/src/skia/src/effects/Sk2DPathEffect.cpp
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1 | | /* |
2 | | * Copyright 2006 The Android Open Source Project |
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 "include/core/SkPath.h" |
9 | | #include "include/core/SkRegion.h" |
10 | | #include "include/core/SkStrokeRec.h" |
11 | | #include "include/effects/Sk2DPathEffect.h" |
12 | | #include "src/core/SkPathEffectBase.h" |
13 | | #include "src/core/SkReadBuffer.h" |
14 | | #include "src/core/SkWriteBuffer.h" |
15 | | |
16 | | class Sk2DPathEffect : public SkPathEffectBase { |
17 | | public: |
18 | 20.9k | Sk2DPathEffect(const SkMatrix& mat) : fMatrix(mat) { |
19 | | // Calling invert will set the type mask on both matrices, making them thread safe. |
20 | 20.9k | fMatrixIsInvertible = fMatrix.invert(&fInverse); |
21 | 20.9k | } |
22 | | |
23 | | protected: |
24 | | /** New virtual, to be overridden by subclasses. |
25 | | This is called once from filterPath, and provides the |
26 | | uv parameter bounds for the path. Subsequent calls to |
27 | | next() will receive u and v values within these bounds, |
28 | | and then a call to end() will signal the end of processing. |
29 | | */ |
30 | 10.7k | virtual void begin(const SkIRect& uvBounds, SkPath* dst) const {} |
31 | 0 | virtual void next(const SkPoint& loc, int u, int v, SkPath* dst) const {} |
32 | 10.7k | virtual void end(SkPath* dst) const {} |
33 | | |
34 | | /** Low-level virtual called per span of locations in the u-direction. |
35 | | The default implementation calls next() repeatedly with each |
36 | | location. |
37 | | */ |
38 | 2.91M | virtual void nextSpan(int x, int y, int ucount, SkPath* path) const { |
39 | 2.91M | if (!fMatrixIsInvertible) { |
40 | 0 | return; |
41 | 0 | } |
42 | | #if defined(SK_BUILD_FOR_FUZZER) |
43 | | if (count > 100) { |
44 | | return; |
45 | | } |
46 | | #endif |
47 | | |
48 | 2.91M | const SkMatrix& mat = this->getMatrix(); |
49 | 2.91M | SkPoint src, dst; |
50 | | |
51 | 2.91M | src.set(SkIntToScalar(x) + SK_ScalarHalf, SkIntToScalar(y) + SK_ScalarHalf); |
52 | 90.9M | do { |
53 | 90.9M | mat.mapPoints(&dst, &src, 1); |
54 | 90.9M | this->next(dst, x++, y, path); |
55 | 90.9M | src.fX += SK_Scalar1; |
56 | 90.9M | } while (--ucount > 0); |
57 | 2.91M | } |
58 | | |
59 | 7.20M | const SkMatrix& getMatrix() const { return fMatrix; } |
60 | | |
61 | 0 | void flatten(SkWriteBuffer& buffer) const override { |
62 | 0 | this->INHERITED::flatten(buffer); |
63 | 0 | buffer.writeMatrix(fMatrix); |
64 | 0 | } |
65 | | |
66 | | bool onFilterPath(SkPath* dst, const SkPath& src, SkStrokeRec* rec, |
67 | 27.5k | const SkRect* cullRect, const SkMatrix&) const override { |
68 | 27.5k | if (!fMatrixIsInvertible) { |
69 | 11.7k | return false; |
70 | 11.7k | } |
71 | | |
72 | 15.8k | SkPath tmp; |
73 | 15.8k | SkIRect ir; |
74 | | |
75 | 15.8k | src.transform(fInverse, &tmp); |
76 | 15.8k | tmp.getBounds().round(&ir); |
77 | 15.8k | if (!ir.isEmpty()) { |
78 | 10.7k | this->begin(ir, dst); |
79 | | |
80 | 10.7k | SkRegion rgn; |
81 | 10.7k | rgn.setPath(tmp, SkRegion(ir)); |
82 | 10.7k | SkRegion::Iterator iter(rgn); |
83 | 8.46M | for (; !iter.done(); iter.next()) { |
84 | 8.45M | const SkIRect& rect = iter.rect(); |
85 | 19.4M | for (int y = rect.fTop; y < rect.fBottom; ++y) { |
86 | 11.0M | this->nextSpan(rect.fLeft, y, rect.width(), dst); |
87 | 11.0M | } |
88 | 8.45M | } |
89 | | |
90 | 10.7k | this->end(dst); |
91 | 10.7k | } |
92 | 15.8k | return true; |
93 | 15.8k | } |
94 | | |
95 | | private: |
96 | | SkMatrix fMatrix, fInverse; |
97 | | bool fMatrixIsInvertible; |
98 | | |
99 | | // For simplicity, assume fast bounds cannot be computed |
100 | 1.13k | bool computeFastBounds(SkRect*) const override { return false; } |
101 | | |
102 | | friend class Sk2DPathEffectBlitter; |
103 | | using INHERITED = SkPathEffect; |
104 | | }; |
105 | | |
106 | | /////////////////////////////////////////////////////////////////////////////// |
107 | | |
108 | | class SkLine2DPathEffectImpl : public Sk2DPathEffect { |
109 | | public: |
