@Override
protected final Buffer getGammaRamp(final NativeSurface surface) {
final long display = surface.getDisplayHandle();
if (0 == display) {
return null;
}
final int screenIdx = surface.getScreenIndex();
final int size = getGammaRampLength(surface);
final ShortBuffer rampData = Buffers.newDirectShortBuffer(3 * size);
final ShortBuffer redRampData = Buffers.slice(rampData, 0 * size, size);
final ShortBuffer greenRampData = Buffers.slice(rampData, 1 * size, size);
final ShortBuffer blueRampData = Buffers.slice(rampData, 2 * size, size);
final boolean res =
X11Lib.XF86VidModeGetGammaRamp(
display, screenIdx, size, redRampData, greenRampData, blueRampData);
if (!res) {
return null;
}
if (DEBUG) {
dumpRamp("GET__", size, redRampData, greenRampData, blueRampData);
}
return rampData;
}
@Override
protected final void resetGammaRamp(final NativeSurface surface, final Buffer originalGammaRamp) {
if (originalGammaRamp == null) {
return; // getGammaRamp failed originally
}
final long display = surface.getDisplayHandle();
if (0 == display) {
return;
}
final int screenIdx = surface.getScreenIndex();
resetGammaRamp(display, screenIdx, originalGammaRamp);
}
@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;
}
@Override
protected final boolean setGammaRamp(final NativeSurface surface, final float[] ramp) {
final long display = surface.getDisplayHandle();
if (0 == display) {
return false;
}
final int screenIdx = surface.getScreenIndex();
final int len = ramp.length;
final short[] rampData = new short[len];
for (int i = 0; i < len; i++) {
rampData[i] = (short) (ramp[i] * 65535);
}
final boolean res =
X11Lib.XF86VidModeSetGammaRamp(
display, screenIdx, rampData.length, rampData, 0, rampData, 0, rampData, 0);
if (DEBUG) {
dumpRamp("SET__", rampData.length, rampData, rampData, rampData);
}
return res;
}