Valid
	XHTML 1.1! Valid CSS!
Created 3/7/04
Modified 3/7/04

Writing Modes

s d d'
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1
0 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1
1 0 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1
1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1

Writing into the buffers is both reading from the buffer and writing to it. s is the source, d is the destination and d' is the final write relative to the writing mode 0..15. Write with replacement is mode 3. Write with XOR is mode 6.

glEnable(GL_COLOR_LOGIC_OP);
glLogicOp(GL_XOR);

opgl018.cpp