/*
* Copyright (c) 2003 Sun Microsystems, Inc. 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 com.jogamp.opengl.impl;
import com.jogamp.common.os.DynamicLookupHelper;
import java.nio.*;
import java.util.*;
import javax.media.opengl.*;
import javax.media.nativewindow.*;
import com.jogamp.gluegen.runtime.*;
import com.jogamp.gluegen.runtime.opengl.*;
import com.jogamp.common.util.ReflectionUtil;
public abstract class GLContextImpl extends GLContext {
protected GLContextLock lock = new GLContextLock();
protected static final boolean DEBUG = Debug.debug("GLContext");
protected static final boolean VERBOSE = Debug.verbose();
// NOTE: default sense of GLContext optimization disabled in JSR-231
// 1.0 beta 5 due to problems on X11 platforms (both Linux and
// Solaris) when moving and resizing windows. Apparently GLX tokens
// get sent to the X server under the hood (and out from under the
// cover of the AWT lock) in these situations. Users requiring
// multi-screen X11 applications can manually enable this flag. It
// basically had no tangible effect on the Windows or Mac OS X
// platforms anyway in particular with the disabling of the
// GLWorkerThread which we found to be necessary in 1.0 beta 4.
protected boolean optimizationEnabled = Debug.isPropertyDefined("jogl.GLContext.optimize", true);
// Cache of the functions that are available to be called at the current
// moment in time
protected ExtensionAvailabilityCache extensionAvailability;
// Table that holds the addresses of the native C-language entry points for
// OpenGL functions.
private ProcAddressTable glProcAddressTable;
// Tracks creation and initialization of buffer objects to avoid
// repeated glGet calls upon glMapBuffer operations
private GLBufferSizeTracker bufferSizeTracker; // Singleton - Set by GLContextShareSet
private GLBufferStateTracker bufferStateTracker = new GLBufferStateTracker();
private GLStateTracker glStateTracker = new GLStateTracker();
protected GLDrawableImpl drawable;
protected GLDrawableImpl drawableRead;
protected GL gl;
public GLContextImpl(GLDrawableImpl drawable, GLDrawableImpl drawableRead, GLContext shareWith) {
extensionAvailability = new ExtensionAvailabilityCache(this);
if (shareWith != null) {
GLContextShareSet.registerSharing(this, shareWith);
}
GLContextShareSet.registerForBufferObjectSharing(shareWith, this);
// This must occur after the above calls into the
// GLContextShareSet, which set up state needed by the GL object
setGL(createGL(drawable.getGLProfile()));
this.drawable = drawable;
setGLDrawableRead(drawableRead);
}
public GLContextImpl(GLDrawableImpl drawable, GLContext shareWith) {
this(drawable, null, shareWith);
}
public void setGLDrawableRead(GLDrawable read) {
boolean lockHeld = lock.isHeld();
if(lockHeld) {
release();
}
drawableRead = ( null != read ) ? (GLDrawableImpl) read : drawable;
if(lockHeld) {
makeCurrent();
}
}
public GLDrawable getGLDrawable() {
return drawable;
}
public GLDrawable getGLDrawableRead() {
return drawableRead;
}
public GLDrawableImpl getDrawableImpl() {
return (GLDrawableImpl) getGLDrawable();
}
public final GL getGL() {
return gl;
}
public GL setGL(GL gl) {
if(DEBUG) {
String sgl1 = (null!=this.gl)?this.gl.getClass().toString()+", "+this.gl.toString():new String("<null>");
String sgl2 = (null!=gl)?gl.getClass().toString()+", "+gl.toString():new String("<null>");
Exception e = new Exception("setGL (OpenGL "+getGLVersion()+"): "+Thread.currentThread()+", "+sgl1+" -> "+sgl2);
e.printStackTrace();
}
this.gl = gl;
return gl;
}
// This is only needed for Mac OS X on-screen contexts
protected void update() throws GLException { }
public boolean isSynchronized() {
return !lock.getFailFastMode();
}
public void setSynchronized(boolean isSynchronized) {
lock.setFailFastMode(!isSynchronized);
}
public abstract Object getPlatformGLExtensions();
public void release() throws GLException {
if (!lock.isHeld()) {
throw new GLException("Context not current on current thread");
}
setCurrent(null);
try {
releaseImpl();
} finally {
lock.unlock();
}
}
protected abstract void releaseImpl() throws GLException;
public void destroy() {
if (lock.isHeld()) {
// release current context
release();
}
// Must hold the lock around the destroy operation to make sure we
// don't destroy the context out from under another thread rendering to it
lock.lock();
try {
/* FIXME: refactor dependence on Java 2D / JOGL bridge
if (tracker != null) {
// Don't need to do anything for contexts that haven't been
// created yet
if (isCreated()) {
// If we are tracking creation and destruction of server-side
// OpenGL objects, we must decrement the reference count of the
// GLObjectTracker upon context destruction.
