Home | History | Annotate | Download | only in custom 
      1 /*
      2  * Copyright (C) 2012 Adobe Systems Incorporated. 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
      6  * are met:
      7  *
      8  * 1. Redistributions of source code must retain the above
      9  *    copyright notice, this list of conditions and the following
     10  *    disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above
     12  *    copyright notice, this list of conditions and the following
     13  *    disclaimer in the documentation and/or other materials
     14  *    provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AS IS AND ANY
     17  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
     20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
     21  * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     22  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     23  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
     25  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
     26  * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     27  * SUCH DAMAGE.
     28  */
     29 
     30 #ifndef CustomFilterTransformParameter_h
     31 #define CustomFilterTransformParameter_h
     32 
     33 #include "core/platform/graphics/FloatSize.h"
     34 #include "core/platform/graphics/filters/custom/CustomFilterParameter.h"
     35 #include "core/platform/graphics/transforms/TransformOperations.h"
     36 
     37 namespace WebCore {
     38 
     39 class FloatRect;
     40 class TransformationMatrix;
     41 
     42 class CustomFilterTransformParameter : public CustomFilterParameter {
     43 public:
     44     static PassRefPtr<CustomFilterTransformParameter> create(const String& name)
     45     {
     46         return adoptRef(new CustomFilterTransformParameter(name));
     47     }
     48 
     49     virtual PassRefPtr<CustomFilterParameter> blend(const CustomFilterParameter* fromParameter, double progress)
     50     {
     51         if (!fromParameter || !isSameType(*fromParameter))
     52             return this;
     53 
     54         const CustomFilterTransformParameter* fromTransformParameter = static_cast<const CustomFilterTransformParameter*>(fromParameter);
     55         const TransformOperations& from = fromTransformParameter->operations();
     56         const TransformOperations& to = operations();
     57         if (from == to)
     58             return this;
     59 
     60         RefPtr<CustomFilterTransformParameter> result = CustomFilterTransformParameter::create(name());
     61         if (from.size() && to.size())
     62             result->setOperations(to.blend(from, progress));
     63         else
     64             result->setOperations(progress > 0.5 ? to : from);
     65         return result;
     66     }
     67 
     68     virtual bool operator==(const CustomFilterParameter& o) const
     69     {
     70         if (!isSameType(o))
     71             return false;
     72         const CustomFilterTransformParameter* other = static_cast<const CustomFilterTransformParameter*>(&o);
     73         return m_operations == other->m_operations;
     74     }
     75 
     76     void applyTransform(TransformationMatrix& transform, const FloatSize& boxSize) const
     77     {
     78         for (unsigned i = 0, size = m_operations.size(); i < size; ++i)
     79             m_operations.at(i)->apply(transform, boxSize);
     80     }
     81 
     82     const TransformOperations& operations() const { return m_operations; }
     83     void setOperations(const TransformOperations& value) { m_operations = value; }
     84 
     85 private:
     86     CustomFilterTransformParameter(const String& name)
     87         : CustomFilterParameter(TRANSFORM, name)
     88     {
     89     }
     90     virtual ~CustomFilterTransformParameter()
     91     {
     92     }
     93 
     94     TransformOperations m_operations;
     95 };
     96 
     97 } // namespace WebCore
     98 
     99 
    100 #endif // CustomFilterTransformParameter_h
    101