SquirrelJME/SquirrelJME

// -*- Mode: Java; indent-tabs-mode: t; tab-width: 4 -*-
// ---------------------------------------------------------------------------
// SquirrelJME
//     Copyright (C) Stephanie Gawroriski <xer@multiphasicapps.net>
// ---------------------------------------------------------------------------
// SquirrelJME is under the Mozilla Public License Version 2.0.
// See license.mkd for licensing and copyright information.
// ---------------------------------------------------------------------------

package cc.squirreljme.runtime.lcdui.image;

import cc.squirreljme.jvm.mle.callbacks.NativeImageLoadCallback;
import cc.squirreljme.runtime.cldc.debug.Debugging;
import java.io.DataInputStream;
import java.io.InputStream;
import javax.microedition.lcdui.Image;

/**
 * This class is used to process JPEG image files.
 *
 * @since 2019/05/06
 */
public final class JPEGReader
    implements ImageReader
{
    /** The input data. */
    protected final DataInputStream in;
    
    /** The image loader to use. */
    protected final NativeImageLoadCallback loader;
    
    /**
     * Initializes the reader.
     *
     * @param __in The stream to read from.
     * @param __loader The image loader to use.
     * @throws NullPointerException On null arguments.
     * @since 2019/05/06
     */
    public JPEGReader(InputStream __in, NativeImageLoadCallback __loader)
        throws NullPointerException
    {
        if (__in == null || __loader == null)
            throw new NullPointerException("NARG");
        
        this.in = new DataInputStream(__in);
        this.loader = __loader;
    }
    
    /**
     * Parses the JPEG.
     *
     * @since 2019/05/06
     */
    @Override
    public void parse()
    {
        DataInputStream in = this.in;
        NativeImageLoadCallback loader = this.loader;
        
        Debugging.todoNote("Implement JPEG decoding", new Object[] {});
        
        loader.initialize(4, 4,
            false, false);
        loader.addImage(new int[16], 0, 16,
            0, false);
    }
}