polygon.h File Reference

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Detailed Description

Polygon operations.

#include "mtypes.h"

Functions
void	_mesa_polygon_stipple (GLcontext *ctx, const GLubyte *pattern)
	This routine updates the ctx->Polygon.Stipple state.
void GLAPIENTRY	_mesa_CullFace (GLenum mode)
	Specify whether to cull front- or back-facing facets.
void GLAPIENTRY	_mesa_FrontFace (GLenum mode)
	Define front- and back-facing.
void GLAPIENTRY	_mesa_PolygonMode (GLenum face, GLenum mode)
	Set the polygon rasterization mode.
void GLAPIENTRY	_mesa_PolygonOffset (GLfloat factor, GLfloat units)
void GLAPIENTRY	_mesa_PolygonOffsetEXT (GLfloat factor, GLfloat bias)
void GLAPIENTRY	_mesa_PolygonStipple (const GLubyte *mask)
	Called by glPolygonStipple.
void GLAPIENTRY	_mesa_GetPolygonStipple (GLubyte *mask)
	Called by glPolygonStipple.
void	_mesa_init_polygon (GLcontext *ctx)
	Initialize the context polygon state.

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Function Documentation

void GLAPIENTRY _mesa_CullFace

(

GLenum

mode

)

Specify whether to cull front- or back-facing facets.

Parameters:

mode

culling mode.

See also:

glCullFace().

Verifies the parameter and updates gl_polygon_attrib::CullFaceMode. On change, flushes the vertices and notifies the driver via the dd_function_table::CullFace callback.

void GLAPIENTRY _mesa_FrontFace

(

GLenum

mode

)

Define front- and back-facing.

Parameters:

mode

orientation of front-facing polygons.

See also:

glFrontFace().

Verifies the parameter and updates gl_polygon_attrib::FrontFace. On change flushes the vertices and notifies the driver via the dd_function_table::FrontFace callback.

void GLAPIENTRY _mesa_GetPolygonStipple

(

GLubyte *

mask

)

Called by glPolygonStipple.

void _mesa_init_polygon

(

GLcontext *

ctx

)

Initialize the context polygon state.

Parameters:

ctx

GL context.

Initializes __GLcontextRec::Polygon and __GLcontextRec::PolygonStipple attribute groups.

void _mesa_polygon_stipple	(	GLcontext *	ctx,
		const GLubyte *	pattern
	)

This routine updates the ctx->Polygon.Stipple state.

If we're getting the stipple data from a PBO, we map the buffer in order to access the data. In any case, we obey the current pixel unpacking parameters when fetching the stipple data.

In the future, this routine should be used as a fallback, called via ctx->Driver.PolygonStipple(). We'll have to update all the DRI drivers too.

void GLAPIENTRY _mesa_PolygonMode	(	GLenum	face,
		GLenum	mode
	)

Set the polygon rasterization mode.

Parameters:

	face	the polygons which mode applies to.
	mode	how polygons should be rasterized.

See also:

glPolygonMode().

Verifies the parameters and updates gl_polygon_attrib::FrontMode and gl_polygon_attrib::BackMode. On change flushes the vertices and notifies the driver via the dd_function_table::PolygonMode callback.

void GLAPIENTRY _mesa_PolygonOffset	(	GLfloat	factor,
		GLfloat	units
	)

void GLAPIENTRY _mesa_PolygonOffsetEXT	(	GLfloat	factor,
		GLfloat	bias
	)

void GLAPIENTRY _mesa_PolygonStipple

(

const GLubyte *

mask

)

Called by glPolygonStipple.

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