Mercurial > sdl-ios-xcode
view docs/html/sdlwmseticon.html @ 3880:74e828c64315 SDL-1.2
Fixed bug #292
I might be on crack here.
It looks like SDL_ConvertMono() in src/audio/SDL_audiocvt.c adds the left and
right channels of a stereo stream together, and clamps the new mono channel if
it would overflow.
Shouldn't it be dividing by 2 to average the two sample points instead of
clamping? Otherwise the mono sample point's volume doubles in the conversion.
This would also make the conversion faster, as it replaces two branches per
sample frame with a bitwise shift.
--ryan.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Sun, 24 Sep 2006 15:45:37 +0000 |
parents | 355632dca928 |
children |
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<HTML ><HEAD ><TITLE >SDL_WM_SetIcon</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="Window Management" HREF="wm.html"><LINK REL="PREVIOUS" TITLE="SDL_WM_GetCaption" HREF="sdlwmgetcaption.html"><LINK REL="NEXT" TITLE="SDL_WM_IconifyWindow" HREF="sdlwmiconifywindow.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="sdlwmgetcaption.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="sdlwmiconifywindow.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="SDLWMSETICON" ></A >SDL_WM_SetIcon</H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN3582" ></A ><H2 >Name</H2 >SDL_WM_SetIcon -- Sets the icon for the display window.</DIV ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN3585" ></A ><H2 >Synopsis</H2 ><DIV CLASS="FUNCSYNOPSIS" ><A NAME="AEN3586" ></A ><P ></P ><PRE CLASS="FUNCSYNOPSISINFO" >#include "SDL.h"</PRE ><P ><CODE ><CODE CLASS="FUNCDEF" >void <B CLASS="FSFUNC" >SDL_WM_SetIcon</B ></CODE >(SDL_Surface *icon, Uint8 *mask);</CODE ></P ><P ></P ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN3592" ></A ><H2 >Description</H2 ><P >Sets the icon for the display window. Win32 icons must be 32x32.</P ><P >This function must be called before the first call to <A HREF="sdlsetvideomode.html" >SDL_SetVideoMode</A >.</P ><P >The <TT CLASS="PARAMETER" ><I >mask</I ></TT > is a bitmask that describes the shape of the icon. If <TT CLASS="PARAMETER" ><I >mask</I ></TT > is NULL, then the shape is determined by the colorkey of <TT CLASS="PARAMETER" ><I >icon</I ></TT >, if any, or makes the icon rectangular (no transparency) otherwise.</P ><P >If <TT CLASS="PARAMETER" ><I >mask</I ></TT > is non-NULL, it points to a bitmap with bits set where the corresponding pixel should be visible. The format of the bitmap is as follows: Scanlines come in the usual top-down order. Each scanline consists of (width / 8) bytes, rounded up. The most significant bit of each byte represents the leftmost pixel.</P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN3603" ></A ><H2 >Example</H2 ><PRE CLASS="PROGRAMLISTING" >SDL_WM_SetIcon(SDL_LoadBMP("icon.bmp"), NULL);</PRE ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN3606" ></A ><H2 >See Also</H2 ><P ><A HREF="sdlsetvideomode.html" ><TT CLASS="FUNCTION" >SDL_SetVideoMode</TT ></A >, <A HREF="sdlwmsetcaption.html" ><TT CLASS="FUNCTION" >SDL_WM_SetCaption</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="sdlwmgetcaption.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="sdlwmiconifywindow.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >SDL_WM_GetCaption</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="wm.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >SDL_WM_IconifyWindow</TD ></TR ></TABLE ></DIV ></BODY ></HTML >