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.GraphicsEnvironment;
  30 import java.awt.Rectangle;
  31 import java.awt.Transparency;
  32 import java.awt.image.ColorModel;
  33 import java.awt.image.Raster;
  34 import sun.awt.SunHints;
  35 import sun.awt.image.PixelConverter;
  36 import sun.java2d.pipe.hw.AccelSurface;
  37 import sun.java2d.SunGraphics2D;
  38 import sun.java2d.SurfaceData;
  39 import sun.java2d.SurfaceDataProxy;
  40 import sun.java2d.loops.CompositeType;
  41 import sun.java2d.loops.GraphicsPrimitive;
  42 import sun.java2d.loops.MaskFill;
  43 import sun.java2d.loops.SurfaceType;
  44 import sun.java2d.pipe.ParallelogramPipe;
  45 import sun.java2d.pipe.PixelToParallelogramConverter;
  46 import sun.java2d.pipe.RenderBuffer;
  47 import sun.java2d.pipe.TextPipe;
  48 import static sun.java2d.pipe.BufferedOpCodes.*;
  49 import static sun.java2d.opengl.OGLContext.OGLContextCaps.*;
  50 
  51 /**
  52  * This class describes an OpenGL "surface", that is, a region of pixels
  53  * managed via OpenGL.  An OGLSurfaceData can be tagged with one of three
  54  * different SurfaceType objects for the purpose of registering loops, etc.
  55  * This diagram shows the hierarchy of OGL SurfaceTypes:
  56  *
  57  *                               Any
  58  *                             /     \
  59  *                 OpenGLSurface     OpenGLTexture
  60  *                      |
  61  *               OpenGLSurfaceRTT
  62  *
  63  * OpenGLSurface
  64  * This kind of surface can be rendered to using OpenGL APIs.  It is also
  65  * possible to copy an OpenGLSurface to another OpenGLSurface (or to itself).
  66  * This is typically accomplished by calling MakeContextCurrent(dstSD, srcSD)
  67  * and then calling glCopyPixels() (although there are other techniques to
  68  * achieve the same goal).
  69  *
  70  * OpenGLTexture
  71  * This kind of surface cannot be rendered to using OpenGL (in the same sense
  72  * as in OpenGLSurface).  However, it is possible to upload a region of pixels
  73  * to an OpenGLTexture object via glTexSubImage2D().  One can also copy a
  74  * surface of type OpenGLTexture to an OpenGLSurface by binding the texture
  75  * to a quad and then rendering it to the destination surface (this process
  76  * is known as "texture mapping").
  77  *
  78  * OpenGLSurfaceRTT
  79  * This kind of surface can be thought of as a sort of hybrid between
  80  * OpenGLSurface and OpenGLTexture, in that one can render to this kind of
  81  * surface as if it were of type OpenGLSurface, but the process of copying
  82  * this kind of surface to another is more like an OpenGLTexture.  (Note that
  83  * "RTT" stands for "render-to-texture".)
  84  *
  85  * In addition to these SurfaceType variants, we have also defined some
  86  * constants that describe in more detail the type of underlying OpenGL
  87  * surface.  This table helps explain the relationships between those
  88  * "type" constants and their corresponding SurfaceType:
  89  *
  90  * OGL Type          Corresponding SurfaceType
  91  * --------          -------------------------
  92  * WINDOW            OpenGLSurface
  93  * PBUFFER           OpenGLSurface
  94  * TEXTURE           OpenGLTexture
  95  * FLIP_BACKBUFFER   OpenGLSurface
  96  * FBOBJECT          OpenGLSurfaceRTT
  97  */
  98 public abstract class OGLSurfaceData extends SurfaceData
  99     implements AccelSurface {
 100 
 101     /**
 102      * OGL-specific surface types
 103      *
 104      * @see sun.java2d.pipe.hw.AccelSurface
 105      */
 106     public static final int PBUFFER         = RT_PLAIN;
 107     public static final int FBOBJECT        = RT_TEXTURE;
 108 
 109     /**
 110      * Pixel formats
 111      */
 112     public static final int PF_INT_ARGB        = 0;
 113     public static final int PF_INT_ARGB_PRE    = 1;
 114     public static final int PF_INT_RGB         = 2;
 115     public static final int PF_INT_RGBX        = 3;
 116     public static final int PF_INT_BGR         = 4;
 117     public static final int PF_INT_BGRX        = 5;
 118     public static final int PF_USHORT_565_RGB  = 6;
 119     public static final int PF_USHORT_555_RGB  = 7;
 120     public static final int PF_USHORT_555_RGBX = 8;
 121     public static final int PF_BYTE_GRAY       = 9;
 122     public static final int PF_USHORT_GRAY     = 10;
 123     public static final int PF_3BYTE_BGR       = 11;
 124 
 125     /**
 126      * SurfaceTypes
 127      */
 128     private static final String DESC_OPENGL_SURFACE = "OpenGL Surface";
