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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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>SDL_GetError</TITLE
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>SDL_GetError</H1
><DIV
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NAME="AEN653"
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><H2
>Name</H2
>SDL_GetError&nbsp;--&nbsp;Get SDL error string</DIV
><DIV
CLASS="REFSYNOPSISDIV"
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></A
><H2
>Synopsis</H2
><DIV
CLASS="FUNCSYNOPSIS"
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></A
><P
></P
><PRE
CLASS="FUNCSYNOPSISINFO"
>#include "SDL/SDL.h"</PRE
><P
><CODE
><CODE
CLASS="FUNCDEF"
>char *<B
CLASS="FSFUNC"
>SDL_GetError</B
></CODE
>(void);</CODE
></P
><P
></P
></DIV
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><H2
>Description</H2
><P
><TT
CLASS="FUNCTION"
>SDL_GetError</TT
> returns a NULL terminated string containing information about the last internal SDL error.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
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></A
><H2
>Return Value</H2
><P
><TT
CLASS="FUNCTION"
>SDL_GetError</TT
> returns a string containing the last error.</P
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