@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;
}
