gfxIFormats Interface

 RGB    - duh...

const gfx_format RGB = 0

 BGR    - same as RGB except byteswaped

const gfx_format BGR = 1

 RGB_A1 - RGB image and 1-bit alpha mask

const gfx_format RGB_A1 = 2

 BGR_A1 - same as RGB_A1 except byteswaped

const gfx_format BGR_A1 = 3

 RGB_A8 - RGB image and 8-bit alpha image

const gfx_format RGB_A8 = 4

 BGR_A8 - same as RGB_A8 except byteswaped

const gfx_format BGR_A8 = 5

 RGBA   - packed RGBA image

const gfx_format RGBA = 6

 BGRA   - packed RGBA image

const gfx_format BGRA = 7

 PAL    - Palette based image data, all opaque colors
		  PRUint32 colormap[256];
		  PRUint8 pixels[width*height];

const gfx_format PAL = 8

 PAL_A1 - Palette based image data, with transparency
		  PRUint32 colormap[256];
		  PRUint8 pixels[width*height];

const gfx_format PAL_A1 = 9