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bsalomon@google.com632151b2012-02-13 15:18:34 +00001/*
2 * Copyright 2012 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#include "gm.h"
8#include "SkCanvas.h"
9#include "SkPaint.h"
10#include "Sk1DPathEffect.h"
11#include "Sk2DPathEffect.h"
12#include "SkCornerPathEffect.h"
13#include "SkDashPathEffect.h"
14#include "SkDiscretePathEffect.h"
15
16namespace skiagm {
17
18static void compose_pe(SkPaint* paint) {
19 SkPathEffect* pe = paint->getPathEffect();
reeda4393342016-03-18 11:22:57 -070020 sk_sp<SkPathEffect> corner = SkCornerPathEffect::Make(25);
21 sk_sp<SkPathEffect> compose;
bsalomon@google.com632151b2012-02-13 15:18:34 +000022 if (pe) {
Mike Reeda07741a2017-02-25 22:34:32 -050023 compose = SkPathEffect::MakeCompose(sk_ref_sp(pe), corner);
bsalomon@google.com632151b2012-02-13 15:18:34 +000024 } else {
25 compose = corner;
26 }
reeda4393342016-03-18 11:22:57 -070027 paint->setPathEffect(compose);
bsalomon@google.com632151b2012-02-13 15:18:34 +000028}
29
30static void hair_pe(SkPaint* paint) {
31 paint->setStrokeWidth(0);
32}
33
34static void hair2_pe(SkPaint* paint) {
35 paint->setStrokeWidth(0);
36 compose_pe(paint);
37}
38
39static void stroke_pe(SkPaint* paint) {
40 paint->setStrokeWidth(12);
41 compose_pe(paint);
42}
43
44static void dash_pe(SkPaint* paint) {
45 SkScalar inter[] = { 20, 10, 10, 10 };
46 paint->setStrokeWidth(12);
reeda4393342016-03-18 11:22:57 -070047 paint->setPathEffect(SkDashPathEffect::Make(inter, SK_ARRAY_COUNT(inter), 0));
bsalomon@google.com632151b2012-02-13 15:18:34 +000048 compose_pe(paint);
49}
50
mtkleindbfd7ab2016-09-01 11:24:54 -070051constexpr int gXY[] = {
bsalomon@google.com632151b2012-02-13 15:18:34 +0000524, 0, 0, -4, 8, -4, 12, 0, 8, 4, 0, 4
53};
54
55static void scale(SkPath* path, SkScalar scale) {
56 SkMatrix m;
57 m.setScale(scale, scale);
58 path->transform(m);
59}
60
61static void one_d_pe(SkPaint* paint) {
62 SkPath path;
63 path.moveTo(SkIntToScalar(gXY[0]), SkIntToScalar(gXY[1]));
64 for (unsigned i = 2; i < SK_ARRAY_COUNT(gXY); i += 2)
65 path.lineTo(SkIntToScalar(gXY[i]), SkIntToScalar(gXY[i+1]));
66 path.close();
67 path.offset(SkIntToScalar(-6), 0);
caryclark@google.com13130862012-06-06 12:10:45 +000068 scale(&path, 1.5f);
rmistry@google.comae933ce2012-08-23 18:19:56 +000069
reeda4393342016-03-18 11:22:57 -070070 paint->setPathEffect(SkPath1DPathEffect::Make(path, SkIntToScalar(21), 0,
71 SkPath1DPathEffect::kRotate_Style));
bsalomon@google.com632151b2012-02-13 15:18:34 +000072 compose_pe(paint);
73}
74
75typedef void (*PE_Proc)(SkPaint*);
mtkleindbfd7ab2016-09-01 11:24:54 -070076constexpr PE_Proc gPE[] = { hair_pe, hair2_pe, stroke_pe, dash_pe, one_d_pe };
bsalomon@google.com632151b2012-02-13 15:18:34 +000077
78static void fill_pe(SkPaint* paint) {
79 paint->setStyle(SkPaint::kFill_Style);
halcanary96fcdcc2015-08-27 07:41:13 -070080 paint->setPathEffect(nullptr);
bsalomon@google.com632151b2012-02-13 15:18:34 +000081}
82
83static void discrete_pe(SkPaint* paint) {
