content: /*
   * Copyright 2013 ZXing authors
   *
   * 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
   *
   *      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 com.ailiwean.core.zxing.core.aztec;
  
  import com.ailiwean.core.zxing.core.BarcodeFormat;
  import com.ailiwean.core.zxing.core.EncodeHintType;
  import com.ailiwean.core.zxing.core.Writer;
  import com.ailiwean.core.zxing.core.aztec.encoder.AztecCode;
  import com.ailiwean.core.zxing.core.aztec.encoder.Encoder;
  import com.ailiwean.core.zxing.core.common.BitMatrix;
  
  import java.nio.charset.Charset;
  import java.nio.charset.StandardCharsets;
  import java.util.Map;
  
  /**
   * Renders an Aztec code as a {@link BitMatrix}.
   */
  public final class AztecWriter implements Writer {
  
    @Override
    public BitMatrix encode(String contents, BarcodeFormat format, int width, int height) {
      return encode(contents, format, width, height, null);
    }
  
    @Override
    public BitMatrix encode(String contents, BarcodeFormat format, int width, int height, Map<EncodeHintType,?> hints) {
      Charset charset = StandardCharsets.ISO_8859_1;
      int eccPercent = Encoder.DEFAULT_EC_PERCENT;
      int layers = Encoder.DEFAULT_AZTEC_LAYERS;
      if (hints != null) {
        if (hints.containsKey(EncodeHintType.CHARACTER_SET)) {
          charset = Charset.forName(hints.get(EncodeHintType.CHARACTER_SET).toString());
        }
        if (hints.containsKey(EncodeHintType.ERROR_CORRECTION)) {
          eccPercent = Integer.parseInt(hints.get(EncodeHintType.ERROR_CORRECTION).toString());
        }
        if (hints.containsKey(EncodeHintType.AZTEC_LAYERS)) {
          layers = Integer.parseInt(hints.get(EncodeHintType.AZTEC_LAYERS).toString());
        }
      }
      return encode(contents, format, width, height, charset, eccPercent, layers);
    }
  
    private static BitMatrix encode(String contents, BarcodeFormat format,
                                    int width, int height,
                                    Charset charset, int eccPercent, int layers) {
      if (format != BarcodeFormat.AZTEC) {
        throw new IllegalArgumentException("Can only encode AZTEC, but got " + format);
      }
      AztecCode aztec = Encoder.encode(contents.getBytes(charset), eccPercent, layers);
      return renderResult(aztec, width, height);
    }
  
    private static BitMatrix renderResult(AztecCode code, int width, int height) {
      BitMatrix input = code.getMatrix();
      if (input == null) {
        throw new IllegalStateException();
      }
      int inputWidth = input.getWidth();
      int inputHeight = input.getHeight();
      int outputWidth = Math.max(width, inputWidth);
      int outputHeight = Math.max(height, inputHeight);
  
      int multiple = Math.min(outputWidth / inputWidth, outputHeight / inputHeight);
      int leftPadding = (outputWidth - (inputWidth * multiple)) / 2;
      int topPadding = (outputHeight - (inputHeight * multiple)) / 2;
  
      BitMatrix output = new BitMatrix(outputWidth, outputHeight);
  
      for (int inputY = 0, outputY = topPadding; inputY < inputHeight; inputY++, outputY += multiple) {
        // Write the contents of this row of the barcode
        for (int inputX = 0, outputX = leftPadding; inputX < inputWidth; inputX++, outputX += multiple) {
          if (input.get(inputX, inputY)) {
            output.setRegion(outputX, outputY, multiple, multiple);
          }
        }
      }
      return output;
    }
  }
  