1 /* 2 * Copyright 2020 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef SkottieCamera_DEFINED 9 #define SkottieCamera_DEFINED 10 11 #include "modules/skottie/src/Transform.h" 12 13 namespace skottie { 14 namespace internal { 15 16 class CameraAdaper final : public TransformAdapter3D { 17 public: 18 CameraAdaper(const skjson::ObjectValue& jlayer, 19 const skjson::ObjectValue& jtransform, 20 const AnimationBuilder& abuilder, 21 const SkSize& viewport_size); 22 ~CameraAdaper() override; 23 24 // Used in the absence of an explicit camera layer. 25 static sk_sp<sksg::Transform> DefaultCameraTransform(const SkSize& viewport_size); 26 27 SkM44 totalMatrix() const override; 28 29 private: 30 enum class CameraType { 31 kOneNode, // implicitly facing forward (decreasing z), does not auto-orient 32 kTwoNode, // explicitly facing a POI (the anchor point), auto-orients 33 }; 34 35 SkV3 poi(const SkV3& pos) const; 36 37 const SkSize fViewportSize; 38 const CameraType fType; 39 40 ScalarValue fZoom = 0; 41 42 using INHERITED = TransformAdapter3D; 43 }; 44 45 } // namespace internal 46 } // namespace skottie 47 48 #endif // SkottieCamera_DEFINED 49