content: /*
   * Copyright 2002-2019 Drew Noakes and contributors
   *
   *    Licensed 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
   *
   *        https://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.
   *
   * More information about this project is available at:
   *
   *    https://drewnoakes.com/code/exif/
   *    https://github.com/drewnoakes/metadata-extractor
   */
  package com.drew.metadata.bmp;
  
  import com.drew.lang.annotations.NotNull;
  import com.drew.lang.annotations.Nullable;
  import com.drew.metadata.TagDescriptor;
  
  import java.text.DecimalFormat;
  
  import static com.drew.metadata.bmp.BmpHeaderDirectory.*;
  
  /**
   * @author Drew Noakes https://drewnoakes.com
   * @author Nadahar
   */
  @SuppressWarnings("WeakerAccess")
  public class BmpHeaderDescriptor extends TagDescriptor<BmpHeaderDirectory>
  {
      public BmpHeaderDescriptor(@NotNull BmpHeaderDirectory directory)
      {
          super(directory);
      }
  
      @Override
      public String getDescription(int tagType)
      {
          switch (tagType) {
              case TAG_BITMAP_TYPE:
                  return getBitmapTypeDescription();
              case TAG_COMPRESSION:
                  return getCompressionDescription();
              case TAG_RENDERING:
                  return getRenderingDescription();
              case TAG_COLOR_ENCODING:
                  return getColorEncodingDescription();
              case TAG_RED_MASK:
              case TAG_GREEN_MASK:
              case TAG_BLUE_MASK:
              case TAG_ALPHA_MASK:
                  return formatHex(_directory.getLongObject(tagType), 8);
              case TAG_COLOR_SPACE_TYPE:
                  return getColorSpaceTypeDescription();
              case TAG_GAMMA_RED:
              case TAG_GAMMA_GREEN:
              case TAG_GAMMA_BLUE:
                  return formatFixed1616(_directory.getLongObject(tagType));
              case TAG_INTENT:
                  return getRenderingIntentDescription();
              default:
                  return super.getDescription(tagType);
          }
      }
  
      @Nullable
      public String getBitmapTypeDescription()
      {
          BitmapType bitmapType = _directory.getBitmapType();
          return bitmapType == null ? null : bitmapType.toString();
      }
  
      @Nullable
      public String getCompressionDescription()
      {
          //  0 = None
          //  1 = RLE 8-bit/pixel
          //  2 = RLE 4-bit/pixel
          //  3 = Bit fields (or Huffman 1D if OS22XBITMAPHEADER (size 64))
          //  4 = JPEG (or RLE 24-bit/pixel if OS22XBITMAPHEADER (size 64))
          //  5 = PNG
          // 11 = CMYK
          // 12 = CMYK RLE-8
          // 13 = CMYK RLE-4
  
          Compression compression = _directory.getCompression();
          if (compression != null) {
              return compression.toString();
          }
          Integer value = _directory.getInteger(TAG_COMPRESSION);
          return value == null ? null : "Illegal value 0x" + Integer.toHexString(value.intValue());
      }
  
      @Nullable
      public String getRenderingDescription()
      {
          RenderingHalftoningAlgorithm renderingHalftoningAlgorithm = _directory.getRendering();
          return renderingHalftoningAlgorithm == null ? null : renderingHalftoningAlgorithm.toString();
      }
  
      @Nullable
      public String getColorEncodingDescription()
      {
          ColorEncoding colorEncoding = _directory.getColorEncoding();
          return colorEncoding == null ? null : colorEncoding.toString();
      }
  
      @Nullable
      public String getColorSpaceTypeDescription()
      {
          ColorSpaceType colorSpaceType = _directory.getColorSpaceType();
          return colorSpaceType == null ? null : colorSpaceType.toString();
      }
  
      @Nullable
      public String getRenderingIntentDescription()
      {
          RenderingIntent renderingIntent = _directory.getRenderingIntent();
          return renderingIntent == null ? null : renderingIntent.toString();
      }
  
      @Nullable
      public static String formatHex(@Nullable Integer value, int digits) {
          return value == null ? null : formatHex(value.intValue() & 0xFFFFFFFFL, digits);
      }
  
      @NotNull
      public static String formatHex(int value, int digits) {
          return formatHex(value & 0xFFFFFFFFL, digits);
      }
  
      @Nullable
      public static String formatHex(@Nullable Long value, int digits) {
          return value == null ? null : formatHex(value.longValue(), digits);
      }
  
      @NotNull
      public static String formatHex(long value, int digits) {
          return String.format("0x%0"+ digits + "X", value);
      }
  
      @Nullable
      public static String formatFixed1616(Integer value) {
          return value == null ? null : formatFixed1616(value.intValue() & 0xFFFFFFFFL);
      }
  
      @NotNull
      public static String formatFixed1616(int value) {
          return formatFixed1616(value & 0xFFFFFFFFL);
      }
  
      @Nullable
      public static String formatFixed1616(Long value) {
          return value == null ? null : formatFixed1616(value.longValue());
      }
  
      @NotNull
      public static String formatFixed1616(long value) {
          Double d = (double) value / 0x10000;
          DecimalFormat format = new DecimalFormat("0.###");
          return format.format(d);
      }
  }
  