HP Workstation zx2000 OpenGL 1.1 Reference for HP-UX 11.x - Page 353

P glPushAttrib GL_TEXTURE_BIT GL_TRANSFORM_BIT GL_VIEWPORT_BIT Enable bits for the four texture coordinates Border color for each texture image Minification function for each texture image Magnification function for each texture image Texture coordinates and wrap mode for each texture image Color and mode for each texture environment Enable bits GL_TEXTURE_GEN_x, x is S, T, R, and Q GL_TEXTURE_GEN_MODE setting for S, T, R, and Q glTexGen plane equations for S, T, R, and Q Current texture bindings (for example, GL_TEXTURE_2D_BINDING) Coefficients of the six clipping planes Enable bits for the user-definable clipping planes GL_MATRIX_MODE value GL_NORMALIZE flag Depth range (near and far) Viewport origin and extent glPopAttrib restores the values of the state variables saved with the last glPushAttrib command. Those not saved are left unchanged. It is an error to push attributes onto a full 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 attribute stack is empty. Notes Not all values for GL state can be saved on the attribute stack. For example, render mode state, and select and feedback state cannot be saved. Client state must be saved with glPushClientAttrib. The depth of the attribute stack depends on the implementation, but it must be at least 16. Errors • GL_STACK_OVERFLOW is generated if glPushAttrib is called while the attribute stack is full. • GL_STACK_UNDERFLOW is generated if glPopAttrib is called while the attribute stack is empty. • GL_INVALID_OPERATION is generated if glPushAttrib or glPopAttrib is executed between the execution of glBegin and the corresponding execution of glEnd. Chapter 14 353