view docs/html/sdlenableunicode.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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>SDL_EnableUNICODE</TITLE
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>SDL_EnableUNICODE</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN5805"
></A
><H2
>Name</H2
>SDL_EnableUNICODE&nbsp;--&nbsp;Enable UNICODE translation</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
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></A
><H2
>Synopsis</H2
><DIV
CLASS="FUNCSYNOPSIS"
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><P
></P
><PRE
CLASS="FUNCSYNOPSISINFO"
>#include "SDL.h"</PRE
><P
><CODE
><CODE
CLASS="FUNCDEF"
>int <B
CLASS="FSFUNC"
>SDL_EnableUNICODE</B
></CODE
>(int enable);</CODE
></P
><P
></P
></DIV
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><DIV
CLASS="REFSECT1"
><A
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></A
><H2
>Description</H2
><P
>Enables/Disables Unicode keyboard translation.</P
><P
>To obtain the character codes corresponding to received keyboard events,
Unicode translation must first be turned on using this function. The
translation incurs a slight overhead for each keyboard event and is therefore
disabled by default. For each subsequently received key down event, the
<TT
CLASS="STRUCTFIELD"
><I
>unicode</I
></TT
> member of the
<A
HREF="sdlkeysym.html"
><SPAN
CLASS="STRUCTNAME"
>SDL_keysym</SPAN
></A
> structure
will then contain the corresponding character code, or zero for keysyms that do
not correspond to any character code.</P
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>A value of 1 for <TT
CLASS="PARAMETER"
><I
>enable</I
></TT
> enables Unicode translation;
0 disables it, and -1 leaves it unchanged (useful for querying the current
translation mode).</P
><P
>Note that only key press events will be translated, not release events.</P
></DIV
><DIV
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><A
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></A
><H2
>Return Value</H2
><P
>Returns the previous translation mode (<SPAN
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>0</SPAN
> or <SPAN
CLASS="RETURNVALUE"
>1</SPAN
>).</P
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