Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (c) 2015-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 */

import android.graphics.Bitmap;

public class Main {
    /**
     * Bytes per pixel definitions
     */
    public static final int ALPHA_8_BYTES_PER_PIXEL = 1;
    public static final int ARGB_4444_BYTES_PER_PIXEL = 2;
    public static final int ARGB_8888_BYTES_PER_PIXEL = 4;
    public static final int RGB_565_BYTES_PER_PIXEL = 2;

    /**
     * Returns the size in byte of an image with specific size
     * and {@link android.graphics.Bitmap.Config}
     * @param width the width of the image
     * @param height the height of the image
     * @param bitmapConfig the {@link android.graphics.Bitmap.Config} for which the size in byte
     * will be returned
     * @return
     */
    public static int getSizeInByteForBitmap(int width, int height, Bitmap.Config bitmapConfig) {
        return width * height * getPixelSizeForBitmapConfig(bitmapConfig);
    }

    /**
     * Returns the amount of bytes used by a pixel in a specific
     * {@link android.graphics.Bitmap.Config}
     * @param bitmapConfig the {@link android.graphics.Bitmap.Config} for which the size in byte
     * will be returned
     * @return
     */
    public static int getPixelSizeForBitmapConfig(Bitmap.Config bitmapConfig) {

        switch (bitmapConfig) {
        case ARGB_8888:
            return ARGB_8888_BYTES_PER_PIXEL;
        case ALPHA_8:
            return ALPHA_8_BYTES_PER_PIXEL;
        case ARGB_4444:
            return ARGB_4444_BYTES_PER_PIXEL;
        case RGB_565:
            return RGB_565_BYTES_PER_PIXEL;
        }
        throw new UnsupportedOperationException("The provided Bitmap.Config is not supported");
    }
}