//
// Note that we can only eagerly delete these server-side
// objects if there is another context currrent right now
// which shares textures and display lists with this one.
tracker.unref(deletedObjectTracker);
}
}
*/
// Because we don't know how many other contexts we might be
// sharing with (and it seems too complicated to implement the
// GLObjectTracker's ref/unref scheme for the buffer-related
// optimizations), simply clear the cache of known buffers' sizes
// when we destroy contexts
if (bufferSizeTracker != null) {
bufferSizeTracker.clearCachedBufferSizes();
}
if (bufferStateTracker != null) {
bufferStateTracker.clearBufferObjectState();
}
if (glStateTracker != null) {
glStateTracker.clearStates(false);
}
destroyImpl();
} finally {
lock.unlock();
}
}
protected abstract void destroyImpl() throws GLException;
//----------------------------------------------------------------------
//
/**
* MakeCurrent functionality, which also issues the creation of the actual OpenGL context.<br>
* The complete callgraph for general OpenGL context creation is:<br>
* <ul>
* <li> {@link #makeCurrent} <i>GLContextImpl</i>
* <li> {@link #makeCurrentImpl} <i>Platform Implementation</i>
* <li> {@link #create} <i>Platform Implementation</i>
* <li> If <code>ARB_create_context</code> is supported:
* <ul>
* <li> {@link #createContextARB} <i>GLContextImpl</i>
* <li> {@link #createContextARBImpl} <i>Platform Implementation</i>
* </ul>
* </ul><br>
*
* Once at startup, ie triggered by the singleton {@link GLDrawableImpl} constructor,
* calling {@link #createContextARB} will query all available OpenGL versions:<br>
* <ul>
* <li> <code>FOR ALL GL* DO</code>:
* <ul>
* <li> {@link #createContextARBMapVersionsAvailable}
* <ul>
* <li> {@link #createContextARBVersions}
* </ul>
* <li> {@link #mapVersionAvailable}
* </ul>
* </ul><br>
*
* @see #makeCurrentImpl
* @see #create
* @see #createContextARB
* @see #createContextARBImpl
* @see #mapVersionAvailable
* @see #destroyContextARBImpl
*/
public int makeCurrent() throws GLException {
// One context can only be current by one thread,
// and one thread can only have one context current!