110 | | SkLine2DPathEffectImpl(SkScalar width, const SkMatrix& matrix) |
111 | | : Sk2DPathEffect(matrix) |
112 | | , fWidth(width) |
113 | 8.60k | { |
114 | 8.60k | SkASSERT(width >= 0); |
115 | 8.60k | } |
116 | | |
117 | | bool onFilterPath(SkPath* dst, const SkPath& src, SkStrokeRec* rec, |
118 | 10.4k | const SkRect* cullRect, const SkMatrix& ctm) const override { |
119 | 10.4k | if (this->INHERITED::onFilterPath(dst, src, rec, cullRect, ctm)) { |
120 | 8.16k | rec->setStrokeStyle(fWidth); |
121 | 8.16k | return true; |
122 | 8.16k | } |
123 | 2.26k | return false; |
124 | 2.26k | } |
125 | | |
126 | 8.12M | void nextSpan(int u, int v, int ucount, SkPath* dst) const override { |
127 | 8.12M | if (ucount > 1) { |
128 | 4.28M | SkPoint src[2], dstP[2]; |
129 | | |
130 | 4.28M | src[0].set(SkIntToScalar(u) + SK_ScalarHalf, SkIntToScalar(v) + SK_ScalarHalf); |
131 | 4.28M | src[1].set(SkIntToScalar(u+ucount) + SK_ScalarHalf, SkIntToScalar(v) + SK_ScalarHalf); |
132 | 4.28M | this->getMatrix().mapPoints(dstP, src, 2); |
133 | | |
134 | 4.28M | dst->moveTo(dstP[0]); |
135 | 4.28M | dst->lineTo(dstP[1]); |
136 | 4.28M | } |
137 | 8.12M | } |
138 | | |
139 | 0 | static sk_sp<SkFlattenable> CreateProc(SkReadBuffer& buffer) { |
140 | 0 | SkMatrix matrix; |
141 | 0 | buffer.readMatrix(&matrix); |
142 | 0 | SkScalar width = buffer.readScalar(); |
143 | 0 | return SkLine2DPathEffect::Make(width, matrix); |
144 | 0 | } |
145 | | |
146 | 1.60k | void flatten(SkWriteBuffer &buffer) const override { |
147 | 1.60k | buffer.writeMatrix(this->getMatrix()); |
148 | 1.60k | buffer.writeScalar(fWidth); |
149 | 1.60k | } |
150 | | |
151 | 1.60k | Factory getFactory() const override { return CreateProc; } |
152 | 1.60k | const char* getTypeName() const override { return "SkLine2DPathEffect"; } |
153 | | |
154 | | private: |
155 | | SkScalar fWidth; |
156 | | |
157 | | using INHERITED = Sk2DPathEffect; |
158 | | }; |
159 | | |
160 | | ///////////////////////////////////////////////////////////////////////////////////////////////// |
161 | | |
162 | | class SK_API SkPath2DPathEffectImpl : public Sk2DPathEffect { |
163 | | public: |
164 | 12.3k | SkPath2DPathEffectImpl(const SkMatrix& m, const SkPath& p) : INHERITED(m), fPath(p) {} |
165 | | |
166 | 90.9M | void next(const SkPoint& loc, int u, int v, SkPath* dst) const override { |
167 | 90.9M | dst->addPath(fPath, loc.fX, loc.fY); |
168 | 90.9M | } |
169 | | |
170 | 0 | static sk_sp<SkFlattenable> CreateProc(SkReadBuffer& buffer) { |
171 | 0 | SkMatrix matrix; |
172 | 0 | buffer.readMatrix(&matrix); |
173 | 0 | SkPath path; |
174 | 0 | buffer.readPath(&path); |
175 | 0 | return SkPath2DPathEffect::Make(matrix, path); |
176 | 0 | } |
177 | | |
178 | 1.81k | void flatten(SkWriteBuffer& buffer) const override { |
179 | 1.81k | buffer.writeMatrix(this->getMatrix()); |
180 | 1.81k | buffer.writePath(fPath); |
181 | 1.81k | } |
182 | | |
183 | 1.81k | Factory getFactory() const override { return CreateProc; } |
184 | 1.81k | const char* getTypeName() const override { return "SkPath2DPathEffect"; } |
185 | | |
186 | | private: |
187 | | SkPath fPath; |
188 | | |
189 | | using INHERITED = Sk2DPathEffect; |
190 | | }; |
191 | | |
192 | | ////////////////////////////////////////////////////////////////////////////////////////////////// |
193 | | |
194 | 9.16k | sk_sp<SkPathEffect> SkLine2DPathEffect::Make(SkScalar width, const SkMatrix& matrix) { |
195 | 9.16k | if (!(width >= 0)) { |
196 | 562 | return nullptr; |
197 | 562 | } |
198 | 8.60k | return sk_sp<SkPathEffect>(new SkLine2DPathEffectImpl(width, matrix)); |
199 | 8.60k | } |
200 | | |
201 | 12.3k | sk_sp<SkPathEffect> SkPath2DPathEffect::Make(const SkMatrix& matrix, const SkPath& path) { |
202 | 12.3k | return sk_sp<SkPathEffect>(new SkPath2DPathEffectImpl(matrix, path)); |
203 | 12.3k | } |
204 | | |
205 | 3 | void SkLine2DPathEffect::RegisterFlattenables() { |
206 | 3 | SK_REGISTER_FLATTENABLE(SkLine2DPathEffectImpl); |
207 | 3 | } |
208 | | |
209 | 3 | void SkPath2DPathEffect::RegisterFlattenables() { |
210 | 3 | SK_REGISTER_FLATTENABLE(SkPath2DPathEffectImpl); |
211 | 3 | } |