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Bug 620 - setting the palette causes 200% slowdown on future drawing.
Summary: setting the palette causes 200% slowdown on future drawing.
Status: RESOLVED WONTFIX
Alias: None
Product: SDL
Classification: Unclassified
Component: *don't know* (show other bugs)
Version: 1.2.12
Hardware: x86 Windows (95/98/ME)
: P2 normal
Assignee: Ryan C. Gordon
QA Contact: Sam Lantinga
URL:
Keywords: target-1.2.14
Depends on:
Blocks:
 
Reported: 2008-09-01 22:24 UTC by punkass
Modified: 2009-09-21 03:05 UTC (History)
0 users

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Description punkass 2008-09-01 22:24:41 UTC 
when using 8-bit colour mode and setting a custom palette using:
  SDL_SetPalette(screen, SDL_PHYSPAL, colours, 0, 256);
the framerate of program drops from 60fps to 20fps.

this was compiled using vc++6 on windows 98.  i tried setting the desktop to 256-colours and true-colour with no differences.  
other versions of windows may be affected as well.

   -Erik
Comment 1 Ryan C. Gordon 2009-09-13 16:33:17 UTC 
Tagging this bug with "target-1.2.14" so we can try to resolve it for SDL 1.2.14.

Please note that we may choose to resolve it as WONTFIX. This tag is largely so we have a comprehensive wishlist of bugs to examine for 1.2.14 (and so we can close bugs that we'll never fix, rather than have them live forever in Bugzilla).

--ryan.
Comment 2 Sam Lantinga 2009-09-21 03:05:19 UTC 
At this point I recommend not using the hardware palette on Windows.  Almost all displays support thousands of colors and there are lots of quirks with Windows' palette handling.