Java ImageWriter.getDefaultImageMetadata方法代码示例

import javax.imageio.ImageWriter; //导入方法依赖的package包/类
/**
 * Create the gif and clear down afterwards.
 * 
 * @return the gif byte data
 * @throws IOException if the output fails
 */
public byte[] createGif() throws IOException {
	try {
		ImageOutputStream ios = ImageIO.createImageOutputStream(baos); // N.b. not try with closure because we need to close the stream before returning
		ImageWriter iw = ImageIO.getImageWritersByFormatName("gif").next();	
		iw.setOutput(ios);
		iw.prepareWriteSequence(null);
		int index = 0;
		ImageWriteParam iwp = iw.getDefaultWriteParam();
		String frameDelay = String.valueOf(OptionsObject.getInstance().getGifDisplayTimeMillis() / 10L);
		log.debug("Frames size: {}, Free memory {}", frames.size(), Runtime.getRuntime().freeMemory());
		for (BufferedImage frame : frames) {
			IIOMetadata metadata = iw.getDefaultImageMetadata(new ImageTypeSpecifier(frame), iwp);
			configureMetaData(metadata, frameDelay, index++);
			iw.writeToSequence(new IIOImage(frame, null, metadata), null);
		}
		iw.endWriteSequence();
		ios.close();
		return baos.toByteArray();
	} finally {
		baos = null;
		frames = null;
	}
}
 

import javax.imageio.ImageWriter; //导入方法依赖的package包/类
public static void main(String[] args) throws Exception {
    String format = "javax_imageio_1.0";
    BufferedImage img =
        new BufferedImage(16, 16, BufferedImage.TYPE_INT_RGB);
    ImageWriter iw = ImageIO.getImageWritersByMIMEType("image/png").next();
    IIOMetadata meta =
        iw.getDefaultImageMetadata(new ImageTypeSpecifier(img), null);
    DOMImplementationRegistry registry;
    registry = DOMImplementationRegistry.newInstance();
    DOMImplementation impl = registry.getDOMImplementation("XML 3.0");
    Document doc = impl.createDocument(null, format, null);
    Element root, text, entry;
    root = doc.getDocumentElement();
    root.appendChild(text = doc.createElement("Text"));
    text.appendChild(entry = doc.createElement("TextEntry"));
    // keyword isn't #REQUIRED by the standard metadata format.
    // However, it is required by the PNG format, so we include it here.
    entry.setAttribute("keyword", "Comment");
    entry.setAttribute("value", "Some demo comment");
    meta.mergeTree(format, root);
}
 

import javax.imageio.ImageWriter; //导入方法依赖的package包/类
protected File writeImageWithHist(BufferedImage bi) throws IOException {
    File f = File.createTempFile("hist_", ".png", new File("."));

    ImageWriter writer = ImageIO.getImageWritersByFormatName("PNG").next();

    ImageOutputStream ios = ImageIO.createImageOutputStream(f);
    writer.setOutput(ios);

    ImageWriteParam param = writer.getDefaultWriteParam();
    ImageTypeSpecifier type = new ImageTypeSpecifier(bi);

    IIOMetadata imgMetadata = writer.getDefaultImageMetadata(type, param);

    /* add hIST node to image metadata */
    imgMetadata = upgradeMetadata(imgMetadata, bi);

    IIOImage iio_img = new IIOImage(bi,
                                    null, // no thumbnails
                                    imgMetadata);

    writer.write(iio_img);
    ios.flush();
    ios.close();
    return f;
}
 

import javax.imageio.ImageWriter; //导入方法依赖的package包/类
public static void main(String[] args) {
    ImageWriter w = ImageIO.getImageWritersByFormatName(format).next();
    if (w == null) {
        throw new RuntimeException("No available writers for format " + format);
    }
    ImageWriteParam p = w.getDefaultWriteParam();

    ImageTypeSpecifier t =
            ImageTypeSpecifier.createFromBufferedImageType(BufferedImage.TYPE_INT_RGB);

    IIOMetadata m = w.getDefaultImageMetadata(t, p);
    System.out.println("Default image metadata is " + m);
    testWritableMetadata(m);

