egdaniel@google.com | def9f6e | 2013-06-20 16:54:31 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2013 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 | #include "gm.h" |
| 9 | #include "SkCanvas.h" |
| 10 | #include "SkTArray.h" |
| 11 | |
| 12 | namespace skiagm { |
| 13 | |
| 14 | class ConicPathsGM : public GM { |
| 15 | protected: |
| 16 | |
| 17 | virtual SkString onShortName() SK_OVERRIDE { |
| 18 | return SkString("conicpaths"); |
| 19 | } |
| 20 | |
skia.committer@gmail.com | 09ebe0b | 2013-06-21 07:00:53 +0000 | [diff] [blame] | 21 | virtual SkISize onISize() SK_OVERRIDE { |
egdaniel@google.com | 45a3071 | 2013-06-20 21:18:05 +0000 | [diff] [blame] | 22 | return SkISize::Make(1000, 1000); |
egdaniel@google.com | def9f6e | 2013-06-20 16:54:31 +0000 | [diff] [blame] | 23 | } |
| 24 | |
| 25 | virtual void onOnceBeforeDraw() SK_OVERRIDE { |
| 26 | { |
| 27 | SkPath* conicCirlce = &fPaths.push_back(); |
| 28 | conicCirlce->moveTo(0, -0); |
| 29 | conicCirlce->conicTo(SkIntToScalar(0), SkIntToScalar(50), |
| 30 | SkIntToScalar(50), SkIntToScalar(50), |
| 31 | SkScalarHalf(SkScalarSqrt(2))); |
| 32 | conicCirlce->rConicTo(SkIntToScalar(50), SkIntToScalar(0), |
| 33 | SkIntToScalar(50), SkIntToScalar(-50), |
| 34 | SkScalarHalf(SkScalarSqrt(2))); |
| 35 | conicCirlce->rConicTo(SkIntToScalar(0), SkIntToScalar(-50), |
| 36 | SkIntToScalar(-50), SkIntToScalar(-50), |
| 37 | SkScalarHalf(SkScalarSqrt(2))); |
| 38 | conicCirlce->rConicTo(SkIntToScalar(-50), SkIntToScalar(0), |
| 39 | SkIntToScalar(-50), SkIntToScalar(50), |
| 40 | SkScalarHalf(SkScalarSqrt(2))); |
| 41 | |
| 42 | } |
| 43 | { |
| 44 | SkPath* hyperbola = &fPaths.push_back(); |
| 45 | hyperbola->moveTo(0, -0); |
| 46 | hyperbola->conicTo(SkIntToScalar(0), SkIntToScalar(100), |
| 47 | SkIntToScalar(100), SkIntToScalar(100), |
| 48 | SkIntToScalar(2)); |
| 49 | } |
| 50 | { |
| 51 | SkPath* thinHyperbola = &fPaths.push_back(); |
| 52 | thinHyperbola->moveTo(0, -0); |
| 53 | thinHyperbola->conicTo(SkIntToScalar(100), SkIntToScalar(100), |
| 54 | SkIntToScalar(5), SkIntToScalar(0), |
| 55 | SkIntToScalar(2)); |
| 56 | } |
| 57 | { |
| 58 | SkPath* veryThinHyperbola = &fPaths.push_back(); |
| 59 | veryThinHyperbola->moveTo(0, -0); |
| 60 | veryThinHyperbola->conicTo(SkIntToScalar(100), SkIntToScalar(100), |
| 61 | SkIntToScalar(1), SkIntToScalar(0), |
| 62 | SkIntToScalar(2)); |
| 63 | } |
| 64 | { |
| 65 | SkPath* closedHyperbola = &fPaths.push_back(); |
| 66 | closedHyperbola->moveTo(0, -0); |
| 67 | closedHyperbola->conicTo(SkIntToScalar(100), SkIntToScalar(100), |
| 68 | SkIntToScalar(0), SkIntToScalar(0), |
| 69 | SkIntToScalar(2)); |
| 70 | } |
| 71 | { |
| 72 | // using 1 as weight defaults to using quadTo |
| 73 | SkPath* nearParabola = &fPaths.push_back(); |
| 74 | nearParabola->moveTo(0, -0); |
| 75 | nearParabola->conicTo(SkIntToScalar(0), SkIntToScalar(100), |
| 76 | SkIntToScalar(100), SkIntToScalar(100), |
reed@google.com | c464cbd | 2013-06-20 17:37:24 +0000 | [diff] [blame] | 77 | 0.999f); |
