@Override
protected final void resetGammaRamp(Buffer originalGammaRamp) {
if (originalGammaRamp == null) {
return; // getGammaRamp failed originally
}
long display = getOrCreateSharedDpy(defaultDevice);
if (0 == display) {
return;
}
ShortBuffer rampData = (ShortBuffer) originalGammaRamp;
int capacity = rampData.capacity();
if ((capacity % 3) != 0) {
throw new IllegalArgumentException("Must not be the original gamma ramp");
}
int size = capacity / 3;
rampData.position(0);
rampData.limit(size);
ShortBuffer redRampData = rampData.slice();
rampData.position(size);
rampData.limit(2 * size);
ShortBuffer greenRampData = rampData.slice();
rampData.position(2 * size);
rampData.limit(3 * size);
ShortBuffer blueRampData = rampData.slice();
X11Lib.XF86VidModeSetGammaRamp(
display, X11Lib.DefaultScreen(display), size, redRampData, greenRampData, blueRampData);
}
@Override
protected final boolean setGammaRamp(float[] ramp) {
long display = getOrCreateSharedDpy(defaultDevice);
if (0 == display) {
return false;
}
int len = ramp.length;
short[] rampData = new short[len];
for (int i = 0; i < len; i++) {
rampData[i] = (short) (ramp[i] * 65535);
}
boolean res =
X11Lib.XF86VidModeSetGammaRamp(
display,
X11Lib.DefaultScreen(display),
rampData.length,
rampData,
0,
rampData,
0,
rampData,
0);
return res;
}
@Override
protected final Buffer getGammaRamp() {
long display = getOrCreateSharedDpy(defaultDevice);
if (0 == display) {
return null;
}
int size = getGammaRampLength();
ShortBuffer rampData = ShortBuffer.wrap(new short[3 * size]);
rampData.position(0);
rampData.limit(size);
ShortBuffer redRampData = rampData.slice();
rampData.position(size);
rampData.limit(2 * size);
ShortBuffer greenRampData = rampData.slice();
rampData.position(2 * size);
rampData.limit(3 * size);
ShortBuffer blueRampData = rampData.slice();
boolean res =
X11Lib.XF86VidModeGetGammaRamp(
display, X11Lib.DefaultScreen(display), size, redRampData, greenRampData, blueRampData);
if (!res) {
return null;
}
return rampData;
}
@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;
}