    IIOMetadata sm = w.getDefaultStreamMetadata(p);
    System.out.println("Default stream metadata is " + sm);
    testWritableMetadata(sm);
}
 

import javax.imageio.ImageWriter; //导入方法依赖的package包/类
private static void doTest(int mode) {
    String fileFormat = "bmp";
    try {
        ImageWriter iw = (ImageWriter)ImageIO.getImageWritersBySuffix(fileFormat).next();
        if(iw == null) {
            throw new RuntimeException("No available image writer for "
                                       + fileFormat
                                       + " Test failed.");
        }

        File file = new File("image." + fileFormat);
        ImageOutputStream ios = ImageIO.createImageOutputStream(file);
        iw.setOutput(ios);

        BufferedImage bimg = new BufferedImage(100,
                                               100, BufferedImage.TYPE_INT_RGB);
        Graphics g = bimg.getGraphics();
        g.setColor(Color.green);
        g.fillRect(0,0,100,100);

        ImageWriteParam param = iw.getDefaultWriteParam();

        param.setCompressionMode(mode);

        IIOMetadata meta = iw.getDefaultImageMetadata(new ImageTypeSpecifier(bimg),
                                                      param);

        IIOImage iioImg = new IIOImage(bimg, null, meta);
        iw.write(null, iioImg, param);
    } catch(Exception e) {
        e.printStackTrace();
        throw new RuntimeException("Test failed.");
    }
}
 

import javax.imageio.ImageWriter; //导入方法依赖的package包/类
public static void main(String[] args) throws IIOInvalidTreeException {

        // getting the writer for the png format
        Iterator iter = ImageIO.getImageWritersByFormatName("png");
        ImageWriter writer = (ImageWriter) iter.next();

        // creating a color model
        ColorModel colorModel = ColorModel.getRGBdefault();

        // creating a sample model
        SampleModel sampleModel = colorModel.createCompatibleSampleModel(640, 480);

        // creating a default metadata object
        IIOMetadata metaData = writer.getDefaultImageMetadata(new ImageTypeSpecifier(colorModel, sampleModel), null);
        String formatName = metaData.getNativeMetadataFormatName();

        // first call
        Node metaDataNode = metaData.getAsTree(formatName);
        try {
            metaData.setFromTree(formatName, metaDataNode);
        } catch (Exception ex) {
            ex.printStackTrace();
        }

        // second call (bitdepht is already set to an invalid value)
        metaDataNode = metaData.getAsTree(formatName);

        metaData.setFromTree(formatName, metaDataNode);

    }
 

import javax.imageio.ImageWriter; //导入方法依赖的package包/类
private static void writeTo(File f, ITXtTest t) {
    BufferedImage src = createBufferedImage();
    try {
        ImageOutputStream imageOutputStream =
            ImageIO.createImageOutputStream(f);

        ImageTypeSpecifier imageTypeSpecifier =
            new ImageTypeSpecifier(src);
        ImageWriter imageWriter =
            ImageIO.getImageWritersByFormatName("PNG").next();

        imageWriter.setOutput(imageOutputStream);

        IIOMetadata m =
            imageWriter.getDefaultImageMetadata(imageTypeSpecifier, null);

        String format = m.getNativeMetadataFormatName();
        Node root = m.getAsTree(format);

        IIOMetadataNode iTXt = t.getNode();
        root.appendChild(iTXt);
        m.setFromTree(format, root);

        imageWriter.write(new IIOImage(src, null, m));
        imageOutputStream.close();
        System.out.println("Writing done.");
    } catch (Throwable e) {
        throw new RuntimeException("Writing test failed.", e);
    }
}
 

import javax.imageio.ImageWriter; //导入方法依赖的package包/类
public static void main(String[] args) throws IOException {
    ImageWriter iw =
        (ImageWriter)ImageIO.getImageWritersByFormatName("jpeg").next();

    ImageTypeSpecifier type =
        ImageTypeSpecifier.createFromBufferedImageType(BufferedImage.TYPE_INT_RGB);

    ImageOutputStream ios =
        ImageIO.createImageOutputStream(new File("MergeTreeTest.jpeg"));
    iw.setOutput(ios);

