/*
    * 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.formats.psd.datareaders;
  
  import java.awt.image.BufferedImage;
  import java.io.IOException;
  import java.io.InputStream;
  import java.nio.ByteOrder;
  
  import org.apache.commons.imaging.ImagingException;
  import org.apache.commons.imaging.common.Allocator;
  import org.apache.commons.imaging.common.BinaryFileParser;
  import org.apache.commons.imaging.formats.psd.PsdHeaderInfo;
  import org.apache.commons.imaging.formats.psd.PsdImageContents;
  import org.apache.commons.imaging.formats.psd.dataparsers.DataParser;
  import org.apache.commons.imaging.mylzw.BitsToByteInputStream;
  import org.apache.commons.imaging.mylzw.MyBitInputStream;
  
  public class UncompressedDataReader implements DataReader {
  
      private final DataParser dataParser;
  
      public UncompressedDataReader(final DataParser dataParser) {
          this.dataParser = dataParser;
      }
  
      @Override
      public void readData(final InputStream is, final BufferedImage bi, final PsdImageContents imageContents, final BinaryFileParser bfp)
              throws ImagingException, IOException {
          final PsdHeaderInfo header = imageContents.header;
          final int width = header.columns;
          final int height = header.rows;
  
          final int channelCount = dataParser.getBasicChannelsCount();
          final int depth = header.depth;
          final MyBitInputStream mbis = new MyBitInputStream(is, ByteOrder.BIG_ENDIAN, false);
          // we want all samples to be bytes
          try (BitsToByteInputStream bbis = new BitsToByteInputStream(mbis, 8)) {
              final int[][][] data = new int[Allocator.check(channelCount)][Allocator.check(height)][Allocator.check(width)];
              for (int channel = 0; channel < channelCount; channel++) {
                  for (int y = 0; y < height; y++) {
                      for (int x = 0; x < width; x++) {
                          final int b = bbis.readBits(depth);
  
                          data[channel][y][x] = (byte) b;
                      }
                  }
              }
  
              dataParser.parseData(data, bi, imageContents);
          }
      }
  }