kCGBitmapByteOrder32Little 是什么意思

Question

CGBitmapInfo常量的含义是什么？

typedef CF_OPTIONS(uint32_t, CGBitmapInfo) {
  kCGBitmapAlphaInfoMask = 0x1F,
  kCGBitmapFloatInfoMask = 0xF00,
  kCGBitmapFloatComponents = (1 << 8),
  kCGBitmapByteOrderDefault = (0 << 12),
  kCGBitmapByteOrder16Little = (1 << 12),
  kCGBitmapByteOrder32Little = (2 << 12),
  kCGBitmapByteOrder32Big = (4 << 12)
}

Answer 1

您可以在 Core Graphic 文档中找到常量的描述：https://developer.apple.com/reference/coregraphics/cgbitmapinfo