bug #5252975: guard against null bitmap object, don't NPE.

- check for null Bitmap object before using.

Change-Id: I99d85916dae45128d67be084860d66dd89ec2f95

1 files changed, 15 insertions, 1 deletions

diff --git a/gallerycommon/src/com/android/gallery3d/common/BitmapUtils.java b/gallerycommon/src/com/android/gallery3d/common/BitmapUtils.java
index df9b93fbd..29f86e056 100644
--- a/gallerycommon/src/com/android/gallery3d/common/BitmapUtils.java
+++ b/gallerycommon/src/com/android/gallery3d/common/BitmapUtils.java
@@ -114,6 +114,8 @@ public class BitmapUtils {
 
     public static Bitmap resizeDownToPixels(
             Bitmap bitmap, int targetPixels, boolean recycle) {
+        if (bitmap == null) return null;
+
         int width = bitmap.getWidth();
         int height = bitmap.getHeight();
         float scale = (float) Math.sqrt(
@@ -138,7 +140,7 @@ public class BitmapUtils {
     }
 
     private static Bitmap.Config getConfig(Bitmap bitmap) {
-        Bitmap.Config config = bitmap.getConfig();
+        Bitmap.Config config = (bitmap != null ? bitmap.getConfig() : null);
         if (config == null) {
             config = Bitmap.Config.ARGB_8888;
         }
@@ -147,6 +149,8 @@ public class BitmapUtils {
 
     public static Bitmap resizeDownBySideLength(
             Bitmap bitmap, int maxLength, boolean recycle) {
+        if (bitmap == null) return null;
+
         int srcWidth = bitmap.getWidth();
         int srcHeight = bitmap.getHeight();
         float scale = Math.min(
@@ -157,6 +161,8 @@ public class BitmapUtils {
 
     // Crops a square from the center of the original image.
     public static Bitmap cropCenter(Bitmap bitmap, boolean recycle) {
+        if (bitmap == null) return null;
+
         int width = bitmap.getWidth();
         int height = bitmap.getHeight();
         if (width == height) return bitmap;
@@ -173,6 +179,8 @@ public class BitmapUtils {
 
     public static Bitmap resizeDownAndCropCenter(Bitmap bitmap, int size,
             boolean recycle) {
+        if (bitmap == null) return null;
+
         int w = bitmap.getWidth();
         int h = bitmap.getHeight();
         int minSide = Math.min(w, h);
@@ -203,6 +211,8 @@ public class BitmapUtils {
     }
 
     public static Bitmap rotateBitmap(Bitmap source, int rotation, boolean recycle) {
+        if (source == null) return null;
+
         int w = source.getWidth();
         int h = source.getHeight();
         Matrix m = new Matrix();
@@ -261,6 +271,8 @@ public class BitmapUtils {
     }
 
     public static byte[] compressBitmap(Bitmap bitmap) {
+        if (bitmap == null) return null;
+
         ByteArrayOutputStream os = new ByteArrayOutputStream();
         bitmap.compress(Bitmap.CompressFormat.JPEG,
                 COMPRESS_JPEG_QUALITY, os);
@@ -281,6 +293,8 @@ public class BitmapUtils {
     }
 
     public static byte[] compressToBytes(Bitmap bitmap, int quality) {
+        if (bitmap == null) return null;
+
         ByteArrayOutputStream baos = new ByteArrayOutputStream(65536);
         bitmap.compress(CompressFormat.JPEG, quality, baos);
         return baos.toByteArray();