32::height)
.def("view",&image_32::get_view)
.def("painted",&painted)
.add_property("background",make_function
(&image_32::get_background,return_value_policy<copy_const_reference>()),
&image_32::set_background, "The background color of the image.")
.def("set_grayscale_to_alpha",&image_32::set_grayscale_to_alpha, "Set the grayscale values to the alpha channel of the Image")
.def("set_color_to_alpha",&image_32::set_color_to_alpha, "Set a given color to the alpha channel of the Image")
.def("set_alpha",&image_32::set_alpha, "Set the overall alpha channel of the Image")
.def("blend",&blend)
.def("composite",&composite)
//TODO(haoyu) The method name 'tostring' might be confusing since they actually return bytes in Python 3
.def("tostring",&tostring1)
.def("tostring",&tostring2)
.def("tostring",&tostring3)
.def("save", &save_to_file1)
.def("save", &save_to_file2)
.def("save", &save_to_file3)
.def("open",open_from_file)
.staticmethod("open")
#if defined(HAVE_CAIRO) && defined(HAVE_PYCAIRO)
.def("from_cairo",&from_cairo)
.staticmethod("from_cairo")
#endif
;
}
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