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It turns out both the software and the OpenGL renderer had the same problem. According to the spec, when SDL_SRCALPHA is set, the colorkey is ignored, so we just need to convert the colorkey into the alpha channel.
author Sam Lantinga <slouken@libsdl.org>
date Tue, 25 Nov 2008 05:29:14 +0000
parents 355632dca928
children
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<HTML
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><TITLE
>SDL_KillThread</TITLE
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><H1
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>SDL_KillThread</H1
><DIV
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><A
NAME="AEN7794"
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><H2
>Name</H2
>SDL_KillThread&nbsp;--&nbsp;Gracelessly terminates the thread.</DIV
><DIV
CLASS="REFSYNOPSISDIV"
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></A
><H2
>Synopsis</H2
><DIV
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><P
></P
><PRE
CLASS="FUNCSYNOPSISINFO"
>#include "SDL.h"
#include "SDL_thread.h"</PRE
><P
><CODE
><CODE
CLASS="FUNCDEF"
>void <B
CLASS="FSFUNC"
>SDL_KillThread</B
></CODE
>(SDL_Thread *thread);</CODE
></P
><P
></P
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN7804"
></A
><H2
>Description</H2
><P
><TT
CLASS="FUNCTION"
>SDL_KillThread</TT
> gracelessly terminates the thread 
associated with <TT
CLASS="PARAMETER"
><I
>thread</I
></TT
>.  If possible, you should 
use some other form of IPC to signal the thread to quit.</P
></DIV
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><A
NAME="AEN7809"
></A
><H2
>See Also</H2
><P
><A
HREF="sdlcreatethread.html"
><TT
CLASS="FUNCTION"
>SDL_CreateThread</TT
></A
>,
<A
HREF="sdlwaitthread.html"
><TT
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>SDL_WaitThread</TT
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