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Java™ Binding for the OpenGL® API
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/*
* 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.
*
* Sun gratefully acknowledges that this software was originally authored
* and developed by Kenneth Bradley Russell and Christopher John Kline.
*/
package jogamp.opengl.windows.wgl;
import java.nio.IntBuffer;
import java.util.HashMap;
import java.util.Map;
import com.jogamp.nativewindow.AbstractGraphicsConfiguration;
import com.jogamp.nativewindow.AbstractGraphicsDevice;
import com.jogamp.nativewindow.NativeSurface;
import com.jogamp.opengl.GLContext;
import com.jogamp.opengl.GLException;
import com.jogamp.opengl.GLCapabilitiesImmutable;
import com.jogamp.common.ExceptionUtils;
import com.jogamp.common.nio.Buffers;
import com.jogamp.gluegen.runtime.ProcAddressTable;
import com.jogamp.gluegen.runtime.opengl.GLProcAddressResolver;
import com.jogamp.opengl.GLExtensions;
import com.jogamp.opengl.GLProfile;
import com.jogamp.opengl.GLRendererQuirks;
import jogamp.nativewindow.windows.GDI;
import jogamp.opengl.GLContextImpl;
import jogamp.opengl.GLDrawableImpl;
import jogamp.opengl.GLDynamicLookupHelper;
import jogamp.opengl.GLXExtensions;
public class WindowsWGLContext extends GLContextImpl {
static final Map extensionNameMap;
private boolean wglGetExtensionsStringEXTInitialized;
private boolean wglGetExtensionsStringEXTAvailable;
private boolean wglGLReadDrawableAvailableSet;
private boolean wglGLReadDrawableAvailable;
private WGLExt _wglExt;
// Table that holds the addresses of the native C-language entry points for
// WGL extension functions.
private WGLExtProcAddressTable wglExtProcAddressTable;
/** 2 WGL_EXT_swap_control_tear, 1 WGL_EXT_swap_control, 0 undefined, -1 none */
private int hasSwapInterval = 0;
private int hasSwapGroupNV = 0;
static {
extensionNameMap = new HashMap();
extensionNameMap.put(GLExtensions.ARB_pbuffer, WindowsWGLDrawableFactory.WGL_ARB_pbuffer);
extensionNameMap.put(GLExtensions.ARB_pixel_format, WindowsWGLDrawableFactory.WGL_ARB_pixel_format);
}
// FIXME: figure out how to hook back in the Java 2D / JOGL bridge
WindowsWGLContext(final GLDrawableImpl drawable,
final GLContext shareWith) {
super(drawable, shareWith);
}
@Override
protected void resetStates(final boolean isInit) {
wglGetExtensionsStringEXTInitialized=false;
wglGetExtensionsStringEXTAvailable=false;
wglGLReadDrawableAvailableSet=false;
wglGLReadDrawableAvailable=false;
// no inner state _wglExt=null;
wglExtProcAddressTable=null;
hasSwapInterval = 0;
hasSwapGroupNV = 0;
super.resetStates(isInit);
}
@Override
public Object getPlatformGLExtensions() {
return getWGLExt();
}
/* package private */ final WGLExt getWGLExt() {
if( null == getWGLExtProcAddressTable()) {
throw new InternalError("Null WGLExtProcAddressTable");
}
if (_wglExt == null) {
_wglExt = new WGLExtImpl(this);
}
return _wglExt;
}
@Override
public final boolean isGLReadDrawableAvailable() {
if(!wglGLReadDrawableAvailableSet && null != getWGLExtProcAddressTable()) {
final WindowsWGLDrawableFactory factory = (WindowsWGLDrawableFactory)drawable.getFactoryImpl();
final AbstractGraphicsConfiguration config = drawable.getNativeSurface().getGraphicsConfiguration();
final AbstractGraphicsDevice device = config.getScreen().getDevice();
switch( factory.isReadDrawableAvailable(device) ) {
case 1:
wglGLReadDrawableAvailable = true;
wglGLReadDrawableAvailableSet=true;
break;
case 0:
wglGLReadDrawableAvailable = false;
