commit fe69b5037817fdf4e64e96ca8b2b50eae6ed4f2c
author reed <reed@google.com> Mon Sep 12 06:31:48 2016 -0700
committer Commit bot <commit-bot@chromium.org> Mon Sep 12 06:31:48 2016 -0700
tree 421093c1c354b51d57f45cb730d3f58e297ecd1c
parent 0bed5bb8bee67e526047897a161bb703e2ffc694

check for identity in translate

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2331943002

TBR=
NOTREECHECKS=True
NOTRY=True

Review-Url: https://codereview.chromium.org/2331943002

src/core/SkCanvas.cpp

diff --git a/src/core/SkCanvas.cpp b/src/core/SkCanvas.cpp
index 6e898fa..e53a104 100644
--- a/src/core/SkCanvas.cpp
+++ b/src/core/SkCanvas.cpp
@@ -1457,14 +1457,16 @@
 /////////////////////////////////////////////////////////////////////////////
 
 void SkCanvas::translate(SkScalar dx, SkScalar dy) {
-    this->checkForDeferredSave();
-    fDeviceCMDirty = true;
-    fMCRec->fMatrix.preTranslate(dx,dy);
+    if (dx || dy) {
+        this->checkForDeferredSave();
+        fDeviceCMDirty = true;
+        fMCRec->fMatrix.preTranslate(dx,dy);
 
-    // Translate shouldn't affect the is-scale-translateness of the matrix.
-    SkASSERT(fIsScaleTranslate == fMCRec->fMatrix.isScaleTranslate());
+        // Translate shouldn't affect the is-scale-translateness of the matrix.
+        SkASSERT(fIsScaleTranslate == fMCRec->fMatrix.isScaleTranslate());
 
-    this->didTranslate(dx,dy);
+        this->didTranslate(dx,dy);
+    }
 }
 
 void SkCanvas::scale(SkScalar sx, SkScalar sy) {