- (void) saveGLViewToLibrary { int width, height; glGetRenderbufferParameteriv(GL_RENDERBUFFER_OES, GL_RENDERBUFFER_WIDTH_OES, &width); glGetRenderbufferParameteriv(GL_RENDERBUFFER_OES, GL_RENDERBUFFER_HEIGHT_OES, &height); NSInteger myDataLength = width * height * 4; GLubyte *buffer = (GLubyte *) malloc(myDataLength); glReadPixels(0, 0, width, height, GL_RGBA, GL_UNSIGNED_BYTE, buffer); GLubyte *