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 }