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     TRANSFORM_OPERATION_TRANSLATE,
  19     TRANSFORM_OPERATION_ROTATE,
  20     TRANSFORM_OPERATION_SCALE,
  21     TRANSFORM_OPERATION_SKEW,
  22     TRANSFORM_OPERATION_PERSPECTIVE,
  23     TRANSFORM_OPERATION_MATRIX,
  24     TRANSFORM_OPERATION_IDENTITY
  25   };
  26
  27   TransformOperation() : type(TRANSFORM_OPERATION_IDENTITY) {}
  28
  29   Type type;
  30   gfx::Transform matrix;
  31
  32   union {
  33     SkMScalar perspective_depth;
  34
  35     struct {
  36       SkMScalar x, y;
  37     } skew;
  38
  39     struct {
  40       SkMScalar x, y, z;
  41     } scale;
  42
  43     struct {
  44       SkMScalar x, y, z;
  45     } translate;
  46
  47     struct {
  48       struct {
  49         SkMScalar x, y, z;
  50       } axis;
  51
  52       SkMScalar angle;
  53     } rotate;
  54   };
  55
  56   bool IsIdentity() const;
  57   static bool BlendTransformOperations(const TransformOperation* from,
  58                                        const TransformOperation* to,
  59                                        SkMScalar progress,
  60                                        gfx::Transform* result);
  61
  62   static bool BlendedBoundsForBox(const gfx::BoxF& box,
  63                                   const TransformOperation* from,
  64                                   const TransformOperation* to,
  65                                   SkMScalar min_progress,
  66                                   SkMScalar max_progress,
  67                                   gfx::BoxF* bounds);
  68 };
  69
  70 }  // namespace cc
  71
  72 #endif  // CC_ANIMATION_TRANSFORM_OPERATION_H_