GLContext current = getCurrent();
if (current != null) {
if (current == this) {
// Assume we don't need to make this context current again
// For Mac OS X, however, we need to update the context to track resizes
update();
return CONTEXT_CURRENT;
} else {
current.release();
}
}
if (GLWorkerThread.isStarted() &&
!GLWorkerThread.isWorkerThread()) {
// Kick the GLWorkerThread off its current context
GLWorkerThread.invokeLater(new Runnable() { public void run() {} });
}
if (!isCreated()) {
// verify if the drawable has chosen Capabilities
if (null == getGLDrawable().getChosenGLCapabilities()) {
throw new GLException("drawable has no chosen GLCapabilities: "+getGLDrawable());
}
}
lock.lock();
int res = 0;
try {
res = makeCurrentImpl();
/* FIXME: refactor dependence on Java 2D / JOGL bridge
if ((tracker != null) &&
(res == CONTEXT_CURRENT_NEW)) {
// Increase reference count of GLObjectTracker
tracker.ref();
}
*/
} catch (GLException e) {
lock.unlock();
throw(e);
}
if (res == CONTEXT_NOT_CURRENT) {
lock.unlock();
} else {
if(res == CONTEXT_CURRENT_NEW) {
// check if the drawable's and the GL's GLProfile are equal
// throws an GLException if not
getGLDrawable().getGLProfile().verifyEquality(gl.getGLProfile());
}
setCurrent(this);
/* FIXME: refactor dependence on Java 2D / JOGL bridge
// Try cleaning up any stale server-side OpenGL objects
// FIXME: not sure what to do here if this throws
if (deletedObjectTracker != null) {
deletedObjectTracker.clean(getGL());
}
*/
}
return res;
}
/**
* @see #makeCurrent
*/
protected abstract int makeCurrentImpl() throws GLException;
/**
* @see #makeCurrent
*/
protected abstract void create() throws GLException ;
/**
* Platform dependent but harmonized implementation of the <code>ARB_create_context</code>
* mechanism to create a context.<br>
*
* This method is called from {@link #createContextARB}.<br>
*
* The implementation shall verify this context with a
* <code>MakeContextCurrent</code> call.<br>
*
* @param share the shared context or null
* @param direct flag if direct is requested
* @param ctxOptionFlags <code>ARB_create_context</code> related, see references below
* @param major major number
* @param minor minor number
* @return the valid context if successfull, or null
*
* @see #makeCurrent
* @see #CTX_PROFILE_COMPAT
* @see #CTX_OPTION_FORWARD
* @see #CTX_OPTION_DEBUG
* @see #makeCurrentImpl
* @see #create
* @see #createContextARB
* @see #createContextARBImpl
* @see #destroyContextARBImpl
*/
protected abstract long createContextARBImpl(long share, boolean direct, int ctxOptionFlags,
int major, int minor);
/**
* Destroy the context created by {@link #createContextARBImpl}.
*
* @see #makeCurrent
* @see #makeCurrentImpl
* @see #create
* @see #createContextARB
* @see #createContextARBImpl
* @see #destroyContextARBImpl
*/
protected abstract void destroyContextARBImpl(long context);
/**
* Platform independent part of using the <code>ARB_create_context</code>
* mechanism to create a context.<br>
*
* The implementation of {@link #create} shall use this protocol in case the platform supports <code>ARB_create_context</code>.<br>
*
* This method may call {@link #createContextARBImpl} and {@link #destroyContextARBImpl}. <br>
*
* This method will also query all available native OpenGL context when first called,<br>
* usually the first call should happen with the shared GLContext of the DrawableFactory.<br>
*
* @see #makeCurrentImpl
* @see #create
* @see #createContextARB
* @see #createContextARBImpl
* @see #destroyContextARBImpl
*/
protected long createContextARB(long share, boolean direct,
int major[], int minor[], int ctp[])
{
AbstractGraphicsConfiguration config = drawable.getNativeWindow().getGraphicsConfiguration().getNativeGraphicsConfiguration();
GLCapabilities glCaps = (GLCapabilities) config.getChosenCapabilities();
GLProfile glp = glCaps.getGLProfile();
long _context = 0;
