viewport.c File Reference

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Detailed Description

glViewport and glDepthRange functions.

#include "context.h"
#include "macros.h"
#include "viewport.h"

Functions
void GLAPIENTRY	_mesa_Viewport (GLint x, GLint y, GLsizei width, GLsizei height)
	Set the viewport.
void	_mesa_set_viewport (GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height)
	Set new viewport parameters and update derived state (the _WindowMap matrix).
void GLAPIENTRY	_mesa_DepthRange (GLclampd nearval, GLclampd farval)
	Called by glDepthRange.
void	_mesa_init_viewport (GLcontext *ctx)
	Initialize the context viewport attribute group.
void	_mesa_free_viewport_data (GLcontext *ctx)
	Free the context viewport attribute group data.

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Function Documentation

void GLAPIENTRY _mesa_DepthRange	(	GLclampd	nearval,
		GLclampd	farval
	)

Called by glDepthRange.

Parameters:

	nearval	specifies the Z buffer value which should correspond to the near clip plane
	farval	specifies the Z buffer value which should correspond to the far clip plane

void _mesa_free_viewport_data

(

GLcontext *

ctx

)

Free the context viewport attribute group data.

Parameters:

ctx

the GL context.

void _mesa_init_viewport

(

GLcontext *

ctx

)

Initialize the context viewport attribute group.

Parameters:

ctx

the GL context.

void _mesa_set_viewport	(	GLcontext *	ctx,
		GLint	x,
		GLint	y,
		GLsizei	width,
		GLsizei	height
	)

Set new viewport parameters and update derived state (the _WindowMap matrix).

Usually called from _mesa_Viewport().

Parameters:

	ctx	GL context.
	x,y	coordinates of the lower left corner of the viewport rectangle.
	width	width of the viewport rectangle.
	height	height of the viewport rectangle.

void GLAPIENTRY _mesa_Viewport	(	GLint	x,
		GLint	y,
		GLsizei	width,
		GLsizei	height
	)

Set the viewport.

See also:

Called via glViewport() or display list execution.

Flushes the vertices and calls _mesa_set_viewport() with the given parameters.

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