HP Workstation zx2000 OpenGL 1.1 Reference for HP-UX 11.x - Page 44

C glCallLists GL_2_BYTES lists is treated as an array of unsigned bytes. Each pair of bytes specifies a single display-list name. The value of the pair is computed as 256 times the unsigned value of the first byte plus the unsigned value of the second byte. GL_3_BYTES lists is treated as an array of unsigned bytes. Each triplet of bytes specifies a single display-list name. The value of the triplet is computed as 65536 times the unsigned value of the first byte, plus 256 times the unsigned value of the second byte, plus the unsigned value of the third byte. GL_4_BYTES lists is treated as an array of signed bytes, each in the range 128 through 127. The list of display-list names is not null-terminated. Rather, n specifies how many names are to be taken from lists. An additional level of indirection is made available with the glListBase command, which specifies an unsigned offset that is added to each display-list name specified in lists before that display list is executed. glCallLists can appear inside a display list. To avoid the possibility of infinite recursion resulting from display list scaling one another, a limit is placed on the nesting level of display lists during display-list execution. This limit must be at least 64, and it depends on the implementation. GL state is not saved and restored across a call to glCallLists. Thus, changes made to GL state during the execution of the display lists remain after execution is completed. Use glPushAttrib, glPopAttrib, glPushMatrix, and glPopMatrix to preserve GL state across glCallLists calls. Notes Display lists can be executed between a call to glBegin and the corresponding call to glEnd, as long as the display list includes only commands that are allowed in this interval. Errors • GL_INVALID_VALUE is generated if n is negative. • GL_INVALID_ENUM is generated if type is not one of GL_BYTE, GL_UNSIGNED_BYTE, GL_SHORT, GL_UNSIGNED_SHORT, GL_INT, GL_UNSIGNED_INT, GL_FLOAT, GL_2_BYTES, GL_3_BYTES, GL_4_BYTES. Associated Gets glGet with argument GL_LIST_BASE glGet with argument GL_MAX_LIST_NESTING glIsList 44 Chapter 3