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 TransformOperationTransformOperation27 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_ 75