Java 类javax.imageio.plugins.jpeg.JPEGImageWriteParam 实例源码

项目：chordatlas 文件：Imagez.java

public static void writeJPG( BufferedImage rendered, float quality, File f ) {

        try {
            JPEGImageWriteParam jpegParams = new JPEGImageWriteParam( null );
            jpegParams.setCompressionMode( ImageWriteParam.MODE_EXPLICIT );
            jpegParams.setCompressionQuality( 1f );

            ImageWriter writer = ImageIO.getImageWritersByFormatName( "jpeg" ).next();
            ImageWriteParam param = writer.getDefaultWriteParam();
            param.setCompressionMode( ImageWriteParam.MODE_EXPLICIT ); // Needed see javadoc
            param.setCompressionQuality( quality ); // Highest quality
            writer.setOutput( new FileImageOutputStream( f ) );
            writer.write( null, new IIOImage( rendered, null, null ), jpegParams );
        } catch ( Throwable th ) {
            th.printStackTrace();
        }
    }

项目：game-of-life 文件：BoardImageGenerator.java

/**
 * Save a JPEG image to file
 *
 * @param img the image to be saved
 * @param fileName file name to use
 * @throws IOException
 */
private void store(BufferedImage img, String fileName) throws IOException {
    File file = File.createTempFile(fileName, JPEG_EXTENSION);
    fileName += JPEG_EXTENSION;
    file.deleteOnExit();

    ImageWriter writer = null;
    Iterator<ImageWriter> iter = ImageIO.getImageWritersByFormatName(JPEG);
    if (iter.hasNext()) {
        writer = iter.next();
    }

    ImageOutputStream ios = ImageIO.createImageOutputStream(file);
    writer.setOutput(ios);
    ImageWriteParam param = new JPEGImageWriteParam(java.util.Locale.getDefault());
    param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
    param.setCompressionQuality(0.98f);
    writer.write(null, new IIOImage(img, null, null), param);

    // Save the image to S3 and DynamoDB
    awsHelper.saveImageToAWS(fileName, file, sessionId, index);
}

项目：mid 文件：Requester.java

public static void downloadImage(String imgURL, InputStream postInStr) 
        throws IOException {
    BufferedImage image = ImageIO.read(postInStr);

    String[] URLparts = imgURL.split("/");
    File outputFile = new File(saveFolderName + "/" + URLparts[URLparts.length - 1]);

    JPEGImageWriteParam jpegParams = new JPEGImageWriteParam(null);
    jpegParams.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
    jpegParams.setCompressionQuality(1f);

    final ImageWriter writer = ImageIO.getImageWritersByFormatName("jpg").next();
    writer.setOutput(new FileImageOutputStream(outputFile));
    writer.write(null, new IIOImage(image, null, null), jpegParams);

    System.out.println("Got " + outputFile + " from " + imgURL);
}

项目：Push2Display 文件：ImageIOJPEGImageWriter.java

/** {@inheritDoc} */
@Override
protected ImageWriteParam getDefaultWriteParam(
        ImageWriter iiowriter, RenderedImage image,
        ImageWriterParams params) {
    JPEGImageWriteParam param = new JPEGImageWriteParam(iiowriter.getLocale());
    param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
    param.setCompressionQuality(params.getJPEGQuality());
    if (params.getCompressionMethod() != null
            && !"JPEG".equals(params.getCompressionMethod())) {
        throw new IllegalArgumentException(
                "No compression method other than JPEG is supported for JPEG output!");
    }
    if (params.getJPEGForceBaseline()) {
        param.setProgressiveMode(JPEGImageWriteParam.MODE_DISABLED);
    }
    return param;
}

项目：openstego 文件：ImageUtil.java

private static void writeJpegImage(ImageHolder image, OutputStream os) throws OpenStegoException {
    try {
        JPEGImageWriteParam jpegParams = new JPEGImageWriteParam(null);
        jpegParams.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
        Float qual = UserPreferences.getFloat("image.writer.jpeg.quality");
        if (qual == null) {
            qual = 0.75f;
        }
        jpegParams.setCompressionQuality(qual);

        ImageWriter writer = ImageIO.getImageWritersByFormatName("jpg").next();
        writer.setOutput(ImageIO.createImageOutputStream(os));
        writer.write(null, new IIOImage(image.getImage(), null, image.getMetadata()), jpegParams);
    } catch (IOException e) {
        throw new OpenStegoException(e);
    }
}

项目：Push2Display 文件：ImageIOJPEGImageWriter.java

/** {@inheritDoc} */
@Override
protected ImageWriteParam getDefaultWriteParam(
        ImageWriter iiowriter, RenderedImage image,
        ImageWriterParams params) {
    JPEGImageWriteParam param = new JPEGImageWriteParam(iiowriter.getLocale());
    param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
    param.setCompressionQuality(params.getJPEGQuality());
    if (params.getCompressionMethod() != null
            && !"JPEG".equals(params.getCompressionMethod())) {
        throw new IllegalArgumentException(
                "No compression method other than JPEG is supported for JPEG output!");
    }
    if (params.getJPEGForceBaseline()) {
        param.setProgressiveMode(JPEGImageWriteParam.MODE_DISABLED);
    }
    return param;
}