if( !mappedVersionsAvailableSet ) {
synchronized(mappedVersionsAvailableLock) {
if( !mappedVersionsAvailableSet ) {
createContextARBMapVersionsAvailable(4, false /* compat */); // GL4
createContextARBMapVersionsAvailable(4, true /* compat */); // GL4bc
createContextARBMapVersionsAvailable(3, false /* compat */); // GL3
createContextARBMapVersionsAvailable(3, true /* compat */); // GL3bc
createContextARBMapVersionsAvailable(2, true /* compat */); // GL2
mappedVersionsAvailableSet=true;
}
}
}
int reqMajor;
if(glp.isGL4()) {
reqMajor=4;
} else if (glp.isGL3()) {
reqMajor=3;
} else /* if (glp.isGL2()) */ {
reqMajor=2;
}
boolean compat = glp.isGL2(); // incl GL3bc and GL4bc
int key = compose8bit(reqMajor, compat?CTX_PROFILE_COMPAT:CTX_PROFILE_CORE, 0, 0);
int val = mappedVersionsAvailable.get( key );
long _ctx = 0;
if(val>0) {
int _major = getComposed8bit(val, 1);
int _minor = getComposed8bit(val, 2);
int _ctp = getComposed8bit(val, 3);
_ctx = createContextARBImpl(share, direct, _ctp, _major, _minor);
if(0!=_ctx) {
setGLFunctionAvailability(true, _major, _minor, _ctp);
}
}
return _ctx;
}
private void createContextARBMapVersionsAvailable(int reqMajor, boolean compat)
{
long _context;
int reqProfile = compat ? CTX_PROFILE_COMPAT : CTX_PROFILE_CORE ;
int ctp = CTX_IS_ARB_CREATED | CTX_PROFILE_CORE | CTX_OPTION_ANY; // default
if(compat) {
ctp &= ~CTX_PROFILE_CORE ;
ctp |= CTX_PROFILE_COMPAT ;
}
// FIXME GL3GL4:
// To avoid OpenGL implementation bugs and raise compatibility
// within JOGL, we map to the proper GL version.
// This may change later when GL3 and GL4 drivers become more mature!
// Bug: To ensure GL profile compatibility within the JOGL application
// Bug: we always try to map against the highest GL version,
// Bug: so the use can always cast to a higher one
// Bug: int majorMax=GLContext.getMaxMajor();
// Bug: int minorMax=GLContext.getMaxMinor(majorMax);
int majorMax, minorMax;
int majorMin, minorMin;
int major[] = new int[1];
int minor[] = new int[1];
if( 4 == reqMajor ) {
majorMax=4; minorMax=GLContext.getMaxMinor(majorMax);
majorMin=4; minorMin=0;
} else if( 3 == reqMajor ) {
majorMax=3; minorMax=GLContext.getMaxMinor(majorMax);
majorMin=3; minorMin=1;
} else /* if( glp.isGL2() ) */ {
majorMax=3; minorMax=0;
majorMin=1; minorMin=1; // our minimum desktop OpenGL runtime requirements
}
_context = createContextARBVersions(0, true, ctp,
/* max */ majorMax, minorMax,
/* min */ majorMin, minorMin,
/* res */ major, minor);
if(0==_context && !compat) {
ctp &= ~CTX_PROFILE_COMPAT ;
ctp |= CTX_PROFILE_CORE ;
ctp &= ~CTX_OPTION_ANY ;
ctp |= CTX_OPTION_FORWARD ;
_context = createContextARBVersions(0, true, ctp,
/* max */ majorMax, minorMax,
/* min */ majorMin, minorMin,
/* res */ major, minor);
if(0==_context) {
// Try a compatible one .. even though not requested .. last resort
ctp &= ~CTX_PROFILE_CORE ;
ctp |= CTX_PROFILE_COMPAT ;
ctp &= ~CTX_OPTION_FORWARD ;
ctp |= CTX_OPTION_ANY ;
_context = createContextARBVersions(0, true, ctp,
/* max */ majorMax, minorMax,
/* min */ majorMin, minorMin,
/* res */ major, minor);
}
}
if(0!=_context) {
destroyContextARBImpl(_context);
mapVersionAvailable(reqMajor, reqProfile, major[0], minor[0], ctp);
}
}
private long createContextARBVersions(long share, boolean direct, int ctxOptionFlags,
int majorMax, int minorMax,
int majorMin, int minorMin,
int major[], int minor[]) {
major[0]=majorMax;
minor[0]=minorMax;
long _context=0;
while ( 0==_context &&
GLContext.isValidGLVersion(major[0], minor[0]) &&
( major[0]>majorMin || major[0]==majorMin && minor[0] >=minorMin ) ) {
_context = createContextARBImpl(share, direct, ctxOptionFlags, major[0], minor[0]);
if(0==_context) {
if(!GLContext.decrementGLVersion(major, minor)) break;
}
}
return _context;
}
//----------------------------------------------------------------------
// Managing the actual OpenGL version, usually figured at creation time.
