glPushClientAttrib

glPushClientAttrib: man2/glPushClientAttrib.xml

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 specifying the bitwise-or of 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 Pixel storage modes GL_CLIENT_VERTEX_ARRAY_BIT 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.

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 that is kept on the server. Only pixel storage modes and vertex array state may be pushed and popped with glPushClientAttrib and glPopClientAttrib. For OpenGL versions 1.3 and greater, or when the ARB_multitexture extension is supported, pushing and popping client vertex array state applies to all supported texture units, and the active client texture state.