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      1 /*
      2  * Copyright (C) 2013 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
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      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #ifndef InterpolatedTransformOperation_h
     32 #define InterpolatedTransformOperation_h
     33 
     34 #include "platform/transforms/TransformOperation.h"
     35 #include "platform/transforms/TransformOperations.h"
     36 
     37 namespace blink {
     38 
     39 // This class is an implementation detail for deferred interpolations.
     40 class PLATFORM_EXPORT InterpolatedTransformOperation : public TransformOperation {
     41 public:
     42     static PassRefPtr<InterpolatedTransformOperation> create(const TransformOperations& from, const TransformOperations& to, double progress)
     43     {
     44         return adoptRef(new InterpolatedTransformOperation(from, to, progress));
     45     }
     46 
     47     virtual bool canBlendWith(const TransformOperation& other) const
     48     {
     49         return isSameType(other);
     50     }
     51 
     52 private:
     53     virtual OperationType type() const OVERRIDE { return Interpolated; }
     54 
     55     virtual bool operator==(const TransformOperation&) const OVERRIDE;
     56     virtual void apply(TransformationMatrix&, const FloatSize& borderBoxSize) const OVERRIDE;
     57 
     58     virtual PassRefPtr<TransformOperation> blend(const TransformOperation* from, double progress, bool blendToIdentity = false) OVERRIDE;
     59 
     60     virtual bool dependsOnBoxSize() const OVERRIDE
     61     {
     62         return from.dependsOnBoxSize() || to.dependsOnBoxSize();
     63     }
     64 
     65     InterpolatedTransformOperation(const TransformOperations& from, const TransformOperations& to, double progress)
     66         : from(from)
     67         , to(to)
     68         , progress(progress)
     69     { }
     70 
     71     const TransformOperations from;
     72     const TransformOperations to;
     73     double progress;
     74 };
     75 
     76 } // namespace blink
     77 
     78 #endif // InterpolatedTransformOperation_h
     79 
     80