 129     private static final String DESC_OPENGL_SURFACE_RTT =
 130         "OpenGL Surface (render-to-texture)";
 131     private static final String DESC_OPENGL_TEXTURE = "OpenGL Texture";
 132 
 133     static final SurfaceType OpenGLSurface =
 134         SurfaceType.Any.deriveSubType(DESC_OPENGL_SURFACE,
 135                                       PixelConverter.ArgbPre.instance);
 136     static final SurfaceType OpenGLSurfaceRTT =
 137         OpenGLSurface.deriveSubType(DESC_OPENGL_SURFACE_RTT);
 138     static final SurfaceType OpenGLTexture =
 139         SurfaceType.Any.deriveSubType(DESC_OPENGL_TEXTURE);
 140 
 141     /** This will be true if the fbobject system property has been enabled. */
 142     private static boolean isFBObjectEnabled;
 143 
 144     /** This will be true if the lcdshader system property has been enabled.*/
 145     private static boolean isLCDShaderEnabled;
 146 
 147     /** This will be true if the biopshader system property has been enabled.*/
 148     private static boolean isBIOpShaderEnabled;
 149 
 150     /** This will be true if the gradshader system property has been enabled.*/
 151     private static boolean isGradShaderEnabled;
 152 
 153     private OGLGraphicsConfig graphicsConfig;
 154     protected int type;
 155     // these fields are set from the native code when the surface is
 156     // initialized
 157     private int nativeWidth, nativeHeight;
 158 
 159     protected static OGLRenderer oglRenderPipe;
 160     protected static PixelToParallelogramConverter oglTxRenderPipe;
 161     protected static ParallelogramPipe oglAAPgramPipe;
 162     protected static OGLTextRenderer oglTextPipe;
 163     protected static OGLDrawImage oglImagePipe;
 164 
 165     protected native boolean initTexture(long pData,
 166                                          boolean isOpaque, boolean texNonPow2,
 167                                          boolean texRect,
 168                                          int width, int height);
 169     protected native boolean initFBObject(long pData,
 170                                           boolean isOpaque, boolean texNonPow2,
 171                                           boolean texRect,
 172                                           int width, int height);
 173     protected native boolean initFlipBackbuffer(long pData);
 174     protected abstract boolean initPbuffer(long pData, long pConfigInfo,
 175                                            boolean isOpaque,
 176                                            int width, int height);
 177 
 178     private native int getTextureTarget(long pData);
 179     private native int getTextureID(long pData);
 180 
 181     static {
 182         if (!GraphicsEnvironment.isHeadless()) {
 183             // fbobject currently enabled by default; use "false" to disable
 184             String fbo = java.security.AccessController.doPrivileged(
 185                 new sun.security.action.GetPropertyAction(
 186                     "sun.java2d.opengl.fbobject"));
 187             isFBObjectEnabled = !"false".equals(fbo);
 188 
 189             // lcdshader currently enabled by default; use "false" to disable
 190             String lcd = java.security.AccessController.doPrivileged(
 191                 new sun.security.action.GetPropertyAction(
 192                     "sun.java2d.opengl.lcdshader"));
 193             isLCDShaderEnabled = !"false".equals(lcd);
 194 
 195             // biopshader currently enabled by default; use "false" to disable
 196             String biop = java.security.AccessController.doPrivileged(
 197                 new sun.security.action.GetPropertyAction(
 198                     "sun.java2d.opengl.biopshader"));
 199             isBIOpShaderEnabled = !"false".equals(biop);
 200 
 201             // gradshader currently enabled by default; use "false" to disable
 202             String grad = java.security.AccessController.doPrivileged(
 203                 new sun.security.action.GetPropertyAction(
 204                     "sun.java2d.opengl.gradshader"));
 205             isGradShaderEnabled = !"false".equals(grad);
 206 
 207             OGLRenderQueue rq = OGLRenderQueue.getInstance();
 208             oglImagePipe = new OGLDrawImage();
 209             oglTextPipe = new OGLTextRenderer(rq);
 210             oglRenderPipe = new OGLRenderer(rq);
 211             if (GraphicsPrimitive.tracingEnabled()) {
 212                 oglTextPipe = oglTextPipe.traceWrap();
 213                 //The wrapped oglRenderPipe will wrap the AA pipe as well...
