void operator>>(const LexicalConverter &, PixelFormat &);
PixelFormat pixelformat_from_graphics(Graphics::PixelFormat);
+PixelFormat storage_pixelformat_from_graphics(Graphics::PixelFormat);
PixelFormat get_base_pixelformat(PixelFormat);
+unsigned get_component_count(PixelFormat);
void require_pixelformat(PixelFormat);