third_party/WebKit/public/platform/WebTransformOperations.h

   1 /*
   2  * Copyright (C) 2012 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
   6  * are met:
   7  * 1.  Redistributions of source code must retain the above copyright
   8  *     notice, this list of conditions and the following disclaimer.
   9  * 2.  Redistributions in binary form must reproduce the above copyright
  10  *     notice, this list of conditions and the following disclaimer in the
  11  *     documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  15  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  16  * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  17  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  18  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  19  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  20  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  22  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  23  */
  24
  25 #ifndef WebTransformOperations_h
  26 #define WebTransformOperations_h
  27
  28 class SkMatrix44;
  29
  30 #define WEB_TRANSFORM_OPERATIONS_IS_VIRTUAL 1
  31
  32 namespace blink {
  33
  34 class WebTransformOperations {
  35 public:
  36     virtual ~WebTransformOperations() { }
  37
  38     // Returns true if these operations can be blended. It will only return
  39     // false if we must resort to matrix interpolation, and matrix interpolation
  40     // fails (this can happen if either matrix cannot be decomposed).
  41     virtual bool canBlendWith(const WebTransformOperations& other) const = 0;
  42
  43     virtual void appendTranslate(double x, double y, double z) = 0;
  44     virtual void appendRotate(double x, double y, double z, double degrees) = 0;
  45     virtual void appendScale(double x, double y, double z) = 0;
  46     virtual void appendSkew(double x, double y) = 0;
  47     virtual void appendPerspective(double depth) = 0;
  48     virtual void appendMatrix(const SkMatrix44&) = 0;
  49     virtual void appendIdentity() = 0;
  50
  51     virtual bool isIdentity() const = 0;
  52 };
  53
  54 } // namespace blink
  55
  56 #endif // WebTransformOperations_h
  57