/*
 * Copyright (c) 2012, Harald Kuhr
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name "TwelveMonkeys" nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.twelvemonkeys.imageio.plugins.pict;

import com.twelvemonkeys.imageio.stream.ByteArrayImageInputStream;
import com.twelvemonkeys.imageio.util.ImageWriterAbstractTestCase;
import org.junit.Test;

import javax.imageio.ImageIO;
import javax.imageio.ImageWriter;
import javax.imageio.stream.ImageInputStream;
import javax.imageio.stream.ImageOutputStream;
import java.awt.color.ColorSpace;
import java.awt.image.BufferedImage;
import java.awt.image.RenderedImage;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;

import static org.junit.Assert.*;

/**
 * PICTImageWriterTest
 *
 * @author <a href="mailto:harald.kuhr@gmail.com">Harald Kuhr</a>
 * @author last modified by $Author: haraldk$
 * @version $Id: PICTImageWriterTest.java,v 1.0 20.01.12 12:26 haraldk Exp$
 */
public class PICTImageWriterTest extends ImageWriterAbstractTestCase {
    private final PICTImageWriterSpi provider = new PICTImageWriterSpi();

    @Override
    protected ImageWriter createImageWriter() {
        return new PICTImageWriter(provider);
    }

    @Override
    protected List<? extends RenderedImage> getTestData() {
        return Arrays.asList(
                new BufferedImage(100, 100, BufferedImage.TYPE_INT_RGB),
                new BufferedImage(32, 20, BufferedImage.TYPE_INT_BGR),
                new BufferedImage(32, 20, BufferedImage.TYPE_INT_ARGB),
                new BufferedImage(30, 20, BufferedImage.TYPE_3BYTE_BGR),
                new BufferedImage(30, 20, BufferedImage.TYPE_4BYTE_ABGR),
                new BufferedImage(32, 20, BufferedImage.TYPE_BYTE_INDEXED)
//                new BufferedImage(32, 20, BufferedImage.TYPE_BYTE_GRAY)   // With Java8/LittleCMS gray values are way off...
//                new BufferedImage(32, 20, BufferedImage.TYPE_BYTE_BINARY) // Packed data does not work
        );
    }

    @Test
    public void testWriteReadCompare() throws IOException {
        ImageWriter writer = createImageWriter();

        List<? extends RenderedImage> testData = getTestData();
        for (int i = 0; i < testData.size(); i++) {
            RenderedImage image = testData.get(i);
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ImageOutputStream stream = ImageIO.createImageOutputStream(buffer);
            writer.setOutput(stream);

            BufferedImage original = drawSomething((BufferedImage) image);

            try {
                writer.write(original);
            }
            catch (IOException e) {
                fail(e.getMessage());
            }
            finally {
                stream.close(); // Force data to be written
            }

            assertTrue("No image data written", buffer.size() > 0);

            ImageInputStream input = new ByteArrayImageInputStream(buffer.toByteArray());
            BufferedImage written = ImageIO.read(input);

            assertNotNull(written);
            assertEquals(original.getWidth(), written.getWidth());
            assertEquals(original.getHeight(), written.getHeight());

            for (int y = 0; y < original.getHeight(); y++) {
                for (int x = 0; x < original.getWidth(); x++) {
                    int originalRGB = original.getRGB(x, y);
                    int writtenRGB = written.getRGB(x, y);

                    int expectedR = (originalRGB & 0xff0000) >> 16;
                    int actualR = (writtenRGB & 0xff0000) >> 16;
                    int expectedG = (originalRGB & 0x00ff00) >> 8;
                    int actualG = (writtenRGB & 0x00ff00) >> 8;
                    int expectedB = originalRGB & 0x0000ff;
                    int actualB = writtenRGB & 0x0000ff;

                    if (original.getColorModel().getColorSpace().getType() == ColorSpace.TYPE_GRAY) {
                        // NOTE: For some reason, gray data seems to be one step off...
                        // ...and vary with different backing CMSs... :-(
                        assertTrue(String.format("original 0x%08x != gray! (%d,%d)", originalRGB, x, y), expectedR == expectedG && expectedG == expectedB);
                        assertTrue(String.format("written  0x%08x != gray! (%d,%d)", writtenRGB, x, y), actualR == actualG && actualG == actualB);
                    }
                    else {
                        assertEquals(String.format("Test data %d R(%d,%d)", i, x, y), expectedR, actualR);
                        assertEquals(String.format("Test data %d G(%d,%d)", i, x, y), expectedG, actualG);
                        assertEquals(String.format("Test data %d B(%d,%d)", i, x, y), expectedB, actualB);
                    }
                }
            }
        }
    }
}
