func SizeofImage(m image.Image) int {
if m, ok := m.(SizeofImager); ok {
return m.SizeofImage()
}
if m, ok := AsMemPImage(m); ok {
return int(unsafe.Sizeof(*m)) + len(m.XPix)
}
b := m.Bounds()
switch m := m.(type) {
case *image.Alpha:
return int(unsafe.Sizeof(*m)) + b.Dx()*b.Dy()*1
case *image.Alpha16:
return int(unsafe.Sizeof(*m)) + b.Dx()*b.Dy()*2
case *image.Gray:
return int(unsafe.Sizeof(*m)) + b.Dx()*b.Dy()*1
case *image.Gray16:
return int(unsafe.Sizeof(*m)) + b.Dx()*b.Dy()*2
case *image.NRGBA:
return int(unsafe.Sizeof(*m)) + b.Dx()*b.Dy()*4
case *image.NRGBA64:
return int(unsafe.Sizeof(*m)) + b.Dx()*b.Dy()*8
case *image.RGBA:
return int(unsafe.Sizeof(*m)) + b.Dx()*b.Dy()*4
case *image.RGBA64:
return int(unsafe.Sizeof(*m)) + b.Dx()*b.Dy()*8
case *image.Uniform:
return int(unsafe.Sizeof(*m))
case *image.YCbCr:
return int(unsafe.Sizeof(*m)) + len(m.Y) + len(m.Cb) + len(m.Cr)
}
// return same as RGBA64 size
return int(unsafe.Sizeof((*image.RGBA64)(nil))) + b.Dx()*b.Dy()*8
}