blend.h File Reference

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Detailed Description

Blending functions operations.

#include "mtypes.h"

Functions
void GLAPIENTRY	_mesa_BlendFunc (GLenum sfactor, GLenum dfactor)
	Specify the blending operation.
void GLAPIENTRY	_mesa_BlendFuncSeparateEXT (GLenum sfactorRGB, GLenum dfactorRGB, GLenum sfactorA, GLenum dfactorA)
	Process GL_EXT_blend_func_separate().
void GLAPIENTRY	_mesa_BlendEquation (GLenum mode)
void GLAPIENTRY	_mesa_BlendEquationSeparateEXT (GLenum modeRGB, GLenum modeA)
void GLAPIENTRY	_mesa_BlendColor (GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha)
	Set the blending color.
void GLAPIENTRY	_mesa_AlphaFunc (GLenum func, GLclampf ref)
	Specify the alpha test function.
void GLAPIENTRY	_mesa_LogicOp (GLenum opcode)
	Specify a logic pixel operation for color index rendering.
void GLAPIENTRY	_mesa_IndexMask (GLuint mask)
void GLAPIENTRY	_mesa_ColorMask (GLboolean red, GLboolean green, GLboolean blue, GLboolean alpha)
	Enable or disable writing of frame buffer color components.
void GLAPIENTRY	_mesa_ClampColorARB (GLenum target, GLenum clamp)
void	_mesa_init_color (GLcontext *ctx)
	Initialization of the context's Color attribute group.

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Function Documentation

void GLAPIENTRY _mesa_AlphaFunc	(	GLenum	func,
		GLclampf	ref
	)

Specify the alpha test function.

Parameters:

	func	alpha comparison function.
	ref	reference value.

Verifies the parameters and updates gl_colorbuffer_attrib. On a change, flushes the vertices and notifies the driver via dd_function_table::AlphaFunc callback.

void GLAPIENTRY _mesa_BlendColor	(	GLclampf	red,
		GLclampf	green,
		GLclampf	blue,
		GLclampf	alpha
	)

Set the blending color.

Parameters:

	red	red color component.
	green	green color component.
	blue	blue color component.
	alpha	alpha color component.

See also:

glBlendColor().

Clamps the parameters and updates gl_colorbuffer_attrib::BlendColor. On a change, flushes the vertices and notifies the driver via dd_function_table::BlendColor callback.

void GLAPIENTRY _mesa_BlendEquation

(

GLenum

mode

)

void GLAPIENTRY _mesa_BlendEquationSeparateEXT	(	GLenum	modeRGB,
		GLenum	modeA
	)

void GLAPIENTRY _mesa_BlendFunc	(	GLenum	sfactor,
		GLenum	dfactor
	)

Specify the blending operation.

Parameters:

	sfactor	source factor operator.
	dfactor	destination factor operator.

See also:

glBlendFunc, glBlendFuncSeparateEXT

void GLAPIENTRY _mesa_BlendFuncSeparateEXT	(	GLenum	sfactorRGB,
		GLenum	dfactorRGB,
		GLenum	sfactorA,
		GLenum	dfactorA
	)

Process GL_EXT_blend_func_separate().

Parameters:

	sfactorRGB	RGB source factor operator.
	dfactorRGB	RGB destination factor operator.
	sfactorA	alpha source factor operator.
	dfactorA	alpha destination factor operator.

Verifies the parameters and updates gl_colorbuffer_attrib. On a change, flush the vertices and notify the driver via dd_function_table::BlendFuncSeparate.

void GLAPIENTRY _mesa_ClampColorARB	(	GLenum	target,
		GLenum	clamp
	)

void GLAPIENTRY _mesa_ColorMask	(	GLboolean	red,
		GLboolean	green,
		GLboolean	blue,
		GLboolean	alpha
	)

Enable or disable writing of frame buffer color components.

Parameters:

	red	whether to mask writing of the red color component.
	green	whether to mask writing of the green color component.
	blue	whether to mask writing of the blue color component.
	alpha	whether to mask writing of the alpha color component.

See also:

glColorMask().

Sets the appropriate value of gl_colorbuffer_attrib::ColorMask. On a change, flushes the vertices and notifies the driver via the dd_function_table::ColorMask callback.

void GLAPIENTRY _mesa_IndexMask

(

GLuint

mask

)

void _mesa_init_color

(

GLcontext *

ctx

)

Initialization of the context's Color attribute group.

Parameters:

ctx

GL context.

Initializes the related fields in the context color attribute group, __GLcontextRec::Color.

void GLAPIENTRY _mesa_LogicOp

(

GLenum

opcode

)

Specify a logic pixel operation for color index rendering.

Parameters:

opcode

operation.

Verifies that opcode is a valid enum and updates gl_colorbuffer_attrib::LogicOp. On a change, flushes the vertices and notifies the driver via the dd_function_table::LogicOpcode callback.

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