| GL_EXT_copy_texture | |
| http://oss.sgi.com/projects/ogl-sample/registry/EXT/copy_texture.txt | |
| void glCopyTexImage1DEXT (GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLint border) | |
| void glCopyTexImage2DEXT (GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height, GLint border) | |
| void glCopyTexSubImage1DEXT (GLenum target, GLint level, GLint xoffset, GLint x, GLint y, GLsizei width) | |
| void glCopyTexSubImage2DEXT (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height) | |
| void glCopyTexSubImage3DEXT (GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height) |