Issue 361

[zxing.git] / core / src / com / google / zxing / qrcode / encoder / ByteMatrix.java

diff --git a/core/src/com/google/zxing/qrcode/encoder/ByteMatrix.java b/core/src/com/google/zxing/qrcode/encoder/ByteMatrix.java
new file mode 100644 (file)
index 0000000..eb248a2
--- /dev/null
+++ b/core/src/com/google/zxing/qrcode/encoder/ByteMatrix.java
@@ -0,0 +1,97 @@
+/*
+ * Copyright 2008 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.qrcode.encoder;
+
+/**
+ * A class which wraps a 2D array of bytes. The default usage is signed. If you want to use it as a
+ * unsigned container, it's up to you to do byteValue & 0xff at each location.
+ *
+ * JAVAPORT: The original code was a 2D array of ints, but since it only ever gets assigned
+ * -1, 0, and 1, I'm going to use less memory and go with bytes.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
+ */
+public final class ByteMatrix {
+
+  private final byte[][] bytes;
+  private final int width;
+  private final int height;
+
+  public ByteMatrix(int width, int height) {
+    bytes = new byte[height][width];
+    this.width = width;
+    this.height = height;
+  }
+
+  public int getHeight() {
+    return height;
+  }
+
+  public int getWidth() {
+    return width;
+  }
+
+  public byte get(int x, int y) {
+    return bytes[y][x];
+  }
+
+  public byte[][] getArray() {
+    return bytes;
+  }
+
+  public void set(int x, int y, byte value) {
+    bytes[y][x] = value;
+  }
+
+  public void set(int x, int y, int value) {
+    bytes[y][x] = (byte) value;
+  }
+
+  public void set(int x, int y, boolean value) {
+    bytes[y][x] = (byte) (value ? 1 : 0);
+  }
+
+  public void clear(byte value) {
+    for (int y = 0; y < height; ++y) {
+      for (int x = 0; x < width; ++x) {
+        bytes[y][x] = value;
+      }
+    }
+  }
+
+  public String toString() {
+    StringBuffer result = new StringBuffer(2 * width * height + 2);
+    for (int y = 0; y < height; ++y) {
+      for (int x = 0; x < width; ++x) {
+        switch (bytes[y][x]) {
+          case 0:
+            result.append(" 0");
+            break;
+          case 1:
+            result.append(" 1");
+            break;
+          default:
+            result.append("  ");
+            break;
+        }
+      }
+      result.append('\n');
+    }
+    return result.toString();
+  }
+
+}