Mercurial > sdl-ios-xcode
view docs/html/sdlcreatergbsurfacefrom.html @ 2787:93764fe8601a
It turns out both the software and the OpenGL renderer had the same problem.
According to the spec, when SDL_SRCALPHA is set, the colorkey is ignored, so
we just need to convert the colorkey into the alpha channel.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Tue, 25 Nov 2008 05:29:14 +0000 |
parents | 355632dca928 |
children |
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<HTML ><HEAD ><TITLE >SDL_CreateRGBSurfaceFrom</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ "><LINK REL="HOME" TITLE="SDL Library Documentation" HREF="index.html"><LINK REL="UP" TITLE="Video" HREF="video.html"><LINK REL="PREVIOUS" TITLE="SDL_CreateRGBSurface" HREF="sdlcreatergbsurface.html"><LINK REL="NEXT" TITLE="SDL_FreeSurface" HREF="sdlfreesurface.html"></HEAD ><BODY CLASS="REFENTRY" BGCOLOR="#FFF8DC" TEXT="#000000" LINK="#0000ee" VLINK="#551a8b" ALINK="#ff0000" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >SDL Library Documentation</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="sdlcreatergbsurface.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="sdlfreesurface.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="SDLCREATERGBSURFACEFROM" ></A >SDL_CreateRGBSurfaceFrom</H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN1856" ></A ><H2 >Name</H2 >SDL_CreateRGBSurfaceFrom -- Create an SDL_Surface from pixel data</DIV ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN1859" ></A ><H2 >Synopsis</H2 ><DIV CLASS="FUNCSYNOPSIS" ><A NAME="AEN1860" ></A ><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 ><P ></P ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN1866" ></A ><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 ><DIV CLASS="REFSECT1" ><A NAME="AEN1882" ></A ><H2 >See Also</H2 ><P ><A HREF="sdlcreatergbsurface.html" ><TT CLASS="FUNCTION" >SDL_CreateRGBSurface</TT ></A >, <A HREF="sdlfreesurface.html" ><TT CLASS="FUNCTION" >SDL_FreeSurface</TT ></A ></P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="sdlcreatergbsurface.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="sdlfreesurface.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >SDL_CreateRGBSurface</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="video.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >SDL_FreeSurface</TD ></TR ></TABLE ></DIV ></BODY ></HTML >