s_alpha.c File Reference

---

Detailed Description

Functions to apply alpha test.

#include "main/glheader.h"
#include "main/context.h"
#include "main/colormac.h"
#include "main/macros.h"
#include "s_alpha.h"
#include "s_context.h"

Defines
#define	ALPHA_TEST(ALPHA, LOOP_CODE)
Functions
GLint	_swrast_alpha_test (const GLcontext *ctx, SWspan *span)
	Perform the alpha test for an array of pixels.

---

Define Documentation

#define ALPHA_TEST	(	ALPHA,
		LOOP_CODE		)

---

Function Documentation

GLint _swrast_alpha_test	(	const GLcontext *	ctx,
		SWspan *	span
	)

Perform the alpha test for an array of pixels.

For pixels that fail the test, mask[i] will be set to 0.

Returns:

0 if all pixels in the span failed the alpha test, 1 if one or more pixels passed the alpha test.

---