 214                 //oglAAPgramPipe = oglRenderPipe.traceWrap();
 215             }
 216             oglAAPgramPipe = oglRenderPipe.getAAParallelogramPipe();
 217             oglTxRenderPipe =
 218                 new PixelToParallelogramConverter(oglRenderPipe,
 219                                                   oglRenderPipe,
 220                                                   1.0, 0.25, true);
 221 
 222             OGLBlitLoops.register();
 223             OGLMaskFill.register();
 224             OGLMaskBlit.register();
 225         }
 226     }
 227 
 228     protected OGLSurfaceData(OGLGraphicsConfig gc,
 229                              ColorModel cm, int type)
 230     {
 231         super(getCustomSurfaceType(type), cm);
 232         this.graphicsConfig = gc;
 233         this.type = type;
 234         setBlitProxyKey(gc.getProxyKey());
 235     }
 236 
 237     @Override
 238     public SurfaceDataProxy makeProxyFor(SurfaceData srcData) {
 239         return OGLSurfaceDataProxy.createProxy(srcData, graphicsConfig);
 240     }
 241 
 242     /**
 243      * Returns the appropriate SurfaceType corresponding to the given OpenGL
 244      * surface type constant (e.g. TEXTURE -> OpenGLTexture).
 245      */
 246     private static SurfaceType getCustomSurfaceType(int oglType) {
 247         switch (oglType) {
 248         case TEXTURE:
 249             return OpenGLTexture;
 250         case FBOBJECT:
 251             return OpenGLSurfaceRTT;
 252         case PBUFFER:
 253         default:
 254             return OpenGLSurface;
 255         }
 256     }
 257 
 258     /**
 259      * Note: This should only be called from the QFT under the AWT lock.
 260      * This method is kept separate from the initSurface() method below just
 261      * to keep the code a bit cleaner.
 262      */
 263     private void initSurfaceNow(int width, int height) {
 264         boolean isOpaque = (getTransparency() == Transparency.OPAQUE);
 265         boolean success = false;
 266 
 267         switch (type) {
 268         case PBUFFER:
 269             success = initPbuffer(getNativeOps(),
 270                                   graphicsConfig.getNativeConfigInfo(),
 271                                   isOpaque,
 272                                   width, height);
 273             break;
 274 
 275         case TEXTURE:
 276             success = initTexture(getNativeOps(),
 277                                   isOpaque, isTexNonPow2Available(),
 278                                   isTexRectAvailable(),
 279                                   width, height);
 280             break;
 281 
 282         case FBOBJECT:
 283             success = initFBObject(getNativeOps(),
 284                                    isOpaque, isTexNonPow2Available(),
 285                                    isTexRectAvailable(),
 286                                    width, height);
 287             break;
 288 
 289         case FLIP_BACKBUFFER:
 290             success = initFlipBackbuffer(getNativeOps());
 291             break;
 292 
 293         default:
 294             break;
 295         }
 296 
 297         if (!success) {
 298             throw new OutOfMemoryError("can't create offscreen surface");
 299         }
 300     }
 301 
 302     /**
 303      * Initializes the appropriate OpenGL offscreen surface based on the value
 304      * of the type parameter.  If the surface creation fails for any reason,
 305      * an OutOfMemoryError will be thrown.
 306      */
 307     protected void initSurface(final int width, final int height) {
 308         OGLRenderQueue rq = OGLRenderQueue.getInstance();
 309         rq.lock();
 310         try {
 311             switch (type) {
 312             case TEXTURE:
 313             case PBUFFER:
 314             case FBOBJECT:
 315                 // need to make sure the context is current before
 316                 // creating the texture (or pbuffer, or fbobject)
 317                 OGLContext.setScratchSurface(graphicsConfig);
 318                 break;
 319             default:
 320                 break;
 321             }
 322             rq.flushAndInvokeNow(new Runnable() {
 323                 public void run() {
 324                     initSurfaceNow(width, height);
 325                 }
 326             });
 327         } finally {
 328             rq.unlock();
 329         }
 330     }
 331 
 332     /**
 333      * Returns the OGLContext for the GraphicsConfig associated with this
 334      * surface.
