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This overlay is double-buffered. See [[VRAM/BMP]].
 
This overlay is double-buffered. See [[VRAM/BMP]].
   
 
This is the palette for 5D2:
The palette is different in Play mode and normal shooting mode. The colors depend on the chosen skin. The LiveView mode does not seem to change the palette (it seems to use the last one).
 
   
 
[[Image:Palette.jpg]]
The first 5 rows (80 entries) are always the same.
 
   
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The 550D has a different palette, but first 80 entries are almost the same. This is the output of dispcheck():
To test these hypotheses, use Debug -> Draw palette (and if you arrive to different conclusions, edit this page).
 
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[[Image:Palette-550d.png]]
   
 
Transparent entries:
 
Transparent entries:
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* 1 - almost opaque white (just barely transparent)
 
* 1 - almost opaque white (just barely transparent)
   
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Entries from 80 above are scrambled (they are different on the screen than on the dispcheck dump). It seems they are not initialized at camera startup.
This is the palette for Play mode:
 
   
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After going to Live View, then Play, then back to Live View, the palette becomes initialized and looks 99% identical to the 5D2 one.
[[Image:Palette.jpg]]
 
 
This is the palette for the 550D's white skin (Screen color 1):
 
 
[[Image:Palette-550d.png]]
 
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