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+<HTML
+><HEAD
+><TITLE
+>SDL_SetColorKey</TITLE
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+>SDL Library Documentation</TH
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+>Next</A
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+><HR
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+WIDTH="100%"></DIV
+><H1
+><A
+NAME="SDLSETCOLORKEY"
+></A
+>SDL_SetColorKey</H1
+><DIV
+CLASS="REFNAMEDIV"
+><A
+NAME="AEN2045"
+></A
+><H2
+>Name</H2
+>SDL_SetColorKey&nbsp;--&nbsp;Sets the color key (transparent pixel) in a blittable surface and
+RLE acceleration.</DIV
+><DIV
+CLASS="REFSYNOPSISDIV"
+><A
+NAME="AEN2048"
+></A
+><H2
+>Synopsis</H2
+><DIV
+CLASS="FUNCSYNOPSIS"
+><A
+NAME="AEN2049"
+></A
+><P
+></P
+><PRE
+CLASS="FUNCSYNOPSISINFO"
+>#include "SDL.h"</PRE
+><P
+><CODE
+><CODE
+CLASS="FUNCDEF"
+>int <B
+CLASS="FSFUNC"
+>SDL_SetColorKey</B
+></CODE
+>(SDL_Surface *surface, Uint32 flag, Uint32 key);</CODE
+></P
+><P
+></P
+></DIV
+></DIV
+><DIV
+CLASS="REFSECT1"
+><A
+NAME="AEN2055"
+></A
+><H2
+>Description</H2
+><P
+> Sets the color key (transparent pixel) in a blittable surface and enables or
+ disables RLE blit acceleration.</P
+><P
+>RLE acceleration can substantially speed up blitting of images with large
+horizontal runs of transparent pixels (i.e., pixels that match the
+<TT
+CLASS="PARAMETER"
+><I
+>key</I
+></TT
+> value). The <TT
+CLASS="PARAMETER"
+><I
+>key</I
+></TT
+> must be of the same pixel format as the <TT
+CLASS="PARAMETER"
+><I
+>surface</I
+></TT
+>, <A
+HREF="sdlmaprgb.html"
+><TT
+CLASS="FUNCTION"
+>SDL_MapRGB</TT
+></A
+> is often useful for obtaining an acceptable value.</P
+><P
+>If <TT
+CLASS="PARAMETER"
+><I
+>flag</I
+></TT
+> is <TT
+CLASS="LITERAL"
+>SDL_SRCCOLORKEY</TT
+> then
+<TT
+CLASS="PARAMETER"
+><I
+>key</I
+></TT
+> is the transparent pixel value in the source image of a
+blit.</P
+><P
+>If <TT
+CLASS="PARAMETER"
+><I
+>flag</I
+></TT
+> is OR'd with
+<TT
+CLASS="LITERAL"
+>SDL_RLEACCEL</TT
+> then the surface will be draw using RLE
+acceleration when drawn with
+<A
+HREF="sdlblitsurface.html"
+>SDL_BlitSurface</A
+>. The surface will
+actually be encoded for RLE acceleration the first time
+<A
+HREF="sdlblitsurface.html"
+>SDL_BlitSurface</A
+> or
+<A
+HREF="sdldisplayformat.html"
+>SDL_DisplayFormat</A
+> is called on the
+surface.</P
+><P
+>If <TT
+CLASS="PARAMETER"
+><I
+>flag</I
+></TT
+> is 0, this function clears
+any current color key.</P
+></DIV
+><DIV
+CLASS="REFSECT1"
+><A
+NAME="AEN2076"
+></A
+><H2
+>Return Value</H2
+><P
+>This function returns <SPAN
+CLASS="RETURNVALUE"
+>0</SPAN
+>, or
+<SPAN
+CLASS="RETURNVALUE"
+>-1</SPAN
+> if there was an error.</P
+></DIV
+><DIV
+CLASS="REFSECT1"
+><A
+NAME="AEN2081"
+></A
+><H2
+>See Also</H2
+><P
+><A
+HREF="sdlblitsurface.html"
+><TT
+CLASS="FUNCTION"
+>SDL_BlitSurface</TT
+></A
+>,
+<A
+HREF="sdldisplayformat.html"
+><TT
+CLASS="FUNCTION"
+>SDL_DisplayFormat</TT
+></A
+>,
+<A
+HREF="sdlmaprgb.html"
+><TT
+CLASS="FUNCTION"
+>SDL_MapRGB</TT
+></A
+>,
+<A
+HREF="sdlsetalpha.html"
+><TT
+CLASS="FUNCTION"
+>SDL_SetAlpha</TT
+></A
+></P
+></DIV
+><DIV
+CLASS="NAVFOOTER"
+><HR
+ALIGN="LEFT"
+WIDTH="100%"><TABLE
+SUMMARY="Footer navigation table"
+WIDTH="100%"
+BORDER="0"
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+CELLSPACING="0"
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+WIDTH="33%"
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+VALIGN="top"
+><A
+HREF="sdlsavebmp.html"
+ACCESSKEY="P"
+>Prev</A
+></TD
+><TD
+WIDTH="34%"
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+VALIGN="top"
+><A
+HREF="index.html"
+ACCESSKEY="H"
+>Home</A
+></TD
+><TD
+WIDTH="33%"
+ALIGN="right"
+VALIGN="top"
+><A
+HREF="sdlsetalpha.html"
+ACCESSKEY="N"
+>Next</A
+></TD
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+><TR
+><TD
+WIDTH="33%"
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+>SDL_SaveBMP</TD
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+>Up</A
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+> \ No newline at end of file