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blend.c File Reference

Blending operations. More...

#include "glheader.h"
#include "blend.h"
#include "colormac.h"
#include "context.h"
#include "enums.h"
#include "macros.h"
#include "mtypes.h"

Initialization
void	_mesa_init_color (GLcontext *ctx)
	Initialization of the context's Color attribute group. More...
Functions
void GLAPIENTRY	_mesa_BlendFunc (GLenum sfactor, GLenum dfactor)
	Specify the blending operation. More...
void GLAPIENTRY	_mesa_BlendFuncSeparateEXT (GLenum sfactorRGB, GLenum dfactorRGB, GLenum sfactorA, GLenum dfactorA)
	Process GL_EXT_blend_func_separate(). More...
GLboolean	_mesa_validate_blend_equation (GLcontext *ctx, GLenum mode, GLboolean is_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. More...
void GLAPIENTRY	_mesa_AlphaFunc (GLenum func, GLclampf ref)
	Specify the alpha test function. More...
void GLAPIENTRY	_mesa_LogicOp (GLenum opcode)
	Specify a logic pixel operation for color index rendering. More...
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. More...

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Detailed Description

Blending operations.

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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 Swizzles the inputs and calls glBlendFuncSeparateEXT. This is done using the CurrentDispatch table in the context, so this same function can be used while compiling display lists. Therefore, there is no need for the display list code to save and restore this function.

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_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.

GLboolean _mesa_validate_blend_equation (  GLcontext *    ctx, GLenum    mode, GLboolean    is_separate )  [static]

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