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Date: Sat, 10 Apr 2004 02:25:33 -0400 From: Glenn Maynard To: sdl@libsdl.org Subject: [SDL] SDL_SetVideoMode() failing and not setting an error (patch) Running an OpenGL SDL application off 1.2.7, at SDL_InitSubSystem(SDL_INIT_VIDEO) time: Warning: Unable to initialize AAlib mouseUsing AAlib driver: Slang driver 1.0 (slang) SDL_SetVideoMode then fails; SDL_GetError() returns "". The installation problem is straightforward: X (the higher priority driver) isn't running, so SDL is falling back on aalib. However, no error is being set when aalib fails to initialize. This also happens with the svgalib driver. SDL_video.c line ~653 sets mode to NULL, since aalib didn't return an OpenGL surface. Line ~711 ("failed setting a video mode") returns NULL. The attached patch sets an error. It's a horrible, useless error message--it should really say eg. "aalib does not support OpenGL"; this should probably be done earlier in the individual drivers, too.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 11 Apr 2004 19:54:40 +0000
parents 355632dca928
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<HTML
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>SDL_PushEvent</TITLE
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><H1
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>SDL_PushEvent</H1
><DIV
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><A
NAME="AEN5536"
></A
><H2
>Name</H2
>SDL_PushEvent&nbsp;--&nbsp;Pushes an event onto the event queue</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
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><H2
>Synopsis</H2
><DIV
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><P
></P
><PRE
CLASS="FUNCSYNOPSISINFO"
>#include "SDL.h"</PRE
><P
><CODE
><CODE
CLASS="FUNCDEF"
>int <B
CLASS="FSFUNC"
>SDL_PushEvent</B
></CODE
>(SDL_Event *event);</CODE
></P
><P
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><DIV
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><A
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><H2
>Description</H2
><P
>The event queue can actually be used as a two way communication channel. Not only can events be read from the queue, but the user can also push their own events onto it. <TT
CLASS="PARAMETER"
><I
>event</I
></TT
> is a pointer to the event structure you wish to push onto the queue.</P
><DIV
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><BLOCKQUOTE
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><P
><B
>Note: </B
>Pushing device input events onto the queue doesn't modify the state of the device within SDL.</P
></BLOCKQUOTE
></DIV
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><DIV
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><A
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><H2
>Return Value</H2
><P
>Returns <SPAN
CLASS="RETURNVALUE"
>0</SPAN
> on success or <SPAN
CLASS="RETURNVALUE"
>-1</SPAN
> if the event couldn't be pushed.</P
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><H2
>Examples</H2
><P
>See <A
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><SPAN
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>SDL_Event</SPAN
></A
>.</P
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>SDL_PollEvent</TT
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>,
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>SDL_PeepEvents</TT
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