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| 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 SkString onShortName() SK_OVERRIDE { |
| 43 return SkString("lerpmode"); |
| 44 } |
| 45 |
| 46 virtual SkISize onISize() SK_OVERRIDE { |
| 47 return SkISize::Make(240, 120); |
| 48 } |
| 49 |
| 50 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { |
| 51 show_circlelayers(canvas, NULL); |
| 52 canvas->translate(150, 0); |
| 53 SkAutoTUnref<SkXfermode> mode(SkLerpXfermode::Create(0.5f)); |
| 54 show_circlelayers(canvas, mode.get()); |
| 55 } |
| 56 |
| 57 private: |
| 58 typedef skiagm::GM INHERITED; |
| 59 }; |
| 60 |
| 61 ////////////////////////////////////////////////////////////////////////////// |
| 62 |
| 63 DEF_GM( return SkNEW(LerpXfermodeGM); ) |
| 64 |
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