glActiveTexture selects which texture unit subsequent texture state calls will affect. The number of texture units an implementation supports is implementation dependent, but must be at least 2. Vertex arrays are client-side GL resources, which are selected by the glClientActiveTexture routine.
glActiveTexture is only supported if the GL version is 1.3 or greater, or if ARB_multitexture is included in the string returned by glGetString when called with the argument GL_EXTENSIONS.
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glActiveTexture: man2/glActiveTexture.xml
glActiveTexture selects which texture unit subsequent texture state calls will affect. The number of texture units an implementation supports is implementation dependent, but must be at least 2. Vertex arrays are client-side GL resources, which are selected by the glClientActiveTexture routine.
glActiveTexture is only supported if the GL version is 1.3 or greater, or if ARB_multitexture is included in the string returned by glGetString when called with the argument GL_EXTENSIONS.