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 #include "modules/skottie/src/effects/Effects.h"
9
10 #include "modules/skottie/src/SkottieAdapter.h"
11 #include "modules/skottie/src/SkottieJson.h"
12 #include "modules/sksg/include/SkSGOpacityEffect.h"
13 #include "modules/sksg/include/SkSGTransform.h"
14
15 namespace skottie {
16 namespace internal {
17
18 namespace {
19
20 // Transform effects can operate in either uniform or anisotropic mode, with each
21 // component (including mode) animated separately.
22 class ScaleAdapter final : public SkNVRefCnt<ScaleAdapter> {
23 public:
ScaleAdapter(sk_sp<TransformAdapter2D> tadapter)24 explicit ScaleAdapter(sk_sp<TransformAdapter2D> tadapter)
25 : fTransformAdapter(std::move(tadapter)) {}
26
27 ADAPTER_PROPERTY(IsUniform , bool , false)
28 ADAPTER_PROPERTY(ScaleWidth , SkScalar, 100)
29 ADAPTER_PROPERTY(ScaleHeight, SkScalar, 100)
30
31 private:
apply()32 void apply() {
33 // In uniform mode, the scale is based solely in ScaleHeight.
34 const auto scale = SkVector::Make(fIsUniform ? fScaleHeight : fScaleWidth,
35 fScaleHeight);
36 fTransformAdapter->setScale(scale);
37 }
38
39 const sk_sp<TransformAdapter2D> fTransformAdapter;
40 };
41
42 } // anonymous ns
43
attachTransformEffect(const skjson::ArrayValue & jprops,sk_sp<sksg::RenderNode> layer) const44 sk_sp<sksg::RenderNode> EffectBuilder::attachTransformEffect(const skjson::ArrayValue& jprops,
45 sk_sp<sksg::RenderNode> layer) const {
46 enum : size_t {
47 kAnchorPoint_Index = 0,
48 kPosition_Index = 1,
49 kUniformScale_Index = 2,
50 kScaleHeight_Index = 3,
51 kScaleWidth_Index = 4,
52 kSkew_Index = 5,
53 kSkewAxis_Index = 6,
54 kRotation_Index = 7,
55 kOpacity_Index = 8,
56 // kUseCompShutterAngle_Index = 9,
57 // kShutterAngle_Index = 10,
58 // kSampling_Index = 11,
59 };
60
61 auto matrix = sksg::Matrix<SkMatrix>::Make(SkMatrix::I());
62 auto t_adapter = sk_make_sp<TransformAdapter2D>(matrix);
63 auto s_adapter = sk_make_sp<ScaleAdapter>(t_adapter);
64
65 fBuilder->bindProperty<VectorValue>(GetPropValue(jprops, kAnchorPoint_Index),
66 [t_adapter](const VectorValue& ap) {
67 t_adapter->setAnchorPoint(ValueTraits<VectorValue>::As<SkPoint>(ap));
68 });
69 fBuilder->bindProperty<VectorValue>(GetPropValue(jprops, kPosition_Index),
70 [t_adapter](const VectorValue& p) {
71 t_adapter->setPosition(ValueTraits<VectorValue>::As<SkPoint>(p));
72 });
73 fBuilder->bindProperty<ScalarValue>(GetPropValue(jprops, kRotation_Index),
74 [t_adapter](const ScalarValue& r) {
75 t_adapter->setRotation(r);
76 });
77 fBuilder->bindProperty<ScalarValue>(GetPropValue(jprops, kSkew_Index),
78 [t_adapter](const ScalarValue& s) {
79 t_adapter->setSkew(s);
80 });
81 fBuilder->bindProperty<ScalarValue>(GetPropValue(jprops, kSkewAxis_Index),
82 [t_adapter](const ScalarValue& sa) {
83 t_adapter->setSkewAxis(sa);
84 });
85
86 fBuilder->bindProperty<ScalarValue>(GetPropValue(jprops, kUniformScale_Index),
87 [s_adapter](const ScalarValue& u) {
88 s_adapter->setIsUniform(SkScalarRoundToInt(u));
89 });
90 fBuilder->bindProperty<ScalarValue>(GetPropValue(jprops, kScaleHeight_Index),
91 [s_adapter](const ScalarValue& sh) {
92 s_adapter->setScaleHeight(sh);
93 });
94 fBuilder->bindProperty<ScalarValue>(GetPropValue(jprops, kScaleWidth_Index),
95 [s_adapter](const ScalarValue& sw) {
96 s_adapter->setScaleWidth(sw);
97 });
98
99 auto opacity_node = sksg::OpacityEffect::Make(sksg::TransformEffect::Make(std::move(layer),
100 std::move(matrix)));
101
102 fBuilder->bindProperty<ScalarValue>(GetPropValue(jprops, kOpacity_Index),
103 [opacity_node](const ScalarValue& o) {
104 opacity_node->setOpacity(o * 0.01f);
105 });
106
107 return opacity_node;
108 }
109
110 } // namespace internal
111 } // namespace skottie
112