Example usage for javax.imageio.plugins.jpeg JPEGImageWriteParam setOptimizeHuffmanTables

Introduction

In this page you can find the example usage for javax.imageio.plugins.jpeg JPEGImageWriteParam setOptimizeHuffmanTables.

Prototype

public void setOptimizeHuffmanTables(boolean optimize) 

Source Link

Document

Tells the writer to generate optimized Huffman tables for the image as part of the writing process.

Usage

From source file:lucee.runtime.img.Image.java

private void _writeOut(ImageOutputStream ios, String format, float quality, boolean noMeta)
        throws IOException, ExpressionException {
    if (quality < 0 || quality > 1)
        throw new IOException(
                "quality has an invalid value [" + quality + "], value has to be between 0 and 1");
    if (StringUtil.isEmpty(format))
        format = this.format;
    if (StringUtil.isEmpty(format))
        throw new IOException("missing format");

    BufferedImage im = image();// ww  w.  j  av a 2s.c o  m

    //IIOMetadata meta = noMeta?null:metadata(format);
    IIOMetadata meta = noMeta ? null : getMetaData(null);

    ImageWriter writer = null;
    ImageTypeSpecifier type = ImageTypeSpecifier.createFromRenderedImage(im);
    Iterator<ImageWriter> iter = ImageIO.getImageWriters(type, format);

    if (iter.hasNext()) {
        writer = iter.next();
    }
    if (writer == null)
        throw new IOException("no writer for format [" + format + "] available, available writer formats are ["
                + ListUtil.arrayToList(ImageUtil.getWriterFormatNames(), ",") + "]");

    ImageWriteParam iwp = null;
    if ("jpg".equalsIgnoreCase(format)) {
        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);
    writer.setOutput(ios);
    try {
        writer.write(meta, new IIOImage(im, null, meta), iwp);

    } finally {
        writer.dispose();
        ios.flush();
    }
}

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