    IIOMetadata meta = iw.getDefaultImageMetadata(type, null);

    boolean isFailed = false;

    String[] fmts = meta.getMetadataFormatNames();
    for (int i=0; i<fmts.length; i++) {
        System.out.print("Format: " + fmts[i] + " ... ");
        Node root = meta.getAsTree(fmts[i]);
        try {
            meta.mergeTree(fmts[i], root);
        } catch (NullPointerException e) {
            throw new RuntimeException("Test failed for format " + fmts[i], e);
        }
        System.out.println("PASSED");
    }
}
 

import javax.imageio.ImageWriter; //导入方法依赖的package包/类
protected void doTest() throws IOException {
    BufferedImage biSrc = getSrc();

    ImageWriter writer = ImageIO.getImageWritersByFormatName("GIF").next();
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    ImageOutputStream ios = ImageIO.createImageOutputStream(baos);
    writer.setOutput(ios);

    ImageWriteParam writeParam = writer.getDefaultWriteParam();
    IIOMetadata imageMetadata =
        writer.getDefaultImageMetadata(new ImageTypeSpecifier(biSrc), writeParam);

    IIOMetadata streamMetadata = writer.getDefaultStreamMetadata(writeParam);

    IIOImage iioImg = new IIOImage(biSrc, null, imageMetadata);
    writer.write(streamMetadata, iioImg, writeParam);
    ios.close();

    ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
    ImageInputStream iis = ImageIO.createImageInputStream(bais);
    ImageReader reader = ImageIO.getImageReader(writer);
    reader.setInput(iis);
    BufferedImage dst = reader.read(0);

    // do test
    int x = dx / 2;
    int y = height / 2;

    for (int i = 0; i < usedColors.length; i++) {
        int dstRgb = dst.getRGB(x, y);
        System.out.println("dstColor: " + Integer.toHexString(dstRgb));
        int srcRgb = usedColors[i].getRGB();
        System.out.println("srcColor: " + Integer.toHexString(srcRgb));
        if (dstRgb != srcRgb) {
            throw new RuntimeException("wrong color " + i + ": " + Integer.toHexString(dstRgb));
        }
        x += dx;
    }

}
 

import javax.imageio.ImageWriter; //导入方法依赖的package包/类
public static void main(String[] args) {
    try {
        AnimationTest t = new AnimationTest();
        t.initFrame();

        ImageWriter w = t.initWriter();

        ImageWriteParam p = w.getDefaultWriteParam();

        IIOMetadata streamMetadata = w.getDefaultStreamMetadata(p);

        w.prepareWriteSequence(streamMetadata);

        for (int i = 0; i < 50; i++) {
            BufferedImage f = t.createNextFrame();

            ImageTypeSpecifier type = new ImageTypeSpecifier(f);

            IIOMetadata m = w.getDefaultImageMetadata(type, p);

            w.writeToSequence(new IIOImage(f, null, m), p);
        }
        w.endWriteSequence();

        t.checkAnimation();
    } catch (Exception e) {
        throw new RuntimeException("Test failed.", e);
    }
}
 

import javax.imageio.ImageWriter; //导入方法依赖的package包/类
private static void writeTo(File f, ITXtTest t) {
    BufferedImage src = createBufferedImage();
    try (ImageOutputStream imageOutputStream =
            ImageIO.createImageOutputStream(f)) {

        ImageTypeSpecifier imageTypeSpecifier =
            new ImageTypeSpecifier(src);
        ImageWriter imageWriter =
            ImageIO.getImageWritersByFormatName("PNG").next();

        imageWriter.setOutput(imageOutputStream);

        IIOMetadata m =
            imageWriter.getDefaultImageMetadata(imageTypeSpecifier, null);

        String format = m.getNativeMetadataFormatName();
        Node root = m.getAsTree(format);

