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Quartz Bitmap Data

The Quartz constants shown in Table 4-1 specify the byte ordering of pixel formats. These constants, which are defined in the CGImage.h header file, are used in the bitmapInfo parameter. To specify byte ordering to Quartz, use a bitwise OR operator to combine the appropriate constant with the bitmapInfo parameter.

Table 4-1  Quartz constants that specify byte ordering

Constant

Specifies

kCGBitmapByteOrderMask

The byte order mask

kCGBitmapByteOrder16Big

16-bit, big-endian format

kCGBitmapByteOrder32Big

32-bit, big-endian format

kCGBitmapByteOrder16Little

16-bit, little-endian format

kCGBitmapByteOrder32Little

32-bit, little-endian format

kCGBitmapByteOrder16Host

16-bit, host-endian format

kCGBitmapByteOrder32Host

32-bit, host-endian format


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Last updated: 2007-02-26

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