1 | /* |
2 | * Copyright 2019 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 SkottieLayer_DEFINED |
9 | #define SkottieLayer_DEFINED |
10 | |
11 | #include "modules/skottie/src/SkottiePriv.h" |
12 | |
13 | namespace skottie { |
14 | namespace internal { |
15 | |
16 | class CompositionBuilder; |
17 | |
18 | class LayerBuilder final { |
19 | public: |
20 | explicit LayerBuilder(const skjson::ObjectValue& jlayer); |
21 | ~LayerBuilder(); |
22 | |
23 | int index() const { return fIndex; } |
24 | |
25 | bool isCamera() const; |
26 | |
27 | // Attaches the local and ancestor transform chain for the layer "native" type. |
28 | sk_sp<sksg::Transform> buildTransform(const AnimationBuilder&, CompositionBuilder*); |
29 | |
30 | // Attaches the actual layer content and finalizes its render tree. Called once per layer. |
31 | sk_sp<sksg::RenderNode> buildRenderTree(const AnimationBuilder&, CompositionBuilder*, |
32 | const LayerBuilder* prev_layer); |
33 | |
34 | private: |
35 | enum TransformType : uint8_t { |
36 | k2D = 0, |
37 | k3D = 1, |
38 | }; |
39 | |
40 | enum Flags { |
41 | // k2DTransformValid = 0x01, // reserved for cache tracking |
42 | // k3DTransformValie = 0x02, // reserved for cache tracking |
43 | kIs3D = 0x04, // 3D layer ("ddd": 1) or camera layer |
44 | }; |
45 | |
46 | bool is3D() const { return fFlags & Flags::kIs3D; } |
47 | |
48 | bool hasMotionBlur(const CompositionBuilder*) const; |
49 | |
50 | // Attaches (if needed) and caches the transform chain for a given layer, |
51 | // as either a 2D or 3D chain type. |
52 | // Called transitively (and possibly repeatedly) to resolve layer parenting. |
53 | sk_sp<sksg::Transform> getTransform(const AnimationBuilder&, CompositionBuilder*, |
54 | TransformType); |
55 | |
56 | sk_sp<sksg::Transform> getParentTransform(const AnimationBuilder&, CompositionBuilder*, |
57 | TransformType); |
58 | |
59 | sk_sp<sksg::Transform> doAttachTransform(const AnimationBuilder&, CompositionBuilder*, |
60 | TransformType); |
61 | |
62 | const skjson::ObjectValue& fJlayer; |
63 | const int fIndex; |
64 | const int fParentIndex; |
65 | const int fType; |
66 | |
67 | sk_sp<sksg::Transform> fLayerTransform; // this layer's transform node. |
68 | sk_sp<sksg::Transform> fTransformCache[2]; // cached 2D/3D chain for the local node |
69 | sk_sp<sksg::RenderNode> fContentTree; // render tree for layer content, |
70 | // excluding mask/matte and blending |
71 | |
72 | AnimatorScope fLayerScope; // layer-scoped animators |
73 | size_t fTransformAnimatorCount = 0; // transform-related animator count |
74 | uint32_t fFlags = 0; |
75 | }; |
76 | |
77 | } // namespace internal |
78 | } // namespace skottie |
79 | |
80 | #endif // SkottieLayer_DEFINED |
81 | |