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Java™ Binding for the OpenGL® API
/*
* Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
* Copyright (c) 2010 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
* INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
* MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
* ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
* DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
* ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
* DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
* DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
* ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
* SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed or intended for use
* in the design, construction, operation or maintenance of any nuclear
* facility.
*/
package jogamp.opengl.x11.glx;
import java.nio.Buffer;
import java.nio.ShortBuffer;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import javax.media.nativewindow.AbstractGraphicsConfiguration;
import javax.media.nativewindow.AbstractGraphicsDevice;
import javax.media.nativewindow.AbstractGraphicsScreen;
import javax.media.nativewindow.NativeSurface;
import javax.media.nativewindow.ProxySurface;
import javax.media.nativewindow.UpstreamSurfaceHook;
import javax.media.nativewindow.VisualIDHolder;
import javax.media.opengl.GLCapabilities;
import javax.media.opengl.GLCapabilitiesChooser;
import javax.media.opengl.GLCapabilitiesImmutable;
import javax.media.opengl.GLContext;
import javax.media.opengl.GLDrawable;
import javax.media.opengl.GLException;
import javax.media.opengl.GLProfile;
import jogamp.nativewindow.WrappedSurface;
import jogamp.nativewindow.x11.X11DummyUpstreamSurfaceHook;
import jogamp.nativewindow.x11.X11Lib;
import jogamp.nativewindow.x11.X11Util;
import jogamp.opengl.DesktopGLDynamicLookupHelper;
import jogamp.opengl.GLContextImpl;
import jogamp.opengl.GLDrawableFactoryImpl;
import jogamp.opengl.GLDrawableImpl;
import jogamp.opengl.GLDynamicLookupHelper;
import jogamp.opengl.GLGraphicsConfigurationUtil;
import jogamp.opengl.SharedResourceRunner;
import com.jogamp.common.util.VersionNumber;
import com.jogamp.nativewindow.x11.X11GraphicsDevice;
import com.jogamp.nativewindow.x11.X11GraphicsScreen;
import com.jogamp.opengl.GLRendererQuirks;
public class X11GLXDrawableFactory extends GLDrawableFactoryImpl {
public static final VersionNumber versionOneZero = new VersionNumber(1, 0, 0);
public static final VersionNumber versionOneOne = new VersionNumber(1, 1, 0);
public static final VersionNumber versionOneTwo = new VersionNumber(1, 2, 0);
public static final VersionNumber versionOneThree = new VersionNumber(1, 3, 0);
public static final VersionNumber versionOneFour = new VersionNumber(1, 4, 0);
static final String GLX_SGIX_pbuffer = "GLX_SGIX_pbuffer";
private static DesktopGLDynamicLookupHelper x11GLXDynamicLookupHelper = null;
public X11GLXDrawableFactory() {
super();
synchronized(X11GLXDrawableFactory.class) {
if( null == x11GLXDynamicLookupHelper ) {
x11GLXDynamicLookupHelper = AccessController.doPrivileged(new PrivilegedAction() {
public DesktopGLDynamicLookupHelper run() {
DesktopGLDynamicLookupHelper tmp;
try {
tmp = new DesktopGLDynamicLookupHelper(new X11GLXDynamicLibraryBundleInfo());
if(null!=tmp && tmp.isLibComplete()) {
GLX.getGLXProcAddressTable().reset(tmp);
}
} catch (Exception ex) {
tmp = null;
if(DEBUG) {
ex.printStackTrace();
}
}
return tmp;
}
} );
}
}
defaultDevice = new X11GraphicsDevice(X11Util.getNullDisplayName(), AbstractGraphicsDevice.DEFAULT_UNIT);
if(null!=x11GLXDynamicLookupHelper) {
// Register our GraphicsConfigurationFactory implementations
// The act of constructing them causes them to be registered
X11GLXGraphicsConfigurationFactory.registerFactory();
sharedMap = new HashMap();
// Init shared resources off thread
// Will be released via ShutdownHook
sharedResourceRunner = new SharedResourceRunner(new SharedResourceImplementation());
sharedResourceRunner.start();
}
}
@Override
protected final boolean isComplete() {
return null != x11GLXDynamicLookupHelper;
}
@Override
protected final void destroy() {
if(null != sharedResourceRunner) {
sharedResourceRunner.stop();
sharedResourceRunner = null;
}
if(null != sharedMap) {
sharedMap.clear();
sharedMap = null;
}
defaultDevice = null;
/**
* Pulling away the native library may cause havoc ..
