CanEncodeShort.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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 * 2 along with this work; if not, write to the Free Software Foundation,
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/*
 * @test
 * @bug 4474819
 * @summary Tests whether the PNGImageWriterSpi advertises that it is capable of
 *          writing images of TYPE_USHORT_565_RGB and TYPE_USHORT_555_RGB. The
 *          test fails if an exception is thrown.
 */

import java.awt.image.BufferedImage;
import java.util.Iterator;

import javax.imageio.ImageIO;
import javax.imageio.ImageTypeSpecifier;

public class CanEncodeShort {

    private static final int[] types = new int[] {
        BufferedImage.TYPE_USHORT_565_RGB,
        BufferedImage.TYPE_USHORT_555_RGB,
    };

    private static final String[] typeNames = new String[] {
        "TYPE_USHORT_565_RGB",
        "TYPE_USHORT_555_RGB",
    };

    public static void main(String[] args) {
        for (int i = 0; i < types.length; i++) {
            BufferedImage img = new BufferedImage(32, 32, types[i]);

            ImageTypeSpecifier spec =
                ImageTypeSpecifier.createFromRenderedImage(img);

            Iterator writers = ImageIO.getImageWriters(spec, "png");

            if (!writers.hasNext()) {
                throw new RuntimeException("Test failed: " +
                                           "no PNG writer found for type " +
                                           typeNames[i]);
            }
        }
    }
}