Little bug fix affecting QR Codes that run all the way to the left/top edge of an...

[zxing.git] / core / src / com / google / zxing / qrcode / detector / Detector.java

diff --git a/core/src/com/google/zxing/qrcode/detector/Detector.java b/core/src/com/google/zxing/qrcode/detector/Detector.java
index 356defa..87a08fb 100644 (file)
--- a/core/src/com/google/zxing/qrcode/detector/Detector.java
+++ b/core/src/com/google/zxing/qrcode/detector/Detector.java
@@ -178,13 +178,15 @@ public final class Detector {
     // Now count other way -- don't run off image though of course
     int otherToX = fromX - (toX - fromX);
     if (otherToX < 0) {
-      otherToX = 0;
+      // "to" should the be the first value not included, so, the first value off
+      // the edge is -1
+      otherToX = -1;
     } else if (otherToX >= image.getWidth()) {
       otherToX = image.getWidth();
     }
     int otherToY = fromY - (toY - fromY);
     if (otherToY < 0) {
-      otherToY = 0;
+      otherToY = -1;
     } else if (otherToY >= image.getHeight()) {
       otherToY = image.getHeight();
     }