Examples with IndexColorModel java.awt.image.IndexColorModel used on opensource projects

Example 56 with IndexColorModel

use of java.awt.image.IndexColorModel in project jdk8u_jdk by JetBrains.

the class ShortHistogramTest method gethISTNode.

private IIOMetadataNode gethISTNode(BufferedImage bi) {
    IndexColorModel icm = (IndexColorModel) bi.getColorModel();
    int mapSize = icm.getMapSize();
    int[] hist = new int[mapSize];
    Arrays.fill(hist, 0);
    Raster r = bi.getData();
    for (int y = 0; y < bi.getHeight(); y++) {
        for (int x = 0; x < bi.getWidth(); x++) {
            int s = r.getSample(x, y, 0);
            hist[s]++;
        }
    }
    IIOMetadataNode hIST = new IIOMetadataNode("hIST");
    for (int i = 0; i < hist.length; i++) {
        IIOMetadataNode n = new IIOMetadataNode("hISTEntry");
        n.setAttribute("index", "" + i);
        n.setAttribute("value", "" + hist[i]);
        hIST.appendChild(n);
    }
    return hIST;
}

Example 57 with IndexColorModel

use of java.awt.image.IndexColorModel in project cloudstack by apache.

the class ServerPaletteUpdate method handleData.

@Override
public void handleData(ByteBuffer buf, Link link) {
    if (verbose)
        System.out.println("[" + this + "] INFO: Data received: " + buf + ".");
    // (2 bytes): A 16-bit, unsigned integer. The update type. This field MUST
    // be set to UPDATETYPE_PALETTE (0x0002).
    int updateType = buf.readUnsignedShortLE();
    if (updateType != UPDATETYPE_PALETTE)
        throw new RuntimeException("Unexpected update type. Expected type: UPDATETYPE_PALETTE (0x0002), actual value: " + updateType + ", data: " + buf + ".");
    // pad2Octets (2 bytes): A 16-bit, unsigned integer. Padding. Values in this
    // field MUST be ignored.
    buf.skipBytes(2);
    // (4 bytes): A 32-bit, unsigned integer. The number of RGB triplets in the
    // paletteData field. This field MUST be set to 256 (the number of entries
    // in an 8 bpp palette).
    int numberColors = (int) buf.readUnsignedIntLE();
    if (numberColors != 256)
        throw new RuntimeException("Unexpected value for number of color field in server Palette Update packet. Expected value: 256 colors, actual value: " + numberColors + ", data: " + buf + ".");
    // (variable): An array of palette entries in RGB triplet format packed on
    // byte boundaries. The number of triplet entries is given by the
    // numberColors field.
    ByteBuffer paletteEntries = buf.readBytes(numberColors * 3);
    // In the case of a Palette Update, the client MUST update the global
    // palette on all drawing surfaces
    screen.colorMap = new IndexColorModel(8, numberColors, paletteEntries.data, paletteEntries.offset, false);
    /* DEBUG */
    buf.assertThatBufferIsFullyRead();
    buf.unref();
}