PixelType.h File Reference

Enumerations
enum	PixelType {   MASK, MONO, RGBx, RGB,   RGBA, RGB32, ARGB32, RGBM,   MRGB32 }
Functions
int	depth (PixelType t)

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Detailed Description

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Enumeration Type Documentation

enum PixelType

Enumeration describing how colors are stored in an array of bytes that is a pixel. This is used as an argument for drawimage(), readimage(), and Image. Notice that the order of the bytes in memory of ARGB32 or RGB32 is a,r,g,b on a little-endian machine and b,g,r,a on a big-endian machine. Due to the use of these types by Windows, this is often the fastest form of data, if you have a choice. To convert an Color to RGB32, shift it right by 8 (for ARGB32 shift the alpha left 24 and or it in). More types may be added in the future. The set is as minimal as possible while still covering the types I have actually encountered. Enumeration values: MASK  1 byte of inverted mask, filled with current color MONO  1 byte of gray scale RGBx  bytes in r,g,b,a,r,g,b,a... order, a byte is ignored RGB  bytes in r,g,b,r,g,b... order RGBA  bytes in r,g,b,a,r,g,b,a... order RGB32  32-bit words containiing 0xaarrggbb (aa is ignored) ARGB32  32-bit words containing 0xaarrggbb RGBM  unpremultiplied bytes in r,g,b,a order MRGB32  unpremultiplied 0xaarrggbb

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Function Documentation

int depth (  PixelType  t  )  [inline]

Turn a PixelType into the number of bytes needed to hold a pixel.

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