wglGLReadDrawableAvailableSet=true;
break;
}
}
return wglGLReadDrawableAvailable;
}
private final boolean wglMakeContextCurrent(final long hDrawDC, final long hReadDC, final long ctx) {
boolean ok = false;
if(wglGLReadDrawableAvailable) {
// needs initilized WGL ProcAddress table
ok = getWGLExt().wglMakeContextCurrent(hDrawDC, hReadDC, ctx);
} else if ( hDrawDC == hReadDC ) {
ok = WGL.wglMakeCurrent(hDrawDC, ctx);
} else {
// should not happen due to 'isGLReadDrawableAvailable()' query in GLContextImpl
throw new InternalError("Given readDrawable but no driver support");
}
if(DEBUG && !ok) {
final Throwable t = new Throwable ("Info: wglMakeContextCurrent NOK: draw "+
GLContext.toHexString(hDrawDC) + ", read " + GLContext.toHexString(hReadDC) +
", ctx " + GLContext.toHexString(ctx) + ", werr " + GDI.GetLastError());
t.printStackTrace();
}
return ok;
}
private final boolean wglReleaseContext() {
boolean ok = false;
if(wglGLReadDrawableAvailable) {
// needs initilized WGL ProcAddress table
ok = getWGLExt().wglMakeContextCurrent(0, 0, 0);
} else {
ok = WGL.wglMakeCurrent(0, 0);
}
if( !ok ) {
final int werr = GDI.GetLastError();
final boolean ok2 = werr == GDI.ERROR_SUCCESS;
if(DEBUG) {
final Throwable t = new Throwable ("Info: wglReleaseContext NOK: werr " + werr + " -> ok "+ok2);
t.printStackTrace();
}
// Some GPU's falsely fails with a zero error code (success),
// in case this is a release context request we tolerate this
return ok2 ;
}
return ok;
}
@Override
public final ProcAddressTable getPlatformExtProcAddressTable() {
return getWGLExtProcAddressTable();
}
public final WGLExtProcAddressTable getWGLExtProcAddressTable() {
return wglExtProcAddressTable;
}
@Override
protected Map getFunctionNameMap() { return null; }
@Override
protected Map getExtensionNameMap() { return extensionNameMap; }
@Override
protected void destroyContextARBImpl(final long context) {
WGL.wglMakeCurrent(0, 0);
WGL.wglDeleteContext(context);
}
@Override
protected long createContextARBImpl(final long share, final boolean direct, final int ctp, final int major, final int minor) {
if(DEBUG) {
System.err.println(getThreadName()+" - WindowWGLContext.createContextARBImpl: "+getGLVersion(major, minor, ctp, "@creation") +
", handle "+toHexString(drawable.getHandle()) + ", share "+toHexString(share)+", direct "+direct);
}
final boolean ctDesktopGL = 0 == ( CTX_PROFILE_ES & ctp );
final boolean ctBwdCompat = 0 != ( CTX_PROFILE_COMPAT & ctp ) ;
final boolean ctFwdCompat = 0 != ( CTX_OPTION_FORWARD & ctp ) ;
final boolean ctDebug = 0 != ( CTX_OPTION_DEBUG & ctp ) ;
if( !ctDesktopGL ) {
if(DEBUG) {
System.err.println(getThreadName() + ": WindowWGLContext.createContextARBImpl: GL ES not avail "+getGLVersion(major, minor, ctp, "@creation"));
}
return 0; // n/a
}
if( null == getWGLExtProcAddressTable()) {
final GLDynamicLookupHelper dlh = getGLDynamicLookupHelper(major, ctp);
if( null == dlh ) {
if(DEBUG) {
System.err.println(getThreadName()+" - WindowWGLContext.createContextARBImpl: Null GLDynamicLookupHelper");
}
return 0;
} else {
updateGLXProcAddressTable(null, dlh);
}
}
final WGLExt _wglExt = getWGLExt();
if(DEBUG) {
System.err.println(getThreadName()+" - WindowWGLContext.createContextARBImpl: "+
", wglCreateContextAttribsARB: "+toHexString(wglExtProcAddressTable._addressof_wglCreateContextAttribsARB));
}
long ctx=0;
final int idx_flags = 4;
final int idx_profile = 6;
/* WGLExt.WGL_CONTEXT_LAYER_PLANE_ARB, WGLExt.WGL_CONTEXT_LAYER_PLANE_ARB, */