*
x11GLXDynamicLookupHelper.destroy();
*/
x11GLXDynamicLookupHelper = null;
}
@Override
public final GLDynamicLookupHelper getGLDynamicLookupHelper(int profile) {
return x11GLXDynamicLookupHelper;
}
private X11GraphicsDevice defaultDevice;
private SharedResourceRunner sharedResourceRunner;
private HashMap sharedMap;
static class SharedResource implements SharedResourceRunner.Resource {
private final String glXServerVendorName;
private final boolean isGLXServerVendorATI;
private final boolean isGLXServerVendorNVIDIA;
private final VersionNumber glXServerVersion;
private final boolean glXServerVersionOneOneCapable;
private final boolean glXServerVersionOneThreeCapable;
private final boolean glXMultisampleAvailable;
X11GraphicsDevice device;
X11GraphicsScreen screen;
GLDrawableImpl drawable;
GLContextImpl context;
SharedResource(X11GraphicsDevice dev, X11GraphicsScreen scrn,
GLDrawableImpl draw, GLContextImpl ctx,
VersionNumber glXServerVer, String glXServerVendor, boolean glXServerMultisampleAvail) {
device = dev;
screen = scrn;
drawable = draw;
context = ctx;
glXServerVersion = glXServerVer;
glXServerVersionOneOneCapable = glXServerVersion.compareTo(versionOneOne) >= 0 ;
glXServerVersionOneThreeCapable = glXServerVersion.compareTo(versionOneThree) >= 0 ;
glXServerVendorName = glXServerVendor;
isGLXServerVendorATI = GLXUtil.isVendorATI(glXServerVendorName);
isGLXServerVendorNVIDIA = GLXUtil.isVendorNVIDIA(glXServerVendorName);
glXMultisampleAvailable = glXServerMultisampleAvail;
}
@Override
public final boolean isValid() {
return null != context;
}
@Override
final public AbstractGraphicsDevice getDevice() { return device; }
@Override
final public AbstractGraphicsScreen getScreen() { return screen; }
@Override
final public GLDrawableImpl getDrawable() { return drawable; }
@Override
final public GLContextImpl getContext() { return context; }
@Override
public GLRendererQuirks getRendererQuirks() {
return null != context ? context.getRendererQuirks() : null;
}
final String getGLXVendorName() { return glXServerVendorName; }
final boolean isGLXVendorATI() { return isGLXServerVendorATI; }
final boolean isGLXVendorNVIDIA() { return isGLXServerVendorNVIDIA; }
final VersionNumber getGLXVersion() { return glXServerVersion; }
final boolean isGLXVersionGreaterEqualOneOne() { return glXServerVersionOneOneCapable; }
final boolean isGLXVersionGreaterEqualOneThree() { return glXServerVersionOneThreeCapable; }
final boolean isGLXMultisampleAvailable() { return glXMultisampleAvailable; }
}
class SharedResourceImplementation implements SharedResourceRunner.Implementation {
@Override
public void clear() {
synchronized(sharedMap) {
sharedMap.clear();
}
}
@Override
public SharedResourceRunner.Resource mapPut(String connection, SharedResourceRunner.Resource resource) {
synchronized(sharedMap) {
return sharedMap.put(connection, resource);
}
}
@Override
public SharedResourceRunner.Resource mapGet(String connection) {
synchronized(sharedMap) {
return sharedMap.get(connection);
}
}
@Override
public Collection mapValues() {
synchronized(sharedMap) {
return sharedMap.values();
}
}
@Override
public boolean isDeviceSupported(String connection) {
final boolean res;
final X11GraphicsDevice x11Device = new X11GraphicsDevice(X11Util.openDisplay(connection), AbstractGraphicsDevice.DEFAULT_UNIT, true /* owner */);
x11Device.lock();
try {
res = GLXUtil.isGLXAvailableOnServer(x11Device);
} finally {
x11Device.unlock();
x11Device.close();
}
if(DEBUG) {
System.err.println("GLX "+(res ? "is" : "not")+" available on device/server: "+x11Device);
}
return res;
}
@Override
public SharedResourceRunner.Resource createSharedResource(String connection) {
