glCompressedTexSubImage2D Interface to
OpenGL function glCompressedTexSubImage2D
usage: glCompressedTexSubImage2D( target, level, xoffset, yoffset, width, height, format, imageSize, data )
C function: void glCompressedTexSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const GLvoid* data)
Psychtoolbox/PsychOpenGL/MOGL/wrap/glCompressedTexSubImage2D.m