final int attribs[] = {
/* 0 */ WGLExt.WGL_CONTEXT_MAJOR_VERSION_ARB, major,
/* 2 */ WGLExt.WGL_CONTEXT_MINOR_VERSION_ARB, minor,
/* 4 */ WGLExt.WGL_CONTEXT_FLAGS_ARB, 0,
/* 6 */ 0, 0,
/* 8 */ 0
};
if ( major > 3 || major == 3 && minor >= 2 ) {
attribs[idx_profile+0] = WGLExt.WGL_CONTEXT_PROFILE_MASK_ARB;
if( ctBwdCompat ) {
attribs[idx_profile+1] = WGLExt.WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB;
} else {
attribs[idx_profile+1] = WGLExt.WGL_CONTEXT_CORE_PROFILE_BIT_ARB;
}
}
if ( major >= 3 ) {
if( !ctBwdCompat && ctFwdCompat ) {
attribs[idx_flags+1] |= WGLExt.WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB;
}
if( ctDebug) {
attribs[idx_flags+1] |= WGLExt.WGL_CONTEXT_DEBUG_BIT_ARB;
}
}
try {
final IntBuffer attribsNIO = Buffers.newDirectIntBuffer(attribs);
ctx = _wglExt.wglCreateContextAttribsARB(drawable.getHandle(), share, attribsNIO);
} catch (final RuntimeException re) {
if(DEBUG) {
final Throwable t = new Throwable("Info: WindowWGLContext.createContextARBImpl wglCreateContextAttribsARB failed with "+getGLVersion(major, minor, ctp, "@creation"), re);
t.printStackTrace();
}
}
if(0!=ctx) {
if (!wglMakeContextCurrent(drawable.getHandle(), drawableRead.getHandle(), ctx)) {
if(DEBUG) {
System.err.println("WindowsWGLContext.createContextARB couldn't make current "+getGLVersion(major, minor, ctp, "@creation"));
}
WGL.wglMakeCurrent(0, 0);
WGL.wglDeleteContext(ctx);
ctx = 0;
} else if (DEBUG) {
System.err.println(getThreadName() + ": createContextARBImpl: OK "+getGLVersion(major, minor, ctp, "@creation")+", share "+share+", direct "+direct);
}
} else if (DEBUG) {
System.err.println(getThreadName() + ": createContextARBImpl: NO "+getGLVersion(major, minor, ctp, "@creation"));
}
return ctx;
}
/**
* Creates and initializes an appropriate OpenGL context. Should only be
* called by {@link #makeCurrentImpl()}.
*/
@Override
protected boolean createImpl(long shareWithHandle) throws GLException {
final AbstractGraphicsConfiguration config = drawable.getNativeSurface().getGraphicsConfiguration();
final AbstractGraphicsDevice device = config.getScreen().getDevice();
final WindowsWGLDrawableFactory factory = (WindowsWGLDrawableFactory)drawable.getFactoryImpl();
final WindowsWGLContext sharedContext = (WindowsWGLContext) factory.getOrCreateSharedContext(device);
final GLCapabilitiesImmutable glCaps = drawable.getChosenGLCapabilities();
isGLReadDrawableAvailable(); // trigger setup wglGLReadDrawableAvailable
final boolean createContextARBAvailable = isCreateContextARBAvail(device) && !glCaps.isBitmap();
final boolean sharedCreatedWithARB = null != sharedContext && sharedContext.isCreatedWithARBMethod();
if(DEBUG) {
System.err.println(getThreadName() + ": WindowsWGLContext.createImpl: START "+glCaps+", share "+toHexString(shareWithHandle));
System.err.println(getThreadName() + ": Use ARB[avail["+getCreateContextARBAvailStr(device)+
"], bitmap "+glCaps.isBitmap()+" -> "+createContextARBAvailable+
"], shared "+sharedCreatedWithARB+"]");
}
final GLProfile glp = glCaps.getGLProfile();
if( glp.isGLES() ) {
throw new GLException(getThreadName()+": Unable to create OpenGL ES context on desktopDevice "+device+
", config "+config+", "+glp+", shareWith "+toHexString(shareWithHandle));
}
boolean createContextARBTried = false;
// utilize the shared context's GLXExt in case it was using the ARB method and it already exists
if( createContextARBAvailable && sharedCreatedWithARB ) {
if ( sharedContext.getRendererQuirks().exist( GLRendererQuirks.NeedCurrCtx4ARBCreateContext ) ) {
