s_texcombine.c File Reference

#include "main/glheader.h"
#include "main/context.h"
#include "main/colormac.h"
#include "main/image.h"
#include "main/imports.h"
#include "main/pixel.h"
#include "shader/prog_instruction.h"
#include "s_context.h"
#include "s_texcombine.h"

Typedefs
typedef float(*	float4_array )[4]
	Pointer to array of float[4] This type makes the code below more concise and avoids a lot of casting.
Functions
static INLINE float4_array	get_texel_array (SWcontext *swrast, GLuint unit)
	Return array of texels for given unit.
static void	texture_combine (GLcontext *ctx, GLuint unit, GLuint n, const float4_array primary_rgba, const GLfloat *texelBuffer, GLchan(*rgbaChan)[4])
	Do texture application for: GL_EXT_texture_env_combine GL_ARB_texture_env_combine GL_EXT_texture_env_dot3 GL_ARB_texture_env_dot3 GL_ATI_texture_env_combine3 GL_NV_texture_env_combine4 conventional GL texture env modes.
static void	swizzle_texels (GLuint swizzle, GLuint count, float4_array texels)
	Apply X/Y/Z/W/0/1 swizzle to an array of colors/texels.
void	_swrast_texture_span (GLcontext *ctx, SWspan *span)
	Apply texture mapping to a span of fragments.

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Typedef Documentation

typedef float(* float4_array)[4]

Pointer to array of float[4] This type makes the code below more concise and avoids a lot of casting.

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Function Documentation

void _swrast_texture_span	(	GLcontext *	ctx,
		SWspan *	span
	)

Apply texture mapping to a span of fragments.

static INLINE float4_array get_texel_array	(	SWcontext *	swrast,
		GLuint	unit
	)			[static]

Return array of texels for given unit.

static void swizzle_texels	(	GLuint	swizzle,
		GLuint	count,
		float4_array	texels
	)			[static]

Apply X/Y/Z/W/0/1 swizzle to an array of colors/texels.

See GL_EXT_texture_swizzle.

static void texture_combine	(	GLcontext *	ctx,
		GLuint	unit,
		GLuint	n,
		const float4_array	primary_rgba,
		const GLfloat *	texelBuffer,
		GLchan *	rgbaChan[4]
	)			[static]

Do texture application for: GL_EXT_texture_env_combine GL_ARB_texture_env_combine GL_EXT_texture_env_dot3 GL_ARB_texture_env_dot3 GL_ATI_texture_env_combine3 GL_NV_texture_env_combine4 conventional GL texture env modes.

Parameters:

	ctx	rendering context
	unit	the texture combiner unit
	n	number of fragments to process (span width)
	primary_rgba	incoming fragment color array
	texelBuffer	pointer to texel colors for all texture units
	rgba	incoming/result fragment colors

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