final X11GraphicsDevice sharedDevice = new X11GraphicsDevice(X11Util.openDisplay(connection), AbstractGraphicsDevice.DEFAULT_UNIT, true /* owner */);
sharedDevice.lock();
try {
final X11GraphicsScreen sharedScreen = new X11GraphicsScreen(sharedDevice, sharedDevice.getDefaultScreen());
GLXUtil.initGLXClientDataSingleton(sharedDevice);
final String glXServerVendorName = GLX.glXQueryServerString(sharedDevice.getHandle(), 0, GLX.GLX_VENDOR);
final boolean glXServerMultisampleAvailable = GLXUtil.isMultisampleAvailable(GLX.glXQueryServerString(sharedDevice.getHandle(), 0, GLX.GLX_EXTENSIONS));
final GLProfile glp = GLProfile.get(sharedDevice, GLProfile.GL_PROFILE_LIST_MIN_DESKTOP, false);
if (null == glp) {
throw new GLException("Couldn't get default GLProfile for device: "+sharedDevice);
}
final GLCapabilitiesImmutable caps = new GLCapabilities(glp);
final GLDrawableImpl sharedDrawable = createOnscreenDrawableImpl(createDummySurfaceImpl(sharedDevice, false, caps, caps, null, 64, 64));
sharedDrawable.setRealized(true);
final X11GLCapabilities chosenCaps = (X11GLCapabilities) sharedDrawable.getChosenGLCapabilities();
final boolean glxForcedOneOne = !chosenCaps.hasFBConfig();
final VersionNumber glXServerVersion;
if( glxForcedOneOne ) {
glXServerVersion = versionOneOne;
} else {
glXServerVersion = GLXUtil.getGLXServerVersionNumber(sharedDevice);
}
final GLContextImpl sharedContext = (GLContextImpl) sharedDrawable.createContext(null);
if (null == sharedContext) {
throw new GLException("Couldn't create shared context for drawable: "+sharedDrawable);
}
boolean madeCurrent = false;
sharedContext.makeCurrent();
try {
madeCurrent = sharedContext.isCurrent();
} finally {
sharedContext.release();
}
if( sharedContext.hasRendererQuirk( GLRendererQuirks.DontCloseX11Display ) ) {
X11Util.markAllDisplaysUnclosable();
}
if (DEBUG) {
System.err.println("SharedDevice: " + sharedDevice);
System.err.println("SharedScreen: " + sharedScreen);
System.err.println("SharedContext: " + sharedContext + ", madeCurrent " + madeCurrent);
System.err.println("GLX Server Vendor: " + glXServerVendorName);
System.err.println("GLX Server Version: " + glXServerVersion + ", forced "+glxForcedOneOne);
System.err.println("GLX Server Multisample: " + glXServerMultisampleAvailable);
System.err.println("GLX Client Vendor: " + GLXUtil.getClientVendorName());
System.err.println("GLX Client Version: " + GLXUtil.getClientVersionNumber());
System.err.println("GLX Client Multisample: " + GLXUtil.isClientMultisampleAvailable());
}
return new SharedResource(sharedDevice, sharedScreen, sharedDrawable, sharedContext,
glXServerVersion, glXServerVendorName,
glXServerMultisampleAvailable && GLXUtil.isClientMultisampleAvailable());
} catch (Throwable t) {
throw new GLException("X11GLXDrawableFactory - Could not initialize shared resources for "+connection, t);
} finally {
sharedDevice.unlock();
}
}
@Override
public void releaseSharedResource(SharedResourceRunner.Resource shared) {
SharedResource sr = (SharedResource) shared;
if (DEBUG) {
System.err.println("Shutdown Shared:");
System.err.println("Device : " + sr.device);
System.err.println("Screen : " + sr.screen);
System.err.println("Drawable: " + sr.drawable);
System.err.println("CTX : " + sr.context);
Thread.dumpStack();
}
if (null != sr.context) {
// may cause JVM SIGSEGV:
sr.context.destroy(); // will also pull the dummy MutuableSurface
sr.context = null;
}
if (null != sr.drawable) {
// may cause JVM SIGSEGV:
sr.drawable.setRealized(false);
sr.drawable = null;
}
if (null != sr.screen) {
sr.screen = null;
}
if (null != sr.device) {
// may cause JVM SIGSEGV:
sr.device.close();
sr.device = null;
}
}
}
@Override
public final AbstractGraphicsDevice getDefaultDevice() {
return defaultDevice;
}
@Override
public final boolean getIsDeviceCompatible(AbstractGraphicsDevice device) {