if(GLContext.CONTEXT_NOT_CURRENT == sharedContext.makeCurrent()) {
throw new GLException("Could not make Shared Context current: "+sharedContext);
}
contextHandle = createContextARB(shareWithHandle, true);
sharedContext.release();
if (!wglMakeContextCurrent(drawable.getHandle(), drawableRead.getHandle(), contextHandle)) {
throw new GLException("Cannot make previous verified context current: 0x" + toHexString(contextHandle) + ", werr: " + GDI.GetLastError());
}
} else {
contextHandle = createContextARB(shareWithHandle, true);
}
createContextARBTried = true;
if ( DEBUG && 0 != contextHandle ) {
System.err.println(getThreadName() + ": createImpl: OK (ARB, using sharedContext) share "+toHexString(shareWithHandle));
}
}
final long temp_ctx;
if( 0 == contextHandle ) {
// To use WGL_ARB_create_context, we have to make a temp context current,
// so we are able to use GetProcAddress
temp_ctx = WGL.wglCreateContext(drawable.getHandle());
if ( 0 == temp_ctx ) {
throw new GLException("Unable to create temp OpenGL context for device context " + toHexString(drawable.getHandle()));
}
if ( !WGL.wglMakeCurrent(drawable.getHandle(), temp_ctx) ) {
throw new GLException("Error making temp context current: 0x" + toHexString(temp_ctx) + ", werr: "+GDI.GetLastError());
}
if( !setGLFunctionAvailability(true, 0, 0, CTX_PROFILE_COMPAT, false /* strictMatch */, null == sharedContext /* withinGLVersionsMapping */) ) { // use GL_VERSION
WGL.wglMakeCurrent(0, 0); // release temp context
WGL.wglDeleteContext(temp_ctx);
throw new GLException("setGLFunctionAvailability !strictMatch failed");
}
WGL.wglMakeCurrent(0, 0); // release temp context
if( createContextARBAvailable && !createContextARBTried ) {
// is*Available calls are valid since setGLFunctionAvailability(..) was called
final boolean isProcCreateContextAttribsARBAvailable = isFunctionAvailable("wglCreateContextAttribsARB");
final boolean isExtARBCreateContextAvailable = isExtensionAvailable("WGL_ARB_create_context");
if ( isProcCreateContextAttribsARBAvailable && isExtARBCreateContextAvailable ) {
// initial ARB context creation
contextHandle = createContextARB(shareWithHandle, true);
createContextARBTried=true;
if (DEBUG) {
if( 0 != contextHandle ) {
System.err.println(getThreadName() + ": createImpl: OK (ARB, initial) share "+toHexString(shareWithHandle));
} else {
System.err.println(getThreadName() + ": createImpl: NOT OK (ARB, initial) - creation failed - share "+toHexString(shareWithHandle));
}
}
} else if (DEBUG) {
System.err.println(getThreadName() + ": createImpl: NOT OK (ARB, initial) - extension not available - share "+toHexString(shareWithHandle)+
", isProcCreateContextAttribsARBAvailable "+isProcCreateContextAttribsARBAvailable+
", isExtGLXARBCreateContextAvailable "+isExtARBCreateContextAvailable);
}
}
} else {
temp_ctx = 0;
}
if( 0 != contextHandle ) {
shareWithHandle = 0; // mark as shared thx to the ARB create method
if( 0 != temp_ctx ) {
WGL.wglMakeCurrent(0, 0);
WGL.wglDeleteContext(temp_ctx);
if (!wglMakeContextCurrent(drawable.getHandle(), drawableRead.getHandle(), contextHandle)) {
throw new GLException("Cannot make previous verified context current: 0x" + toHexString(contextHandle) + ", werr: " + GDI.GetLastError());
}
}
} else {
if( glCaps.getGLProfile().isGL3() && createContextARBTried ) {
// We shall not allow context creation >= GL3 w/ non ARB methods if ARB is used,
// otherwise context of similar profile but different creation method may not be share-able.
