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      1 /*
      2  * Copyright (C) 2013 Google Inc. All rights reserved.
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      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
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     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
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     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
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     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #include "config.h"
     32 #include "core/platform/graphics/transforms/InterpolatedTransformOperation.h"
     33 
     34 #include "core/platform/graphics/transforms/IdentityTransformOperation.h"
     35 
     36 namespace WebCore {
     37 
     38 bool InterpolatedTransformOperation::operator==(const TransformOperation& o) const
     39 {
     40     if (!isSameType(o))
     41         return false;
     42     const InterpolatedTransformOperation* t = static_cast<const InterpolatedTransformOperation*>(&o);
     43     return progress == t->progress && from == t->from && to == t->to;
     44 }
     45 
     46 bool InterpolatedTransformOperation::apply(TransformationMatrix& transform, const FloatSize& borderBoxSize) const
     47 {
     48     TransformationMatrix fromTransform;
     49     TransformationMatrix toTransform;
     50     from.apply(borderBoxSize, fromTransform);
     51     to.apply(borderBoxSize, toTransform);
     52 
     53     toTransform.blend(fromTransform, progress);
     54     transform.multiply(toTransform);
     55     return true;
     56 }
     57 
     58 PassRefPtr<TransformOperation> InterpolatedTransformOperation::blend(const TransformOperation* from, double progress, bool blendToIdentity)
     59 {
     60     if (from && !from->isSameType(*this))
     61         return this;
     62 
     63     TransformOperations thisOperations;
     64     thisOperations.operations().append(this);
     65     TransformOperations fromOperations;
     66     if (blendToIdentity)
     67         fromOperations.operations().append(IdentityTransformOperation::create());
     68     else
     69         fromOperations.operations().append(const_cast<TransformOperation*>(from));
     70     return InterpolatedTransformOperation::create(thisOperations, fromOperations, progress);
     71 }
     72 
     73 } // namespace WebCore
     74 
     75