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I've made so many changes I don't dare continue until I check the current stuff in. /test/testatomic.c performs absolutely basic tests to show that the function work as expected. Need a second test to do more detailed tests. /include/SDL_atomic.h provides declarations for all included functions. /src/atomic/linux/SDL_atomic.c provided all the functions. On a generic built the 64 bit functions work, but they are emulated. On a build for -march=pentium and above the 64 bit functions use native instructions /src/atomic/dummy/SDL_atomic.c emulates all the operations using SDL_mutex.h. /src/atomic/win32/SDL_atomic.c is a copy of dummy /src/atomic/macosx/SDL_atomic.s is a copy of dummy These versions of SDL_atomic.c provide a frame work for building the library with a mixture of native and emulated functions. This allows the whole library to be provided on all platforms. (I hope.) I hope this fits with the SDL philosophy of either providing a common subset or emulating when the platform is missing a feature. I have not added dummy, macosx, or win32 to the build. They are there as place holders for future work. I have modified congifure.in to compile sources in /src/atomic/linux. (The SDL configure.in file is an amazing piece of work and I hope I didn't mess it up. :-)
author Bob Pendleton <bob@pendleton.com>
date Mon, 29 Jun 2009 19:54:43 +0000
parents 355632dca928
children
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>SDL_CreateRGBSurfaceFrom</TITLE
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>SDL_CreateRGBSurfaceFrom</H1
><DIV
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><A
NAME="AEN1856"
></A
><H2
>Name</H2
>SDL_CreateRGBSurfaceFrom&nbsp;--&nbsp;Create an SDL_Surface from pixel data</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN1859"
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><H2
>Synopsis</H2
><DIV
CLASS="FUNCSYNOPSIS"
><A
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><P
></P
><PRE
CLASS="FUNCSYNOPSISINFO"
>#include "SDL.h"</PRE
><P
><CODE
><CODE
CLASS="FUNCDEF"
>SDL_Surface *<B
CLASS="FSFUNC"
>SDL_CreateRGBSurfaceFrom</B
></CODE
>(void *pixels, int width, int height, int depth, int pitch, Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask);</CODE
></P
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><H2
>Description</H2
><P
>Creates an SDL_Surface from the provided pixel data.</P
><P
>The data stored in <TT
CLASS="PARAMETER"
><I
>pixels</I
></TT
> is assumed to be of the <TT
CLASS="PARAMETER"
><I
>depth</I
></TT
> specified in the parameter list. The pixel data is not copied into the <SPAN
CLASS="STRUCTNAME"
>SDL_Surface</SPAN
> structure so it should not be freed until the surface has been freed with a called to <A
HREF="sdlfreesurface.html"
>SDL_FreeSurface</A
>. <TT
CLASS="PARAMETER"
><I
>pitch</I
></TT
> is the length of each scanline in bytes.  </P
><P
>See <A
HREF="sdlcreatergbsurface.html"
><TT
CLASS="FUNCTION"
>SDL_CreateRGBSurface</TT
></A
> for a more detailed description of the other parameters.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN1878"
></A
><H2
>Return Value</H2
><P
>Returns the created surface, or <SPAN
CLASS="RETURNVALUE"
>NULL</SPAN
> upon error.</P
></DIV
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><H2
>See Also</H2
><P
><A
HREF="sdlcreatergbsurface.html"
><TT
CLASS="FUNCTION"
>SDL_CreateRGBSurface</TT
></A
>,
<A
HREF="sdlfreesurface.html"
><TT
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>SDL_FreeSurface</TT
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