Example usage for javax.imageio ImageWriteParam setSourceBands

Introduction

In this page you can find the example usage for javax.imageio ImageWriteParam setSourceBands.

Prototype

public void setSourceBands(int[] sourceBands) 

Source Link

Document

Sets the indices of the source bands to be used.

Usage

From source file:org.apache.flex.compiler.internal.embedding.transcoders.JPEGTranscoder.java

private byte[] bufferedImageToJPEG(ImageInfo imageInfo, int[] pixels) throws Exception {
    BufferedImage bufferedImage = new BufferedImage(imageInfo.width, imageInfo.height,
            BufferedImage.TYPE_INT_ARGB);
    bufferedImage.setRGB(0, 0, imageInfo.width, imageInfo.height, pixels, 0, imageInfo.width);

    ImageWriter writer = ImageIO.getImageWritersByFormatName("jpeg").next();
    ImageWriteParam writeParam = writer.getDefaultWriteParam();
    ColorModel colorModel = new DirectColorModel(24, 0x00ff0000, 0x0000ff00, 0x000000ff);
    ImageTypeSpecifier imageTypeSpecifier = new ImageTypeSpecifier(colorModel,
            colorModel.createCompatibleSampleModel(1, 1));
    writeParam.setDestinationType(imageTypeSpecifier);
    writeParam.setSourceBands(new int[] { 0, 1, 2 });
    writeParam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);

    float q = 1.0f;
    if (quality != null)
        q = quality.floatValue();//from   ww  w.j ava 2s  . com
    writeParam.setCompressionQuality(q);

    DAByteArrayOutputStream buffer = new DAByteArrayOutputStream();
    writer.setOutput(new MemoryCacheImageOutputStream(buffer));

    IIOImage ioImage = new IIOImage(bufferedImage, null, null);

    writer.write(null, ioImage, writeParam);
    writer.dispose();

    return buffer.getDirectByteArray();
}

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From source file:org.polymap.core.data.image.ImageEncodeProcessor.java

private void imageioEncodeJPEG(Image image, ChunkedResponseOutputStream out) throws IOException {
    // this code is from http://forums.sun.com/thread.jspa?threadID=5197061
    ImageWriter writer = ImageIO.getImageWritersByFormatName("jpeg").next();
    ImageWriteParam param = writer.getDefaultWriteParam();
    param.setSourceBands(new int[] { 0, 1, 2 });
    ColorModel cm = new DirectColorModel(24, 0x00ff0000, // Red
            0x0000ff00, // Green
            0x000000ff, // Blue
            0x0); // Alpha
    param.setDestinationType(new ImageTypeSpecifier(cm, cm.createCompatibleSampleModel(1, 1)));

    ImageOutputStream imageOut = ImageIO.createImageOutputStream(out);
    writer.setOutput(imageOut);/*w  w w.  j  a  v  a 2  s .  c  o  m*/
    writer.write(null, new IIOImage((RenderedImage) image, null, null), param);
    writer.dispose();
    imageOut.close();
}

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