1 /*
   2  * Copyright (c) 2003, 2014, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.java2d.opengl;
  27 
  28 import java.awt.AlphaComposite;
  29 import java.awt.Composite;
  30 import java.awt.GraphicsEnvironment;
  31 import java.awt.Rectangle;
  32 import java.awt.Transparency;
  33 import java.awt.image.ColorModel;
  34 import java.awt.image.Raster;
  35 import sun.awt.SunHints;
  36 import sun.awt.image.PixelConverter;
  37 import sun.java2d.pipe.hw.AccelSurface;
  38 import sun.java2d.SunGraphics2D;
  39 import sun.java2d.SurfaceData;
  40 import sun.java2d.SurfaceDataProxy;
  41 import sun.java2d.loops.CompositeType;
  42 import sun.java2d.loops.GraphicsPrimitive;
  43 import sun.java2d.loops.MaskFill;
  44 import sun.java2d.loops.SurfaceType;
  45 import sun.java2d.pipe.ParallelogramPipe;
  46 import sun.java2d.pipe.PixelToParallelogramConverter;
  47 import sun.java2d.pipe.RenderBuffer;
  48 import sun.java2d.pipe.TextPipe;
  49 import static sun.java2d.pipe.BufferedOpCodes.*;
  50 import static sun.java2d.opengl.OGLContext.OGLContextCaps.*;
  51 
  52 /**
  53  * This class describes an OpenGL "surface", that is, a region of pixels
  54  * managed via OpenGL.  An OGLSurfaceData can be tagged with one of three
  55  * different SurfaceType objects for the purpose of registering loops, etc.
  56  * This diagram shows the hierarchy of OGL SurfaceTypes:
  57  *
  58  *                               Any
  59  *                             /     \
  60  *                 OpenGLSurface     OpenGLTexture
  61  *                      |
  62  *               OpenGLSurfaceRTT
  63  *
  64  * OpenGLSurface
  65  * This kind of surface can be rendered to using OpenGL APIs.  It is also
  66  * possible to copy an OpenGLSurface to another OpenGLSurface (or to itself).
  67  * This is typically accomplished by calling MakeContextCurrent(dstSD, srcSD)
  68  * and then calling glCopyPixels() (although there are other techniques to
  69  * achieve the same goal).
  70  *
  71  * OpenGLTexture
  72  * This kind of surface cannot be rendered to using OpenGL (in the same sense
  73  * as in OpenGLSurface).  However, it is possible to upload a region of pixels
  74  * to an OpenGLTexture object via glTexSubImage2D().  One can also copy a
  75  * surface of type OpenGLTexture to an OpenGLSurface by binding the texture
  76  * to a quad and then rendering it to the destination surface (this process
  77  * is known as "texture mapping").
  78  *
  79  * OpenGLSurfaceRTT
  80  * This kind of surface can be thought of as a sort of hybrid between
  81  * OpenGLSurface and OpenGLTexture, in that one can render to this kind of
  82  * surface as if it were of type OpenGLSurface, but the process of copying
  83  * this kind of surface to another is more like an OpenGLTexture.  (Note that
  84  * "RTT" stands for "render-to-texture".)
