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add ability to pass the scale_factor to render_to_file

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This commit is contained in:
Dane Springmeyer 2010-06-29 21:35:49 +00:00
parent 4fbcb989c1
commit 15896b8ba9
1 changed files with 35 additions and 0 deletions
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35
bindings/python/mapnik_python.cpp
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@ -218,6 +218,29 @@ void render_to_file2(const mapnik::Map& map,const std::string& filename)
}
}
void render_to_file3(const mapnik::Map& map,
const std::string& filename,
const std::string& format,
double scale_factor = 1.0
)
{
if (format == "pdf" || format == "svg" || format =="ps" || format == "ARGB32" || format == "RGB24")
{
#if defined(HAVE_CAIRO)
mapnik::save_to_cairo_file(map,filename,format);
#else
throw mapnik::ImageWriterException("Cairo backend not available, cannot write to format: " + format);
#endif
}
else
{
mapnik::image_32 image(map.width(),map.height());
render(map,image,scale_factor,0,0);
mapnik::save_to_file(image,filename,format);
}
}
double scale_denominator(mapnik::Map const &map, bool geographic)
{
return mapnik::scale_denominator(map, geographic);
@ -363,6 +386,18 @@ BOOST_PYTHON_MODULE(_mapnik2)
"\n"
);
def("render_to_file",&render_to_file3,
"\n"
"Render Map to file using explicit image type and scale factor.\n"
"\n"
"Usage:\n"
">>> from mapnik import Map, render_to_file, load_map\n"
">>> m = Map(256,256)\n"
">>> scale_factor = 4\n"
">>> render_to_file(m,'image.jpeg',scale_factor)\n"
"\n"
);
def("render_tile_to_file",&render_tile_to_file,
"\n"
"TODO\n"