Mixed pixmap creation

[fancy fang]

Dear all,
           In exaCreatePixmap_mixed from Xserver 1.9.0, when w == 1 && h ==
1, it will malloc pixmap data immediately. Please let me name this kind of
pixmap as Unit Pixmap. First, I don't know what the benifit is. Second, when
the exaDoMigration_mixed is executed, it will allocate driver pixmap for
Unit Pixmap. But, I think the driver pixmap for Unit Pixmap is not necessary
from the point of performance. Can anyone give explanations ?  Thanks a lot!

Best wishes,

FancyFang
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.x.org/archives/xorg-devel/attachments/20101014/6af7c3a8/attachment.html>