  85  *
  86  * In addition to these SurfaceType variants, we have also defined some
  87  * constants that describe in more detail the type of underlying OpenGL
  88  * surface.  This table helps explain the relationships between those
  89  * "type" constants and their corresponding SurfaceType:
  90  *
  91  * OGL Type          Corresponding SurfaceType
  92  * --------          -------------------------
  93  * WINDOW            OpenGLSurface
  94  * PBUFFER           OpenGLSurface
  95  * TEXTURE           OpenGLTexture
  96  * FLIP_BACKBUFFER   OpenGLSurface
  97  * FBOBJECT          OpenGLSurfaceRTT
  98  */
  99 public abstract class OGLSurfaceData extends SurfaceData
 100     implements AccelSurface {
 101 
 102     /**
 103      * OGL-specific surface types
 104      *
 105      * @see sun.java2d.pipe.hw.AccelSurface
 106      */
 107     public static final int PBUFFER         = RT_PLAIN;
 108     public static final int FBOBJECT        = RT_TEXTURE;
 109 
 110     /**
 111      * Pixel formats
 112      */
 113     public static final int PF_INT_ARGB        = 0;
 114     public static final int PF_INT_ARGB_PRE    = 1;
 115     public static final int PF_INT_RGB         = 2;
 116     public static final int PF_INT_RGBX        = 3;
 117     public static final int PF_INT_BGR         = 4;
 118     public static final int PF_INT_BGRX        = 5;
 119     public static final int PF_USHORT_565_RGB  = 6;
 120     public static final int PF_USHORT_555_RGB  = 7;
 121     public static final int PF_USHORT_555_RGBX = 8;
 122     public static final int PF_BYTE_GRAY       = 9;
 123     public static final int PF_USHORT_GRAY     = 10;
 124     public static final int PF_3BYTE_BGR       = 11;
 125 
 126     /**
 127      * SurfaceTypes
 128      */
 129     private static final String DESC_OPENGL_SURFACE = "OpenGL Surface";
 130     private static final String DESC_OPENGL_SURFACE_RTT =
 131         "OpenGL Surface (render-to-texture)";
 132     private static final String DESC_OPENGL_TEXTURE = "OpenGL Texture";
 133 
 134     static final SurfaceType OpenGLSurface =
 135         SurfaceType.Any.deriveSubType(DESC_OPENGL_SURFACE,
 136                                       PixelConverter.ArgbPre.instance);
 137     static final SurfaceType OpenGLSurfaceRTT =
 138         OpenGLSurface.deriveSubType(DESC_OPENGL_SURFACE_RTT);
 139     static final SurfaceType OpenGLTexture =
 140         SurfaceType.Any.deriveSubType(DESC_OPENGL_TEXTURE);
 141 
 142     /** This will be true if the fbobject system property has been enabled. */
 143     private static boolean isFBObjectEnabled;
 144 
 145     /** This will be true if the lcdshader system property has been enabled.*/
 146     private static boolean isLCDShaderEnabled;
 147 
 148     /** This will be true if the biopshader system property has been enabled.*/
 149     private static boolean isBIOpShaderEnabled;
 150 
 151     /** This will be true if the gradshader system property has been enabled.*/
 152     private static boolean isGradShaderEnabled;
 153 
 154     private OGLGraphicsConfig graphicsConfig;
 155     protected int type;
 156     // these fields are set from the native code when the surface is
 157     // initialized
 158     private int nativeWidth, nativeHeight;
 159 
 160     protected static OGLRenderer oglRenderPipe;
 161     protected static PixelToParallelogramConverter oglTxRenderPipe;
 162     protected static ParallelogramPipe oglAAPgramPipe;
 163     protected static OGLTextRenderer oglTextPipe;
 164     protected static OGLDrawImage oglImagePipe;
 165 
 166     protected native boolean initTexture(long pData,
 167                                          boolean isOpaque, boolean texNonPow2,
 168                                          boolean texRect,
 169                                          int width, int height);
 170     protected native boolean initFBObject(long pData,
 171                                           boolean isOpaque, boolean texNonPow2,
 172                                           boolean texRect,
 173                                           int width, int height);
