pkg image, const YCbCrSubsampleRatio444 = 0
pkg image/draw, const Over = 0
pkg image/draw, const Src = 1
pkg image/jpeg, const DefaultQuality = 75
pkg io, type ByteWriter interface { WriteByte }
pkg io, type ByteWriter interface, WriteByte(uint8) error
pkg io, var ErrNoProgress error
pkg log, const Ldate = 1
pkg log, const Llongfile = 8
pkg log, const Lmicroseconds = 4
pkg log, const Lshortfile = 16