// As a last resort, the GL_VERSION string may be used ..
//
/**
* If major > 0 || minor > 0 : Use passed values, determined at creation time
* If major==0 && minor == 0 : Use GL_VERSION
* Otherwise .. don't touch ..
*/
protected void setContextVersion(int major, int minor, int ctp) {
if (0==ctp) {
throw new GLException("Invalid GL Version "+major+"."+minor+", ctp "+toHexString(ctp));
}
if(major>0 || minor>0) {
if (!GLContext.isValidGLVersion(major, minor)) {
GLException e = new GLException("Invalid GL Version "+major+"."+minor+", ctp "+toHexString(ctp));
throw e;
}
ctxMajorVersion = major;
ctxMinorVersion = minor;
ctxOptions = ctp;
ctxVersionString = getGLVersion(ctxMajorVersion, ctxMinorVersion, ctxOptions, getGL().glGetString(GL.GL_VERSION));
return;
}
if(major==0 && minor==0) {
String versionStr = getGL().glGetString(GL.GL_VERSION);
if(null==versionStr) {
throw new GLException("GL_VERSION is NULL: "+this);
}
ctxOptions = ctp;
// Set version
Version version = new Version(versionStr);
if (version.isValid()) {
ctxMajorVersion = version.getMajor();
ctxMinorVersion = version.getMinor();
ctxVersionString = getGLVersion(ctxMajorVersion, ctxMinorVersion, ctxOptions, versionStr);
return;
}
}
}
//----------------------------------------------------------------------
// Helpers for various context implementations
//
private Object createInstance(GLProfile glp, String suffix, Class[] cstrArgTypes, Object[] cstrArgs) {
return ReflectionUtil.createInstance(glp.getGLImplBaseClassName()+suffix, cstrArgTypes, cstrArgs);
}
/** Create the GL for this context. */
protected GL createGL(GLProfile glp) {
GL gl = (GL) createInstance(glp, "Impl", new Class[] { GLProfile.class, GLContextImpl.class }, new Object[] { glp, this } );
/* FIXME: refactor dependence on Java 2D / JOGL bridge
if (tracker != null) {
gl.setObjectTracker(tracker);
}
*/
return gl;
}
public final ProcAddressTable getGLProcAddressTable() {
return glProcAddressTable;
}
/**
* Shall return the platform extension ProcAddressTable,
* ie for GLXExt, EGLExt, ..
*/
public abstract ProcAddressTable getPlatformExtProcAddressTable();
/**
* Pbuffer support; given that this is a GLContext associated with a
* pbuffer, binds this pbuffer to its texture target.
*/
public abstract void bindPbufferToTexture();
/**
* Pbuffer support; given that this is a GLContext associated with a
* pbuffer, releases this pbuffer from its texture target.
*/
public abstract void releasePbufferFromTexture();
public abstract ByteBuffer glAllocateMemoryNV(int arg0, float arg1, float arg2, float arg3);
public void setSwapInterval(final int interval) {
GLContext current = getCurrent();
if (current != this) {
throw new GLException("This context is not current. Current context: "+current+
", this context "+this);
}
setSwapIntervalImpl(interval);
}
protected int currentSwapInterval = -1; // default: not set yet ..
public int getSwapInterval() {
return currentSwapInterval;
}
protected void setSwapIntervalImpl(final int interval) {
// nop per default ..
}
/** Maps the given "platform-independent" function name to a real function
name. Currently this is only used to map "glAllocateMemoryNV" and
associated routines to wglAllocateMemoryNV / glXAllocateMemoryNV. */
protected String mapToRealGLFunctionName(String glFunctionName) {
Map/*<String, String>*/ map = getFunctionNameMap();
String lookup = ( null != map ) ? (String) map.get(glFunctionName) : null;
if (lookup != null) {
return lookup;
}
return glFunctionName;
}
protected abstract Map/*<String, String>*/ getFunctionNameMap() ;
/** Maps the given "platform-independent" extension name to a real
function name. Currently this is only used to map
"GL_ARB_pbuffer" to "WGL_ARB_pbuffer/GLX_SGIX_pbuffer" and
"GL_ARB_pixel_format" to "WGL_ARB_pixel_format/n.a."
