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 "include/core/SkM44.h" 12 #include "include/core/SkRefCnt.h" 13 #include "include/core/SkSize.h" 14 #include "modules/skottie/src/SkottieValue.h" 15 #include "modules/skottie/src/Transform.h" 16 17 namespace skjson { 18 class ObjectValue; 19 } 20 namespace sksg { 21 class Transform; 22 } 23 24 namespace skottie { 25 namespace internal { 26 class AnimationBuilder; 27 28 class CameraAdaper final : public TransformAdapter3D { 29 public: 30 CameraAdaper(const skjson::ObjectValue& jlayer, 31 const skjson::ObjectValue& jtransform, 32 const AnimationBuilder& abuilder, 33 const SkSize& viewport_size); 34 ~CameraAdaper() override; 35 36 // Used in the absence of an explicit camera layer. 37 static sk_sp<sksg::Transform> DefaultCameraTransform(const SkSize& viewport_size); 38 39 SkM44 totalMatrix() const override; 40 41 private: 42 enum class CameraType { 43 kOneNode, // implicitly facing forward (decreasing z), does not auto-orient 44 kTwoNode, // explicitly facing a POI (the anchor point), auto-orients 45 }; 46 47 SkV3 poi(const SkV3& pos) const; 48 49 const SkSize fViewportSize; 50 const CameraType fType; 51 52 ScalarValue fZoom = 0; 53 54 using INHERITED = TransformAdapter3D; 55 }; 56 57 } // namespace internal 58 } // namespace skottie 59 60 #endif // SkottieCamera_DEFINED 61