Source/core/platform/graphics/transforms/InterpolatedTransformOperation.h

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#ifndef InterpolatedTransformOperation_h
#define InterpolatedTransformOperation_h

#include "core/platform/graphics/transforms/TransformOperation.h"
#include "core/platform/graphics/transforms/TransformOperations.h"

namespace WebCore {

// This class is an implementation detail for deferred interpolations.
class InterpolatedTransformOperation : public TransformOperation {
public:
    static PassRefPtr<InterpolatedTransformOperation> create(const TransformOperations& from, const TransformOperations& to, double progress)
    {
        return adoptRef(new InterpolatedTransformOperation(from, to, progress));
    }

private:
    virtual bool isIdentity() const { return false; }

    virtual OperationType getOperationType() const { return Interpolated; }
    virtual bool isSameType(const TransformOperation& o) const { return o.getOperationType() == Interpolated; }

    virtual bool operator==(const TransformOperation&) const;
    virtual bool apply(TransformationMatrix&, const FloatSize& borderBoxSize) const;

    virtual PassRefPtr<TransformOperation> blend(const TransformOperation* from, double progress, bool blendToIdentity = false);

    InterpolatedTransformOperation(const TransformOperations& from, const TransformOperations& to, double progress)
        : from(from)
        , to(to)
        , progress(progress)
    { }

    const TransformOperations from;
    const TransformOperations to;
    double progress;
};

} // namespace WebCore

#endif // InterpolatedTransformOperation_h