clear.c File Reference

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Detailed Description

glClearColor, glClearIndex, glClear() functions.

#include "glheader.h"
#include "clear.h"
#include "context.h"
#include "colormac.h"
#include "state.h"

Functions
void GLAPIENTRY	_mesa_ClearIndex (GLfloat c)
void GLAPIENTRY	_mesa_ClearColor (GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha)
	Specify the clear values for the color buffers.
void GLAPIENTRY	_mesa_Clear (GLbitfield mask)
	Clear buffers.

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Function Documentation

void GLAPIENTRY _mesa_Clear

(

GLbitfield

mask

)

Clear buffers.

Parameters:

mask

bit-mask indicating the buffers to be cleared.

Flushes the vertices and verifies the parameter. If __GLcontextRec::NewState is set then calls _mesa_update_state() to update gl_frame_buffer::_Xmin, etc. If the rasterization mode is set to GL_RENDER then requests the driver to clear the buffers, via the dd_function_table::Clear callback.

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

Specify the clear values for the color buffers.

Parameters:

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

See also:

glClearColor().

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

void GLAPIENTRY _mesa_ClearIndex

(

GLfloat

c

)

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