HP b2600 Reference Manual page 268

L
glLogicOp
opcode is a symbolic constant chosen from the list above. In the explanation of the logical
operations, s represents the incoming color index and d represents the index in the
frame buffer. Standard C-language operators are used. As these bitwise operators
suggest, the logical operation is applied independently to each bit pair of the source and
destination indices or colors.
Notes
Color index logical operations are always supported. RGBA logical operations are
supported only if the GL version is 1.1 or greater.
When more than one RGBA color or index buffer is enabled for drawing, logical
operations are performed separately for each enabled buffer, using for the destination
value the contents of that buffer (see glDrawBuffer).
Errors
•
•
Associated Gets
glGet with argument GL_LOGIC_OP_MODE.
glIsEnabled with argument GL_COLOR_LOGIC_OP or GL_INDEX_LOGIC_OP.
See Also
glAlphaFunc,
glBlendFunc,
glDrawBuffer,
glEnable,
glStencilOp
268
opcode
GL_OR_REVERSE
GL_OR_INVERTED
GL_INVALID_ENUM is generated if opcode is not an accepted value.
GL_INVALID_OPERATION is generated if glLogicOp is executed between the
execution of glBegin and the corresponding execution of glEnd.
Resulting Value
s | !d
!s | d
Chapter 10