 335      */
 336     public final OGLContext getContext() {
 337         return graphicsConfig.getContext();
 338     }
 339 
 340     /**
 341      * Returns the OGLGraphicsConfig associated with this surface.
 342      */
 343     final OGLGraphicsConfig getOGLGraphicsConfig() {
 344         return graphicsConfig;
 345     }
 346 
 347     /**
 348      * Returns one of the surface type constants defined above.
 349      */
 350     public final int getType() {
 351         return type;
 352     }
 353 
 354     /**
 355      * If this surface is backed by a texture object, returns the target
 356      * for that texture (either GL_TEXTURE_2D or GL_TEXTURE_RECTANGLE_ARB).
 357      * Otherwise, this method will return zero.
 358      */
 359     public final int getTextureTarget() {
 360         return getTextureTarget(getNativeOps());
 361     }
 362 
 363     /**
 364      * If this surface is backed by a texture object, returns the texture ID
 365      * for that texture.
 366      * Otherwise, this method will return zero.
 367      */
 368     public final int getTextureID() {
 369         return getTextureID(getNativeOps());
 370     }
 371 
 372     /**
 373      * Returns native resource of specified {@code resType} associated with
 374      * this surface.
 375      *
 376      * Specifically, for {@code OGLSurfaceData} this method returns the
 377      * the following:
 378      * <pre>
 379      * TEXTURE              - texture id
 380      * </pre>
 381      *
 382      * Note: the resource returned by this method is only valid on the rendering
 383      * thread.
 384      *
 385      * @return native resource of specified type or 0L if
 386      * such resource doesn't exist or can not be retrieved.
 387      * @see sun.java2d.pipe.hw.AccelSurface#getNativeResource
 388      */
 389     public long getNativeResource(int resType) {
 390         if (resType == TEXTURE) {
 391             return getTextureID();
 392         }
 393         return 0L;
 394     }
 395 
 396     public Raster getRaster(int x, int y, int w, int h) {
 397         throw new InternalError("not implemented yet");
 398     }
 399 
 400     /**
 401      * For now, we can only render LCD text if:
 402      *   - the fragment shader extension is available, and
 403      *   - blending is disabled, and
 404      *   - the source color is opaque
 405      *   - and the destination is opaque
 406      *
 407      * Eventually, we could enhance the native OGL text rendering code
 408      * and remove the above restrictions, but that would require significantly
 409      * more code just to support a few uncommon cases.
 410      */
 411     public boolean canRenderLCDText(SunGraphics2D sg2d) {
 412         return
 413             graphicsConfig.isCapPresent(CAPS_EXT_LCD_SHADER) &&
 414             sg2d.compositeState <= SunGraphics2D.COMP_ISCOPY &&
 415             sg2d.paintState <= SunGraphics2D.PAINT_OPAQUECOLOR &&
 416             sg2d.surfaceData.getTransparency() == Transparency.OPAQUE;










 417     }
 418 
 419     public void validatePipe(SunGraphics2D sg2d) {
 420         TextPipe textpipe;
 421         boolean validated = false;
 422 
 423         // OGLTextRenderer handles both AA and non-AA text, but
 424         // only works with the following modes:
 425         // (Note: For LCD text we only enter this code path if
 426         // canRenderLCDText() has already validated that the mode is
 427         // CompositeType.SrcNoEa (opaque color), which will be subsumed
 428         // by the CompositeType.SrcNoEa (any color) test below.)
