1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
/*****************************************************************************
*
* 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>
}
#include <boost/python.hpp>
#include <mapnik/image_util.hpp>
#include <mapnik/image_view.hpp>
#include <mapnik/jpeg_io.hpp>
#include <mapnik/png_io.hpp>
#include <sstream>
using mapnik::ImageData32;
using mapnik::image_view;
using mapnik::save_to_file;
// output 'raw' pixels
PyObject* view_tostring1(image_view<ImageData32> const& view)
{
int size = view.width() * view.height() * 4;
return ::PyString_FromStringAndSize((const char*)view.data().getBytes(),size);
}
// encode (png,jpeg)
PyObject* view_tostring2(image_view<ImageData32> const & view, std::string const& format)
{
std::ostringstream ss(std::ios::out|std::ios::binary);
if (format == "png") save_as_png(ss,view.data());
else if (format == "png256") save_as_png256(ss,view.data());
else if (format == "jpeg") save_as_jpeg(ss,85,view.data());
else throw mapnik::ImageWriterException("unknown format: " + format);
return ::PyString_FromStringAndSize((const char*)ss.str().c_str(),ss.str().size());
}
void (*save_view1)(image_view<ImageData32> const&, std::string const&,std::string const&) = mapnik::save_to_file;
void (*save_view2)(image_view<ImageData32> const&, std::string const&) = mapnik::save_to_file;
void export_image_view()
{
using namespace boost::python;
class_<image_view<ImageData32> >("ImageView","A view into an image.",no_init)
.def("width",&image_view<ImageData32>::width)
.def("height",&image_view<ImageData32>::height)
.def("tostring",&view_tostring1)
.def("tostring",&view_tostring2)
.def("save",save_view1)
.def("save",save_view2)
;
}
|