if(null != x11GLXDynamicLookupHelper && device instanceof X11GraphicsDevice) {
return true;
}
return false;
}
@Override
protected final Thread getSharedResourceThread() {
return sharedResourceRunner.start();
}
@Override
protected final SharedResource getOrCreateSharedResourceImpl(AbstractGraphicsDevice device) {
return (SharedResource) sharedResourceRunner.getOrCreateShared(device);
}
protected final long getOrCreateSharedDpy(AbstractGraphicsDevice device) {
final SharedResourceRunner.Resource sr = getOrCreateSharedResource( device );
if(null!=sr) {
return sr.getDevice().getHandle();
}
return 0;
}
@Override
protected List getAvailableCapabilitiesImpl(AbstractGraphicsDevice device) {
return X11GLXGraphicsConfigurationFactory.getAvailableCapabilities(this, device);
}
@Override
protected final GLDrawableImpl createOnscreenDrawableImpl(NativeSurface target) {
if (target == null) {
throw new IllegalArgumentException("Null target");
}
return new X11OnscreenGLXDrawable(this, target, false);
}
@Override
protected final GLDrawableImpl createOffscreenDrawableImpl(NativeSurface target) {
if (target == null) {
throw new IllegalArgumentException("Null target");
}
AbstractGraphicsConfiguration config = target.getGraphicsConfiguration();
GLCapabilitiesImmutable caps = (GLCapabilitiesImmutable) config.getChosenCapabilities();
if(!caps.isPBuffer()) {
return new X11PixmapGLXDrawable(this, target);
}
// PBuffer GLDrawable Creation
GLDrawableImpl pbufferDrawable;
AbstractGraphicsDevice device = config.getScreen().getDevice();
/**
* Due to the ATI Bug https://bugzilla.mozilla.org/show_bug.cgi?id=486277,
* we need to have a context current on the same Display to create a PBuffer.
* The dummy context shall also use the same Display,
* since switching Display in this regard is another ATI bug.
*/
SharedResource sr = (SharedResource) sharedResourceRunner.getOrCreateShared(device);
if( null!=sr && sr.isGLXVendorATI() && null == GLContext.getCurrent() ) {
sr.getContext().makeCurrent();
try {
pbufferDrawable = new X11PbufferGLXDrawable(this, target);
} finally {
sr.getContext().release();
}
} else {
pbufferDrawable = new X11PbufferGLXDrawable(this, target);
}
return pbufferDrawable;
}
public final boolean isGLXMultisampleAvailable(AbstractGraphicsDevice device) {
if(null != device) {
SharedResource sr = (SharedResource) sharedResourceRunner.getOrCreateShared(device);
if(null!=sr) {
return sr.isGLXMultisampleAvailable();
}
}
return false;
}
public final VersionNumber getGLXVersionNumber(AbstractGraphicsDevice device) {
if(null != device) {
SharedResource sr = (SharedResource) sharedResourceRunner.getOrCreateShared(device);
if(null!=sr) {
return sr.getGLXVersion();
}
if( device instanceof X11GraphicsDevice ) {
return GLXUtil.getGLXServerVersionNumber((X11GraphicsDevice)device);
}
}
return null;
}
public final boolean isGLXVersionGreaterEqualOneOne(AbstractGraphicsDevice device) {
if(null != device) {
SharedResource sr = (SharedResource) sharedResourceRunner.getOrCreateShared(device);
if(null!=sr) {
return sr.isGLXVersionGreaterEqualOneOne();
}
if( device instanceof X11GraphicsDevice ) {
final VersionNumber glXServerVersion = GLXUtil.getGLXServerVersionNumber((X11GraphicsDevice)device);
return glXServerVersion.compareTo(versionOneOne) >= 0;
}
}
return false;
}
public final boolean isGLXVersionGreaterEqualOneThree(AbstractGraphicsDevice device) {
if(null != device) {
SharedResource sr = (SharedResource) sharedResourceRunner.getOrCreateShared(device);
if(null!=sr) {
return sr.isGLXVersionGreaterEqualOneThree();
}
if( device instanceof X11GraphicsDevice ) {
final VersionNumber glXServerVersion = GLXUtil.getGLXServerVersionNumber((X11GraphicsDevice)device);
