/*
    * 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 org.apache.commons.imaging.roundtrip;
  
  import java.awt.image.BufferedImage;
  
  final class TestImages {
  
      static BufferedImage createArgbBitmapImage(final int width, final int height) {
          final BufferedImage result = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
          for (int x = 0; x < width; x++) {
              for (int y = 0; y < height; y++) {
                  // alternating black and white.
                  final int modulator = y + 2; // make sure lines vary.
                  final int argb = (x + y) % modulator == 0 ? 0xff000000 : 0xffffffff;
                  result.setRGB(x, y, argb);
              }
          }
          return result;
      }
  
      static BufferedImage createArgbGrayscaleImage(final int width, final int height) {
          final BufferedImage result = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
          for (int x = 0; x < width; x++) {
              for (int y = 0; y < height; y++) {
                  final int value = 256 * (x + y) / (width + height);
                  final int argb = 0xff << 24 | value << 16 | value << 8 | value << 0;
  
                  result.setRGB(x, y, argb);
              }
          }
          return result;
      }
  
      static BufferedImage createBitmapBitmapImage(final int width, final int height) {
          final BufferedImage result = new BufferedImage(width, height, BufferedImage.TYPE_BYTE_BINARY);
          for (int x = 0; x < width; x++) {
              for (int y = 0; y < height; y++) {
                  // alternating black and white.
                  final int modulator = y + 2; // make sure lines vary.
                  final int argb = (x + y) % modulator == 0 ? 0xff000000 : 0xffffffff;
                  result.setRGB(x, y, argb);
              }
          }
          return result;
      }
  
      static BufferedImage createFullColorImage(final int width, final int height) {
          final BufferedImage result = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
          for (int x = 0; x < width; x++) {
              for (int y = 0; y < height; y++) {
                  final int red = x * 255 / width;
                  final int green = y * 255 / height;
                  final int blue = (x + y) * 255 / (width + height);
                  final int argb = 0xff << 24 | red << 16 | green << 8 | blue << 0;
                  result.setRGB(x, y, argb);
              }
          }
          return result;
      }
  
      static BufferedImage createGrayscaleGrayscaleImage(final int width, final int height) {
          final BufferedImage result = new BufferedImage(width, height, BufferedImage.TYPE_BYTE_GRAY);
          for (int x = 0; x < width; x++) {
              for (int y = 0; y < height; y++) {
                  final int value = 256 * (x + y) / (width + height);
                  final int argb = 0xff << 24 | value << 16 | value << 8 | value << 0;
  
                  result.setRGB(x, y, argb);
              }
          }
          return result;
      }
  
      static BufferedImage createLimitedColorImage(final int width, final int height) {
          final int[] colors = { 0xffffffff, 0xff000000, 0xfff00000, 0xff0000ff, 0xff123456, 0xfffefeff, 0xff7f817f, };
  
          final BufferedImage result = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
          for (int x = 0; x < width; x++) {
              for (int y = 0; y < height; y++) {
                  final int argb = colors[(x + y) % colors.length];
                  result.setRGB(x, y, argb);
              }
          }
          return result;
     }
 
     private TestImages() {
     }
 }