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The core pointer is comprised of merging the inputs of all mice. If there are other mice, they should show up in the device list, and we want to report events from those devices instead of the core events. However, if XInput isn't supported or we can't find other mice in the device list, we'll add the core pointer and interpret normal mouse events.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 04 Jan 2009 18:29:20 +0000
parents 355632dca928
children
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<HTML
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>SDL_SetGammaRamp</TITLE
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><H1
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>SDL_SetGammaRamp</H1
><DIV
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><A
NAME="AEN1624"
></A
><H2
>Name</H2
>SDL_SetGammaRamp&nbsp;--&nbsp;Sets the color gamma lookup tables for the display</DIV
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CLASS="REFSYNOPSISDIV"
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><H2
>Synopsis</H2
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><P
></P
><PRE
CLASS="FUNCSYNOPSISINFO"
>#include "SDL.h"</PRE
><P
><CODE
><CODE
CLASS="FUNCDEF"
>int <B
CLASS="FSFUNC"
>SDL_SetGammaRamp</B
></CODE
>(Uint16 *redtable, Uint16 *greentable, Uint16 *bluetable);</CODE
></P
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><H2
>Description</H2
><P
>Sets the gamma lookup tables for the display for each color component.
Each table is an array of 256 Uint16 values, representing a mapping
between the input and output for that channel. The input is the index
into the array, and the output is the 16-bit gamma value at that index,
scaled to the output color precision. You may pass NULL to any of the
channels to leave them unchanged.</P
><P
>This function adjusts the gamma based on lookup tables, you can also
have the gamma calculated based on a "gamma function" parameter with
<A
HREF="sdlsetgamma.html"
>SDL_SetGamma</A
>.</P
><P
>Not all display hardware is able to change gamma.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
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><H2
>Return Value</H2
><P
>Returns -1 on error (or if gamma adjustment is not supported).</P
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></A
><H2
>See Also</H2
><P
><A
HREF="sdlsetgamma.html"
>SDL_SetGamma</A
>
<A
HREF="sdlgetgammaramp.html"
>SDL_GetGammaRamp</A
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