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 gfx {
  11 class BoxF;
  12 }
  13
  14 namespace cc {
  15
  16 struct TransformOperation {
  17   enum Type {
  18     TransformOperationTranslate,
  19     TransformOperationRotate,
  20     TransformOperationScale,
  21     TransformOperationSkew,
  22     TransformOperationPerspective,
  23     TransformOperationMatrix,
  24     TransformOperationIdentity
  25   };
  26
  27   TransformOperation()
  28       : type(TransformOperationIdentity) {
  29   }
  30
  31   Type type;
  32   gfx::Transform matrix;
  33
  34   union {
  35     SkMScalar perspective_depth;
  36
  37     struct {
  38       SkMScalar x, y;
  39     } skew;
  40
  41     struct {
  42       SkMScalar x, y, z;
  43     } scale;
  44
  45     struct {
  46       SkMScalar x, y, z;
  47     } translate;
  48
  49     struct {
  50       struct {
  51         SkMScalar x, y, z;
  52       } axis;
  53
  54       SkMScalar angle;
  55     } rotate;
  56   };
  57
  58   bool IsIdentity() const;
  59   static bool BlendTransformOperations(const TransformOperation* from,
  60                                        const TransformOperation* to,
  61                                        SkMScalar progress,
  62                                        gfx::Transform* result);
  63
  64   static bool BlendedBoundsForBox(const gfx::BoxF& box,
  65                                   const TransformOperation* from,
  66                                   const TransformOperation* to,
  67                                   SkMScalar min_progress,
  68                                   SkMScalar max_progress,
  69                                   gfx::BoxF* bounds);
  70 };
  71
  72 }  // namespace cc
  73
  74 #endif  // CC_ANIMATION_TRANSFORM_OPERATION_H_