 174     protected native boolean initFlipBackbuffer(long pData);
 175     protected abstract boolean initPbuffer(long pData, long pConfigInfo,
 176                                            boolean isOpaque,
 177                                            int width, int height);
 178 
 179     private native int getTextureTarget(long pData);
 180     private native int getTextureID(long pData);
 181 
 182     static {
 183         if (!GraphicsEnvironment.isHeadless()) {
 184             // fbobject currently enabled by default; use "false" to disable
 185             String fbo = java.security.AccessController.doPrivileged(
 186                 new sun.security.action.GetPropertyAction(
 187                     "sun.java2d.opengl.fbobject"));
 188             isFBObjectEnabled = !"false".equals(fbo);
 189 
 190             // lcdshader currently enabled by default; use "false" to disable
 191             String lcd = java.security.AccessController.doPrivileged(
 192                 new sun.security.action.GetPropertyAction(
 193                     "sun.java2d.opengl.lcdshader"));
 194             isLCDShaderEnabled = !"false".equals(lcd);
 195 
 196             // biopshader currently enabled by default; use "false" to disable
 197             String biop = java.security.AccessController.doPrivileged(
 198                 new sun.security.action.GetPropertyAction(
 199                     "sun.java2d.opengl.biopshader"));
 200             isBIOpShaderEnabled = !"false".equals(biop);
 201 
 202             // gradshader currently enabled by default; use "false" to disable
 203             String grad = java.security.AccessController.doPrivileged(
 204                 new sun.security.action.GetPropertyAction(
 205                     "sun.java2d.opengl.gradshader"));
 206             isGradShaderEnabled = !"false".equals(grad);
 207 
 208             OGLRenderQueue rq = OGLRenderQueue.getInstance();
 209             oglImagePipe = new OGLDrawImage();
 210             oglTextPipe = new OGLTextRenderer(rq);
 211             oglRenderPipe = new OGLRenderer(rq);
 212             if (GraphicsPrimitive.tracingEnabled()) {
 213                 oglTextPipe = oglTextPipe.traceWrap();
 214                 //The wrapped oglRenderPipe will wrap the AA pipe as well...
 215                 //oglAAPgramPipe = oglRenderPipe.traceWrap();
 216             }
 217             oglAAPgramPipe = oglRenderPipe.getAAParallelogramPipe();
 218             oglTxRenderPipe =
 219                 new PixelToParallelogramConverter(oglRenderPipe,
 220                                                   oglRenderPipe,
 221                                                   1.0, 0.25, true);
 222 
 223             OGLBlitLoops.register();
 224             OGLMaskFill.register();
 225             OGLMaskBlit.register();
 226         }
 227     }
 228 
 229     protected OGLSurfaceData(OGLGraphicsConfig gc,
 230                              ColorModel cm, int type)
 231     {
 232         super(getCustomSurfaceType(type), cm);
 233         this.graphicsConfig = gc;
 234         this.type = type;
 235         setBlitProxyKey(gc.getProxyKey());
 236     }
 237 
 238     @Override
 239     public SurfaceDataProxy makeProxyFor(SurfaceData srcData) {
 240         return OGLSurfaceDataProxy.createProxy(srcData, graphicsConfig);
 241     }
 242 
 243     /**
 244      * Returns the appropriate SurfaceType corresponding to the given OpenGL
 245      * surface type constant (e.g. TEXTURE -> OpenGLTexture).
 246      */
 247     private static SurfaceType getCustomSurfaceType(int oglType) {
 248         switch (oglType) {
 249         case TEXTURE:
 250             return OpenGLTexture;
 251         case FBOBJECT:
 252             return OpenGLSurfaceRTT;
 253         case PBUFFER:
 254         default:
 255             return OpenGLSurface;
 256         }
 257     }
 258 
 259     /**
 260      * Note: This should only be called from the QFT under the AWT lock.
 261      * This method is kept separate from the initSurface() method below just
 262      * to keep the code a bit cleaner.
