s_accum.c File Reference

#include "main/glheader.h"
#include "main/context.h"
#include "main/macros.h"
#include "main/imports.h"
#include "main/fbobject.h"
#include "s_accum.h"
#include "s_context.h"
#include "s_masking.h"
#include "s_span.h"

Defines
#define	ACCUM_SCALE16   32767.0
#define	USE_OPTIMIZED_ACCUM   0
Functions
static void	rescale_accum (GLcontext *ctx)
	This is called when we fall out of optimized/unscaled accum buffer mode.
void	_swrast_clear_accum_buffer (GLcontext *ctx, struct gl_renderbuffer *rb)
	Clear the accumulation Buffer.
static void	accum_add (GLcontext *ctx, GLfloat value, GLint xpos, GLint ypos, GLint width, GLint height)
static void	accum_mult (GLcontext *ctx, GLfloat mult, GLint xpos, GLint ypos, GLint width, GLint height)
static void	accum_accum (GLcontext *ctx, GLfloat value, GLint xpos, GLint ypos, GLint width, GLint height)
static void	accum_load (GLcontext *ctx, GLfloat value, GLint xpos, GLint ypos, GLint width, GLint height)
static void	accum_return (GLcontext *ctx, GLfloat value, GLint xpos, GLint ypos, GLint width, GLint height)
void	_swrast_Accum (GLcontext *ctx, GLenum op, GLfloat value)
	Software fallback for glAccum.

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Define Documentation

#define ACCUM_SCALE16   32767.0

#define USE_OPTIMIZED_ACCUM   0

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Function Documentation

void _swrast_Accum	(	GLcontext *	ctx,
		GLenum	op,
		GLfloat	value
	)

Software fallback for glAccum.

void _swrast_clear_accum_buffer	(	GLcontext *	ctx,
		struct gl_renderbuffer *	rb
	)

Clear the accumulation Buffer.

static void accum_accum	(	GLcontext *	ctx,
		GLfloat	value,
		GLint	xpos,
		GLint	ypos,
		GLint	width,
		GLint	height
	)			[static]

static void accum_add	(	GLcontext *	ctx,
		GLfloat	value,
		GLint	xpos,
		GLint	ypos,
		GLint	width,
		GLint	height
	)			[static]

static void accum_load	(	GLcontext *	ctx,
		GLfloat	value,
		GLint	xpos,
		GLint	ypos,
		GLint	width,
		GLint	height
	)			[static]

static void accum_mult	(	GLcontext *	ctx,
		GLfloat	mult,
		GLint	xpos,
		GLint	ypos,
		GLint	width,
		GLint	height
	)			[static]

static void accum_return	(	GLcontext *	ctx,
		GLfloat	value,
		GLint	xpos,
		GLint	ypos,
		GLint	width,
		GLint	height
	)			[static]

static void rescale_accum

(

GLcontext *

ctx

)

[static]

This is called when we fall out of optimized/unscaled accum buffer mode.

That is, we convert each unscaled accum buffer value into a scaled value representing the range[-1, 1].

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