SpanFlags

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Detailed Description

Special bitflags to describe span data.

In general, the point/line/triangle functions interpolate/emit the attributes specified by swrast->_ActiveAttribs (i.e. FRAT_BIT_* values). Some things don't fit into that, though, so we have these flags.

Defines
#define	SPAN_RGBA   0x01
	interpMask and arrayMask
#define	SPAN_INDEX   0x02
	interpMask and arrayMask
#define	SPAN_Z   0x04
	interpMask and arrayMask
#define	SPAN_FLAT   0x08
	interpMask: flat shading?
#define	SPAN_XY   0x10
	array.x[], y[] valid?
#define	SPAN_MASK   0x20
	was array.mask[] filled in by caller?
#define	SPAN_LAMBDA   0x40
	array.lambda[] valid?
#define	SPAN_COVERAGE   0x80
	array.coverage[] valid?

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Define Documentation

#define SPAN_COVERAGE   0x80

array.coverage[] valid?

#define SPAN_FLAT   0x08

interpMask: flat shading?

#define SPAN_INDEX   0x02

interpMask and arrayMask

#define SPAN_LAMBDA   0x40

array.lambda[] valid?

#define SPAN_MASK   0x20

was array.mask[] filled in by caller?

#define SPAN_RGBA   0x01

interpMask and arrayMask

#define SPAN_XY   0x10

array.x[], y[] valid?

#define SPAN_Z   0x04

interpMask and arrayMask

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