glTextureColorMaskSGIS(3G)     OpenGL Reference	    glTextureColorMaskSGIS(3G)

NAME    [Toc]    [Back]

     glTextureColorMaskSGIS - enable and disable the storing of	texture
     element color components

C SPECIFICATION    [Toc]    [Back]

     void glTextureColorMaskSGIS( GLboolean red,
				  GLboolean green,
				  GLboolean blue,
				  GLboolean alpha )

PARAMETERS    [Toc]    [Back]

     red, green, blue, alpha
			   Specify whether red,	green, blue, alpha, luminance,
			   or intensity	components will	or will	not be stored
			   when	defining a texture image.  The initial values
			   are all GL_TRUE, indicating that all	color
			   components determined by the	internal format	of the
			   texture image will be stored.

DESCRIPTION    [Toc]    [Back]

     glTextureColorMaskSGIS specifies whether the individual color components
     of	the texture elements in	the image being	defined	by glTexImage1D,
     glTexImage2D, glTexImage3D, glTexSubImage1D, glTexSubImage2D,
     glTexSubImage3D, glCopyTexImage1D,	glCopyTexImage2D, glCopyTexImage3D,
     glCopySubTexImage1D, glCopySubTexImage2D or glCopySubTexImage3D will or
     will not be stored.  If red is GL_FALSE, no change	is made	to the red,
     luminance or intensity component of any texture element in	the image
     being defined.  If	green, blue or alpha is	GL_FALSE, no change is made to
     the corresponding component of any	texture	element	in the image being
     defined.

     When a texture image is being defined for the first time, the values of
     components	that are not stored as a result	of the texture color mask are
     undefined.

     glTextureColorMaskSGIS has	no effect on the definition of texture images
     with an index or depth component internal format.

ERRORS    [Toc]    [Back]

     GL_INVALID_OPERATION is generated if glTextureColorMaskSGIS is executed
     between the execution of glBegin and the corresponding execution of
     glEnd.

ASSOCIATED GETS    [Toc]    [Back]

     glGet with	argument GL_TEXTURE_COLOR_WRITEMASK_SGIS








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glTextureColorMaskSGIS(3G)     OpenGL Reference	    glTextureColorMaskSGIS(3G)



MACHINE	DEPENDENCIES
     The SGIS_texture_color_mask extension is only supported on	Octane2	VPro
     systems.

SEE ALSO    [Toc]    [Back]

     glTexImage1D, glTexImage2D, glTexImage3D, glTexSubImage1D,
     glTexSubImage2D, glTexSubImage3D, glCopyTexImage1D, glCopyTexImage2D,
     glCopyTexImage3D, glCopySubTexImage1D, glCopySubTexImage2D,
     glCopySubTexImage3D


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