egdaniel@google.com | def9f6e | 2013-06-20 16:54:31 +0000 | [diff] [blame] | 78 | } |
| 79 | { |
| 80 | SkPath* thinEllipse = &fPaths.push_back(); |
| 81 | thinEllipse->moveTo(0, -0); |
| 82 | thinEllipse->conicTo(SkIntToScalar(100), SkIntToScalar(100), |
| 83 | SkIntToScalar(5), SkIntToScalar(0), |
| 84 | SK_ScalarHalf); |
| 85 | } |
| 86 | { |
| 87 | SkPath* veryThinEllipse = &fPaths.push_back(); |
| 88 | veryThinEllipse->moveTo(0, -0); |
| 89 | veryThinEllipse->conicTo(SkIntToScalar(100), SkIntToScalar(100), |
| 90 | SkIntToScalar(1), SkIntToScalar(0), |
| 91 | SK_ScalarHalf); |
| 92 | } |
| 93 | { |
| 94 | SkPath* closedEllipse = &fPaths.push_back(); |
| 95 | closedEllipse->moveTo(0, -0); |
| 96 | closedEllipse->conicTo(SkIntToScalar(100), SkIntToScalar(100), |
| 97 | SkIntToScalar(0), SkIntToScalar(0), |
| 98 | SK_ScalarHalf); |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { |
| 103 | static const SkAlpha kAlphaValue[] = { 0xFF, 0x40 }; |
| 104 | |
| 105 | enum { |
| 106 | kMargin = 15, |
| 107 | }; |
| 108 | int wrapX = canvas->getDeviceSize().fWidth - kMargin; |
| 109 | |
| 110 | SkScalar maxH = 0; |
| 111 | canvas->translate(SkIntToScalar(kMargin), SkIntToScalar(kMargin)); |
| 112 | canvas->save(); |
| 113 | |
| 114 | SkScalar x = SkIntToScalar(kMargin); |
| 115 | for (int p = 0; p < fPaths.count(); ++p) { |
| 116 | for (size_t a = 0; a < SK_ARRAY_COUNT(kAlphaValue); ++a) { |
| 117 | for (int aa = 0; aa < 2; ++aa) { |
| 118 | for (int fh = 0; fh < 2; ++fh) { |
| 119 | |
| 120 | const SkRect& bounds = fPaths[p].getBounds(); |
| 121 | |
| 122 | if (x + bounds.width() > wrapX) { |
| 123 | canvas->restore(); |
| 124 | canvas->translate(0, maxH + SkIntToScalar(kMargin)); |
| 125 | canvas->save(); |
| 126 | maxH = 0; |
| 127 | x = SkIntToScalar(kMargin); |
| 128 | } |
| 129 | |
| 130 | SkPaint paint; |
| 131 | paint.setARGB(kAlphaValue[a], 0, 0, 0); |
| 132 | paint.setAntiAlias(SkToBool(aa)); |
| 133 | if (fh == 1) { |
| 134 | paint.setStyle(SkPaint::kStroke_Style); |
| 135 | paint.setStrokeWidth(0); |
| 136 | } else if (fh == 0) { |
| 137 | paint.setStyle(SkPaint::kFill_Style); |
| 138 | } |
| 139 | canvas->save(); |
| 140 | canvas->translate(-bounds.fLeft, -bounds.fTop); |
| 141 | canvas->drawPath(fPaths[p], paint); |
| 142 | canvas->restore(); |
| 143 | |
| 144 | maxH = SkMaxScalar(maxH, bounds.height()); |
| 145 | |
| 146 | SkScalar dx = bounds.width() + SkIntToScalar(kMargin); |
| 147 | x += dx; |
| 148 | canvas->translate(dx, 0); |
| 149 | } |
| 150 | } |
| 151 | } |
| 152 | } |
| 153 | canvas->restore(); |
| 154 | } |
| 155 | |
reed@google.com | c464cbd | 2013-06-20 17:37:24 +0000 | [diff] [blame] | 156 | virtual uint32_t onGetFlags() const SK_OVERRIDE { |
| 157 | return kSkipPDF_Flag; |
| 158 | } |
| 159 | |
egdaniel@google.com | def9f6e | 2013-06-20 16:54:31 +0000 | [diff] [blame] | 160 | private: |
| 161 | SkTArray<SkPath> fPaths; |
| 162 | typedef GM INHERITED; |
| 163 | }; |
| 164 | |
| 165 | ////////////////////////////////////////////////////////////////////////////// |
| 166 | |
| 167 | DEF_GM( return SkNEW(ConicPathsGM); ) |
| 168 | } |