Java VolatileImage.getGraphics方法代码示例

import java.awt.image.VolatileImage; //导入方法依赖的package包/类
public static void main(final String[] args) {

        final BufferedImage bi = createBufferedImage();
        final VolatileImage vi = createVolatileImage();
        final Graphics s2dVi = vi.getGraphics();

        //sw->texture->surface blit
        s2dVi.drawImage(bi, 0, 0, null);

        final BufferedImage results = vi.getSnapshot();
        for (int i = 0; i < SIZE; ++i) {
            for (int j = 0; j < SIZE; ++j) {
                //Image should be opaque: (black color and alpha = 255)
                if (results.getRGB(i, j) != 0xFF000000) {
                    throw new RuntimeException("Failed: Wrong alpha");
                }
            }
        }
        System.out.println("Passed");
    }
 

import java.awt.image.VolatileImage; //导入方法依赖的package包/类
private static void testGC(GraphicsConfiguration gc) {
    if (!(gc instanceof AccelGraphicsConfig)) {
        System.out.println("Test passed: no hw accelerated configs found.");
        return;
    }
    System.out.println("AccelGraphicsConfig exists, testing.");
    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());
        }
    } else {
        System.out.println("VI is not DestSurfaceProvider");
    }
    testVICreation(agc, CAPS_RT_TEXTURE_ALPHA, TRANSLUCENT, RT_TEXTURE);
    testVICreation(agc, CAPS_RT_TEXTURE_OPAQUE, OPAQUE, RT_TEXTURE);
    testVICreation(agc, CAPS_RT_PLAIN_ALPHA, TRANSLUCENT, RT_PLAIN);
    testVICreation(agc, agc.getContextCapabilities().getCaps(), OPAQUE,
                   TEXTURE);
    testForNPEDuringCreation(agc);
}
 

import java.awt.image.VolatileImage; //导入方法依赖的package包/类
public static void main(String[] args) {
    GraphicsConfiguration gc =
        GraphicsEnvironment.getLocalGraphicsEnvironment().
            getDefaultScreenDevice().getDefaultConfiguration();

    if (gc.getColorModel().getPixelSize() <= 8) {
        System.out.println("8-bit color model, test considered passed");
        return;
    }

    /*
     * Set up images:
     * 1.) VolatileImge for rendering to,
     * 2.) BufferedImage for reading back the contents of the VI
     * 3.) The image triggering the problem
     */
    VolatileImage vImg = null;
    BufferedImage readBackBImg;

    // create a BITMASK ICM such that the transparent color is
    // tr. black (and it's the first in the color map so a buffered image
    // created with this ICM is transparent
    byte r[] = { 0x00, (byte)0xff};
    byte g[] = { 0x00, (byte)0xff};
    byte b[] = { 0x00, (byte)0xff};
    IndexColorModel icm = new IndexColorModel(8, 2, r, g, b, 0);
    WritableRaster wr = icm.createCompatibleWritableRaster(25, 25);
    BufferedImage tImg = new BufferedImage(icm, wr, false, null);

    do {
        if (vImg == null ||
            vImg.validate(gc) == VolatileImage.IMAGE_INCOMPATIBLE)
        {
            vImg = gc.createCompatibleVolatileImage(tImg.getWidth(),
                                                    tImg.getHeight());
        }

        Graphics viG = vImg.getGraphics();
        viG.setColor(Color.red);
        viG.fillRect(0, 0, vImg.getWidth(), vImg.getHeight());

        viG.drawImage(tImg, 0, 0, Color.green, null);
        viG.fillRect(0, 0, vImg.getWidth(), vImg.getHeight());
        viG.drawImage(tImg, 0, 0, Color.white, null);

        readBackBImg = vImg.getSnapshot();
    } while (vImg.contentsLost());

    for (int x = 0; x < readBackBImg.getWidth(); x++) {
        for (int y = 0; y < readBackBImg.getHeight(); y++) {
            int currPixel = readBackBImg.getRGB(x, y);
            if (currPixel != Color.white.getRGB()) {
                String fileName = "DrawImageBgTest.png";
                try {
                    ImageIO.write(readBackBImg, "png", new File(fileName));
                    System.err.println("Dumped image to " + fileName);
                } catch (IOException ex) {}
                throw new
                    RuntimeException("Test Failed: found wrong color: 0x"+
                                     Integer.toHexString(currPixel));
            }
        }
    }
    System.out.println("Test Passed.");
}
 

import java.awt.image.VolatileImage; //导入方法依赖的package包/类
private static void testVICreation(AccelGraphicsConfig agc, int cap,
                                   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) {
                        throw new RuntimeException("Failed: " +
                            "texture.getGraphics() didn't throw exception");
                    } else {
                        System.out.println("Passed: VI.getGraphics()" +
                                " threw exception for texture-based VI");
                    }
                }
            } else {
                System.out.printf("Passed: VI of type %d was " +
                        "created for cap=%d but accel surface is null\n",
                        type, cap);
            }
        }
    } else {
        if (vi != null) {
            throw new RuntimeException("Failed: created VI for " +
                                       "unsupported cap=" + cap);
        }
    }
}