* [9fans] xor draw @ 2013-02-14 18:51 Yaroslav 2013-02-14 19:10 ` erik quanstrom 0 siblings, 1 reply; 3+ messages in thread From: Yaroslav @ 2013-02-14 18:51 UTC (permalink / raw) To: 9fans [-- Attachment #1: Type: text/plain, Size: 82 bytes --] we can't do XOR drawing with draw(2) like with bitblt, can we? -- - Yaroslav [-- Attachment #2: Type: text/html, Size: 134 bytes --] ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [9fans] xor draw 2013-02-14 18:51 [9fans] xor draw Yaroslav @ 2013-02-14 19:10 ` erik quanstrom 2013-02-14 20:31 ` Yaroslav 0 siblings, 1 reply; 3+ messages in thread From: erik quanstrom @ 2013-02-14 19:10 UTC (permalink / raw) To: 9fans On Thu Feb 14 13:52:09 EST 2013, yarikos@gmail.com wrote: > we can't do XOR drawing with draw(2) like with bitblt, can we? if there's a trivial α channel, it's possible. otherwise one runs the risk of α multiplication. - erik ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [9fans] xor draw 2013-02-14 19:10 ` erik quanstrom @ 2013-02-14 20:31 ` Yaroslav 0 siblings, 0 replies; 3+ messages in thread From: Yaroslav @ 2013-02-14 20:31 UTC (permalink / raw) To: Fans of the OS Plan 9 from Bell Labs [-- Attachment #1: Type: text/plain, Size: 352 bytes --] 2013/2/14 erik quanstrom <quanstro@quanstro.net> > On Thu Feb 14 13:52:09 EST 2013, yarikos@gmail.com wrote: > > > we can't do XOR drawing with draw(2) like with bitblt, can we? > > if there's a trivial α channel, it's possible. otherwise one > runs the risk of α multiplication. > > No alpha there - I'd like to learn the trick please. [-- Attachment #2: Type: text/html, Size: 878 bytes --] ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2013-02-14 20:31 UTC | newest] Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2013-02-14 18:51 [9fans] xor draw Yaroslav 2013-02-14 19:10 ` erik quanstrom 2013-02-14 20:31 ` Yaroslav
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