view docs/html/sdlcreateyuvoverlay.html @ 4209:62e86ab81e3c SDL-1.2

Fixed bug #570 SDL_SemWaitTimeout in src/thread/generic/SDL_syssem.c line 179 (SVN trunk): --sem->count; should be if (retval == 0) { --sem->count; } Without this, sem->count will underflow on timeout effectively breaking the semaphore. It appears that the implementation has been wrong since the initial revision.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 21 Sep 2009 07:32:26 +0000
parents 355632dca928
children
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>SDL_CreateYUVOverlay</H1
><DIV
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><A
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><H2
>Name</H2
>SDL_CreateYUVOverlay&nbsp;--&nbsp;Create a YUV video overlay</DIV
><DIV
CLASS="REFSYNOPSISDIV"
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>Synopsis</H2
><DIV
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><P
></P
><PRE
CLASS="FUNCSYNOPSISINFO"
>#include "SDL.h"</PRE
><P
><CODE
><CODE
CLASS="FUNCDEF"
>SDL_Overlay *<B
CLASS="FSFUNC"
>SDL_CreateYUVOverlay</B
></CODE
>(int width, int height, Uint32 format, SDL_Surface *display);</CODE
></P
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><H2
>Description</H2
><P
><TT
CLASS="FUNCTION"
>SDL_CreateYUVOverlay</TT
> creates a YUV overlay of the specified <TT
CLASS="PARAMETER"
><I
>width</I
></TT
>, <TT
CLASS="PARAMETER"
><I
>height</I
></TT
> and <TT
CLASS="PARAMETER"
><I
>format</I
></TT
> (see <A
HREF="sdloverlay.html"
><SPAN
CLASS="STRUCTNAME"
>SDL_Overlay</SPAN
></A
> for a list of available formats), for the provided <TT
CLASS="PARAMETER"
><I
>display</I
></TT
>. A <A
HREF="sdloverlay.html"
><SPAN
CLASS="STRUCTNAME"
>SDL_Overlay</SPAN
></A
> structure is returned.</P
><P
>The term 'overlay' is a misnomer since, unless the overlay is created in hardware, the contents for the display surface underneath the area where the overlay is shown will be overwritten when the overlay is displayed.</P
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><H2
>See Also</H2
><P
><A
HREF="sdloverlay.html"
><SPAN
CLASS="STRUCTNAME"
>SDL_Overlay</SPAN
></A
>,
<A
HREF="sdldisplayyuvoverlay.html"
><TT
CLASS="FUNCTION"
>SDL_DisplayYUVOverlay</TT
></A
>,
<A
HREF="sdlfreeyuvoverlay.html"
><TT
CLASS="FUNCTION"
>SDL_FreeYUVOverlay</TT
></A
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