1// Copyright 2017-2021 The Khronos Group Inc. 2// SPDX-License-Identifier: CC-BY-4.0 3 4# OpenGL XML API Registry 5 6This directory contains the OpenGL, GLX, and WGL XML API registries, in 7gl.xml, glx.xml, and wgl.xml respectively. They are used to reserve 8enumerant ranges for vendors working on new extensions, to register 9extension interfaces when an extension is published, and to generate the 10Khronos-supplied header files in ../api . 11 12The canonical versions are always found in the master branch of the github 13repository at https://github.com/KhronosGroup/OpenGL-Registry 14 15The 'validate' Makefile target uses the 'jing' tool to confirm that each XML 16file is structurally valid and conforms to the registry schema in 17registry.rnc. The schema is described in detail in readme.pdf. 18 19The 'default' Makefile target generates updated headers in ../api/ from the 20XML files. 21 22Note that while there are targets for ../api/{gl.h,glx.h,wgl.h} in 23genglvnd.py and genheaders.py, these targets are not generated by default 24and are experimental. At present, you should use the versions of these 25headers shipped with your OS or IHV SDK. 26