*/
protected String mapToRealGLExtensionName(String glExtensionName) {
Map/*<String, String>*/ map = getExtensionNameMap();
String lookup = ( null != map ) ? (String) map.get(glExtensionName) : null;
if (lookup != null) {
return lookup;
}
return glExtensionName;
}
protected abstract Map/*<String, String>*/ getExtensionNameMap() ;
/** Helper routine which resets a ProcAddressTable generated by the
GLEmitter by looking up anew all of its function pointers. */
protected void resetProcAddressTable(Object table) {
((ProcAddressTable)table).reset(getDrawableImpl().getDynamicLookupHelper() );
}
/**
* Sets the OpenGL implementation class and
* the cache of which GL functions are available for calling through this
* context. See {@link #isFunctionAvailable(String)} for more information on
* the definition of "available".
*
* @param force force the setting, even if is already being set.
* This might be usefull if you change the OpenGL implementation.
*
* @see #setContextVersion
*/
protected void setGLFunctionAvailability(boolean force, int major, int minor, int ctp) {
if(null!=this.gl && null!=glProcAddressTable && !force) {
return; // already done and not forced
}
if(null==this.gl || force) {
setGL(createGL(getGLDrawable().getGLProfile()));
}
updateGLProcAddressTable(major, minor, ctp);
}
/**
* Updates the cache of which GL functions are available for calling through this
* context. See {@link #isFunctionAvailable(String)} for more information on
* the definition of "available".
*
* @see #setContextVersion
*/
protected void updateGLProcAddressTable(int major, int minor, int ctp) {
if(null==this.gl) {
throw new GLException("setGLFunctionAvailability not called yet");
}
if (DEBUG) {
System.err.println(getThreadName() + ": !!! Initializing OpenGL extension address table for " + this);
}
if (glProcAddressTable == null) {
glProcAddressTable = (ProcAddressTable) createInstance(gl.getGLProfile(), "ProcAddressTable",
new Class[] { FunctionAddressResolver.class } ,
new Object[] { new GLProcAddressResolver() } );
// FIXME: cache ProcAddressTables by capability bits so we can
// share them among contexts with the same capabilities
}
resetProcAddressTable(getGLProcAddressTable());
setContextVersion(major, minor, ctp);
extensionAvailability.reset();
}
/**
* Returns true if the specified OpenGL core- or extension-function can be
* successfully called using this GL context given the current host (OpenGL
* <i>client</i>) and display (OpenGL <i>server</i>) configuration.
*
* See {@link GL#isFunctionAvailable(String)} for more details.
*
* @param glFunctionName the name of the OpenGL function (e.g., use
* "glPolygonOffsetEXT" or "glPolygonOffset" to check if the {@link
* javax.media.opengl.GL#glPolygonOffset(float,float)} is available).
*/
public boolean isFunctionAvailable(String glFunctionName) {
if(isCreated()) {
// Check GL 1st (cached)
ProcAddressTable pTable = getGLProcAddressTable();
try {
if(0!=pTable.getAddressFor(glFunctionName)) {
return true;
}
} catch (Exception e) {}
// Check platform extensions 2nd (cached)
pTable = getPlatformExtProcAddressTable();
try {
if(0!=pTable.getAddressFor(glFunctionName)) {
return true;
}
} catch (Exception e) {}
}
// dynamic function lookup at last incl name aliasing (not cached)
DynamicLookupHelper dynLookup = getDrawableImpl().getDynamicLookupHelper();
String tmpBase = GLExtensionNames.normalizeVEN(GLExtensionNames.normalizeARB(glFunctionName, true), true);
long addr = 0;
int variants = GLExtensionNames.getFuncNamePermutationNumber(tmpBase);
for(int i = 0; 0==addr && i < variants; i++) {
String tmp = GLExtensionNames.getFuncNamePermutation(tmpBase, i);
try {
addr = dynLookup.dynamicLookupFunction(tmp);
} catch (Exception e) { }
}
if(0!=addr) {
return true;
}
return false;
}
/**
* Returns true if the specified OpenGL extension can be
* successfully called using this GL context given the current host (OpenGL
* <i>client</i>) and display (OpenGL <i>server</i>) configuration.