return glXServerVersion.compareTo(versionOneThree) >= 0;
}
}
return false;
}
@Override
public final boolean canCreateGLPbuffer(AbstractGraphicsDevice device) {
if(null == device) {
SharedResourceRunner.Resource sr = sharedResourceRunner.getOrCreateShared(defaultDevice);
if(null!=sr) {
device = sr.getDevice();
}
}
return isGLXVersionGreaterEqualOneThree(device);
}
@Override
protected final ProxySurface createMutableSurfaceImpl(AbstractGraphicsDevice deviceReq, boolean createNewDevice,
GLCapabilitiesImmutable capsChosen,
GLCapabilitiesImmutable capsRequested,
GLCapabilitiesChooser chooser, UpstreamSurfaceHook upstreamHook) {
final X11GraphicsDevice device;
if( createNewDevice || !(deviceReq instanceof X11GraphicsDevice) ) {
device = new X11GraphicsDevice(X11Util.openDisplay(deviceReq.getConnection()), deviceReq.getUnitID(), true /* owner */);
} else {
device = (X11GraphicsDevice) deviceReq;
}
final X11GraphicsScreen screen = new X11GraphicsScreen(device, device.getDefaultScreen());
final X11GLXGraphicsConfiguration config = X11GLXGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capsChosen, capsRequested, chooser, screen, VisualIDHolder.VID_UNDEFINED);
if(null == config) {
throw new GLException("Choosing GraphicsConfiguration failed w/ "+capsChosen+" on "+screen);
}
return new WrappedSurface(config, 0, upstreamHook, createNewDevice);
}
@Override
public final ProxySurface createDummySurfaceImpl(AbstractGraphicsDevice deviceReq, boolean createNewDevice,
GLCapabilitiesImmutable chosenCaps, GLCapabilitiesImmutable requestedCaps, GLCapabilitiesChooser chooser, int width, int height) {
chosenCaps = GLGraphicsConfigurationUtil.fixOnscreenGLCapabilities(chosenCaps);
return createMutableSurfaceImpl(deviceReq, createNewDevice, chosenCaps, requestedCaps, chooser, new X11DummyUpstreamSurfaceHook(width, height));
}
@Override
protected final ProxySurface createProxySurfaceImpl(AbstractGraphicsDevice deviceReq, int screenIdx, long windowHandle, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser, UpstreamSurfaceHook upstream) {
final X11GraphicsDevice device = new X11GraphicsDevice(X11Util.openDisplay(deviceReq.getConnection()), deviceReq.getUnitID(), true /* owner */);
final X11GraphicsScreen screen = new X11GraphicsScreen(device, screenIdx);
final int xvisualID = X11Lib.GetVisualIDFromWindow(device.getHandle(), windowHandle);
if(VisualIDHolder.VID_UNDEFINED == xvisualID) {
throw new GLException("Undefined VisualID of window 0x"+Long.toHexString(windowHandle)+", window probably invalid");
}
if(DEBUG) {
System.err.println("X11GLXDrawableFactory.createProxySurfaceImpl 0x"+Long.toHexString(windowHandle)+": visualID 0x"+Integer.toHexString(xvisualID));
}
final X11GLXGraphicsConfiguration cfg = X11GLXGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capsRequested, capsRequested, chooser, screen, xvisualID);
if(DEBUG) {
System.err.println("X11GLXDrawableFactory.createProxySurfaceImpl 0x"+Long.toHexString(windowHandle)+": "+cfg);
}
return new WrappedSurface(cfg, windowHandle, upstream, true);
}
@Override
protected final GLContext createExternalGLContextImpl() {
return X11ExternalGLXContext.create(this, null);
}
@Override
public final boolean canCreateExternalGLDrawable(AbstractGraphicsDevice device) {
return canCreateGLPbuffer(device);
}
@Override
protected final GLDrawable createExternalGLDrawableImpl() {
return X11ExternalGLXDrawable.create(this, null);
}
//----------------------------------------------------------------------
// Gamma-related functionality
//
private boolean gotGammaRampLength;
private int gammaRampLength;
@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 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 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);
}
}