228 lines
7.3 KiB
C++
228 lines
7.3 KiB
C++
/*****************************************************************************
|
|
*
|
|
* 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
|
|
*
|
|
*****************************************************************************/
|
|
|
|
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>
|
|
|
|
// 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)
|
|
{
|
|
std::string s = save_to_string(im, format);
|
|
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();
|
|
}
|
|
|
|
void set_pixel(mapnik::image_32 & im, unsigned x, unsigned y, mapnik::color const& c)
|
|
{
|
|
im.setPixel(x, y, c.rgba());
|
|
}
|
|
|
|
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, float opacity)
|
|
{
|
|
mapnik::composite(im.data(),im2.data(),mode,opacity,true,true);
|
|
}
|
|
|
|
#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)
|
|
.def("set_pixel",&set_pixel)
|
|
//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
|
|
;
|
|
|
|
}
|