*
* See {@link GL#isExtensionAvailable(String)} for more details.
*
* @param glExtensionName the name of the OpenGL extension (e.g.,
* "GL_VERTEX_PROGRAM_ARB").
*/
public boolean isExtensionAvailable(String glExtensionName) {
return extensionAvailability.isExtensionAvailable(mapToRealGLExtensionName(glExtensionName));
}
public String getPlatformExtensionsString() {
return extensionAvailability.getPlatformExtensionsString();
}
public String getGLExtensions() {
return extensionAvailability.getGLExtensions();
}
public boolean isExtensionCacheInitialized() {
return extensionAvailability.isInitialized();
}
/** Indicates which floating-point pbuffer implementation is in
use. Returns one of GLPbuffer.APPLE_FLOAT, GLPbuffer.ATI_FLOAT,
or GLPbuffer.NV_FLOAT. */
public int getFloatingPointMode() throws GLException {
throw new GLException("Not supported on non-pbuffer contexts");
}
/** On some platforms the mismatch between OpenGL's coordinate
system (origin at bottom left) and the window system's
coordinate system (origin at top left) necessitates a vertical
flip of pixels read from offscreen contexts. */
public abstract boolean offscreenImageNeedsVerticalFlip();
/** Only called for offscreen contexts; needed by glReadPixels */
public abstract int getOffscreenContextPixelDataType();
protected static String getThreadName() {
return Thread.currentThread().getName();
}
//----------------------------------------------------------------------
// Helpers for buffer object optimizations
public void setBufferSizeTracker(GLBufferSizeTracker bufferSizeTracker) {
this.bufferSizeTracker = bufferSizeTracker;
}
public GLBufferSizeTracker getBufferSizeTracker() {
return bufferSizeTracker;
}
public GLBufferStateTracker getBufferStateTracker() {
return bufferStateTracker;
}
public GLStateTracker getGLStateTracker() {
return glStateTracker;
}
//---------------------------------------------------------------------------
// Helpers for context optimization where the last context is left
// current on the OpenGL worker thread
//
public boolean isOptimizable() {
return optimizationEnabled;
}
public boolean hasWaiters() {
return lock.hasWaiters();
}
/* FIXME: needed only by the Java 2D / JOGL bridge; refactor
public GLContextImpl(GLContext shareWith) {
this(shareWith, false);
}
public GLContextImpl(GLContext shareWith, boolean dontShareWithJava2D) {
extensionAvailability = new ExtensionAvailabilityCache(this);
GLContext shareContext = shareWith;
if (!dontShareWithJava2D) {
shareContext = Java2D.filterShareContext(shareWith);
}
if (shareContext != null) {
GLContextShareSet.registerSharing(this, shareContext);
}
// Always indicate real behind-the-scenes sharing to track deleted objects
if (shareContext == null) {
shareContext = Java2D.filterShareContext(shareWith);
}
GLContextShareSet.registerForObjectTracking(shareWith, this, shareContext);
GLContextShareSet.registerForBufferObjectSharing(shareWith, this);
// This must occur after the above calls into the
// GLContextShareSet, which set up state needed by the GL object
setGL(createGL());
}
//---------------------------------------------------------------------------
// Helpers for integration with Java2D/OpenGL pipeline when FBOs are
// being used
//
public void setObjectTracker(GLObjectTracker tracker) {
this.tracker = tracker;
}
public GLObjectTracker getObjectTracker() {
return tracker;
}
public void setDeletedObjectTracker(GLObjectTracker deletedObjectTracker) {
this.deletedObjectTracker = deletedObjectTracker;
}
public GLObjectTracker getDeletedObjectTracker() {
return deletedObjectTracker;
}
// Tracks creation and deletion of server-side OpenGL objects when
// the Java2D/OpenGL pipeline is active and using FBOs to render
private GLObjectTracker tracker;
// Supports deletion of these objects when no other context is
// current which can support immediate deletion of them
private GLObjectTracker deletedObjectTracker;
*/
/**
* A class for storing and comparing OpenGL version numbers.
