from Bitmap.hpp:81
struct BitmapData
{
const uint8_t* const data;
const uint8_t* const alphaData;
const uint16_t width;
const uint16_t height;
const uint16_t solidRect_x;
const uint16_t solidRect_y;
const uint16_t solidRect_width;
const uint16_t solidRect_height : 13;
const uint8_t format : 3;
};