modules/swfutils/src/java/flash/swf/SwfUtils.java

/*
 *
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */

package flash.swf;

import java.awt.Color;

/**
 * A utility methods for color, twips, and unicode conversion.
 */
public class SwfUtils implements SwfConstants
{
    /**
     * Forces a value within the range of 0 to 255.
     *
     * @param raw the initial value
     * @return a value forced between 0 and 255
     */
    public static int applyRange255(int raw)
    {
        if (raw < 0)
            raw = 0;
        else if (raw > 255)
            raw = 255;

        return raw;
    }

    /**
     * @param color a color object
     * @return integer representation, as 0xAARRGGBB
     */
    public static int colorToInt(Color color)
    {
        return ((color.getBlue() & 0xFF)
                | ((color.getGreen() & 0xFF) << 8)
                | ((color.getRed() & 0xFF) << 16)
                | ((color.getAlpha() & 0xFF) << 24));
    }

    /**
     * @param r
     * @param g
     * @param b
     * @return 0x00RRGGBB
     */
    public static int colorToInt(int r, int g, int b)
    {
        return ((b & 0xFF)
                | ((g & 0xFF) << 8)
                | ((r & 0xFF) << 16));
    }

    /**
     * @param r
     * @param g
     * @param b
     * @param a
     * @return 0xAARRGGBB
     */
    public static int colorToInt(int r, int g, int b, int a)
    {
        return ((b & 0xFF)
                | ((g & 0xFF) << 8)
                | ((r & 0xFF) << 16)
                | ((a & 0xFF) << 24));
    }

    /**
     * @param i as 0xAARRGGBB
     * @return
     */
    public static Color intToColor(int i)
    {
        return new Color((i >> 16) & 0xFF, i >> 8 & 0xFF, i & 0xFF, i >> 24 & 0xFF);
    }

    public static int toTwips(double d)
    {
        return (int)Math.rint(d * TWIPS_PER_PIXEL);
    }

    public static double fromTwips(int d)
    {
        return d / TWIPS_PER_PIXEL;
    }

    public static String toUnicodePoint(char c)
    {
        StringBuilder sb = new StringBuilder(5);
        for (int i = 3; i >= 0; i--)
        {
            sb.append(Character.forDigit((c >> (4 * i)) & 15, 16));
        }
        return sb.toString();
    }
}