* This only works for desktop OpenGL at the moment.
*/
private static class Version implements Comparable
{
private boolean valid;
private int major, minor, sub;
public Version(int majorRev, int minorRev, int subMinorRev)
{
major = majorRev;
minor = minorRev;
sub = subMinorRev;
}
/**
* @param versionString must be of the form "GL_VERSION_X" or
* "GL_VERSION_X_Y" or "GL_VERSION_X_Y_Z" or "X.Y", where X, Y,
* and Z are integers.
*
* @exception IllegalArgumentException if the argument is not a valid
* OpenGL version identifier
*/
public Version(String versionString)
{
try
{
if (versionString.startsWith("GL_VERSION_"))
{
StringTokenizer tok = new StringTokenizer(versionString, "_");
tok.nextToken(); // GL_
tok.nextToken(); // VERSION_
if (!tok.hasMoreTokens()) { major = 0; return; }
major = Integer.valueOf(tok.nextToken()).intValue();
if (!tok.hasMoreTokens()) { minor = 0; return; }
minor = Integer.valueOf(tok.nextToken()).intValue();
if (!tok.hasMoreTokens()) { sub = 0; return; }
sub = Integer.valueOf(tok.nextToken()).intValue();
}
else
{
int radix = 10;
if (versionString.length() > 2) {
if (Character.isDigit(versionString.charAt(0)) &&
versionString.charAt(1) == '.' &&
Character.isDigit(versionString.charAt(2))) {
major = Character.digit(versionString.charAt(0), radix);
minor = Character.digit(versionString.charAt(2), radix);
// See if there's version-specific information which might
// imply a more recent OpenGL version
StringTokenizer tok = new StringTokenizer(versionString, " ");
if (tok.hasMoreTokens()) {
tok.nextToken();
if (tok.hasMoreTokens()) {
String token = tok.nextToken();
int i = 0;
while (i < token.length() && !Character.isDigit(token.charAt(i))) {
i++;
}
if (i < token.length() - 2 &&
Character.isDigit(token.charAt(i)) &&
token.charAt(i+1) == '.' &&
Character.isDigit(token.charAt(i+2))) {
int altMajor = Character.digit(token.charAt(i), radix);
int altMinor = Character.digit(token.charAt(i+2), radix);
// Avoid possibly confusing situations by putting some
// constraints on the upgrades we do to the major and
// minor versions
if ((altMajor == major && altMinor > minor) ||
altMajor == major + 1) {
major = altMajor;
minor = altMinor;
}
}
}
}
}
}
}
valid = true;
}
catch (Exception e)
{
e.printStackTrace();
// FIXME: refactor desktop OpenGL dependencies and make this
// class work properly for OpenGL ES
System.err.println("ExtensionAvailabilityCache: FunctionAvailabilityCache.Version.<init>: "+e);
major = 1;
minor = 0;
/*
throw (IllegalArgumentException)
new IllegalArgumentException(
"Illegally formatted version identifier: \"" + versionString + "\"")
.initCause(e);
*/
}
}
public boolean isValid() {
return valid;
}
public int compareTo(Object o)
{
Version vo = (Version)o;
if (major > vo.major) return 1;
else if (major < vo.major) return -1;
else if (minor > vo.minor) return 1;
else if (minor < vo.minor) return -1;
else if (sub > vo.sub) return 1;
else if (sub < vo.sub) return -1;
return 0; // they are equal
}
public int getMajor() {
return major;
}
public int getMinor() {
return minor;
}
} // end class Version
}