cc/animation/transform_operation.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CC_ANIMATION_TRANSFORM_OPERATION_H_
   6 #define CC_ANIMATION_TRANSFORM_OPERATION_H_
   7
   8 #include "ui/gfx/transform.h"
   9
  10 namespace cc {
  11
  12 struct TransformOperation {
  13   enum Type {
  14     TransformOperationTranslate,
  15     TransformOperationRotate,
  16     TransformOperationScale,
  17     TransformOperationSkew,
  18     TransformOperationPerspective,
  19     TransformOperationMatrix,
  20     TransformOperationIdentity
  21   };
  22
  23   TransformOperation()
  24       : type(TransformOperationIdentity) {
  25   }
  26
  27   Type type;
  28   gfx::Transform matrix;
  29
  30   union {
  31     double perspective_depth;
  32
  33     struct {
  34       double x, y;
  35     } skew;
  36
  37     struct {
  38       double x, y, z;
  39     } scale;
  40
  41     struct {
  42       double x, y, z;
  43     } translate;
  44
  45     struct {
  46       struct {
  47         double x, y, z;
  48       } axis;
  49
  50       double angle;
  51     } rotate;
  52   };
  53
  54   bool IsIdentity() const;
  55   static bool BlendTransformOperations(const TransformOperation* from,
  56                                        const TransformOperation* to,
  57                                        double progress,
  58                                        gfx::Transform* result);
  59 };
  60
  61 }  // namespace cc
  62
  63 #endif  // CC_ANIMATION_TRANSFORM_OPERATION_H_