 263      */
 264     private void initSurfaceNow(int width, int height) {
 265         boolean isOpaque = (getTransparency() == Transparency.OPAQUE);
 266         boolean success = false;
 267 
 268         switch (type) {
 269         case PBUFFER:
 270             success = initPbuffer(getNativeOps(),
 271                                   graphicsConfig.getNativeConfigInfo(),
 272                                   isOpaque,
 273                                   width, height);
 274             break;
 275 
 276         case TEXTURE:
 277             success = initTexture(getNativeOps(),
 278                                   isOpaque, isTexNonPow2Available(),
 279                                   isTexRectAvailable(),
 280                                   width, height);
 281             break;
 282 
 283         case FBOBJECT:
 284             success = initFBObject(getNativeOps(),
 285                                    isOpaque, isTexNonPow2Available(),
 286                                    isTexRectAvailable(),
 287                                    width, height);
 288             break;
 289 
 290         case FLIP_BACKBUFFER:
 291             success = initFlipBackbuffer(getNativeOps());
 292             break;
 293 
 294         default:
 295             break;
 296         }
 297 
 298         if (!success) {
 299             throw new OutOfMemoryError("can't create offscreen surface");
 300         }
 301     }
 302 
 303     /**
 304      * Initializes the appropriate OpenGL offscreen surface based on the value
 305      * of the type parameter.  If the surface creation fails for any reason,
 306      * an OutOfMemoryError will be thrown.
 307      */
 308     protected void initSurface(final int width, final int height) {
 309         OGLRenderQueue rq = OGLRenderQueue.getInstance();
 310         rq.lock();
 311         try {
 312             switch (type) {
 313             case TEXTURE:
 314             case PBUFFER:
 315             case FBOBJECT:
 316                 // need to make sure the context is current before
 317                 // creating the texture (or pbuffer, or fbobject)
 318                 OGLContext.setScratchSurface(graphicsConfig);
 319                 break;
 320             default:
 321                 break;
 322             }
 323             rq.flushAndInvokeNow(new Runnable() {
 324                 public void run() {
 325                     initSurfaceNow(width, height);
 326                 }
 327             });
 328         } finally {
 329             rq.unlock();
 330         }
 331     }
 332 
 333     /**
 334      * Returns the OGLContext for the GraphicsConfig associated with this
 335      * surface.
 336      */
 337     public final OGLContext getContext() {
 338         return graphicsConfig.getContext();
 339     }
 340 
 341     /**
 342      * Returns the OGLGraphicsConfig associated with this surface.
 343      */
 344     final OGLGraphicsConfig getOGLGraphicsConfig() {
 345         return graphicsConfig;
 346     }
 347 
 348     /**
 349      * Returns one of the surface type constants defined above.
 350      */
 351     public final int getType() {
 352         return type;
 353     }
 354 
 355     /**
 356      * If this surface is backed by a texture object, returns the target
 357      * for that texture (either GL_TEXTURE_2D or GL_TEXTURE_RECTANGLE_ARB).
 358      * Otherwise, this method will return zero.
 359      */
 360     public final int getTextureTarget() {
 361         return getTextureTarget(getNativeOps());
 362     }
 363 
 364     /**
 365      * If this surface is backed by a texture object, returns the texture ID
 366      * for that texture.
 367      * Otherwise, this method will return zero.
 368      */
 369     public final int getTextureID() {
 370         return getTextureID(getNativeOps());
 371     }
 372 
 373     /**
 374      * Returns native resource of specified {@code resType} associated with
 375      * this surface.
 376      *
 377      * Specifically, for {@code OGLSurfaceData} this method returns the
 378      * the following:
 379      * <pre>
 380      * TEXTURE              - texture id
 381      * </pre>
 382      *
 383      * Note: the resource returned by this method is only valid on the rendering
 384      * thread.
 385      *
 386      * @return native resource of specified type or 0L if
 387      * such resource doesn't exist or can not be retrieved.
 388      * @see sun.java2d.pipe.hw.AccelSurface#getNativeResource
 389      */
 390     public long getNativeResource(int resType) {
 391         if (resType == TEXTURE) {
 392             return getTextureID();
 393         }
 394         return 0L;
 395     }
 396 
 397     public Raster getRaster(int x, int y, int w, int h) {
 398         throw new InternalError("not implemented yet");
 399     }
 400 
 401     /**
 402      * For now, we can only render LCD text if:
 403      *   - the fragment shader extension is available, and
 404      *   - the source color is opaque, and
 405      *   - blending is SrcOverNoEa or disabled
 406      *   - and the destination is opaque
 407      *
 408      * Eventually, we could enhance the native OGL text rendering code
 409      * and remove the above restrictions, but that would require significantly
 410      * more code just to support a few uncommon cases.
