202 lines
6.2 KiB
C++
202 lines
6.2 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
|
|
*
|
|
*****************************************************************************/
|
|
//$Id$
|
|
|
|
extern "C"
|
|
{
|
|
#include <png.h>
|
|
}
|
|
|
|
// boost
|
|
#include <boost/python.hpp>
|
|
#include <boost/python/module.hpp>
|
|
#include <boost/python/def.hpp>
|
|
|
|
// mapnik
|
|
#include <mapnik/graphics.hpp>
|
|
#include <mapnik/image_util.hpp>
|
|
#include <mapnik/png_io.hpp>
|
|
#include <mapnik/image_reader.hpp>
|
|
#include <sstream>
|
|
|
|
// agg
|
|
#include "agg_rendering_buffer.h"
|
|
#include "agg_rasterizer_scanline_aa.h"
|
|
#include "agg_scanline_u.h"
|
|
#include "agg_renderer_scanline.h"
|
|
#include "agg_pixfmt_rgba.h"
|
|
|
|
// 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 namespace boost::python;
|
|
using mapnik::save_to_file;
|
|
|
|
// output 'raw' pixels
|
|
PyObject* tostring1( image_32 const& im)
|
|
{
|
|
int size = im.width() * im.height() * 4;
|
|
return ::PyString_FromStringAndSize((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 ::PyString_FromStringAndSize(s.data(),s.size());
|
|
}
|
|
|
|
void (*save_to_file1)( mapnik::image_32 const&, std::string const&,std::string const&) = mapnik::save_to_file;
|
|
void (*save_to_file2)( mapnik::image_32 const&, std::string const&) = mapnik::save_to_file;
|
|
|
|
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(new 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);
|
|
}
|
|
|
|
enum composite_mode_e
|
|
{
|
|
clear = 1,
|
|
src,
|
|
dst,
|
|
src_over,
|
|
dst_over,
|
|
src_in,
|
|
dst_in,
|
|
src_out,
|
|
dst_out,
|
|
multiply
|
|
};
|
|
|
|
void composite(image_32 & im, image_32 & im2, composite_mode_e mode)
|
|
{
|
|
typedef agg::rgba8 color;
|
|
typedef agg::order_bgra order;
|
|
typedef agg::pixel32_type pixel_type;
|
|
typedef agg::comp_op_adaptor_rgba<color, order> blender_type;
|
|
typedef agg::pixfmt_custom_blend_rgba<blender_type, agg::rendering_buffer> pixfmt_type;
|
|
typedef agg::renderer_base<pixfmt_type> renderer_type;
|
|
typedef agg::comp_op_adaptor_rgba<color, order> blender_type;
|
|
typedef agg::renderer_base<pixfmt_type> renderer_type;
|
|
|
|
|
|
agg::rendering_buffer source(im.raw_data(),im.width(),im.height(),im.width() * 4);
|
|
agg::rendering_buffer mask(im2.raw_data(),im2.width(),im2.height(),im2.width() * 4);
|
|
|
|
agg::pixfmt_custom_blend_rgba<blender_type, agg::rendering_buffer> pixf(source);
|
|
agg::pixfmt_custom_blend_rgba<blender_type, agg::rendering_buffer> pixf_mask(mask);
|
|
switch(mode)
|
|
{
|
|
case src_in:
|
|
pixf.comp_op(agg::comp_op_src_in);
|
|
break;
|
|
case dst_in:
|
|
pixf.comp_op(agg::comp_op_dst_in);
|
|
break;
|
|
case src_out:
|
|
pixf.comp_op(agg::comp_op_src_out);
|
|
break;
|
|
case dst_out:
|
|
pixf.comp_op(agg::comp_op_dst_out);
|
|
break;
|
|
case multiply:
|
|
pixf.comp_op(agg::comp_op_multiply);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
renderer_type ren(pixf);
|
|
agg::renderer_base<pixfmt_type> rb(pixf);
|
|
rb.blend_from(pixf_mask,0,0,0,255);
|
|
}
|
|
|
|
#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(new image_32(s));
|
|
return image_ptr;
|
|
}
|
|
#endif
|
|
|
|
void export_image()
|
|
{
|
|
using namespace boost::python;
|
|
enum_<composite_mode_e>("CompositeOp")
|
|
.value("src_in",src_in)
|
|
.value("dst_in",dst_in)
|
|
.value("src_out",src_out)
|
|
.value("dst_out",dst_out)
|
|
.value("multiply",multiply)
|
|
;
|
|
|
|
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)
|
|
.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("blend",&blend)
|
|
.def("composite",&composite)
|
|
.def("tostring",&tostring1)
|
|
.def("tostring",&tostring2)
|
|
.def("save", save_to_file1)
|
|
.def("save", save_to_file2)
|
|
.def("open",open_from_file)
|
|
.staticmethod("open")
|
|
#if defined(HAVE_CAIRO) && defined(HAVE_PYCAIRO)
|
|
.def("from_cairo",&from_cairo)
|
|
.staticmethod("from_cairo")
|
|
#endif
|
|
;
|
|
|
|
}
|