HP Workstation zx2000 OpenGL 1.1 Reference for HP-UX 11.x - Page 355

P glPushClientAttrib glPushClientAttrib glPushClientAttrib, glPopClientAttrib: push and pop the client attribute stack. C Specification void glPushClientAttrib( GLbitfield mask) void glPopClientAttrib(void) Parameters mask Specifies a mask that indicates which attributes to save. Values for mask are listed below. Description glPushClientAttrib takes one argument, a mask that indicates which groups of client-state variables to save on the client attribute stack. Symbolic constants are used to set bits in the mask. mask is typically constructed by ORing several of these constants together. The special mask GL_CLIENT_ALL_ATTRIB_BITS can be used to save all stackable client state. The symbolic mask constants and their associated GL client state are as follows (the second column lists which attributes are saved): GL_CLIENT_PIXEL_STORE_BIT GL_CLIENT_VERTEX_ARRAY_BIT Pixel storage modes Vertex arrays (and enables) glPopClientAttrib restores the values of the client-state variables saved with the last glPushClientAttrib. Those not saved are left unchanged. It is an error to push attributes onto a full client attribute stack, or to pop attributes off an empty stack. In either case, the error flag is set, and no other change is made to GL state. Initially, the client attribute stack is empty. Notes glPushClientAttrib is available only if the GL version is 1.1 or greater. Not all values for GL client state can be saved on the attribute stack. For example, select and feedback state cannot be saved. The depth of the attribute stack depends on the implementation, but it must be at least 16. Use glPushAttrib and glPopAttrib to push and restore state which is kept on the server. Only pixel storage modes and vertex array state may be pushed and popped with glPushClientAttrib and glPopClientAttrib. Chapter 14 355