reeda4393342016-03-18 11:22:57 -070084 paint->setPathEffect(SkDiscretePathEffect::Make(10, 4));
bsalomon@google.com632151b2012-02-13 15:18:34 +000085}
86
reeda4393342016-03-18 11:22:57 -070087static sk_sp<SkPathEffect> MakeTileEffect() {
bsalomon@google.com632151b2012-02-13 15:18:34 +000088 SkMatrix m;
89 m.setScale(SkIntToScalar(12), SkIntToScalar(12));
90
91 SkPath path;
92 path.addCircle(0, 0, SkIntToScalar(5));
rmistry@google.comae933ce2012-08-23 18:19:56 +000093
reeda4393342016-03-18 11:22:57 -070094 return SkPath2DPathEffect::Make(m, path);
bsalomon@google.com632151b2012-02-13 15:18:34 +000095}
96
97static void tile_pe(SkPaint* paint) {
reeda4393342016-03-18 11:22:57 -070098 paint->setPathEffect(MakeTileEffect());
bsalomon@google.com632151b2012-02-13 15:18:34 +000099}
100
mtkleindbfd7ab2016-09-01 11:24:54 -0700101constexpr PE_Proc gPE2[] = { fill_pe, discrete_pe, tile_pe };
bsalomon@google.com632151b2012-02-13 15:18:34 +0000102
103class PathEffectGM : public GM {
104public:
105 PathEffectGM() {}
106
107protected:
commit-bot@chromium.orga90c6802014-04-30 13:20:45 +0000108
mtklein36352bf2015-03-25 18:17:31 -0700109 SkString onShortName() override {
bsalomon@google.com632151b2012-02-13 15:18:34 +0000110 return SkString("patheffect");
111 }
112
mtklein36352bf2015-03-25 18:17:31 -0700113 SkISize onISize() override { return SkISize::Make(800, 600); }
bsalomon@google.com632151b2012-02-13 15:18:34 +0000114
mtklein36352bf2015-03-25 18:17:31 -0700115 void onDraw(SkCanvas* canvas) override {
bsalomon@google.com632151b2012-02-13 15:18:34 +0000116 SkPaint paint;
117 paint.setAntiAlias(true);
118 paint.setStyle(SkPaint::kStroke_Style);
119
120 SkPath path;
121 path.moveTo(20, 20);
122 path.lineTo(70, 120);
123 path.lineTo(120, 30);
124 path.lineTo(170, 80);
125 path.lineTo(240, 50);
126
127 size_t i;
128 canvas->save();
129 for (i = 0; i < SK_ARRAY_COUNT(gPE); i++) {
130 gPE[i](&paint);
131 canvas->drawPath(path, paint);
132 canvas->translate(0, 75);
133 }
134 canvas->restore();
135
136 path.reset();
137 SkRect r = { 0, 0, 250, 120 };
138 path.addOval(r, SkPath::kCW_Direction);
139 r.inset(50, 50);
140 path.addRect(r, SkPath::kCCW_Direction);
141
142 canvas->translate(320, 20);
143 for (i = 0; i < SK_ARRAY_COUNT(gPE2); i++) {
144 gPE2[i](&paint);
145 canvas->drawPath(path, paint);
146 canvas->translate(0, 160);
147 }
bsalomon@google.com22f42b72012-03-26 14:36:55 +0000148
149 SkIRect rect = SkIRect::MakeXYWH(20, 20, 60, 60);
150 for (i = 0; i < SK_ARRAY_COUNT(gPE); i++) {
151 SkPaint p;
152 p.setAntiAlias(true);
153 p.setStyle(SkPaint::kFill_Style);
154 gPE[i](&p);
155 canvas->drawIRect(rect, p);
156 canvas->translate(75, 0);
157 }
bsalomon@google.com632151b2012-02-13 15:18:34 +0000158 }
159
160private:
161 typedef GM INHERITED;
162};
163
164//////////////////////////////////////////////////////////////////////////////
165
166static GM* PathEffectFactory(void*) { return new PathEffectGM; }
167static GMRegistry regPathEffect(PathEffectFactory);
168
169}