Some small improvements in error handling based on exceptions observed at zxing.org

[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 f57ae58..8f06e8d 100644 (file)
--- a/core/src/com/google/zxing/qrcode/detector/Detector.java
+++ b/core/src/com/google/zxing/qrcode/detector/Detector.java
@@ -74,6 +74,9 @@ public final class Detector {
     FinderPattern bottomLeft = info.getBottomLeft();
 
     float moduleSize = calculateModuleSize(topLeft, topRight, bottomLeft);
+    if (moduleSize < 1.0f) {
+      throw new ReaderException("Module size too small");
+    }
     int dimension = computeDimension(topLeft, topRight, bottomLeft, moduleSize);
     Version provisionalVersion = Version.getProvisionalVersionForDimension(dimension);
     int modulesBetweenFPCenters = provisionalVersion.getDimensionForVersion() - 7;