Talk:Smedia Glamo 3362

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You can try it for xlib. Scale bg.png up an down. You will notice the difference.
 
You can try it for xlib. Scale bg.png up an down. You will notice the difference.
oblit is the SDL blit, xblit is the xlib blit.
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oblit is the SDL blit, xblit is the xlib blit. I think that blitting is accelerated but sending blitting commands takes to much time. So a few big blits (maybe 20 or 30) are better then 300 small ones.
 
Link to source: [http://astabs.de/playground/blits.tar.gz]
 
Link to source: [http://astabs.de/playground/blits.tar.gz]
  
 
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Revision as of 22:14, 27 July 2010

Blitting with hardware acceleration is only supported in xlib NOT in SDL. The Size of the tiles should be big. I used 128x160 in a 640x480 resolution. Speed tests:

SDL: 32x32 tiles -> 13 FPS

     128x160 tiles -> 3 FPS


xlib: 32x32 tiles -> 12-13 FPS (300 blits)

     128x160 tiles -> 35 FPS (15 blits)

You can try it for xlib. Scale bg.png up an down. You will notice the difference. oblit is the SDL blit, xblit is the xlib blit. I think that blitting is accelerated but sending blitting commands takes to much time. So a few big blits (maybe 20 or 30) are better then 300 small ones. Link to source: [1]


Personal tools

Blitting with hardware acceleration is only supported in xlib NOT in SDL. The Size of the tiles should be big. I used 128x160 in a 640x480 resolution. Speed tests:

SDL: 32x32 tiles -> 13 FPS

     128x160 tiles -> 3 FPS


xlib: 32x32 tiles -> 12-13 FPS (300 blits)

     128x160 tiles -> 35 FPS (15 blits)

You can try it for xlib. Scale bg.png up an down. You will notice the difference. oblit is the SDL blit, xblit is the xlib blit. Link to source: [1]