PDF417 encoder, modified from Barcode4J

git-svn-id: http://zxing.googlecode.com/svn/trunk@1897 59b500cc-1b3d-0410-9834-0bbf25fbcc57

AUTHORS

@@ -31,6 +31,7 @@ gcstang
 Hannes Erven
 hypest (Barcorama project)
 Isaac Potoczny-Jones
+Jacob Haynes (Google)
 Jeff Breidenbach (Google)
 John Connolly (Bug Labs)
 Jonas Petersson (Prisjakt)

NOTICE

@@ -0,0 +1,11 @@
+--------------------------------------------------------------------------------
+NOTICES FOR BARCODE4J
+--------------------------------------------------------------------------------
+
+Barcode4J
+Copyright 2002-2010 Jeremias Märki
+Copyright 2005-2006 Dietmar Bürkle
+
+Portions of this software were contributed under section 5 of the
+Apache License. Contributors are listed under:
+http://barcode4j.sourceforge.net/contributors.html

core/src/com/google/zxing/MultiFormatWriter.java

@@ -23,6 +23,7 @@
 import com.google.zxing.oned.EAN8Writer;
 import com.google.zxing.oned.ITFWriter;
 import com.google.zxing.oned.UPCAWriter;
+import com.google.zxing.pdf417.encoder.PDF417Writer;
 import com.google.zxing.qrcode.QRCodeWriter;
 
 import java.util.Hashtable;
@@ -59,6 +60,8 @@ public BitMatrix encode(String contents, BarcodeFormat format, int width, int he
       writer = new Code128Writer();
     } else if (format == BarcodeFormat.ITF) {
       writer = new ITFWriter();
+    } else if (format == BarcodeFormat.PDF_417) {
+      writer = new PDF417Writer();
     } else {
       throw new IllegalArgumentException("No encoder available for format " + format);
     }

core/src/com/google/zxing/pdf417/encoder/BarcodeMatrix.java

@@ -0,0 +1,78 @@
+/*
+ * Copyright 2011 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.google.zxing.pdf417.encoder;
+
+/**
+ * Holds all of the information for a barcode in a format where it can be easily accessable
+ *
+ * @author Jacob Haynes
+ */
+final class BarcodeMatrix {
+
+  private final BarcodeRow[] matrix;
+  private int currentRow;
+  private final int height;
+  private final int width;
+
+  /**
+   * @param height the height of the matrix (Rows)
+   * @param width  the width of the matrix (Cols)
+   */
+  BarcodeMatrix(int height, int width) {
+    matrix = new BarcodeRow[height + 2];
+    //Initializes the array to the correct width
+    for (int i = 0, matrixLength = matrix.length; i < matrixLength; i++) {
+      matrix[i] = new BarcodeRow((width + 4) * 17 + 1);
+    }
+    this.width = width * 17;
+    this.height = height + 2;
+    this.currentRow = 0;
+  }
+
+  void set(int x, int y, byte value) {
+    matrix[y].set(x, value);
+  }
+
+  void setMatrix(int x, int y, boolean black) {
+    set(x, y, (byte) (black ? 1 : 0));
+  }
+
+  void startRow() {
+    ++currentRow;
+  }
+
+  BarcodeRow getCurrentRow() {
+    return matrix[currentRow];
+  }
+
+  byte[][] getMatrix() {
+    return getScaledMatrix(1, 1);
+  }
+
+  byte[][] getScaledMatrix(int Scale) {
+    return getScaledMatrix(Scale, Scale);
+  }
+
+  byte[][] getScaledMatrix(int xScale, int yScale) {
+    byte[][] matrixOut = new byte[height * yScale][width * xScale];
+    int yMax = height * yScale;
+    for (int ii = 0; ii < yMax; ii++) {
+      matrixOut[yMax - ii - 1] = matrix[ii / yScale].getScaledRow(xScale);
+    }
+    return matrixOut;
+  }
+}

core/src/com/google/zxing/pdf417/encoder/BarcodeRow.java

@@ -0,0 +1,85 @@
+/*
+ * Copyright 2011 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.google.zxing.pdf417.encoder;
+
+/**
+ * @author Jacob Haynes
+ */
+final class BarcodeRow {
+
+  private final byte[] row;
+  //A tacker for position in the bar
+  private int currentLocation;
+
+  /**
+   * Creates a Barcode row of the width
+   *
+   * @param width
+   */
+  BarcodeRow(int width) {
+    this.row = new byte[width];
+    currentLocation = 0;
+  }
+
+  /**
+   * Sets a specific location in the bar
+   *
+   * @param x The location in the bar
+   * @param value Black if true, white if false;
+   */
+  void set(int x, byte value) {
+    row[x] = value;
+  }
+
+  /**
+   * Sets a specific location in the bar
+   *
+   * @param x The location in the bar
+   * @param black Black if true, white if false;
+   */
+  void set(int x, boolean black) {
+    row[x] = (byte) (black ? 1 : 0);
+  }
+
+  /**
+   * @param black A boolean which is true if the bar black false if it is white
+   * @param width How many spots wide the bar is.
+   */
+  void addBar(boolean black, int width) {
+    for (int ii = 0; ii < width; ii++) {
+      set(currentLocation++, black);
+    }
+  }
+
+  byte[] getRow() {
+    return row;
+  }
+
+  /**
+   * This function scales the row
+   *
+   * @param scale How much you want the image to be scaled, must be greater than or equal to 1.
+   * @return the scaled row
+   */
+  byte[] getScaledRow(int scale) {
+    byte[] output = new byte[row.length * scale];
+    for (int ii = 0; ii < row.length * scale; ii++) {
+      output[ii] = row[ii / scale];
+    }
+    return output;
+  }
+}