Add gfx::Transform::TransformBox and TransformBoxReverse

ui/gfx/transform.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_GFX_TRANSFORM_H_
 #define UI_GFX_TRANSFORM_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "third_party/skia/include/utils/SkMatrix44.h"
 #include "ui/gfx/gfx_export.h"
 #include "ui/gfx/vector2d_f.h"
 
 namespace gfx {
 
+class BoxF;
 class RectF;
 class Point;
 class Point3F;
 class Vector3dF;
 
 // 4x4 transformation matrix. Transform is cheap and explicitly allows
 // copy/assign.
 class GFX_EXPORT Transform {
  public:
 
@@ skipping 160 matching lines @@
   void TransformPoint(Point* point) const;
 
   // Applies the reverse transformation on the point. Returns true if the
   // transformation can be inverted.
   bool TransformPointReverse(Point3F* point) const;
 
   // Applies the reverse transformation on the point. Returns true if the
   // transformation can be inverted. Rounds the result to the nearest point.
   bool TransformPointReverse(Point* point) const;
 
-  // Applies transformation on the rectangle. Returns true if the transformed
-  // rectangle was axis aligned. If it returns false, rect will be the
-  // smallest axis aligned bounding box containing the transformed rect.
+  // Applies transformation on the given rect. After the function completes,
+  // |rect| will be the smallest axis aligned bounding rect containing the
+  // transformed rect.
   void TransformRect(RectF* rect) const;
 
-  // Applies the reverse transformation on the rectangle. Returns true if
-  // the transformed rectangle was axis aligned. If it returns false,
-  // rect will be the smallest axis aligned bounding box containing the
-  // transformed rect.
+  // Applies the reverse transformation on the given rect. After the function
+  // completes, |rect| will be the smallest axis aligned bounding rect
+  // containing the transformed rect. Returns false if the matrix cannot be
+  // inverted.
   bool TransformRectReverse(RectF* rect) const;
 
+  // Applies transformation on the given box. After the function completes,
+  // |box| will be the smallest axis aligned bounding box containing the
+  // transformed box.
+  void TransformBox(BoxF* box) const;
+
+  // Applies the reverse transformation on the given box. After the function
+  // completes, |box| will be the smallest axis aligned bounding box
+  // containing the transformed box. Returns false if the matrix cannot be
+  // inverted.
+  bool TransformBoxReverse(BoxF* box) const;
+
   // Decomposes |this| and |from|, interpolates the decomposed values, and
   // sets |this| to the reconstituted result. Returns false if either matrix
   // can't be decomposed. Uses routines described in this spec:
   // http://www.w3.org/TR/css3-3d-transforms/.
   //
   // Note: this call is expensive since we need to decompose the transform. If
   // you're going to be calling this rapidly (e.g., in an animation) you should
   // decompose once using gfx::DecomposeTransforms and reuse your
   // DecomposedTransform.
   bool Blend(const Transform& from, double progress);
@@ skipping 23 matching lines @@
                               Point3F* point) const;
 
   SkMatrix44 matrix_;
 
   // copy/assign are allowed.
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_TRANSFORM_H_