 411      */
 412     public boolean canRenderLCDText(SunGraphics2D sg2d) {
 413         return
 414             graphicsConfig.isCapPresent(CAPS_EXT_LCD_SHADER) &&
 415             sg2d.surfaceData.getTransparency() == Transparency.OPAQUE &&
 416             sg2d.paintState <= SunGraphics2D.PAINT_OPAQUECOLOR &&
 417             (sg2d.compositeState <= SunGraphics2D.COMP_ISCOPY ||
 418              (sg2d.compositeState <= SunGraphics2D.COMP_ALPHA && canHandleComposite(sg2d.composite)));
 419     }
 420 
 421     private boolean canHandleComposite(Composite c) {
 422         if (c instanceof AlphaComposite) {
 423             AlphaComposite ac = (AlphaComposite)c;
 424 
 425             return ac.getRule() == AlphaComposite.SRC_OVER && ac.getAlpha() >= 1f;
 426         }
 427         return false;
 428     }
 429 
 430     public void validatePipe(SunGraphics2D sg2d) {
 431         TextPipe textpipe;
 432         boolean validated = false;
 433 
 434         // OGLTextRenderer handles both AA and non-AA text, but
 435         // only works with the following modes:
 436         // (Note: For LCD text we only enter this code path if
 437         // canRenderLCDText() has already validated that the mode is
 438         // CompositeType.SrcNoEa (opaque color), which will be subsumed
 439         // by the CompositeType.SrcNoEa (any color) test below.)
 440 
 441         if (/* CompositeType.SrcNoEa (any color) */
 442             (sg2d.compositeState <= SunGraphics2D.COMP_ISCOPY &&
 443              sg2d.paintState <= SunGraphics2D.PAINT_ALPHACOLOR)         ||
 444 
 445             /* CompositeType.SrcOver (any color) */
 446             (sg2d.compositeState == SunGraphics2D.COMP_ALPHA   &&
 447              sg2d.paintState <= SunGraphics2D.PAINT_ALPHACOLOR &&
 448              (((AlphaComposite)sg2d.composite).getRule() ==
 449               AlphaComposite.SRC_OVER))                                 ||
 450 
 451             /* CompositeType.Xor (any color) */
 452             (sg2d.compositeState == SunGraphics2D.COMP_XOR &&
 453              sg2d.paintState <= SunGraphics2D.PAINT_ALPHACOLOR))
 454         {
 455             textpipe = oglTextPipe;
 456         } else {
 457             // do this to initialize textpipe correctly; we will attempt
 458             // to override the non-text pipes below
 459             super.validatePipe(sg2d);
 460             textpipe = sg2d.textpipe;
 461             validated = true;
 462         }
 463 
 464         PixelToParallelogramConverter txPipe = null;
 465         OGLRenderer nonTxPipe = null;
 466 
 467         if (sg2d.antialiasHint != SunHints.INTVAL_ANTIALIAS_ON) {
 468             if (sg2d.paintState <= SunGraphics2D.PAINT_ALPHACOLOR) {
 469                 if (sg2d.compositeState <= SunGraphics2D.COMP_XOR) {
 470                     txPipe = oglTxRenderPipe;
 471                     nonTxPipe = oglRenderPipe;
 472                 }
 473             } else if (sg2d.compositeState <= SunGraphics2D.COMP_ALPHA) {
 474                 if (OGLPaints.isValid(sg2d)) {
 475                     txPipe = oglTxRenderPipe;
 476                     nonTxPipe = oglRenderPipe;
 477                 }
 478                 // custom paints handled by super.validatePipe() below
 479             }
 480         } else {
 481             if (sg2d.paintState <= SunGraphics2D.PAINT_ALPHACOLOR) {
