The OpenGL® Shading Language

®The OpenGL Shading LanguageLanguage Version: 4.20Document Revision: 82-Sept-2011Editor: John KessenichVersion 1.1 Authors: John Kessenich, Dave Baldwin, Randi RostCopyright (c) 2008-2011 The Khronos Group Inc. All Rights Reserved.This specification is protected by copyright laws and contains material proprietary to the Khronos Group,Inc. It or any components may not be reproduced, republished, distributed, transmitted, displayed,broadcast or otherwise exploited in any manner without the express prior written permission of K hronosGroup. You may use this specification for implementing the functionality therein, without a ltering orremoving any trademark, copyright or other notice from the specification, but the receipt or pos session ofthis specification does not convey any rights to reproduce, disclose, or distribute its conte nts, or tomanufacture, use, or sell anything that it may describe, in whole or in part.Khronos Group grants express permission to any current Promoter, Contributor or Adopter me mber ofKhronos to copy and redistribute UNMODIFIED versions of this specification in any fashion, prov ided thatNO CHARGE is made for the specification and the latest available update of the specification for anyversion of the API is used whenever possible. Such distributed specification may be re-form atted ASLONG AS the contents of the specification are not changed in any way. The specificatio n may beincorporated into a product that is sold as long ...