最佳答案
使用XF86VidMode*系列功能.
#include dio.h>
#include display *display;
int screen;
int major,minor;
int i;
XF86VidModeGamma orig;
display = XOpendisplay(NULL);
if (!display) return -1;
screen = DefaultScreen(display);
if (!XF86VidModeQueryVersion(display,&major,&minor)
|| major < 2 || major == 2 && minor < 0
|| !XF86VidModeGetGamma(display,screen,&orig)) {
XClosedisplay(display);
return -1;
}
for (i = 0; i <= 32; i++) {
XF86VidModeGamma gamma;
gamma.red = exp2f(2 - fabs(i - 16) / 4);
gamma.green = gamma.red;
gamma.blue = gamma.red;
if (!XF86VidModeSetGamma(display,&gamma)) break;
printf("gamma: %f %f %f",gamma.red,gamma.green,gamma.blue);
if (!XF86VidModeGetGamma(display,&gamma)) break;
printf(" -> %f %f %f\n",gamma.blue);
sleep(1);
}
XF86VidModeSetGamma(display,&orig);
XF86VidModeGetGamma(display,&orig);
XClosedisplay(display);
return 0;
}
这将伽马从0.25增加到4.0并返回,然后恢复原始伽玛.