@Override
protected final synchronized int getGammaRampLength() {
if (gotGammaRampLength) {
return gammaRampLength;
}
long display = getOrCreateSharedDpy(defaultDevice);
if (0 == display) {
return 0;
}
int[] size = new int[1];
boolean res =
X11Lib.XF86VidModeGetGammaRampSize(display, X11Lib.DefaultScreen(display), size, 0);
if (!res) {
return 0;
}
gotGammaRampLength = true;
gammaRampLength = size[0];
return gammaRampLength;
}
@Override
protected final synchronized int getGammaRampLength(final NativeSurface surface) {
if (gotGammaRampLength) {
return gammaRampLength;
}
final long display = surface.getDisplayHandle();
if (0 == display) {
return 0;
}
final int screenIdx = surface.getScreenIndex();
final int[] size = new int[1];
final boolean res = X11Lib.XF86VidModeGetGammaRampSize(display, screenIdx, size, 0);
if (!res) {
return 0;
}
gotGammaRampLength = true;
gammaRampLength = size[0];
System.err.println("XXX: Gamma ramp size: " + gammaRampLength);
return gammaRampLength;
}