 482                 if (graphicsConfig.isCapPresent(CAPS_PS30) &&
 483                     (sg2d.imageComp == CompositeType.SrcOverNoEa ||
 484                      sg2d.imageComp == CompositeType.SrcOver))
 485                 {
 486                     if (!validated) {
 487                         super.validatePipe(sg2d);
 488                         validated = true;
 489                     }
 490                     PixelToParallelogramConverter aaConverter =
 491                         new PixelToParallelogramConverter(sg2d.shapepipe,
 492                                                           oglAAPgramPipe,
 493                                                           1.0/8.0, 0.499,
 494                                                           false);
 495                     sg2d.drawpipe = aaConverter;
 496                     sg2d.fillpipe = aaConverter;
 497                     sg2d.shapepipe = aaConverter;
 498                 } else if (sg2d.compositeState == SunGraphics2D.COMP_XOR) {
 499                     // install the solid pipes when AA and XOR are both enabled
 500                     txPipe = oglTxRenderPipe;
 501                     nonTxPipe = oglRenderPipe;
 502                 }
 503             }
 504             // other cases handled by super.validatePipe() below
 505         }
 506 
 507         if (txPipe != null) {
 508             if (sg2d.transformState >= SunGraphics2D.TRANSFORM_TRANSLATESCALE) {
 509                 sg2d.drawpipe = txPipe;
 510                 sg2d.fillpipe = txPipe;
 511             } else if (sg2d.strokeState != SunGraphics2D.STROKE_THIN) {
 512                 sg2d.drawpipe = txPipe;
 513                 sg2d.fillpipe = nonTxPipe;
 514             } else {
 515                 sg2d.drawpipe = nonTxPipe;
 516                 sg2d.fillpipe = nonTxPipe;
 517             }
 518             // Note that we use the transforming pipe here because it
 519             // will examine the shape and possibly perform an optimized
 520             // operation if it can be simplified.  The simplifications
 521             // will be valid for all STROKE and TRANSFORM types.
 522             sg2d.shapepipe = txPipe;
 523         } else {
 524             if (!validated) {
 525                 super.validatePipe(sg2d);
 526             }
 527         }
 528 
 529         // install the text pipe based on our earlier decision
 530         sg2d.textpipe = textpipe;
 531 
 532         // always override the image pipe with the specialized OGL pipe
 533         sg2d.imagepipe = oglImagePipe;
 534     }
 535 
 536     @Override
 537     protected MaskFill getMaskFill(SunGraphics2D sg2d) {
 538         if (sg2d.paintState > SunGraphics2D.PAINT_ALPHACOLOR) {
 539             /*
 540              * We can only accelerate non-Color MaskFill operations if
 541              * all of the following conditions hold true:
 542              *   - there is an implementation for the given paintState
 543              *   - the current Paint can be accelerated for this destination
 544              *   - multitexturing is available (since we need to modulate
 545              *     the alpha mask texture with the paint texture)
 546              *
 547              * In all other cases, we return null, in which case the
 548              * validation code will choose a more general software-based loop.
