Привет, я нахожу в Интернете этот открытый исходный код от Алекса Якобсона
- (void) set_brightness:(float) new_brightness {
CGDirectDisplayID display[kMaxDisplays];
CGDisplayCount numDisplays;
CGDisplayErr err;
err = CGGetActiveDisplayList(kMaxDisplays, display, &numDisplays);
if (err != CGDisplayNoErr)
printf("cannot get list of displays (error %d)\n",err);
for (CGDisplayCount i = 0; i < numDisplays; ++i) {
CGDirectDisplayID dspy = display[i];
CFDictionaryRef originalMode = CGDisplayCurrentMode(dspy);
if (originalMode == NULL)
continue;
io_service_t service = CGDisplayIOServicePort(dspy);
float brightness;
err= IODisplayGetFloatParameter(service, kNilOptions, kDisplayBrightness,
&brightness);
if (err != kIOReturnSuccess) {
fprintf(stderr,
"failed to get brightness of display 0x%x (error %d)",
(unsigned int)dspy, err);
continue;
}
err = IODisplaySetFloatParameter(service, kNilOptions, kDisplayBrightness,
new_brightness);
if (err != kIOReturnSuccess) {
fprintf(stderr,
"Failed to set brightness of display 0x%x (error %d)",
(unsigned int)dspy, err);
continue;
}
}
}