s_fragprog.c File Reference

#include "main/glheader.h"
#include "main/colormac.h"
#include "main/context.h"
#include "main/texstate.h"
#include "shader/prog_instruction.h"
#include "s_fragprog.h"
#include "s_span.h"

Functions
static INLINE void	swizzle_texel (const GLfloat texel[4], GLfloat colorOut[4], GLuint swizzle)
	Apply texture object's swizzle (X/Y/Z/W/0/1) to incoming 'texel' and return results in 'colorOut'.
static void	fetch_texel_lod (GLcontext *ctx, const GLfloat texcoord[4], GLfloat lambda, GLuint unit, GLfloat color[4])
	Fetch a texel with given lod.
static void	fetch_texel_deriv (GLcontext *ctx, const GLfloat texcoord[4], const GLfloat texdx[4], const GLfloat texdy[4], GLfloat lodBias, GLuint unit, GLfloat color[4])
	Fetch a texel with the given partial derivatives to compute a level of detail in the mipmap.
static void	init_machine (GLcontext *ctx, struct gl_program_machine *machine, const struct gl_fragment_program *program, const SWspan *span, GLuint col)
	Initialize the virtual fragment program machine state prior to running fragment program on a fragment.
static void	run_program (GLcontext *ctx, SWspan *span, GLuint start, GLuint end)
	Run fragment program on the pixels in span from 'start' to 'end' - 1.
void	_swrast_exec_fragment_program (GLcontext *ctx, SWspan *span)
	Execute the current fragment program for all the fragments in the given span.

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Function Documentation

void _swrast_exec_fragment_program	(	GLcontext *	ctx,
		SWspan *	span
	)

Execute the current fragment program for all the fragments in the given span.

static void fetch_texel_deriv	(	GLcontext *	ctx,
		const GLfloat	texcoord[4],
		const GLfloat	texdx[4],
		const GLfloat	texdy[4],
		GLfloat	lodBias,
		GLuint	unit,
		GLfloat	color[4]
	)			[static]

Fetch a texel with the given partial derivatives to compute a level of detail in the mipmap.

Called via machine->FetchTexelDeriv()

Parameters:

lodBias

the lod bias which may be specified by a TXB instruction, otherwise zero.

static void fetch_texel_lod	(	GLcontext *	ctx,
		const GLfloat	texcoord[4],
		GLfloat	lambda,
		GLuint	unit,
		GLfloat	color[4]
	)			[static]

Fetch a texel with given lod.

Called via machine->FetchTexelLod()

static void init_machine	(	GLcontext *	ctx,
		struct gl_program_machine *	machine,
		const struct gl_fragment_program *	program,
		const SWspan *	span,
		GLuint	col
	)			[static]

Initialize the virtual fragment program machine state prior to running fragment program on a fragment.

This involves initializing the input registers, condition codes, etc.

Parameters:

	machine	the virtual machine state to init
	program	the fragment program we're about to run
	span	the span of pixels we'll operate on
	col	which element (column) of the span we'll operate on

static void run_program	(	GLcontext *	ctx,
		SWspan *	span,
		GLuint	start,
		GLuint	end
	)			[static]

Run fragment program on the pixels in span from 'start' to 'end' - 1.

static INLINE void swizzle_texel	(	const GLfloat	texel[4],
		GLfloat	colorOut[4],
		GLuint	swizzle
	)			[static]

Apply texture object's swizzle (X/Y/Z/W/0/1) to incoming 'texel' and return results in 'colorOut'.

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