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Diffstat (limited to 'distrib/sdl-1.2.15/docs/man3/SDL_SetGammaRamp.3')
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diff --git a/distrib/sdl-1.2.15/docs/man3/SDL_SetGammaRamp.3 b/distrib/sdl-1.2.15/docs/man3/SDL_SetGammaRamp.3 new file mode 100644 index 0000000..52bf9f5 --- /dev/null +++ b/distrib/sdl-1.2.15/docs/man3/SDL_SetGammaRamp.3 @@ -0,0 +1,22 @@ +.TH "SDL_SetGammaRamp" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" +.SH "NAME" +SDL_SetGammaRamp \- Sets the color gamma lookup tables for the display +.SH "SYNOPSIS" +.PP +\fB#include "SDL\&.h" +.sp +\fBint \fBSDL_SetGammaRamp\fP\fR(\fBUint16 *redtable, Uint16 *greentable, Uint16 *bluetable\fR); +.SH "DESCRIPTION" +.PP +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\&. +.PP +This function adjusts the gamma based on lookup tables, you can also have the gamma calculated based on a "gamma function" parameter with \fISDL_SetGamma\fR\&. +.PP +Not all display hardware is able to change gamma\&. +.SH "RETURN VALUE" +.PP +Returns -1 on error (or if gamma adjustment is not supported)\&. +.SH "SEE ALSO" +.PP +\fISDL_SetGamma\fR \fISDL_GetGammaRamp\fR +.\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01 |