XXX - Not complete.

Name

    SGIX_dvc

Name Strings

    GL_SGIX_dvc

Version

    $Date: 1997/02/26 22:47:24 $ $Revision: 1.1 $

Number

    ???

Dependencies

	SGIX_image_compression is required.

Overview

	This extension creates a new compression type to be used with
	SGIX_image_compression which allows the decompression from- and
	compression to client data stored in the formats described by the DVC
	and DVCPRO digital video compression standards.  These formats use the
	YCrCb color space to represent pixels before compression and after
	decompression.

Issues

	- How should the color spaces be specified?

	- Are either DVC or DVCPRO copyrighted or trademarked names?

New Procedures and Functions

	None.

New Tokens

	Accepted by the <param> parameter of PixelStoref and PixelStorei
	when the <pname> parameter is COMPRESSION_TYPE_SGIX:

		DVC_SGIX
		DVCPRO_SGIX

Additions to Chapter 2 of the 1.0 Specification (OpenGL Operation)

	None.

Additions to Chapter 3 of the 1.0 Specification (Rasterization)

	3.6.1 Pixel Storage Modes

	DVC_SGIX and DVCPRO_SGIX are added to the Valid Range of
	UNPACK_COMPRESSION_TYPE in Table 3.1.

Additions to Chapter 4 of the 1.0 Specification (Per-Fragment Operations
and the Frame Buffer)

	4.3.2 Reading Pixels
	
	DVC_SGIX and DVCPRO_SGIX are added to the Valid Range of
	PACK_COMPRESSION_TYPE in Table 4.5.


Additions to Chapter 5 of the 1.0 Specification (Special Functions)

	None.

Additions to Chapter 6 of the 1.0 Specification (State and State Requests)


Additions to the GLX Specification


GLX Protocol


Errors

	XXX

New State

	None.

New Implementation Dependent State

	None.