        IIOMetadataNode iTXt = t.getNode();
        root.appendChild(iTXt);
        m.setFromTree(format, root);

        imageWriter.write(new IIOImage(src, null, m));
        System.out.println("Writing done.");
    } catch (Throwable e) {
        throw new RuntimeException("Writing test failed.", e);
    }
}
 

import javax.imageio.ImageWriter; //导入方法依赖的package包/类
public static void test(String mimeType, boolean useStreamMeta,
                        String metaXml, String... boolXpaths)
    throws Exception
{
    BufferedImage img =
        new BufferedImage(16, 16, BufferedImage.TYPE_INT_RGB);
    ImageWriter iw = ImageIO.getImageWritersByMIMEType(mimeType).next();
    ByteArrayOutputStream os = new ByteArrayOutputStream();
    ImageOutputStream ios = new MemoryCacheImageOutputStream(os);
    iw.setOutput(ios);
    ImageWriteParam param = null;
    IIOMetadata streamMeta = iw.getDefaultStreamMetadata(param);
    IIOMetadata imageMeta =
        iw.getDefaultImageMetadata(new ImageTypeSpecifier(img), param);
    IIOMetadata meta = useStreamMeta ? streamMeta : imageMeta;
    Source src = new StreamSource(new StringReader(metaXml));
    DOMResult dst = new DOMResult();
    transform(src, dst);
    Document doc = (Document)dst.getNode();
    Element node = doc.getDocumentElement();
    String metaFormat = node.getNodeName();

    // Verify that the default metadata gets formatted correctly.
    verify(meta.getAsTree(metaFormat), boolXpaths, false);

    meta.mergeTree(metaFormat, node);

    // Verify that the merged metadata gets formatte correctly.
    verify(meta.getAsTree(metaFormat), boolXpaths, true);

    iw.write(streamMeta, new IIOImage(img, null, imageMeta), param);
    iw.dispose();
    ios.close();
    ImageReader ir = ImageIO.getImageReader(iw);
    byte[] bytes = os.toByteArray();
    if (bytes.length == 0)
        throw new AssertionError("Zero length image file");
    ByteArrayInputStream is = new ByteArrayInputStream(bytes);
    ImageInputStream iis = new MemoryCacheImageInputStream(is);
    ir.setInput(iis);
    if (useStreamMeta) meta = ir.getStreamMetadata();
    else meta = ir.getImageMetadata(0);

    // Verify again after writing and re-reading the image
    verify(meta.getAsTree(metaFormat), boolXpaths, true);
}
 

import javax.imageio.ImageWriter; //导入方法依赖的package包/类
public static void main(String[] args) throws IOException {
    String format = "GIF";
    ImageWriter writer =
            ImageIO.getImageWritersByFormatName(format).next();
    if (writer == null) {
        throw new RuntimeException("No available writers for " + format);
    }

    BufferedImage img = createTestImage(100, 100, BufferedImage.TYPE_BYTE_GRAY);

    ImageWriteParam p = writer.getDefaultWriteParam();
    ImageTypeSpecifier type =
        ImageTypeSpecifier.createFromRenderedImage(img);
    IIOMetadata inImageMetadata =
        writer.getDefaultImageMetadata(type, p);

    IIOMetadata inStreamMetadata = writer.getDefaultStreamMetadata(p);

    // write and read image
    ByteArrayOutputStream baos = new ByteArrayOutputStream();

    ImageOutputStream ios = ImageIO.createImageOutputStream(baos);
    writer.setOutput(ios);

    writer.write(inStreamMetadata, new IIOImage(img, null, inImageMetadata), p);

    ios.flush();
    ios.close();

    // read result
    ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
    ImageInputStream iis = ImageIO.createImageInputStream(bais);
    ImageReader reader = ImageIO.getImageReader(writer);
    reader.setInput(iis);

    IIOMetadata outStreamMetadata = reader.getStreamMetadata();

    GIFStreamMetadata gifStreamMetadata = (GIFStreamMetadata)outStreamMetadata;

    if (gifStreamMetadata.logicalScreenWidth != img.getWidth() ||
            gifStreamMetadata.logicalScreenHeight != img.getHeight()) {
        throw new RuntimeException("Test failed due to wrong logical screen dimension.");
    }
}
 

import javax.imageio.ImageWriter; //导入方法依赖的package包/类
public WbmpDefaultImageMetadataTest(String format) {
    try {
        bimg = new BufferedImage(200, 200, bimg.TYPE_INT_RGB);
        Graphics gg = bimg.getGraphics();
        gg.setColor(Color.red);
        gg.fillRect(50, 50, 100, 100);