 429 
 430         if (/* CompositeType.SrcNoEa (any color) */
 431             (sg2d.compositeState <= SunGraphics2D.COMP_ISCOPY &&
 432              sg2d.paintState <= SunGraphics2D.PAINT_ALPHACOLOR)         ||
 433 
 434             /* CompositeType.SrcOver (any color) */
 435             (sg2d.compositeState == SunGraphics2D.COMP_ALPHA   &&
 436              sg2d.paintState <= SunGraphics2D.PAINT_ALPHACOLOR &&
 437              (((AlphaComposite)sg2d.composite).getRule() ==
 438               AlphaComposite.SRC_OVER))                                 ||
 439 
 440             /* CompositeType.Xor (any color) */
 441             (sg2d.compositeState == SunGraphics2D.COMP_XOR &&
 442              sg2d.paintState <= SunGraphics2D.PAINT_ALPHACOLOR))
 443         {
 444             textpipe = oglTextPipe;
 445         } else {
 446             // do this to initialize textpipe correctly; we will attempt
 447             // to override the non-text pipes below
 448             super.validatePipe(sg2d);
 449             textpipe = sg2d.textpipe;
 450             validated = true;
 451         }
 452 
 453         PixelToParallelogramConverter txPipe = null;
 454         OGLRenderer nonTxPipe = null;
 455 
 456         if (sg2d.antialiasHint != SunHints.INTVAL_ANTIALIAS_ON) {
 457             if (sg2d.paintState <= SunGraphics2D.PAINT_ALPHACOLOR) {
 458                 if (sg2d.compositeState <= SunGraphics2D.COMP_XOR) {
 459                     txPipe = oglTxRenderPipe;
 460                     nonTxPipe = oglRenderPipe;
 461                 }
 462             } else if (sg2d.compositeState <= SunGraphics2D.COMP_ALPHA) {
 463                 if (OGLPaints.isValid(sg2d)) {
 464                     txPipe = oglTxRenderPipe;
 465                     nonTxPipe = oglRenderPipe;
 466                 }
 467                 // custom paints handled by super.validatePipe() below
 468             }
 469         } else {
 470             if (sg2d.paintState <= SunGraphics2D.PAINT_ALPHACOLOR) {
 471                 if (graphicsConfig.isCapPresent(CAPS_PS30) &&
 472                     (sg2d.imageComp == CompositeType.SrcOverNoEa ||
 473                      sg2d.imageComp == CompositeType.SrcOver))
 474                 {
 475                     if (!validated) {
 476                         super.validatePipe(sg2d);
 477                         validated = true;
 478                     }
 479                     PixelToParallelogramConverter aaConverter =
 480                         new PixelToParallelogramConverter(sg2d.shapepipe,
 481                                                           oglAAPgramPipe,
 482                                                           1.0/8.0, 0.499,
 483                                                           false);
 484                     sg2d.drawpipe = aaConverter;
 485                     sg2d.fillpipe = aaConverter;
 486                     sg2d.shapepipe = aaConverter;
 487                 } else if (sg2d.compositeState == SunGraphics2D.COMP_XOR) {
 488                     // install the solid pipes when AA and XOR are both enabled
 489                     txPipe = oglTxRenderPipe;
 490                     nonTxPipe = oglRenderPipe;
 491                 }
 492             }
 493             // other cases handled by super.validatePipe() below
 494         }
 495 
 496         if (txPipe != null) {
 497             if (sg2d.transformState >= SunGraphics2D.TRANSFORM_TRANSLATESCALE) {
 498                 sg2d.drawpipe = txPipe;
 499                 sg2d.fillpipe = txPipe;
 500             } else if (sg2d.strokeState != SunGraphics2D.STROKE_THIN) {
 501                 sg2d.drawpipe = txPipe;
 502                 sg2d.fillpipe = nonTxPipe;
 503             } else {
 504                 sg2d.drawpipe = nonTxPipe;
 505                 sg2d.fillpipe = nonTxPipe;
 506             }
 507             // Note that we use the transforming pipe here because it
 508             // will examine the shape and possibly perform an optimized
 509             // operation if it can be simplified.  The simplifications
 510             // will be valid for all STROKE and TRANSFORM types.
 511             sg2d.shapepipe = txPipe;
 512         } else {
 513             if (!validated) {
 514                 super.validatePipe(sg2d);
 515             }
 516         }
 517 
 518         // install the text pipe based on our earlier decision
 519         sg2d.textpipe = textpipe;
 520 
 521         // always override the image pipe with the specialized OGL pipe
 522         sg2d.imagepipe = oglImagePipe;
 523     }
 524 
 525     @Override
 526     protected MaskFill getMaskFill(SunGraphics2D sg2d) {
 527         if (sg2d.paintState > SunGraphics2D.PAINT_ALPHACOLOR) {
 528             /*
 529              * We can only accelerate non-Color MaskFill operations if
 530              * all of the following conditions hold true:
 531              *   - there is an implementation for the given paintState
 532              *   - the current Paint can be accelerated for this destination
 533              *   - multitexturing is available (since we need to modulate
 534              *     the alpha mask texture with the paint texture)
 535              *
 536              * In all other cases, we return null, in which case the
 537              * validation code will choose a more general software-based loop.
