Openmoko Bug #1593: progress bottom bar is ugly when launch splinter

[Openmoko Public Trac]

#1593: progress bottom bar is ugly when launch splinter
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 Reporter:  regina_kim  |        Owner:  jeremy 
     Type:  defect      |       Status:  closed 
 Priority:  low         |    Milestone:  ASU    
Component:  Diversity   |      Version:         
 Severity:  normal      |   Resolution:  invalid
 Keywords:  must have   |     Blocking:         
Blockedby:              |  
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Comment(by raster):

 thats how it has ALWAYS been in X - in fact in almost all windowing
 systems. windows included since the 1980's. if a window is set to have "no
 background" its background is not redrawn at ALL until the application
 handles the redraw. this is to be more efficient. instead of filling the
 window with a color THEN drawing it again (2 draws) you only do 1 draw -
 when the app gets to doing the draw. we don't have a composited
 environment where we can syncronise draws and FORCE a window not to be
 drawn until the first actual draw by the application for example.
 compositing is EXPENSIVE though. it consumes lots of ram - LOTS, decreases
 performance as you now have to draw to a backing pixmap ALWAYS then
 "composite" the pixmap to the real screen. with fast enough hardware this
 isn't bad - but we don't have that. (this is why i i have been hoping for
 either many fewer pixels so we can composite in software, or a much better
 graphics solution than the glamo). this then gives us the raw tools to
 consider compositing (not including an accelerated driver to handle the
 alpha blending etc. etc.). :)

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Ticket URL: <https://docs.openmoko.org/trac/ticket/1593#comment:6>
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