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
15 namespace skottie {
16 namespace internal {
17
attachTritoneEffect(const skjson::ArrayValue & jprops,sk_sp<sksg::RenderNode> layer) const18 sk_sp<sksg::RenderNode> EffectBuilder::attachTritoneEffect(const skjson::ArrayValue& jprops,
19 sk_sp<sksg::RenderNode> layer) const {
20 enum : size_t {
21 kHiColor_Index = 0,
22 kMiColor_Index = 1,
23 kLoColor_Index = 2,
24 kBlendAmount_Index = 3,
25
26 kMax_Index = kBlendAmount_Index,
27 };
28
29 if (jprops.size() <= kMax_Index) {
30 return nullptr;
31 }
32
33 const skjson::ObjectValue* hicolor_prop = jprops[ kHiColor_Index];
34 const skjson::ObjectValue* micolor_prop = jprops[ kMiColor_Index];
35 const skjson::ObjectValue* locolor_prop = jprops[ kLoColor_Index];
36 const skjson::ObjectValue* blend_prop = jprops[kBlendAmount_Index];
37
38 if (!hicolor_prop || !micolor_prop || !locolor_prop || !blend_prop) {
39 return nullptr;
40 }
41
42 auto tritone_node =
43 sksg::GradientColorFilter::Make(std::move(layer), {
44 fBuilder->attachColor(*locolor_prop, "v"),
45 fBuilder->attachColor(*micolor_prop, "v"),
46 fBuilder->attachColor(*hicolor_prop, "v") });
47 if (!tritone_node) {
48 return nullptr;
49 }
50
51 fBuilder->bindProperty<ScalarValue>((*blend_prop)["v"],
52 [tritone_node](const ScalarValue& w) {
53 tritone_node->setWeight((100 - w) / 100); // 100-based, inverted (!?).
54 });
55
56 return tritone_node;
57 }
58
59 } // namespace internal
60 } // namespace skottie
61