 538              */
 539             if (!OGLPaints.isValid(sg2d) ||
 540                 !graphicsConfig.isCapPresent(CAPS_MULTITEXTURE))
 541             {
 542                 return null;
 543             }
 544         }
 545         return super.getMaskFill(sg2d);
 546     }
 547 
 548     public boolean copyArea(SunGraphics2D sg2d,
 549                             int x, int y, int w, int h, int dx, int dy)
 550     {
 551         if (sg2d.transformState < SunGraphics2D.TRANSFORM_TRANSLATESCALE &&
 552             sg2d.compositeState < SunGraphics2D.COMP_XOR)
 553         {
 554             x += sg2d.transX;
 555             y += sg2d.transY;
 556 
 557             oglRenderPipe.copyArea(sg2d, x, y, w, h, dx, dy);
 558 
 559             return true;
 560         }
 561         return false;
 562     }
 563 
 564     public void flush() {
 565         invalidate();
 566         OGLRenderQueue rq = OGLRenderQueue.getInstance();
 567         rq.lock();
 568         try {
 569             // make sure we have a current context before
 570             // disposing the native resources (e.g. texture object)
 571             OGLContext.setScratchSurface(graphicsConfig);
 572 
 573             RenderBuffer buf = rq.getBuffer();
 574             rq.ensureCapacityAndAlignment(12, 4);
 575             buf.putInt(FLUSH_SURFACE);
 576             buf.putLong(getNativeOps());
 577 
 578             // this call is expected to complete synchronously, so flush now
 579             rq.flushNow();
 580         } finally {
 581             rq.unlock();
 582         }
 583     }
 584 
 585     /**
 586      * Disposes the native resources associated with the given OGLSurfaceData
 587      * (referenced by the pData parameter).  This method is invoked from
 588      * the native Dispose() method from the Disposer thread when the
 589      * Java-level OGLSurfaceData object is about to go away.  Note that we
 590      * also pass a reference to the native GLX/WGLGraphicsConfigInfo
 591      * (pConfigInfo) for the purposes of making a context current.
 592      */
 593     static void dispose(long pData, long pConfigInfo) {
 594         OGLRenderQueue rq = OGLRenderQueue.getInstance();
 595         rq.lock();
 596         try {
 597             // make sure we have a current context before
 598             // disposing the native resources (e.g. texture object)
 599             OGLContext.setScratchSurface(pConfigInfo);
 600 
 601             RenderBuffer buf = rq.getBuffer();
 602             rq.ensureCapacityAndAlignment(12, 4);
 603             buf.putInt(DISPOSE_SURFACE);
 604             buf.putLong(pData);
 605 
 606             // this call is expected to complete synchronously, so flush now
 607             rq.flushNow();
 608         } finally {
 609             rq.unlock();
 610         }
 611     }
 612 
 613     static void swapBuffers(long window) {
 614         OGLRenderQueue rq = OGLRenderQueue.getInstance();
 615         rq.lock();
 616         try {
 617             RenderBuffer buf = rq.getBuffer();
 618             rq.ensureCapacityAndAlignment(12, 4);
 619             buf.putInt(SWAP_BUFFERS);
 620             buf.putLong(window);
 621             rq.flushNow();
 622         } finally {
 623             rq.unlock();
 624         }
 625     }
 626 
 627     /**
 628      * Returns true if OpenGL textures can have non-power-of-two dimensions
 629      * when using the basic GL_TEXTURE_2D target.
 630      */
 631     boolean isTexNonPow2Available() {
 632         return graphicsConfig.isCapPresent(CAPS_TEXNONPOW2);
 633     }
 634 
 635     /**
 636      * Returns true if OpenGL textures can have non-power-of-two dimensions
 637      * when using the GL_TEXTURE_RECTANGLE_ARB target (only available when the
 638      * GL_ARB_texture_rectangle extension is present).
 639      */
 640     boolean isTexRectAvailable() {
 641         return graphicsConfig.isCapPresent(CAPS_EXT_TEXRECT);
 642     }
 643 
 644     public Rectangle getNativeBounds() {
 645         OGLRenderQueue rq = OGLRenderQueue.getInstance();
 646         rq.lock();
 647         try {
 648             return new Rectangle(nativeWidth, nativeHeight);
 649         } finally {
 650             rq.unlock();
 651         }
 652     }
 653 
 654     /**
 655      * Returns true if the surface is an on-screen window surface or
 656      * a FBO texture attached to an on-screen CALayer.
 657      *
 658      * Needed by Mac OS X port.
 659      */
 660     boolean isOnScreen() {
 661         return getType() == WINDOW;
 662     }
 663 }
--- EOF ---