<div class="gmail_quote">---------- Forwarded message ---------- From: manisha salve <<a href="mailto:msalve@gmail.com">msalve@gmail.com</a>> Date: Jan 17, 2008 5:31 PM Subject: How to implement Alpha blending To: <a href="mailto:xorg@lists.freedesktop.org">xorg@lists.freedesktop.org</a> Hi , I am writing Kdrive DDX driver . The Hardware provides Alpha blending acceleration. But in Kdrive there are two functions provided for rendering (Composite and Blend). I have gone through sample drivers. But i am not able to understand, out of Composite and Blend which function to use for alpha blending ??? And what is the difference betwwen these two accelerations ??? And to use alpha blending , where the alpha value is stored ??? Thanks -Manisha </div>