Examples of java.awt.image.VolatileImage

java.awt.image.VolatileImage
e creation VolatileImage vImg = createVolatileImage(w, h); // rendering to the image void renderOffscreen() { do { if (vImg.validate(getGraphicsConfiguration()) == VolatileImage.IMAGE_INCOMPATIBLE) { // old vImg doesn't work with new GraphicsConfig; re-create it vImg = createVolatileImage(w, h); } Graphics2D g = vImg.createGraphics(); // // miscellaneous rendering commands... // g.dispose(); } while (vImg.contentsLost()); } // copying from the image (here, gScreen is the Graphics // object for the onscreen window) do { int returnCode = vImg.validate(getGraphicsConfiguration()); if (returnCode == VolatileImage.IMAGE_RESTORED) { // Contents need to be restored renderOffscreen(); // restore contents } else if (returnCode == VolatileImage.IMAGE_INCOMPATIBLE) { // old vImg doesn't work with new GraphicsConfig; re-create it vImg = createVolatileImage(w, h); renderOffscreen(); } gScreen.drawImage(vImg, 0, 0, this); } while (vImg.contentsLost());
Note that this class subclasses from the {@link Image} class, whichincludes methods that take an {@link ImageObserver} parameter forasynchronous notifications as information is received from a potential {@link ImageProducer}. Since this VolatileImage is not loaded from an asynchronous source, the various methods that take an ImageObserver parameter will behave as if the data has already been obtained from the ImageProducer. Specifically, this means that the return values from such methods will never indicate that the information is not yet available and the ImageObserver used in such methods will never need to be recorded for an asynchronous callback notification. @since 1.4

    }


    private static final String text =
        "The quick brown fox jumps over the lazy dog 1234567890";
    private static void renderText(Frame frame, Font f1) {
        VolatileImage vi = frame.createVolatileImage(256, 32);
        vi.validate(frame.getGraphicsConfiguration());


        Graphics2D g = vi.createGraphics();
        g.setFont(f1);
        g.drawString(text, 0, vi.getHeight()/2);
        g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,
                           RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
        g.drawString(text, 0, vi.getHeight()/2);
        g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,
                           RenderingHints.VALUE_TEXT_ANTIALIAS_LCD_HRGB);
        g.drawString(text, 0, vi.getHeight()/2);
        Toolkit.getDefaultToolkit().sync();
    }

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        bmImage = gc.createCompatibleImage(64, 64, Transparency.BITMASK);
        argbImage = gc.createCompatibleImage(64, 64, Transparency.TRANSLUCENT);


        if (gc.getColorModel().getPixelSize() > 8) {
            VolatileImage vi =
                gc.createCompatibleVolatileImage(64, 64, Transparency.OPAQUE);
            do {
                if (vi.validate(gc) == VolatileImage.IMAGE_INCOMPATIBLE) {
                    vi = gc.createCompatibleVolatileImage(64, 64,
                                                          Transparency.OPAQUE);
                    vi.validate(gc);
                }


                int color = testImage(vi, false, false);
                testResult("vi_noclip_notx", vi.getSnapshot(), color);


                color = testImage(vi, true, true);
                testResult("vi_clip_tx", vi.getSnapshot(), color);


                color = testImage(vi, true, false);
                testResult("vi_clip_notx", vi.getSnapshot(), color);


                color = testImage(vi, false, true);
                testResult("vi_noclip_tx", vi.getSnapshot(), color);
            } while (vi.contentsLost());
        }


        BufferedImage bi = new BufferedImage(64, 64, BufferedImage.TYPE_INT_RGB);
        int color = testImage(bi, false, false);
        testResult("bi_noclip_notx", bi, color);

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        if (gc.getColorModel().getPixelSize() < 16) {
            System.out.println("<16 bit depth detected, test passed");
            return;
        }


        VolatileImage vi =
            gc.createCompatibleVolatileImage(250, 4*120, Transparency.OPAQUE);
        BufferedImage res;
        do {
            vi.validate(gc);
            Graphics2D g2d = vi.createGraphics();
            g2d.setColor(Color.white);
            g2d.fillRect(0, 0, vi.getWidth(), vi.getHeight());


            render(g2d);


            res = vi.getSnapshot();
        } while (vi.contentsLost());


        for (int y = 0; y < bi.getHeight(); y++) {
            for (int x = 0; x < bi.getWidth(); x++) {
                if (res.getRGB(x, y) == Color.black.getRGB()) {
                    System.err.printf("Test FAILED: found black at %d,%d\n",

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        AccelGraphicsConfig agc = (AccelGraphicsConfig) gc;
        printAGC(agc);


        testContext(agc);


        VolatileImage vi = gc.createCompatibleVolatileImage(10, 10);
        vi.validate(gc);
        if (vi instanceof DestSurfaceProvider) {
            System.out.println("Passed: VI is DestSurfaceProvider");
            Surface s = ((DestSurfaceProvider) vi).getDestSurface();
            if (s instanceof AccelSurface) {
                System.out.println("Passed: Obtained Accel Surface");
                printSurface((AccelSurface) s);
            }
            Graphics g = vi.getGraphics();
            if (g instanceof DestSurfaceProvider) {
                System.out.println("Passed: VI graphics is " +
                                   "DestSurfaceProvider");
                printSurface(((DestSurfaceProvider) g).getDestSurface());
            }

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                                       int transparency, int type)
    {
        int caps = agc.getContextCapabilities().getCaps();
        int w = 11, h = 17;


