Pinch/Zoom Infrastructure & Plumbing CL

ui/gfx/transform.h

Index: ui/gfx/transform.h
diff --git a/ui/gfx/transform.h b/ui/gfx/transform.h
index 5e3b83033403e442f455e5b7dce4623b4c0b4f58..5440aac71f5bffa891d5ed16db392830009a77c4 100644
--- a/ui/gfx/transform.h
+++ b/ui/gfx/transform.h
@@ -89,6 +89,9 @@ class GFX_EXPORT Transform {
   // to |this|.
   void Scale(SkMScalar x, SkMScalar y);
   void Scale3d(SkMScalar x, SkMScalar y, SkMScalar z);
+  gfx::Vector2dF Scale2d() const {
+    return gfx::Vector2dF(matrix_.get(0, 0), matrix_.get(1, 1));
+  }
 
   // Applies the current transformation on a translation and assigns the result
   // to |this|.
@@ -136,6 +139,11 @@ class GFX_EXPORT Transform {
   // translation.
   bool IsIdentityOrIntegerTranslation() const;
 
+  // Returns true if the matrix had only scaling components.
+  bool IsScale2d() const {
+    return !(matrix_.getType() & ~SkMatrix44::kScale_Mask);
+  }
+
   // Returns true if the matrix is has only scaling and translation components.
   bool IsScaleOrTranslation() const {
     int mask = SkMatrix44::kScale_Mask | SkMatrix44::kTranslate_Mask;