        Iterator it = ImageIO.getImageWritersByFormatName(format);
        if (it.hasNext()) {
            writer = (ImageWriter) it.next();
        }
        if (writer == null) {
            throw new RuntimeException("No writer available for the given format."
                                       + " Test failed.");
        }
        writeParam = writer.getDefaultWriteParam();

        System.out.println("Testing Image Metadata for "+format+"\n");
        imageData = writer.getDefaultImageMetadata(new ImageTypeSpecifier(bimg), writeParam);
        if (imageData == null) {
            System.out.println("return value is null. No default image metadata is associated with "+format+" writer");
            throw new RuntimeException("Default image metadata is null."
                                       + " Test failed.");
        }
        int j = 0;
        String imageDataNames[] = null;
        if(imageData != null) {
            System.out.println("Is standard metadata format supported (Image) ? "+
                               imageData.isStandardMetadataFormatSupported() );
            imageDataNames = imageData.getMetadataFormatNames();
            System.out.println("\nAll supported Metadata Format Names\n");
            if(imageDataNames!=null){
                for(j=0; j<imageDataNames.length; j++)  {
                    System.out.println("FORMAT NAME: "+imageDataNames[j]);
                    if (imageDataNames[j].equals(imageData.getNativeMetadataFormatName())) {
                        System.out.println("This is a Native Metadata format\n");
                    } else {
                        System.out.println("\n");
                    }
                    System.out.println("");
                    System.out.println("IIOImageMetadata DOM tree for "+imageDataNames[j]);
                    System.out.println("");
                    Node imageNode = imageData.getAsTree(imageDataNames[j]);
                    displayMetadata(imageNode);
                    System.out.println("\n\n");
                }
            }
        }
    }catch(Exception e){
        e.printStackTrace();
        throw new RuntimeException("Exception was thrown."
                                   + " Test failed.");
    }
}
 

import javax.imageio.ImageWriter; //导入方法依赖的package包/类
public BmpDefaultImageMetadataTest(String format) {
    try {
        bimg = new BufferedImage(200, 200, bimg.TYPE_INT_RGB);
        Graphics gg = bimg.getGraphics();
        gg.setColor(Color.red);
        gg.fillRect(50, 50, 100, 100);

        Iterator it = ImageIO.getImageWritersByFormatName(format);
        if (it.hasNext()) {
            writer = (ImageWriter) it.next();
        }
        if (writer == null) {
            throw new RuntimeException("No writer available for the given format."
                                       + " Test failed.");
        }
        writeParam = writer.getDefaultWriteParam();

        System.out.println("Testing Image Metadata for "+format+"\n");
        imageData = writer.getDefaultImageMetadata(new ImageTypeSpecifier(bimg), writeParam);
        if (imageData == null) {
            System.out.println("return value is null. No default image metadata is associated with "+format+" writer");
            throw new RuntimeException("Default image metadata is null."
                                       + " Test failed.");
        }
        int j = 0;
        String imageDataNames[] = null;
        if(imageData != null) {
            System.out.println("Is standard metadata format supported (Image) ? "+
                               imageData.isStandardMetadataFormatSupported() );
            imageDataNames = imageData.getMetadataFormatNames();
            System.out.println("\nAll supported Metadata Format Names\n");
            if(imageDataNames!=null){
                for(j=0; j<imageDataNames.length; j++)  {
                    System.out.println("FORMAT NAME: "+imageDataNames[j]);
                    if (imageDataNames[j].equals(imageData.getNativeMetadataFormatName())) {
                        System.out.println("This is a Native Metadata format\n");
                    } else {
                        System.out.println("\n");
                    }
                    System.out.println("");
                    System.out.println("IIOImageMetadata DOM tree for "+imageDataNames[j]);
                    System.out.println("");
                    Node imageNode = imageData.getAsTree(imageDataNames[j]);
                    displayMetadata(imageNode);
                    System.out.println("\n\n");
                }
            }
        }
    }catch(Exception e){
        e.printStackTrace();
        throw new RuntimeException("Exception was thrown."
                                   + " Test failed.");
    }
}