WGL.wglMakeCurrent(0, 0);
WGL.wglDeleteContext(temp_ctx);
throw new GLException(getThreadName()+": createImpl ctx !ARB but ARB is used, profile > GL2 requested (OpenGL >= 3.1). Requested: "+glCaps.getGLProfile()+", current: "+getGLVersion());
}
if(DEBUG) {
System.err.println(getThreadName()+": createImpl ARB not used[avail "+createContextARBAvailable+
", tried "+createContextARBTried+"], fall back to !ARB context "+getGLVersion());
}
// continue with temp context
contextHandle = temp_ctx;
if ( !wglMakeContextCurrent(drawable.getHandle(), drawableRead.getHandle(), contextHandle) ) {
WGL.wglMakeCurrent(0, 0);
WGL.wglDeleteContext(contextHandle);
throw new GLException("Error making old context current: 0x" + toHexString(contextHandle) + ", werr: " + GDI.GetLastError());
}
if( 0 != shareWithHandle ) {
// Windows can set up sharing of display lists after creation time if using GDI
// Only utilize the classic GDI 'wglShareLists' shared context method
// for traditional non ARB context.
if ( !WGL.wglShareLists(shareWithHandle, contextHandle) ) {
throw new GLException("wglShareLists(" + toHexString(shareWithHandle) +
", " + toHexString(contextHandle) + ") failed: werr " + GDI.GetLastError());
}
}
if (DEBUG) {
System.err.println(getThreadName() + ": createImpl: OK (old) share "+toHexString(shareWithHandle));
}
}
return true;
}
@Override
protected void makeCurrentImpl() throws GLException {
if ( !wglMakeContextCurrent(drawable.getHandle(), drawableRead.getHandle(), contextHandle) ) {
throw new GLException("Error making context " + toHexString(contextHandle) +
" current on Thread " + getThreadName() +
", drawableWrite " + toHexString(drawable.getHandle()) +
", drawableRead "+ toHexString(drawableRead.getHandle()) +
", werr: " + GDI.GetLastError() + ", " + this);
}
}
@Override
protected void releaseImpl() throws GLException {
if ( !wglReleaseContext() ) {
throw new GLException("Error freeing OpenGL context, werr: " + GDI.GetLastError());
}
}
@Override
protected void destroyImpl() throws GLException {
WGL.wglMakeCurrent(0, 0);
if (!WGL.wglDeleteContext(contextHandle)) {
throw new GLException("Unable to delete OpenGL context");
}
}
@Override
protected void copyImpl(final GLContext source, final int mask) throws GLException {
if (!WGL.wglCopyContext(source.getHandle(), getHandle(), mask)) {
throw new GLException("wglCopyContext failed");
}
}
/**
* {@inheritDoc}
*
* Ignoring {@code contextFQN}, using {@code WGL}-{@link AbstractGraphicsDevice#getUniqueID()}.
*
*/
@Override
protected final void updateGLXProcAddressTable(final String contextFQN, final GLDynamicLookupHelper dlh) {
if( null == dlh ) {
throw new GLException("No GLDynamicLookupHelper for "+this);
}
final AbstractGraphicsConfiguration aconfig = drawable.getNativeSurface().getGraphicsConfiguration();
final AbstractGraphicsDevice adevice = aconfig.getScreen().getDevice();
final String key = "WGL-"+adevice.getUniqueID();
if (DEBUG) {
System.err.println(getThreadName() + ": Initializing WGL extension address table: "+key);
}
wglGetExtensionsStringEXTInitialized=false;
wglGetExtensionsStringEXTAvailable=false;
wglGLReadDrawableAvailableSet=false;
wglGLReadDrawableAvailable=false;
ProcAddressTable table = null;
synchronized(mappedContextTypeObjectLock) {
table = mappedGLXProcAddress.get( key );
}
if(null != table) {
wglExtProcAddressTable = (WGLExtProcAddressTable) table;
if(DEBUG) {
System.err.println(getThreadName() + ": GLContext WGL ProcAddressTable reusing key("+key+") -> "+toHexString(table.hashCode()));
}
} else {
wglExtProcAddressTable = new WGLExtProcAddressTable(new GLProcAddressResolver());
resetProcAddressTable(wglExtProcAddressTable, dlh);
synchronized(mappedContextTypeObjectLock) {
mappedGLXProcAddress.put(key, getWGLExtProcAddressTable());
