Use LCD text if the transform IsAlmostIdentityAndIntegerTranslation

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"
@@ skipping 98 matching lines @@
       return false;
     return matrix_.getDouble(0, 0) > 0.0 &&
         matrix_.getDouble(1, 1) > 0.0 &&
         matrix_.getDouble(2, 2) > 0.0;
   }
 
   // Returns true if the matrix is either identity or pure, non-fractional
   // translation.
   bool IsIdentityOrIntegerTranslation() const;
 
+  // These "Almost" methods check if the transform is very near to meet the
+  // conditions. Useful when the transform has been computed many steps and
+  // contains tiny errors but can still be treated as meeting the conditions
+  // approximately.
+  bool IsAlmostIdentity() const;
+  bool IsAlmostIdentityOrTranslation() const;
+  bool IsAlmostIdentityOrIntegerTranslation() const;
+
   // Returns true if the matrix is has only scaling and translation components.
   bool IsScaleOrTranslation() const {
     int mask = SkMatrix44::kScale_Mask | SkMatrix44::kTranslate_Mask;
     return (matrix_.getType() & ~mask) == 0;
   }
 
   // Returns true if the matrix has any perspective component that would
   // change the w-component of a homogeneous point.
   bool HasPerspective() const {
     return (matrix_.getType() & SkMatrix44::kPerspective_Mask) != 0;
@@ skipping 91 matching lines @@
                               Point3F& point) const;
 
   SkMatrix44 matrix_;
 
   // copy/assign are allowed.
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_TRANSFORM_H_