From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: Date: Sat, 27 Dec 2008 15:10:04 -0800 From: "Russ Cox" To: "Fans of the OS Plan 9 from Bell Labs" <9fans@9fans.net> Subject: Re: [9fans] alpha channel In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: Topicbox-Message-UUID: 72861132-ead4-11e9-9d60-3106f5b1d025 > this is regarding alpha channel. > i am able to change the alpha value for an image by setting new alpha value > for every pixel. > but i was thinking we also could set the alpha value for all of the pixels > in a window/screen just but setting the value somewhere, say using ctl. is > this not possible in plan9 or inferno? i am wondering how i got that the graphics operators support alpha blending but the window system still assumes, at a deep level, that windows are opaque rectangles. russ