SWspan Struct Reference

#include <s_span.h>

Data Fields
GLint	x
GLint	y
GLuint	end
GLboolean	writeAll
GLenum	primitive
GLuint	facing
GLbitfield	interpMask
GLfloat	attrStart [FRAG_ATTRIB_MAX][4]
GLfloat	attrStepX [FRAG_ATTRIB_MAX][4]
GLfloat	attrStepY [FRAG_ATTRIB_MAX][4]
GLfixed	red
GLfixed	redStep
GLfixed	green
GLfixed	greenStep
GLfixed	blue
GLfixed	blueStep
GLfixed	alpha
GLfixed	alphaStep
GLfixed	index
GLfixed	indexStep
GLfixed	z
GLfixed	zStep
GLfixed	intTex [2]
GLfixed	intTexStep [2]
GLbitfield	arrayMask
GLbitfield	arrayAttribs
SWspanarrays *	array

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Detailed Description

The SWspan structure describes the colors, Z, fogcoord, texcoords, etc for either a horizontal run or an array of independent pixels. We can either specify a base/step to indicate interpolated values, or fill in explicit arrays of values. The interpMask and arrayMask bitfields indicate which attributes are active interpolants or arrays, respectively.

It would be interesting to experiment with multiprocessor rasterization with this structure. The triangle rasterizer could simply emit a stream of these structures which would be consumed by one or more span-processing threads which could run in parallel.

Definition at line 101 of file s_span.h.

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The documentation for this struct was generated from the following file:

• dll/3rdparty/mesa32/src/swrast/s_span.h