From 9a21d0a6489f0a95c9a70d1a2292ee654e0a8079 Mon Sep 17 00:00:00 2001 From: Søren Sandmann Pedersen Date: Fri, 15 Mar 2013 20:15:47 -0400 Subject: wordpress --- blend-wp.txt | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/blend-wp.txt b/blend-wp.txt index 32a96a1..4ecfb19 100644 --- a/blend-wp.txt +++ b/blend-wp.txt @@ -1,3 +1,8 @@ +Note that the master is currently the server text - copy that before +making changes. + + + In the Porter/Duff compositing algebra, images are equipped with an alpha channel that determines on a per-pixel basis whether the image is there or not. When the alpha channel is 1, the image is fully there, when it is 0, the image isn't there at all. When it is in between, the image is partially there. In other words, the alpha channel describes the the shape of the image, it does not describe opacity. The way to think of images with an alpha channel is as irregularly shaped pieces of cardboard, not as colored glass. Consider these two images: -- cgit v1.2.3