Log if a view fails to fit in the drawing cache

Large software layers won't draw if they're larger than the size of the drawing
cache, in which case this log will be triggered.

bug:7078391
Change-Id: Ib42a060b8e3b3642417df9243a086aa15b2989b1

1 files changed, 7 insertions, 4 deletions

diff --git a/core/java/android/view/View.java b/core/java/android/view/View.java
index b6f07fac5513..7cf2202f200a 100644
--- a/core/java/android/view/View.java
+++ b/core/java/android/view/View.java
@@ -12537,10 +12537,13 @@ public class View implements Drawable.Callback, KeyEvent.Callback,
             final boolean opaque = drawingCacheBackgroundColor != 0 || isOpaque();
             final boolean use32BitCache = attachInfo != null && attachInfo.mUse32BitDrawingCache;
 
-            if (width <= 0 || height <= 0 ||
-                     // Projected bitmap size in bytes
-                    (width * height * (opaque && !use32BitCache ? 2 : 4) >
-                            ViewConfiguration.get(mContext).getScaledMaximumDrawingCacheSize())) {
+            final int projectedBitmapSize = width * height * (opaque && !use32BitCache ? 2 : 4);
+            final int drawingCacheSize =
+                    ViewConfiguration.get(mContext).getScaledMaximumDrawingCacheSize();
+            if (width <= 0 || height <= 0 || projectedBitmapSize > drawingCacheSize) {
+                Log.w(VIEW_LOG_TAG, "View too large to fit into drawing cache, needs "
+                      + projectedBitmapSize + " bytes, only "
+                      + drawingCacheSize + " available");
                 destroyDrawingCache();
                 mCachingFailed = true;
                 return;