Mercurial > sdl-ios-xcode
view docs/html/sdlsetcolors.html @ 4170:092c0bc69155 SDL-1.2
Fixed bug #618
Description From Tim Angus 2008-08-30 12:23:56 (-) [reply]
As we all know SDL 1.2 doesn't handle dead keys well since one key press
potentially equals two (or more) characters. For example, on many layouts,
keying <backquote>,<space> results in <no character>,<backquote><space>. Since
the unicode member of the SDL_keysym struct only has room for one character,
only one can be returned.
On Linux, the first character is returned. On Windows however, unless the exact
number of characters generated by the keypress is 1, nothing is returned. The
following patch addresses this inconsistency.
Updated patch which includes a further fix to the handling of the numpad when
numlock is on. This further fix is courtesy Amanieu d'Antras.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Mon, 13 Apr 2009 08:42:09 +0000 |
parents | 355632dca928 |
children |
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<HTML ><HEAD ><TITLE >SDL_SetColors</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_Flip" HREF="sdlflip.html"><LINK REL="NEXT" TITLE="SDL_SetPalette" HREF="sdlsetpalette.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="sdlflip.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="sdlsetpalette.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="SDLSETCOLORS" ></A >SDL_SetColors</H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN1462" ></A ><H2 >Name</H2 >SDL_SetColors -- Sets a portion of the colormap for the given 8-bit surface.</DIV ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN1465" ></A ><H2 >Synopsis</H2 ><DIV CLASS="FUNCSYNOPSIS" ><A NAME="AEN1466" ></A ><P ></P ><PRE CLASS="FUNCSYNOPSISINFO" >#include "SDL.h"</PRE ><P ><CODE ><CODE CLASS="FUNCDEF" >int <B CLASS="FSFUNC" >SDL_SetColors</B ></CODE >(SDL_Surface *surface, SDL_Color *colors, int firstcolor, int ncolors);</CODE ></P ><P ></P ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN1472" ></A ><H2 >Description</H2 ><P >Sets a portion of the colormap for the given 8-bit surface.</P ><P >When <TT CLASS="PARAMETER" ><I >surface</I ></TT > is the surface associated with the current display, the display colormap will be updated with the requested colors. If <TT CLASS="LITERAL" >SDL_HWPALETTE</TT > was set in <A HREF="sdlsetvideomode.html" >SDL_SetVideoMode</A > flags, <TT CLASS="FUNCTION" >SDL_SetColors</TT > will always return <SPAN CLASS="RETURNVALUE" >1</SPAN >, and the palette is guaranteed to be set the way you desire, even if the window colormap has to be warped or run under emulation.</P ><P >The color components of a <A HREF="sdlcolor.html" ><SPAN CLASS="STRUCTNAME" >SDL_Color</SPAN ></A > structure are 8-bits in size, giving you a total of 256<SUP >3</SUP > =16777216 colors.</P ><P >Palettized (8-bit) screen surfaces with the <TT CLASS="LITERAL" >SDL_HWPALETTE</TT > flag have two palettes, a logical palette that is used for mapping blits to/from the surface and a physical palette (that determines how the hardware will map the colors to the display). <TT CLASS="FUNCTION" >SDL_SetColors</TT > modifies both palettes (if present), and is equivalent to calling <A HREF="sdlsetpalette.html" >SDL_SetPalette</A > with the <TT CLASS="PARAMETER" ><I >flags</I ></TT > set to <TT CLASS="LITERAL" >(SDL_LOGPAL | SDL_PHYSPAL)</TT >.</P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN1491" ></A ><H2 >Return Value</H2 ><P >If <TT CLASS="PARAMETER" ><I >surface</I ></TT > is not a palettized surface, this function does nothing, returning <SPAN CLASS="RETURNVALUE" >0</SPAN >. If all of the colors were set as passed to <TT CLASS="FUNCTION" >SDL_SetColors</TT >, it will return <SPAN CLASS="RETURNVALUE" >1</SPAN >. If not all the color entries were set exactly as given, it will return <SPAN CLASS="RETURNVALUE" >0</SPAN >, and you should look at the surface palette to determine the actual color palette.</P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN1499" ></A ><H2 >Example</H2 ><PRE CLASS="PROGRAMLISTING" >/* Create a display surface with a grayscale palette */ SDL_Surface *screen; SDL_Color colors[256]; int i; . . . /* Fill colors with color information */ for(i=0;i<256;i++){ colors[i].r=i; colors[i].g=i; colors[i].b=i; } /* Create display */ screen=SDL_SetVideoMode(640, 480, 8, SDL_HWPALETTE); if(!screen){ printf("Couldn't set video mode: %s\n", SDL_GetError()); exit(-1); } /* Set palette */ SDL_SetColors(screen, colors, 0, 256); . . . .</PRE ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN1502" ></A ><H2 >See Also</H2 ><P ><A HREF="sdlcolor.html" ><SPAN CLASS="STRUCTNAME" >SDL_Color</SPAN ></A > <A HREF="sdlsurface.html" ><SPAN CLASS="STRUCTNAME" >SDL_Surface</SPAN ></A >, <A HREF="sdlsetpalette.html" ><TT CLASS="FUNCTION" >SDL_SetPalette</TT ></A >, <A HREF="sdlsetvideomode.html" ><TT CLASS="FUNCTION" >SDL_SetVideoMode</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="sdlflip.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="sdlsetpalette.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >SDL_Flip</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_SetPalette</TD ></TR ></TABLE ></DIV ></BODY ></HTML >