Mercurial > sdl-ios-xcode
comparison docs/man3/SDL_SetGamma.3 @ 0:74212992fb08
Initial revision
| author | Sam Lantinga <slouken@lokigames.com> |
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| date | Thu, 26 Apr 2001 16:45:43 +0000 |
| parents | |
| children | 55f1f1b3e27d |
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| -1:000000000000 | 0:74212992fb08 |
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| 1 .TH "SDL_SetGamma" "3" "Mon 12 Mar 2001, 01:04" "SDL" "SDL API Reference" | |
| 2 .SH "NAME" | |
| 3 SDL_SetGamma\- Sets the color gamma function for the display | |
| 4 .SH "SYNOPSIS" | |
| 5 .PP | |
| 6 \fB#include "SDL\&.h" | |
| 7 .sp | |
| 8 \fBint \fBSDL_SetGamma\fP\fR(\fBfloat redgamma, float greengamma, float bluegamma\fR); | |
| 9 .SH "DESCRIPTION" | |
| 10 .PP | |
| 11 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 1\&.0 is identity (i\&.e\&., no adjustment is made)\&. | |
| 12 .PP | |
| 13 This function adjusts the gamma based on the "gamma function" parameter, you can directly specify lookup tables for gamma adjustment with \fISDL_SetGammaRamp\fR\&. | |
| 14 .PP | |
| 15 Not all display hardware is able to change gamma\&. | |
| 16 .SH "RETURN VALUE" | |
| 17 .PP | |
| 18 Returns -1 on error (or if gamma adjustment is not supported)\&. | |
| 19 .SH "SEE ALSO" | |
| 20 .PP | |
| 21 \fISDL_GetGammaRamp\fR \fISDL_SetGammaRamp\fR | |
| 22 ...\" created by instant / docbook-to-man, Mon 12 Mar 2001, 01:04 |