if(DEBUG) {
System.err.println(getThreadName() + ": GLContext WGL ProcAddressTable mapping key("+key+") -> "+toHexString(getWGLExtProcAddressTable().hashCode()));
}
}
}
}
@Override
protected final StringBuilder getPlatformExtensionsStringImpl() {
final StringBuilder sb = new StringBuilder();
if (!wglGetExtensionsStringEXTInitialized) {
wglGetExtensionsStringEXTAvailable = (WGL.wglGetProcAddress("wglGetExtensionsStringEXT") != 0);
wglGetExtensionsStringEXTInitialized = true;
}
if (wglGetExtensionsStringEXTAvailable) {
sb.append(getWGLExt().wglGetExtensionsStringEXT());
}
return sb;
}
@Override
protected final Integer setSwapIntervalImpl2(final int interval) {
if( !drawable.getChosenGLCapabilities().isOnscreen() ) {
return null;
}
if( 0 == hasSwapInterval ) {
try {
if ( isExtensionAvailable(GLXExtensions.WGL_EXT_swap_control) ) {
hasSwapInterval = 1;
if ( isExtensionAvailable(GLXExtensions.WGL_EXT_swap_control_tear) ) {
hasSwapInterval = 2;
if(DEBUG) { System.err.println("WGLContext.setSwapInterval.2 using: "+GLXExtensions.WGL_EXT_swap_control_tear + ", " + GLXExtensions.WGL_EXT_swap_control_tear); }
} else {
hasSwapInterval = 1;
if(DEBUG) { System.err.println("WGLContext.setSwapInterval.1 using: "+GLXExtensions.WGL_EXT_swap_control); }
}
} else {
hasSwapInterval = -1;
if(DEBUG) { System.err.println("WGLContext.setSwapInterval.0 N/A"); }
}
} catch (final Throwable t) { hasSwapInterval=-1; if(DEBUG) { ExceptionUtils.dumpThrowable("", t); } }
}
if ( 0 < hasSwapInterval ) { // 2 || 1
final int useInterval;
if( 1 == hasSwapInterval && 0 > interval ) {
useInterval = Math.abs(interval);
} else {
useInterval = interval;
}
try {
final WGLExt wglExt = getWGLExt();
if( wglExt.wglSwapIntervalEXT(useInterval) ) {
return Integer.valueOf(useInterval);
}
} catch (final Throwable t) { hasSwapInterval=-1; if(DEBUG) { ExceptionUtils.dumpThrowable("", t); } }
}
return null;
}
private final int initSwapGroupImpl(final WGLExt wglExt) {
if(0==hasSwapGroupNV) {
try {
hasSwapGroupNV = wglExt.isExtensionAvailable("WGL_NV_swap_group")?1:-1;
} catch (final Throwable t) { hasSwapGroupNV=1; }
if(DEBUG) {
System.err.println("initSwapGroupImpl: hasSwapGroupNV: "+hasSwapGroupNV);
}
}
return hasSwapGroupNV;
}
@Override
protected final boolean queryMaxSwapGroupsImpl(final int[] maxGroups, final int maxGroups_offset,
final int[] maxBarriers, final int maxBarriers_offset) {
boolean res = false;
final WGLExt wglExt = getWGLExt();
if (initSwapGroupImpl(wglExt)>0) {
final NativeSurface ns = drawable.getNativeSurface();
try {
final IntBuffer maxGroupsNIO = Buffers.newDirectIntBuffer(maxGroups.length - maxGroups_offset);
final IntBuffer maxBarriersNIO = Buffers.newDirectIntBuffer(maxBarriers.length - maxBarriers_offset);
if( wglExt.wglQueryMaxSwapGroupsNV(ns.getDisplayHandle(), maxGroupsNIO, maxBarriersNIO) ) {
maxGroupsNIO.get(maxGroups, maxGroups_offset, maxGroupsNIO.remaining());
maxBarriersNIO.get(maxGroups, maxGroups_offset, maxBarriersNIO.remaining());
res = true;
}
} catch (final Throwable t) { hasSwapGroupNV=-1; }
}
return res;
}
@Override
protected final boolean joinSwapGroupImpl(final int group) {
boolean res = false;
final WGLExt wglExt = getWGLExt();
if (initSwapGroupImpl(wglExt)>0) {
try {
if( wglExt.wglJoinSwapGroupNV(drawable.getHandle(), group) ) {
currentSwapGroup = group;
res = true;
}
} catch (final Throwable t) { hasSwapGroupNV=-1; }
}
return res;
}
@Override
protected final boolean bindSwapBarrierImpl(final int group, final int barrier) {
boolean res = false;
final WGLExt wglExt = getWGLExt();
if (initSwapGroupImpl(wglExt)>0) {
try {
if( wglExt.wglBindSwapBarrierNV(group, barrier) ) {
res = true;
}
} catch (final Throwable t) { hasSwapGroupNV=-1; }
}
return res;
}
}