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 "SkLerpXfermode.h" 11 12 static void show_circlelayers(SkCanvas* canvas, SkXfermode* mode) { 13 SkPaint paint; 14 paint.setAntiAlias(true); 15 SkRect r, bounds = { 10, 10, 110, 110 }; 16 17 r = bounds; 18 r.fRight = bounds.centerX(); 19 canvas->drawRect(r, paint); 20 21 canvas->saveLayer(&bounds, NULL); 22 23 paint.setColor(0x80FF0000); 24 r = bounds; 25 r.inset(20, 0); 26 canvas->drawOval(r, paint); 27 28 paint.setColor(0x800000FF); 29 r = bounds; 30 r.inset(0, 20); 31 paint.setXfermode(mode); 32 canvas->drawOval(r, paint); 33 34 canvas->restore(); 35 } 36 37 class LerpXfermodeGM : public skiagm::GM { 38 public: 39 LerpXfermodeGM() {} 40 41 protected: 42 virtual uint32_t onGetFlags() const SK_OVERRIDE { 43 return kSkipTiled_Flag; 44 } 45 46 virtual SkString onShortName() SK_OVERRIDE { 47 return SkString("lerpmode"); 48 } 49 50 virtual SkISize onISize() SK_OVERRIDE { 51 return SkISize::Make(240, 120); 52 } 53 54 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { 55 show_circlelayers(canvas, NULL); 56 canvas->translate(150, 0); 57 SkAutoTUnref<SkXfermode> mode(SkLerpXfermode::Create(0.5f)); 58 show_circlelayers(canvas, mode.get()); 59 } 60 61 private: 62 typedef skiagm::GM INHERITED; 63 }; 64 65 ////////////////////////////////////////////////////////////////////////////// 66 67 DEF_GM( return SkNEW(LerpXfermodeGM); ) 68
