1 | // Copyright 2013 The Flutter Authors. All rights reserved. |
2 | // Use of this source code is governed by a BSD-style license that can be |
3 | // found in the LICENSE file. |
4 | |
5 | #include "flutter/lib/ui/painting/path_measure.h" |
6 | |
7 | #define _USE_MATH_DEFINES |
8 | #include <math.h> |
9 | |
10 | #include "flutter/lib/ui/painting/matrix.h" |
11 | #include "flutter/lib/ui/ui_dart_state.h" |
12 | #include "third_party/tonic/converter/dart_converter.h" |
13 | #include "third_party/tonic/dart_args.h" |
14 | #include "third_party/tonic/dart_binding_macros.h" |
15 | #include "third_party/tonic/dart_library_natives.h" |
16 | |
17 | using tonic::ToDart; |
18 | |
19 | namespace flutter { |
20 | |
21 | typedef CanvasPathMeasure PathMeasure; |
22 | |
23 | static void PathMeasure_constructor(Dart_NativeArguments args) { |
24 | UIDartState::ThrowIfUIOperationsProhibited(); |
25 | DartCallConstructor(&CanvasPathMeasure::Create, args); |
26 | } |
27 | |
28 | IMPLEMENT_WRAPPERTYPEINFO(ui, PathMeasure); |
29 | |
30 | #define FOR_EACH_BINDING(V) \ |
31 | V(PathMeasure, setPath) \ |
32 | V(PathMeasure, getLength) \ |
33 | V(PathMeasure, getPosTan) \ |
34 | V(PathMeasure, getSegment) \ |
35 | V(PathMeasure, isClosed) \ |
36 | V(PathMeasure, nextContour) |
37 | |
38 | FOR_EACH_BINDING(DART_NATIVE_CALLBACK) |
39 | |
40 | void CanvasPathMeasure::RegisterNatives(tonic::DartLibraryNatives* natives) { |
41 | natives->Register( |
42 | {{"PathMeasure_constructor" , PathMeasure_constructor, 3, true}, |
43 | FOR_EACH_BINDING(DART_REGISTER_NATIVE)}); |
44 | } |
45 | |
46 | fml::RefPtr<CanvasPathMeasure> CanvasPathMeasure::Create(const CanvasPath* path, |
47 | bool forceClosed) { |
48 | fml::RefPtr<CanvasPathMeasure> pathMeasure = |
49 | fml::MakeRefCounted<CanvasPathMeasure>(); |
50 | if (path) { |
51 | const SkPath skPath = path->path(); |
52 | SkScalar resScale = 1; |
53 | pathMeasure->path_measure_ = |
54 | std::make_unique<SkContourMeasureIter>(skPath, forceClosed, resScale); |
55 | } else { |
56 | pathMeasure->path_measure_ = std::make_unique<SkContourMeasureIter>(); |
57 | } |
58 | return pathMeasure; |
59 | } |
60 | |
61 | CanvasPathMeasure::CanvasPathMeasure() {} |
62 | |
63 | CanvasPathMeasure::~CanvasPathMeasure() {} |
64 | |
65 | void CanvasPathMeasure::setPath(const CanvasPath* path, bool isClosed) { |
66 | const SkPath& skPath = path->path(); |
67 | path_measure_->reset(skPath, isClosed); |
68 | } |
69 | |
70 | float CanvasPathMeasure::getLength(int contour_index) { |
71 | if (static_cast<std::vector<sk_sp<SkContourMeasure>>::size_type>( |
72 | contour_index) < measures_.size()) { |
73 | return measures_[contour_index]->length(); |
74 | } |
75 | return -1; |
76 | } |
77 | |
78 | tonic::Float32List CanvasPathMeasure::getPosTan(int contour_index, |
79 | float distance) { |
80 | tonic::Float32List posTan(Dart_NewTypedData(Dart_TypedData_kFloat32, 5)); |
81 | posTan[0] = 0; // dart code will check for this for failure |
82 | if (static_cast<std::vector<sk_sp<SkContourMeasure>>::size_type>( |
83 | contour_index) >= measures_.size()) { |
84 | return posTan; |
85 | } |
86 | |
87 | SkPoint pos; |
88 | SkVector tan; |
89 | bool success = measures_[contour_index]->getPosTan(distance, &pos, &tan); |
90 | |
91 | if (success) { |
92 | posTan[0] = 1; // dart code will check for this for success |
93 | posTan[1] = pos.x(); |
94 | posTan[2] = pos.y(); |
95 | posTan[3] = tan.x(); |
96 | posTan[4] = tan.y(); |
97 | } |
98 | |
99 | return posTan; |
100 | } |
101 | |
102 | void CanvasPathMeasure::getSegment(Dart_Handle path_handle, |
103 | int contour_index, |
104 | float start_d, |
105 | float stop_d, |
106 | bool start_with_move_to) { |
107 | if (static_cast<std::vector<sk_sp<SkContourMeasure>>::size_type>( |
108 | contour_index) >= measures_.size()) { |
109 | CanvasPath::Create(path_handle); |
110 | } |
111 | SkPath dst; |
112 | bool success = measures_[contour_index]->getSegment(start_d, stop_d, &dst, |
113 | start_with_move_to); |
114 | if (!success) { |
115 | CanvasPath::Create(path_handle); |
116 | } else { |
117 | CanvasPath::CreateFrom(path_handle, dst); |
118 | } |
119 | } |
120 | |
121 | bool CanvasPathMeasure::isClosed(int contour_index) { |
122 | if (static_cast<std::vector<sk_sp<SkContourMeasure>>::size_type>( |
123 | contour_index) < measures_.size()) { |
124 | return measures_[contour_index]->isClosed(); |
125 | } |
126 | return false; |
127 | } |
128 | |
129 | bool CanvasPathMeasure::nextContour() { |
130 | auto measure = path_measure_->next(); |
131 | if (measure) { |
132 | measures_.push_back(std::move(measure)); |
133 | return true; |
134 | } |
135 | return false; |
136 | } |
137 | |
138 | } // namespace flutter |
139 | |