项目：Lucee 文件：Image.java

private static ImageWriteParam getImageWriteParam(BufferedImage im, ImageWriter writer, float quality, String srcFormat, String trgFormat) {
    ImageWriteParam iwp;
    if("jpg".equalsIgnoreCase(srcFormat)) {
        ColorModel cm = im.getColorModel();
        if(cm.hasAlpha())im=jpgImage(im);
        JPEGImageWriteParam jiwp = new JPEGImageWriteParam(Locale.getDefault());
        jiwp.setOptimizeHuffmanTables(true);
        iwp = jiwp;
    }
    else
        iwp = writer.getDefaultWriteParam();

    setCompressionModeEL(iwp,ImageWriteParam.MODE_EXPLICIT);
    setCompressionQualityEL(iwp,quality);

    return iwp;
}

项目：feathers-sdk 文件：ImageIOJPEGImageWriter.java

/**
 * @see ImageIOImageWriter#getDefaultWriteParam(javax.imageio.ImageWriter, java.awt.image.RenderedImage, ImageWriterParams)
 */
protected ImageWriteParam getDefaultWriteParam(
        ImageWriter iiowriter, RenderedImage image,
        ImageWriterParams params) {
    JPEGImageWriteParam param = new JPEGImageWriteParam(iiowriter.getLocale());
    //ImageTypeSpecifier type = ImageTypeSpecifier.createFromRenderedImage(image);
    /*
    ImageTypeSpecifier type = new ImageTypeSpecifier(
            image.getColorModel(), image.getSampleModel());
            */
    /* didn't work as expected...
    ImageTypeSpecifier type = ImageTypeSpecifier.createFromBufferedImageType(
            BufferedImage.TYPE_INT_RGB);
    param.setDestinationType(type);
    param.setSourceBands(new int[] {0, 1, 2});
    */
    return param;
}

项目：cats 文件：ImageFunctions.java

public static void writeHighQualityJpeg( BufferedImage img, File f ) throws IOException
{
    // Find a jpeg writer
    ImageWriter writer = null;
    Iterator iter = ImageIO.getImageWritersByFormatName( "jpg" );
    if ( iter.hasNext() )
    {
        writer = ( ImageWriter ) iter.next();
    }
    // Prepare output file
    ImageOutputStream ios = ImageIO.createImageOutputStream( f );
    writer.setOutput( ios );

    ImageWriteParam iwparam = new JPEGImageWriteParam( Locale.getDefault() );
    iwparam.setCompressionMode( ImageWriteParam.MODE_EXPLICIT );
    // according to compression quality is between 0 and 1 (lowest to
    // highest quality)
    iwparam.setCompressionQuality( 1 );

    writer.write( null, new IIOImage( img, null, null ), iwparam );

    // Cleanup
    ios.flush();
    writer.dispose();
    ios.close();
}

项目：ZawodyWeb 文件：PdfToImage.java

public static byte[] convertPdf(byte[] pdf) {
    try {
        ByteArrayInputStream bais = new ByteArrayInputStream(pdf);
        BufferedImage bi = process(bais);

        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ImageWriter converter = ImageIO.getImageWritersByMIMEType("image/jpeg").next();

        IIOImage image = new IIOImage(bi, null, null);
        ImageOutputStream output = ImageIO.createImageOutputStream(baos);
        converter.setOutput(output);

        ImageWriteParam jpegParams = converter.getDefaultWriteParam();
        jpegParams.setCompressionMode(JPEGImageWriteParam.MODE_EXPLICIT);
        jpegParams.setCompressionQuality(0.3f);

        converter.write(null, image, jpegParams);
        converter.dispose();

        return baos.toByteArray();
    } catch (Exception ex) {
        throw new RuntimeException("Exception in converting pdf", ex);
    }
}

项目：matos-tool 文件：StatisticTool.java

private static void saveToFile(BufferedImage img, File file) throws IOException {
    ImageWriter writer = null;
    Iterator<ImageWriter> iter = ImageIO.getImageWritersByFormatName("jpg");
    if (!iter.hasNext())
        return;
    writer = (ImageWriter) iter.next();

    ImageOutputStream ios = ImageIO.createImageOutputStream(file);
    if (ios == null) throw new IOException("cannot create stream for image to " + file);
    try {
        writer.setOutput(ios);
        ImageWriteParam param = new JPEGImageWriteParam(Locale.getDefault());
        param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
        param.setCompressionQuality(JPEG_QUALITY);
        writer.write(null, new IIOImage(img, null, null), param);
    } finally {
        writer.dispose();
        ios.close();
    }
}