        VolatileImage vi =
            agc.createCompatibleVolatileImage(w, h, transparency, type);
        if ((cap & caps) != 0) {
            if (vi == null) {
                System.out.printf("Failed: cap=%d is supported but " +
                                  "image wasn't created\n", cap);
                throw new RuntimeException("Failed: image wasn't created " +
                                           "for supported cap");
            } else {
                if (!(vi instanceof DestSurfaceProvider)) {
                    throw new RuntimeException("Failed: created VI is not " +
                                               "DestSurfaceProvider");
                }
                Surface s = ((DestSurfaceProvider) vi).getDestSurface();
                if (s instanceof AccelSurface) {
                    AccelSurface as = (AccelSurface) s;
                    printSurface(as);
                    if (as.getType() != type) {
                        throw new RuntimeException("Failed: returned VI is" +
                                " of incorrect type: " + as.getType() +
                                " requested type=" + type);
                    } else {
                        System.out.printf("Passed: VI of type %d was " +
                                "created for cap=%d\n", type, cap);
                    }
                    if (as.getType() == TEXTURE) {
                        boolean ex = false;
                        try {
                            Graphics g = vi.getGraphics();
                            g.dispose();
                        } catch (UnsupportedOperationException e) {
                            ex = true;
                        }
                        if (!ex) {

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                (int)(ram / (r.width * r.height * gc.getColorModel().getPixelSize()/8));
            iterations = Math.max(iterations, i);
            System.err.println("iterations="+iterations);
        }
        for (int i = 0; i < iterations; i++) {
            VolatileImage vi =
                agc.createCompatibleVolatileImage(r.width, r.height,
                                                  Transparency.OPAQUE,
                                                  AccelSurface.RT_PLAIN);
            if (vi == null) {
                break;
            }
            vis.add(vi);
        }
        for (VolatileImage vi : vis) {
            vi.flush();
        }
        vis = null;


        System.out.println("Passed: testing for possible NPEs " +
                           "during VI creation");

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     */
    public void replaceSurfaceData(int newNumBackBuffers,
                                   BufferCapabilities caps)
    {
        SurfaceData oldData = null;
        VolatileImage oldBB = null;
        synchronized(((Component)target).getTreeLock()) {
            synchronized(this) {
                if (pData == 0) {
                    return;
                }
                numBackBuffers = newNumBackBuffers;
                Win32GraphicsConfig gc =
                        (Win32GraphicsConfig)getGraphicsConfiguration();
                ScreenUpdateManager mgr = ScreenUpdateManager.getInstance();
                oldData = surfaceData;
                mgr.dropScreenSurface(oldData);
                surfaceData =
                    mgr.createScreenSurface(gc, this, numBackBuffers, true);
                if (oldData != null) {
                    oldData.invalidate();
                }


                oldBB = backBuffer;
                if (numBackBuffers > 0) {
                    // set the caps first, they're used when creating the bb
                    backBufferCaps = caps;
                    backBuffer = gc.createBackBuffer(this);
                } else if (backBuffer != null) {
                    backBufferCaps = null;
                    backBuffer = null;
                }
            }
        }
        // it would be better to do this before we create new ones,
        // but then we'd run into deadlock issues
        if (oldData != null) {
            oldData.flush();
            // null out the old data to make it collected faster
            oldData = null;
        }
        if (oldBB != null) {
            oldBB.flush();
            // null out the old data to make it collected faster
            oldData = null;
        }
    }

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    @Override
    public void flip(int x1, int y1, int x2, int y2,
                                  BufferCapabilities.FlipContents flipAction)
    {
        VolatileImage backBuffer = this.backBuffer;
        if (backBuffer == null) {
            throw new IllegalStateException("Buffers have not been created");
        }
        Win32GraphicsConfig gc =
            (Win32GraphicsConfig)getGraphicsConfiguration();

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public class XGraphics2DRTest extends TestCase {
    public void testNullClip() {
        try {
            GraphicsConfiguration gconf =
                    GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getDefaultConfiguration();
            VolatileImage vim = gconf.createCompatibleVolatileImage(10, 10);
            Graphics2D g2 = (Graphics2D) vim.getGraphics();
            g2.setClip(null);
        } catch(Exception e) {
            e.printStackTrace();
            fail("Cannot set null clip");
        }

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    }


    public void testCopyArea() {
        GraphicsConfiguration gconf =
                GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getDefaultConfiguration();
        VolatileImage vim = gconf.createCompatibleVolatileImage(20, 20);
        Graphics2D g2 = (Graphics2D) vim.getGraphics();
        g2.setColor(Color.WHITE);
        g2.fillRect(0,0,20,20);
        g2.setColor(Color.RED);
        g2.fillRect(2,2,1,1);
        g2.copyArea(2,2,1,1,2,4);
        int pix[] = vim.getSnapshot().getRaster().getPixel(4,6,(int [])null);
        assertEquals("copyArea failed for untranslated graphics", pix[0],255);
        assertEquals("copyArea failed for untranslated graphics", pix[1],0);
        assertEquals("copyArea failed for untranslated graphics", pix[2],0);
        g2.setTransform(AffineTransform.getTranslateInstance(2,2));
        g2.copyArea(0,0,1,1,4,8);
        pix = vim.getSnapshot().getRaster().getPixel(6,10,(int [])null);
        assertEquals("copyArea failed for translated graphics", pix[0],255);
        assertEquals("copyArea failed for translated graphics", pix[1],0);
        assertEquals("copyArea failed for translated graphics", pix[2],0);
    }

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