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Side by Side Diff: gm/beziers.cpp

Issue 805963002: There can be only one (SkRandom)! (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: Rebase Created 6 years ago
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1 /* 1 /*
2 * Copyright 2014 Google Inc. 2 * Copyright 2014 Google Inc.
3 * 3 *
4 * Use of this source code is governed by a BSD-style license that can be 4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file. 5 * found in the LICENSE file.
6 */ 6 */
7 7
8 #include "gm.h" 8 #include "gm.h"
9 #include "SkRandom.h" 9 #include "SkRandom.h"
10 10
11 #define W 400 11 #define W 400
12 #define H 400 12 #define H 400
13 #define N 10 13 #define N 10
14 14
15 static const SkScalar SH = SkIntToScalar(H); 15 static const SkScalar SH = SkIntToScalar(H);
16 16
17 static void rnd_quad(SkPath* p, SkPaint* paint, SkLCGRandom& rand) { 17 static void rnd_quad(SkPath* p, SkPaint* paint, SkRandom& rand) {
18 p->moveTo(rand.nextRangeScalar(0, W), rand.nextRangeScalar(0, H)); 18 p->moveTo(rand.nextRangeScalar(0, W), rand.nextRangeScalar(0, H));
19 for (int x = 0; x < 2; ++x) { 19 for (int x = 0; x < 2; ++x) {
20 p->quadTo(rand.nextRangeScalar(W / 4, W), rand.nextRangeScalar(0, H), 20 p->quadTo(rand.nextRangeScalar(W / 4, W), rand.nextRangeScalar(0, H),
21 rand.nextRangeScalar(0, W), rand.nextRangeScalar(H / 4, H)); 21 rand.nextRangeScalar(0, W), rand.nextRangeScalar(H / 4, H));
22 } 22 }
23 paint->setColor(rand.nextU()); 23 paint->setColor(rand.nextU());
24 SkScalar width = rand.nextRangeScalar(1, 5); 24 SkScalar width = rand.nextRangeScalar(1, 5);
25 width *= width; 25 width *= width;
26 paint->setStrokeWidth(width); 26 paint->setStrokeWidth(width);
27 paint->setAlpha(0xFF); 27 paint->setAlpha(0xFF);
28 } 28 }
29 29
30 static void rnd_cubic(SkPath* p, SkPaint* paint, SkLCGRandom& rand) { 30 static void rnd_cubic(SkPath* p, SkPaint* paint, SkRandom& rand) {
31 p->moveTo(rand.nextRangeScalar(0, W), rand.nextRangeScalar(0, H)); 31 p->moveTo(rand.nextRangeScalar(0, W), rand.nextRangeScalar(0, H));
32 for (int x = 0; x < 2; ++x) { 32 for (int x = 0; x < 2; ++x) {
33 p->cubicTo(rand.nextRangeScalar(W / 4, W), rand.nextRangeScalar(0, H), 33 p->cubicTo(rand.nextRangeScalar(W / 4, W), rand.nextRangeScalar(0, H),
34 rand.nextRangeScalar(0, W), rand.nextRangeScalar(H / 4, H), 34 rand.nextRangeScalar(0, W), rand.nextRangeScalar(H / 4, H),
35 rand.nextRangeScalar(W / 4, W), rand.nextRangeScalar(H / 4, H) ); 35 rand.nextRangeScalar(W / 4, W), rand.nextRangeScalar(H / 4, H) );
36 } 36 }
37 paint->setColor(rand.nextU()); 37 paint->setColor(rand.nextU());
38 SkScalar width = rand.nextRangeScalar(1, 5); 38 SkScalar width = rand.nextRangeScalar(1, 5);
39 width *= width; 39 width *= width;
40 paint->setStrokeWidth(width); 40 paint->setStrokeWidth(width);
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57 virtual SkISize onISize() { 57 virtual SkISize onISize() {
58 return SkISize::Make(W, H*2); 58 return SkISize::Make(W, H*2);
59 } 59 }
60 60
61 virtual void onDraw(SkCanvas* canvas) { 61 virtual void onDraw(SkCanvas* canvas) {
62 SkPaint paint; 62 SkPaint paint;
63 paint.setStyle(SkPaint::kStroke_Style); 63 paint.setStyle(SkPaint::kStroke_Style);
64 paint.setStrokeWidth(SkIntToScalar(9)/2); 64 paint.setStrokeWidth(SkIntToScalar(9)/2);
65 paint.setAntiAlias(true); 65 paint.setAntiAlias(true);
66 66
67 SkLCGRandom rand; 67 SkRandom rand;
68 for (int i = 0; i < N; i++) { 68 for (int i = 0; i < N; i++) {
69 SkPath p; 69 SkPath p;
70 rnd_quad(&p, &paint, rand); 70 rnd_quad(&p, &paint, rand);
71 canvas->drawPath(p, paint); 71 canvas->drawPath(p, paint);
72 } 72 }
73 canvas->translate(0, SH); 73 canvas->translate(0, SH);
74 for (int i = 0; i < N; i++) { 74 for (int i = 0; i < N; i++) {
75 SkPath p; 75 SkPath p;
76 rnd_cubic(&p, &paint, rand); 76 rnd_cubic(&p, &paint, rand);
77 canvas->drawPath(p, paint); 77 canvas->drawPath(p, paint);
78 } 78 }
79 } 79 }
80 80
81 private: 81 private:
82 typedef skiagm::GM INHERITED; 82 typedef skiagm::GM INHERITED;
83 }; 83 };
84 84
85 static skiagm::GM* F0(void*) { return new BeziersGM; } 85 static skiagm::GM* F0(void*) { return new BeziersGM; }
86 static skiagm::GMRegistry R0(F0); 86 static skiagm::GMRegistry R0(F0);
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