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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
children
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<HTML
><HEAD
><TITLE
>SDL_FillRect</TITLE
><META
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><H1
><A
NAME="SDLFILLRECT"
></A
>SDL_FillRect</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN2351"
></A
><H2
>Name</H2
>SDL_FillRect&nbsp;--&nbsp;This function performs a fast fill of the given rectangle with some color</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN2354"
></A
><H2
>Synopsis</H2
><DIV
CLASS="FUNCSYNOPSIS"
><A
NAME="AEN2355"
></A
><P
></P
><PRE
CLASS="FUNCSYNOPSISINFO"
>#include "SDL.h"</PRE
><P
><CODE
><CODE
CLASS="FUNCDEF"
>int <B
CLASS="FSFUNC"
>SDL_FillRect</B
></CODE
>(SDL_Surface *dst, SDL_Rect *dstrect, Uint32 color);</CODE
></P
><P
></P
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN2361"
></A
><H2
>Description</H2
><P
>This function performs a fast fill of the given rectangle with
<TT
CLASS="PARAMETER"
><I
>color</I
></TT
>.  If <TT
CLASS="PARAMETER"
><I
>dstrect</I
></TT
>
is <TT
CLASS="LITERAL"
>NULL</TT
>, the whole surface will be filled with
<TT
CLASS="PARAMETER"
><I
>color</I
></TT
>.</P
><P
>The color should be a pixel of the format used by the surface, and
can be generated by the
<A
HREF="sdlmaprgb.html"
>SDL_MapRGB</A
> or <A
HREF="sdlmaprgba.html"
>SDL_MapRGBA</A
>
functions. If the color value contains an alpha value then the
destination is simply "filled" with that alpha information, no blending
takes place.</P
><P
>If there is a clip rectangle set on the destination (set via
<A
HREF="sdlsetcliprect.html"
>SDL_SetClipRect</A
>) then this
function will clip based on the intersection of the clip rectangle and
the <TT
CLASS="PARAMETER"
><I
>dstrect</I
></TT
> rectangle and the dstrect rectangle
will be modified to represent the area actually filled.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN2374"
></A
><H2
>Return Value</H2
><P
>This function returns <SPAN
CLASS="RETURNVALUE"
>0</SPAN
> on success, or
<SPAN
CLASS="RETURNVALUE"
>-1</SPAN
> on error.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN2379"
></A
><H2
>See Also</H2
><P
><A
HREF="sdlmaprgb.html"
><TT
CLASS="FUNCTION"
>SDL_MapRGB</TT
></A
>,
<A
HREF="sdlmaprgb.html"
><TT
CLASS="FUNCTION"
>SDL_MapRGBA</TT
></A
>,
<A
HREF="sdlblitsurface.html"
><TT
CLASS="FUNCTION"
>SDL_BlitSurface</TT
></A
>,
<A
HREF="sdlrect.html"
><SPAN
CLASS="STRUCTNAME"
>SDL_Rect</SPAN
></A
></P
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