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 SkottieTextAnimator_DEFINED
9#define SkottieTextAnimator_DEFINED
10
11#include "include/core/SkM44.h"
12#include "include/core/SkRefCnt.h"
13#include "modules/skottie/src/SkottiePriv.h"
14#include "modules/skottie/src/SkottieValue.h"
15#include "modules/sksg/include/SkSGScene.h"
16
17#include <memory>
18#include <vector>
19
20namespace skottie {
21namespace internal {
22
23class AnimatablePropertyContainer;
24class AnimationBuilder;
25class RangeSelector;
26
27class TextAnimator final : public SkNVRefCnt<TextAnimator> {
28public:
29 static sk_sp<TextAnimator> Make(const skjson::ObjectValue*,
30 const AnimationBuilder*,
31 AnimatablePropertyContainer* acontainer);
32
33 // Direct mapping of AE properties.
34 struct AnimatedProps {
35 VectorValue position,
36 scale = { 100, 100, 100 },
37 fill_color,
38 stroke_color;
39 // unlike pos/scale which are animated vectors, rotation is separated in each dimension.
40 SkV3 rotation = { 0, 0, 0 };
41 Vec2Value blur = { 0, 0 };
42 ScalarValue opacity = 100,
43 tracking = 0;
44 };
45
46 struct ResolvedProps {
47 SkV3 position = { 0, 0, 0 },
48 scale = { 1, 1, 1 },
49 rotation = { 0, 0, 0 };
50 float opacity = 1,
51 tracking = 0;
52 SkColor fill_color = SK_ColorTRANSPARENT,
53 stroke_color = SK_ColorTRANSPARENT;
54 SkV2 blur = { 0, 0 };
55 };
56
57 struct AnimatedPropsModulator {
58 ResolvedProps props; // accumulates properties across *all* animators
59 float coverage; // accumulates range selector coverage for a given animator
60 };
61 using ModulatorBuffer = std::vector<AnimatedPropsModulator>;
62
63 // Domain maps describe how a given index domain (words, lines, etc) relates
64 // to the full fragment index range.
65 //
66 // Each domain[i] represents a [domain[i].fOffset.. domain[i].fOffset+domain[i].fCount-1]
67 // fragment subset.
68 struct DomainSpan {
69 size_t fOffset,
70 fCount;
71 float fAdvance, // cumulative advance for all fragments in span
72 fAscent; // max ascent for all fragments in span
73 };
74 using DomainMap = std::vector<DomainSpan>;
75
76 struct DomainMaps {
77 DomainMap fNonWhitespaceMap,
78 fWordsMap,
79 fLinesMap;
80 };
81
82 void modulateProps(const DomainMaps&, ModulatorBuffer&) const;
83
84 bool hasBlur() const { return fHasBlur; }
85
86 bool requiresAnchorPoint() const { return fRequiresAnchorPoint; }
87
88private:
89 TextAnimator(std::vector<sk_sp<RangeSelector>>&&,
90 const skjson::ObjectValue&,
91 const AnimationBuilder*,
92 AnimatablePropertyContainer*);
93
94 ResolvedProps modulateProps(const ResolvedProps&, float amount) const;
95
96 const std::vector<sk_sp<RangeSelector>> fSelectors;
97
98 AnimatedProps fTextProps;
99 bool fHasFillColor : 1,
100 fHasStrokeColor : 1,
101 fHasBlur : 1,
102 fRequiresAnchorPoint : 1; // animator sensitive to transform origin?
103};
104
105} // namespace internal
106} // namespace skottie
107
108#endif // SkottieTextAnimator_DEFINED
109