Guard against exception case discovered in new DM code, clean up its formatting a bit

[zxing.git] / core / src / com / google / zxing / common / DefaultGridSampler.java

diff --git a/core/src/com/google/zxing/common/DefaultGridSampler.java b/core/src/com/google/zxing/common/DefaultGridSampler.java
index 9233ef8..74c9e7c 100644 (file)
--- a/core/src/com/google/zxing/common/DefaultGridSampler.java
+++ b/core/src/com/google/zxing/common/DefaultGridSampler.java
@@ -46,6 +46,9 @@ public final class DefaultGridSampler extends GridSampler {
                               int dimensionX,
                               int dimensionY,
                               PerspectiveTransform transform) throws NotFoundException {
+    if (dimensionX <= 0 || dimensionY <= 0) {
+      throw NotFoundException.getNotFoundInstance();      
+    }
     BitMatrix bits = new BitMatrix(dimensionX, dimensionY);
     float[] points = new float[dimensionX << 1];
     for (int y = 0; y < dimensionY; y++) {