 549              */
 550             if (!OGLPaints.isValid(sg2d) ||
 551                 !graphicsConfig.isCapPresent(CAPS_MULTITEXTURE))
 552             {
 553                 return null;
 554             }
 555         }
 556         return super.getMaskFill(sg2d);
 557     }
 558 
 559     public boolean copyArea(SunGraphics2D sg2d,
 560                             int x, int y, int w, int h, int dx, int dy)
 561     {
 562         if (sg2d.transformState < SunGraphics2D.TRANSFORM_TRANSLATESCALE &&
 563             sg2d.compositeState < SunGraphics2D.COMP_XOR)
 564         {
 565             x += sg2d.transX;
 566             y += sg2d.transY;
 567 
 568             oglRenderPipe.copyArea(sg2d, x, y, w, h, dx, dy);
 569 
 570             return true;
 571         }
 572         return false;
 573     }
 574 
 575     public void flush() {
 576         invalidate();
 577         OGLRenderQueue rq = OGLRenderQueue.getInstance();
 578         rq.lock();
 579         try {
 580             // make sure we have a current context before
 581             // disposing the native resources (e.g. texture object)
 582             OGLContext.setScratchSurface(graphicsConfig);
 583 
 584             RenderBuffer buf = rq.getBuffer();
 585             rq.ensureCapacityAndAlignment(12, 4);
 586             buf.putInt(FLUSH_SURFACE);
 587             buf.putLong(getNativeOps());
 588 
 589             // this call is expected to complete synchronously, so flush now
 590             rq.flushNow();
 591         } finally {
 592             rq.unlock();
 593         }
 594     }
 595 
 596     /**
 597      * Disposes the native resources associated with the given OGLSurfaceData
 598      * (referenced by the pData parameter).  This method is invoked from
 599      * the native Dispose() method from the Disposer thread when the
 600      * Java-level OGLSurfaceData object is about to go away.  Note that we
 601      * also pass a reference to the native GLX/WGLGraphicsConfigInfo
 602      * (pConfigInfo) for the purposes of making a context current.
 603      */
 604     static void dispose(long pData, long pConfigInfo) {
 605         OGLRenderQueue rq = OGLRenderQueue.getInstance();
 606         rq.lock();
 607         try {
 608             // make sure we have a current context before
 609             // disposing the native resources (e.g. texture object)
 610             OGLContext.setScratchSurface(pConfigInfo);
 611 
 612             RenderBuffer buf = rq.getBuffer();
 613             rq.ensureCapacityAndAlignment(12, 4);
 614             buf.putInt(DISPOSE_SURFACE);
 615             buf.putLong(pData);
 616 
 617             // this call is expected to complete synchronously, so flush now
 618             rq.flushNow();
 619         } finally {
 620             rq.unlock();
 621         }
 622     }
 623 
 624     static void swapBuffers(long window) {
 625         OGLRenderQueue rq = OGLRenderQueue.getInstance();
 626         rq.lock();
 627         try {
 628             RenderBuffer buf = rq.getBuffer();
 629             rq.ensureCapacityAndAlignment(12, 4);
 630             buf.putInt(SWAP_BUFFERS);
 631             buf.putLong(window);
 632             rq.flushNow();
 633         } finally {
 634             rq.unlock();
 635         }
 636     }
 637 
 638     /**
 639      * Returns true if OpenGL textures can have non-power-of-two dimensions
 640      * when using the basic GL_TEXTURE_2D target.
 641      */
 642     boolean isTexNonPow2Available() {
 643         return graphicsConfig.isCapPresent(CAPS_TEXNONPOW2);
 644     }
 645 
 646     /**
 647      * Returns true if OpenGL textures can have non-power-of-two dimensions
 648      * when using the GL_TEXTURE_RECTANGLE_ARB target (only available when the
 649      * GL_ARB_texture_rectangle extension is present).
 650      */
 651     boolean isTexRectAvailable() {
 652         return graphicsConfig.isCapPresent(CAPS_EXT_TEXRECT);
 653     }
 654 
 655     public Rectangle getNativeBounds() {
 656         OGLRenderQueue rq = OGLRenderQueue.getInstance();
 657         rq.lock();
 658         try {
 659             return new Rectangle(nativeWidth, nativeHeight);
 660         } finally {
 661             rq.unlock();
 662         }
 663     }
 664 
 665     /**
 666      * Returns true if the surface is an on-screen window surface or
 667      * a FBO texture attached to an on-screen CALayer.
 668      *
 669      * Needed by Mac OS X port.
 670      */
 671     boolean isOnScreen() {
 672         return getType() == WINDOW;
 673     }
 674 }
--- EOF ---