view docs/html/sdlcreateyuvoverlay.html @ 270:37fa1484f71b

From: "Mattias Engdeg�rd" <f91-men@nada.kth.se> To: slouken@devolution.com Subject: Re: [SDL] Question about SDL_FillRect() I benchmarked with and without clipping UpdateRects and was unable to find any difference on my moderately slow machine. Anyway, I haven't added clipping in this patch, but fixed a couple of bugs and generally cleaned up some of the X11 image code. Most importantly, UpdateRects now checks for both zero height and width. Also, I eliminated the entire code to byteswap X11 images since X11 can do that automatically if you ask it nicely :-)
author Sam Lantinga <slouken@libsdl.org>
date Fri, 18 Jan 2002 22:02:03 +0000
parents e5bc29de3f0a
children 355632dca928
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><H1
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>SDL_CreateYUVOverlay</A
></H1
><DIV
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><A
NAME="AEN2424"
></A
><H2
>Name</H2
>SDL_CreateYUVOverlay&nbsp;--&nbsp;Create a YUV video overlay</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN2427"
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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"
>SDL_Overlay *<B
CLASS="FSFUNC"
>SDL_CreateYUVOverlay</B
></CODE
>(int width, int height, Uint32 format, SDL_Surface *display);</CODE
></P
><P
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></DIV
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><DIV
CLASS="REFSECT1"
><A
NAME="AEN2434"
></A
><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
></DIV
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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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