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| 1 | |
| 2 /* | |
| 3 * Copyright 2011 Google Inc. | |
| 4 * | |
| 5 * Use of this source code is governed by a BSD-style license that can be | |
| 6 * found in the LICENSE file. | |
| 7 */ | |
| 8 #include "SampleCode.h" | |
| 9 #include "SkCanvas.h" | |
| 10 #include "SkGradientShader.h" | |
| 11 | |
| 12 class GradientView : public SampleView { | |
| 13 public: | |
| 14 GradientView() { | |
| 15 this->setBGColor(0xFFDDDDDD); | |
| 16 } | |
| 17 | |
| 18 protected: | |
| 19 struct GradData { | |
| 20 int fCount; | |
| 21 const SkColor* fColors; | |
| 22 const SkScalar* fPos; | |
| 23 }; | |
| 24 // overrides from SkEventSink | |
| 25 virtual bool onQuery(SkEvent* evt) { | |
| 26 if (SampleCode::TitleQ(*evt)) { | |
| 27 SampleCode::TitleR(evt, "Gradients"); | |
| 28 return true; | |
| 29 } | |
| 30 return this->INHERITED::onQuery(evt); | |
| 31 } | |
| 32 virtual void onDrawContent(SkCanvas* canvas) { | |
| 33 SkPaint paint; | |
| 34 paint.setAntiAlias(true); | |
| 35 paint.setStyle(SkPaint::kStroke_Style); | |
| 36 paint.setStrokeWidth(SkScalarHalf(SkIntToScalar(3))); | |
| 37 paint.setStyle(SkPaint::kFill_Style); | |
| 38 | |
| 39 SkPoint p = SkPoint::Make(0,0); | |
| 40 SkPoint q = SkPoint::Make(100,100); | |
| 41 SkPoint pts[] = {p, q}; | |
| 42 | |
| 43 SkScalar t, temp, x, y; | |
| 44 SkColor gColors[] = { | |
| 45 SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLA
CK | |
| 46 }; | |
| 47 t = SampleCode::GetAnimScalar(SkIntToScalar(2), SkIntToScalar(20)); | |
| 48 temp = SampleCode::GetAnimScalar(SkIntToScalar(1), SkIntToScalar(8)); | |
| 49 SkScalar step = SK_ScalarPI / (10); | |
| 50 SkScalar angle = t * step; | |
| 51 x = SkScalarSinCos(angle, &y); | |
| 52 SkScalar colorPositions[] = { 0, 0.1 + x, 0.4 + y, 0.9 - x + y, 1.0}; | |
| 53 GradData data = { 5, gColors, colorPositions }; | |
| 54 | |
| 55 | |
| 56 SkRect r = { 0, 0, SkIntToScalar(200), SkIntToScalar(200) }; | |
| 57 SkShader* shader1 = SkGradientShader::CreateLinear( | |
| 58 pts, data.fColors, data.fPos,data.fCount, | |
| 59 SkShader::kMirror_TileMode); | |
| 60 paint.setShader(shader1)->unref(); | |
| 61 | |
| 62 canvas->drawRect(r, paint); | |
| 63 | |
| 64 | |
| 65 SkPoint s = SkPoint::Make(100,100); | |
| 66 SkShader* shader2 = SkGradientShader::CreateRadial( | |
| 67 s, 100, data.fColors, data.fPos, data.fCount, | |
| 68 SkShader::kMirror_TileMode); | |
| 69 paint.setShader(shader2)->unref(); | |
| 70 canvas->translate(250, 0); | |
| 71 canvas->drawRect(r, paint); | |
| 72 | |
| 73 SkShader* shader3 = SkGradientShader::CreateTwoPointRadial( | |
| 74 p, 0, q, 100, data.fColors, data.fPos, data.fCount, | |
| 75 SkShader::kMirror_TileMode); | |
| 76 paint.setShader(shader3)->unref(); | |
| 77 canvas->translate(0, 250); | |
| 78 canvas->drawRect(r, paint); | |
| 79 | |
| 80 SkShader* shader4 = SkGradientShader::CreateSweep( | |
| 81 100, 100, data.fColors, data.fPos, data.fCount); | |
| 82 | |
| 83 paint.setShader(shader4)->unref(); | |
| 84 canvas->translate(-250, 0); | |
| 85 canvas->drawRect(r, paint); | |
| 86 | |
| 87 this->inval(NULL); | |
| 88 } | |
| 89 | |
| 90 private: | |
| 91 typedef SampleView INHERITED; | |
| 92 }; | |
| 93 | |
| 94 ////////////////////////////////////////////////////////////////////////////// | |
| 95 | |
| 96 static SkView* MyFactory() { return new GradientView; } | |
| 97 static SkViewRegister reg(MyFactory); | |
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Chromium Code Reviews
Issue 888283002:
allow GMs to animate (Closed)
Base URL: https://skia.googlesource.com/skia.git@master