1/* 2 * Copyright 2011 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 "SkBlurMask.h" 10#include "SkBlurMaskFilter.h" 11#include "SkCanvas.h" 12#include "SkGraphics.h" 13#include "SkLayerDrawLooper.h" 14#include "SkRandom.h" 15 16#define WIDTH 200 17#define HEIGHT 200 18 19class DrawLooperGM : public skiagm::GM { 20public: 21 DrawLooperGM() : fLooper(nullptr) { 22 this->setBGColor(sk_tool_utils::color_to_565(0xFFDDDDDD)); 23 } 24 25 virtual ~DrawLooperGM() { 26 SkSafeUnref(fLooper); 27 } 28 29protected: 30 virtual SkISize onISize() override { 31 return SkISize::Make(520, 160); 32 } 33 34 SkString onShortName() override { 35 return SkString("drawlooper"); 36 } 37 38 void onDraw(SkCanvas* canvas) override { 39 this->init(); 40 41 SkPaint paint; 42 paint.setAntiAlias(true); 43 sk_tool_utils::set_portable_typeface(&paint); 44 paint.setTextSize(SkIntToScalar(72)); 45 paint.setLooper(fLooper); 46 47 canvas->drawCircle(SkIntToScalar(50), SkIntToScalar(50), 48 SkIntToScalar(30), paint); 49 50 canvas->drawRectCoords(SkIntToScalar(150), SkIntToScalar(50), 51 SkIntToScalar(200), SkIntToScalar(100), paint); 52 53 canvas->drawText("Looper", 6, SkIntToScalar(230), SkIntToScalar(100), 54 paint); 55 } 56 57private: 58 SkLayerDrawLooper* fLooper; 59 60 void init() { 61 if (fLooper) return; 62 63 static const struct { 64 SkColor fColor; 65 SkPaint::Style fStyle; 66 SkScalar fWidth; 67 SkScalar fOffset; 68 SkScalar fBlur; 69 } gParams[] = { 70 { SK_ColorWHITE, SkPaint::kStroke_Style, SkIntToScalar(1)*3/4, 0, 0 }, 71 { SK_ColorRED, SkPaint::kStroke_Style, SkIntToScalar(4), 0, 0 }, 72 { SK_ColorBLUE, SkPaint::kFill_Style, 0, 0, 0 }, 73 { 0x88000000, SkPaint::kFill_Style, 0, SkIntToScalar(10), SkIntToScalar(3) } 74 }; 75 76 SkLayerDrawLooper::Builder looperBuilder; 77 78 SkLayerDrawLooper::LayerInfo info; 79 info.fPaintBits = SkLayerDrawLooper::kStyle_Bit | SkLayerDrawLooper::kMaskFilter_Bit; 80 info.fColorMode = SkXfermode::kSrc_Mode; 81 82 for (size_t i = 0; i < SK_ARRAY_COUNT(gParams); i++) { 83 info.fOffset.set(gParams[i].fOffset, gParams[i].fOffset); 84 SkPaint* paint = looperBuilder.addLayer(info); 85 paint->setColor(gParams[i].fColor); 86 paint->setStyle(gParams[i].fStyle); 87 paint->setStrokeWidth(gParams[i].fWidth); 88 if (gParams[i].fBlur > 0) { 89 SkMaskFilter* mf = SkBlurMaskFilter::Create(kNormal_SkBlurStyle, 90 SkBlurMask::ConvertRadiusToSigma(gParams[i].fBlur)); 91 paint->setMaskFilter(mf)->unref(); 92 } 93 } 94 fLooper = looperBuilder.detachLooper(); 95 } 96 97 typedef GM INHERITED; 98}; 99 100////////////////////////////////////////////////////////////////////////////// 101 102DEF_GM( return new DrawLooperGM; ) 103