func (m *Map) RenderToFile(path string) error {
cs := C.CString(path)
defer C.free(unsafe.Pointer(cs))
if C.mapnik_map_render_to_file(m.m, cs) != 0 {
return m.lastError()
}
return nil
}
// RenderToFile writes the map as an encoded image to the file system.
func (m *Map) RenderToFile(opts RenderOpts, path string) error {
scaleFactor := opts.ScaleFactor
if scaleFactor == 0.0 {
scaleFactor = 1.0
}
cs := C.CString(path)
defer C.free(unsafe.Pointer(cs))
var format *C.char
if opts.Format != "" {
format = C.CString(opts.Format)
} else {
format = C.CString("png256")
}
defer C.free(unsafe.Pointer(format))
if C.mapnik_map_render_to_file(m.m, cs, C.double(opts.Scale), C.double(scaleFactor), format) != 0 {
return m.lastError()
}
return nil
}