在Linux / Xorg上设置颜色亮度

#include <X11/Xlib.h>
#include <X11/extensions/xf86vmode.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

int main() {
    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;
}@H_674_31@ 
 
这将伽马从0.25增加到4.0并返回,然后恢复原始伽玛.
 
 
或者你可以反复调用system(“xgAMMa -gAMMa％f”),结果几乎相同.