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/SkottieValue.h"
11#include "modules/sksg/include/SkSGColorFilter.h"
12#include "modules/sksg/include/SkSGPaint.h"
13#include "src/utils/SkJSON.h"
14
15namespace skottie {
16namespace internal {
17
18namespace {
19
20class TintAdapter final : public AnimatablePropertyContainer {
21public:
22 static sk_sp<TintAdapter> Make(const skjson::ArrayValue& jprops,
23 sk_sp<sksg::RenderNode> layer,
24 const AnimationBuilder& abuilder) {
25 return sk_sp<TintAdapter>(new TintAdapter(jprops, std::move(layer), abuilder));
26 }
27
28 const auto& node() const { return fFilterNode; }
29
30private:
31 TintAdapter(const skjson::ArrayValue& jprops,
32 sk_sp<sksg::RenderNode> layer,
33 const AnimationBuilder& abuilder)
34 : fColorNode0(sksg::Color::Make(SK_ColorBLACK))
35 , fColorNode1(sksg::Color::Make(SK_ColorBLACK))
36 , fFilterNode(sksg::GradientColorFilter::Make(std::move(layer), fColorNode0, fColorNode1)) {
37
38 enum : size_t {
39 kMapBlackTo_Index = 0,
40 kMapWhiteTo_Index = 1,
41 kAmount_Index = 2,
42 // kOpacity_Index = 3, // currently unused (not exported)
43
44 kMax_Index = kAmount_Index,
45 };
46
47 EffectBinder(jprops, abuilder, this)
48 .bind(kMapBlackTo_Index, fMapBlackTo)
49 .bind(kMapWhiteTo_Index, fMapWhiteTo)
50 .bind( kAmount_Index, fAmount );
51 }
52
53 void onSync() override {
54 fColorNode0->setColor(fMapBlackTo);
55 fColorNode1->setColor(fMapWhiteTo);
56
57 fFilterNode->setWeight(fAmount / 100); // 100-based
58 }
59
60 const sk_sp<sksg::Color> fColorNode0,
61 fColorNode1;
62 const sk_sp<sksg::GradientColorFilter> fFilterNode;
63
64 VectorValue fMapBlackTo,
65 fMapWhiteTo;
66 ScalarValue fAmount = 0;
67};
68
69} // namespace
70
71sk_sp<sksg::RenderNode> EffectBuilder::attachTintEffect(const skjson::ArrayValue& jprops,
72 sk_sp<sksg::RenderNode> layer) const {
73 return fBuilder->attachDiscardableAdapter<TintAdapter>(jprops, std::move(layer), *fBuilder);
74}
75
76} // namespace internal
77} // namespace skottie
78