void operator>>(const LexicalConverter &, PixelFormat &);
PixelFormat pixelformat_from_graphics(Graphics::PixelFormat);
-PixelFormat storage_pixelformat_from_graphics(Graphics::PixelFormat);
+PixelFormat storage_pixelformat_from_graphics(Graphics::PixelFormat, bool = false);
PixelFormat get_base_pixelformat(PixelFormat);
PixelFormat get_srgb_pixelformat(PixelFormat);