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| >SDL_SetGamma</H1 |
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| >Name</H2 |
| >SDL_SetGamma -- Sets the color gamma function for the display</DIV |
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| ><PRE |
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| >#include "SDL.h"</PRE |
| ><P |
| ><CODE |
| ><CODE |
| CLASS="FUNCDEF" |
| >int <B |
| CLASS="FSFUNC" |
| >SDL_SetGamma</B |
| ></CODE |
| >(float redgamma, float greengamma, float bluegamma);</CODE |
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| >Description</H2 |
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| >Sets the "gamma function" for the display of each color component. Gamma |
| controls the brightness/contrast of colors displayed on the screen. |
| A gamma value of <TT |
| CLASS="CONSTANT" |
| >1.0</TT |
| > is identity (i.e., no adjustment |
| is made).</P |
| ><P |
| >This function adjusts the gamma based on the "gamma function" parameter, |
| you can directly specify lookup tables for gamma adjustment with |
| <A |
| HREF="sdlsetgammaramp.html" |
| >SDL_SetGammaRamp</A |
| >.</P |
| ><P |
| >Not all display hardware is able to change gamma.</P |
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| >Return Value</H2 |
| ><P |
| >Returns -1 on error (or if gamma adjustment is not supported).</P |
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| >See Also</H2 |
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| HREF="sdlgetgammaramp.html" |
| >SDL_GetGammaRamp</A |
| > |
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| HREF="sdlsetgammaramp.html" |
| >SDL_SetGammaRamp</A |
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