third_party/WebKit/Source/platform/transforms/InterpolatedTransformOperation.h

   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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   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     OperationType type() const override { return Interpolated; }
  54
  55     bool operator==(const TransformOperation&) const override;
  56     void apply(TransformationMatrix&, const FloatSize& borderBoxSize) const override;
  57
  58     PassRefPtr<TransformOperation> blend(const TransformOperation* from, double progress, bool blendToIdentity = false) override;
  59     PassRefPtr<TransformOperation> zoom(double factor) final { return create(from.zoom(factor), to.zoom(factor), progress); }
  60
  61     bool dependsOnBoxSize() const override
  62     {
  63         return from.dependsOnBoxSize() || to.dependsOnBoxSize();
  64     }
  65
  66     InterpolatedTransformOperation(const TransformOperations& from, const TransformOperations& to, double progress)
  67         : from(from)
  68         , to(to)
  69         , progress(progress)
  70     { }
  71
  72     const TransformOperations from;
  73     const TransformOperations to;
  74     double progress;
  75 };
  76
  77 } // namespace blink
  78
  79 #endif // InterpolatedTransformOperation_h
  80