From mboxrd@z Thu Jan 1 00:00:00 1970 MIME-Version: 1.0 In-Reply-To: <254c73c5116774c8e4a77966a98d0f28@ladd.quanstro.net> References: <254c73c5116774c8e4a77966a98d0f28@ladd.quanstro.net> Date: Thu, 14 Feb 2013 22:31:56 +0200 Message-ID: From: Yaroslav To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net> Content-Type: multipart/alternative; boundary=20cf30780a7e658d2e04d5b5265e Subject: Re: [9fans] xor draw Topicbox-Message-UUID: 1799d282-ead8-11e9-9d60-3106f5b1d025 --20cf30780a7e658d2e04d5b5265e Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable 2013/2/14 erik quanstrom > 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 =CE=B1 channel, it's possible. otherwise one > runs the risk of =CE=B1 multiplication. > > No alpha there - I'd like to learn the trick please. --20cf30780a7e658d2e04d5b5265e Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable



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 =CE=B1 channel, it's possible. =C2=A0oth= erwise one
runs the risk of =CE=B1 multiplication.

<= /div>

No alpha there - I'd like to = learn the trick please.

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