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    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.
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   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 = (String)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 = (String)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 = (String)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 = (String)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 <= sg2d.COMP_ISCOPY &&
  432                sg2d.paintState <= sg2d.PAINT_ALPHACOLOR)        ||
  433   
  434               /* CompositeType.SrcOver (any color) */
  435               (sg2d.compositeState == sg2d.COMP_ALPHA    &&
  436                sg2d.paintState <= sg2d.PAINT_ALPHACOLOR &&
  437                (((AlphaComposite)sg2d.composite).getRule() ==
  438                 AlphaComposite.SRC_OVER))                       ||
  439   
  440               /* CompositeType.Xor (any color) */
  441               (sg2d.compositeState == sg2d.COMP_XOR &&
  442                sg2d.paintState <= sg2d.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 <= sg2d.PAINT_ALPHACOLOR) {
  458                   if (sg2d.compositeState <= sg2d.COMP_XOR) {
  459                       txPipe = oglTxRenderPipe;
  460                       nonTxPipe = oglRenderPipe;
  461                   }
  462               } else if (sg2d.compositeState <= sg2d.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 <= sg2d.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 == sg2d.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 >= sg2d.TRANSFORM_TRANSLATESCALE) {
  498                   sg2d.drawpipe = txPipe;
  499                   sg2d.fillpipe = txPipe;
  500               } else if (sg2d.strokeState != sg2d.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 > sg2d.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 < sg2d.TRANSFORM_TRANSLATESCALE &&
  552               sg2d.compositeState < sg2d.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   }

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