X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=core%2Fsrc%2Fcom%2Fgoogle%2Fzxing%2Fqrcode%2Fdetector%2FDetector.java;h=574d2d1c70bc22c91d47d9ddd8a74f4d0d0a2329;hb=23fc6b558bad94d06213bfdb360ff08d08de543b;hp=8f06e8d726d1703aaafeb5cc3cc819a1205fdfa5;hpb=748f492e437a80d6b710f92e83eddbf7c44e2d58;p=zxing.git

diff --git a/core/src/com/google/zxing/qrcode/detector/Detector.java b/core/src/com/google/zxing/qrcode/detector/Detector.java
index 8f06e8d7..574d2d1c 100644
--- a/core/src/com/google/zxing/qrcode/detector/Detector.java
+++ b/core/src/com/google/zxing/qrcode/detector/Detector.java
@@ -334,6 +334,10 @@ public final class Detector {
     int allowance = (int) (allowanceFactor * overallEstModuleSize);
     int alignmentAreaLeftX = Math.max(0, estAlignmentX - allowance);
     int alignmentAreaRightX = Math.min(image.getWidth() - 1, estAlignmentX + allowance);
+    if (alignmentAreaRightX - alignmentAreaLeftX < overallEstModuleSize * 3) {
+      throw new ReaderException("Alignment pattern is too small to search");
+    }
+
     int alignmentAreaTopY = Math.max(0, estAlignmentY - allowance);
     int alignmentAreaBottomY = Math.min(image.getHeight() - 1, estAlignmentY + allowance);