From: srowen <srowen@59b500cc-1b3d-0410-9834-0bbf25fbcc57>
Date: Wed, 11 Aug 2010 13:59:48 +0000 (+0000)
Subject: Add result points for UPC EAN metadata extension
X-Git-Url: http://git.rot13.org/?p=zxing.git;a=commitdiff_plain;h=118cc9f113634f4d6227e7ccc2ec6137c52999af

Add result points for UPC EAN metadata extension

git-svn-id: http://zxing.googlecode.com/svn/trunk@1519 59b500cc-1b3d-0410-9834-0bbf25fbcc57
---

diff --git a/android/src/com/google/zxing/client/android/CaptureActivity.java b/android/src/com/google/zxing/client/android/CaptureActivity.java
index 687be895..02437ea9 100755
--- a/android/src/com/google/zxing/client/android/CaptureActivity.java
+++ b/android/src/com/google/zxing/client/android/CaptureActivity.java
@@ -506,8 +506,13 @@ public final class CaptureActivity extends Activity implements SurfaceHolder.Cal
       paint.setColor(getResources().getColor(R.color.result_points));
       if (points.length == 2) {
         paint.setStrokeWidth(4.0f);
-        canvas.drawLine(points[0].getX(), points[0].getY(), points[1].getX(),
-            points[1].getY(), paint);
+        drawLine(canvas, paint, points[0], points[1]);
+      } else if (points.length == 4 &&
+                 (rawResult.getBarcodeFormat().equals(BarcodeFormat.UPC_A)) ||
+                 (rawResult.getBarcodeFormat().equals(BarcodeFormat.EAN_13))) {
+        // Hacky special case -- draw two lines, for the barcode and metadata
+        drawLine(canvas, paint, points[0], points[1]);
+        drawLine(canvas, paint, points[2], points[3]);
       } else {
         paint.setStrokeWidth(10.0f);
         for (ResultPoint point : points) {
@@ -517,6 +522,10 @@ public final class CaptureActivity extends Activity implements SurfaceHolder.Cal
     }
   }
 
+  private static void drawLine(Canvas canvas, Paint paint, ResultPoint a, ResultPoint b) {
+    canvas.drawLine(a.getX(), a.getY(), b.getX(), b.getY(), paint);
+  }
+
   // Put up our own UI for how to handle the decoded contents.
   private void handleDecodeInternally(Result rawResult, Bitmap barcode) {
     statusView.setVisibility(View.GONE);
diff --git a/core/src/com/google/zxing/Result.java b/core/src/com/google/zxing/Result.java
index 9223ceb7..ee1af527 100644
--- a/core/src/com/google/zxing/Result.java
+++ b/core/src/com/google/zxing/Result.java
@@ -28,7 +28,7 @@ public final class Result {
 
   private final String text;
   private final byte[] rawBytes;
-  private final ResultPoint[] resultPoints;
+  private ResultPoint[] resultPoints;
   private final BarcodeFormat format;
   private Hashtable resultMetadata;
   private final long timestamp;
@@ -117,6 +117,17 @@ public final class Result {
     }
   }
 
+  public void addResultPoints(ResultPoint[] newPoints) {
+    if (resultPoints == null) {
+      resultPoints = newPoints;
+    } else if (newPoints != null && newPoints.length > 0) {
+      ResultPoint[] allPoints = new ResultPoint[resultPoints.length + newPoints.length];
+      System.arraycopy(resultPoints, 0, allPoints, 0, resultPoints.length);
+      System.arraycopy(newPoints, 0, allPoints, resultPoints.length, newPoints.length);
+      resultPoints = allPoints;
+    }
+  }
+
   public long getTimestamp() {
     return timestamp;
   }
diff --git a/core/src/com/google/zxing/oned/UPCEANExtensionSupport.java b/core/src/com/google/zxing/oned/UPCEANExtensionSupport.java
index f883566d..dea116d6 100644
--- a/core/src/com/google/zxing/oned/UPCEANExtensionSupport.java
+++ b/core/src/com/google/zxing/oned/UPCEANExtensionSupport.java
@@ -22,6 +22,7 @@ import com.google.zxing.BarcodeFormat;
 import com.google.zxing.NotFoundException;
 import com.google.zxing.Result;
 import com.google.zxing.ResultMetadataType;
+import com.google.zxing.ResultPoint;
 import com.google.zxing.common.BitArray;
 
 final class UPCEANExtensionSupport {
@@ -34,18 +35,25 @@ final class UPCEANExtensionSupport {
   private final int[] decodeMiddleCounters = new int[4];
   private final StringBuffer decodeRowStringBuffer = new StringBuffer();
 
-  Result decodeRow(BitArray row, int rowOffset) throws NotFoundException {
+  Result decodeRow(int rowNumber, BitArray row, int rowOffset) throws NotFoundException {
 
     int[] extensionStartRange = UPCEANReader.findGuardPattern(row, rowOffset, false, EXTENSION_START_PATTERN);
 
     StringBuffer result = decodeRowStringBuffer;
     result.setLength(0);
-    decodeMiddle(row, extensionStartRange, result);
+    int end = decodeMiddle(row, extensionStartRange, result);
 
     String resultString = result.toString();
     Hashtable extensionData = parseExtensionString(resultString);
 
-    Result extensionResult = new Result(resultString, null, null, BarcodeFormat.UPC_EAN_EXTENSION);
+    Result extensionResult =
+        new Result(resultString,
+                   null,
+                   new ResultPoint[] {
+                       new ResultPoint((extensionStartRange[0] + extensionStartRange[1]) / 2.0f, (float) rowNumber),
+                       new ResultPoint((float) end, (float) rowNumber),
+                   },
+                   BarcodeFormat.UPC_EAN_EXTENSION);
     if (extensionData != null) {
       extensionResult.putAllMetadata(extensionData);
     }
@@ -72,12 +80,14 @@ final class UPCEANExtensionSupport {
       if (bestMatch >= 10) {
         lgPatternFound |= 1 << (4 - x);
       }
-      // Read off separator
-      while (rowOffset < end && !row.get(rowOffset)) {
-        rowOffset++;
-      }
-      while (rowOffset < end && row.get(rowOffset)) {
-        rowOffset++;
+      if (x != 4) {
+        // Read off separator if not last
+        while (rowOffset < end && !row.get(rowOffset)) {
+          rowOffset++;
+        }
+        while (rowOffset < end && row.get(rowOffset)) {
+          rowOffset++;
+        }
       }
     }
 
diff --git a/core/src/com/google/zxing/oned/UPCEANReader.java b/core/src/com/google/zxing/oned/UPCEANReader.java
index 7b4ea5e4..6de318ee 100644
--- a/core/src/com/google/zxing/oned/UPCEANReader.java
+++ b/core/src/com/google/zxing/oned/UPCEANReader.java
@@ -186,8 +186,9 @@ public abstract class UPCEANReader extends OneDReader {
         format);
 
     try {
-      Result extensionResult = extensionReader.decodeRow(row, endRange[1]);
+      Result extensionResult = extensionReader.decodeRow(rowNumber, row, endRange[1]);
       decodeResult.putAllMetadata(extensionResult.getResultMetadata());
+      decodeResult.addResultPoints(extensionResult.getResultPoints());
     } catch (ReaderException re) {
       // continue
     }