enum PixelFormat

Byte order of one pixel in a pixel arena, named in memory order.

The four that real rasterisers write, so the client never swizzles: poppler's Splash writes bgrx8, cairo's ARGB32 is bgra8 on a little-endian machine. Encoded sRGB like every other colour here (docs/colour-and-blending.md). The a formats are straight alpha; the x formats are opaque, and the fourth byte is ignored rather than trusted to be 0xff.