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| 1 /* |
| 2 * Copyright 2016 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 |
| 10 #include "SkAvoidXfermode.h" |
| 11 |
| 12 // This GM exercises how the avoid xfer mode interacts with partial coverage |
| 13 class AvoidXfermode3GM : public skiagm::GM { |
| 14 public: |
| 15 AvoidXfermode3GM() { } |
| 16 |
| 17 protected: |
| 18 SkString onShortName() override { |
| 19 return SkString("avoidxfermode3"); |
| 20 } |
| 21 |
| 22 SkISize onISize() override { return SkISize::Make(128, 128); } |
| 23 |
| 24 void onDraw(SkCanvas* canvas) override { |
| 25 canvas->drawARGB(255, 0, 0, 0); |
| 26 |
| 27 SkRect r = SkRect::MakeXYWH(16.5f, 16.5f, 96.0f, 96.0f); |
| 28 |
| 29 SkPaint p0; |
| 30 p0.setColor(SK_ColorWHITE); |
| 31 p0.setAntiAlias(true); |
| 32 |
| 33 canvas->drawRect(r, p0); |
| 34 |
| 35 r = SkRect::MakeXYWH(3.5f, 3.5f, 59.0f, 59.0f); |
| 36 |
| 37 // UL corner: replace white with green with a tight tolerance |
| 38 SkPaint p1; |
| 39 p1.setColor(SK_ColorGREEN); |
| 40 p1.setAntiAlias(true); |
| 41 p1.setXfermode(SkAvoidXfermode::Create(SK_ColorWHITE, |
| 42 5, |
| 43 SkAvoidXfermode::kTargetColor_Mod
e))->unref(); |
| 44 |
| 45 canvas->drawRect(r, p1); |
| 46 |
| 47 r.offsetTo(65.5f, 3.5f); |
| 48 |
| 49 // UR corner: draw red everywhere except white with a tight tolerance |
| 50 SkPaint p2; |
| 51 p2.setColor(SK_ColorRED); |
| 52 p2.setAntiAlias(true); |
| 53 p2.setXfermode(SkAvoidXfermode::Create(SK_ColorWHITE, |
| 54 250, |
| 55 SkAvoidXfermode::kAvoidColor_Mode
))->unref(); |
| 56 |
| 57 canvas->drawRect(r, p2); |
| 58 |
| 59 r.offsetTo(3.5f, 65.5f); |
| 60 |
| 61 // LL corner: replace white with blue with a loose tolerance |
| 62 SkPaint p3; |
| 63 p3.setColor(SK_ColorBLUE); |
| 64 p3.setAntiAlias(true); |
| 65 p3.setXfermode(SkAvoidXfermode::Create(SK_ColorWHITE, |
| 66 250, |
| 67 SkAvoidXfermode::kTargetColor_Mod
e))->unref(); |
| 68 |
| 69 canvas->drawRect(r, p3); |
| 70 |
| 71 r.offsetTo(65.5f, 65.5f); |
| 72 |
| 73 // LR corner: draw yellow everywhere except white with a loose tolerance |
| 74 SkPaint p4; |
| 75 p4.setColor(SK_ColorYELLOW); |
| 76 p4.setAntiAlias(true); |
| 77 p4.setXfermode(SkAvoidXfermode::Create(SK_ColorWHITE, |
| 78 5, |
| 79 SkAvoidXfermode::kAvoidColor_Mode
))->unref(); |
| 80 |
| 81 canvas->drawRect(r, p4); |
| 82 } |
| 83 |
| 84 private: |
| 85 typedef GM INHERITED; |
| 86 }; |
| 87 |
| 88 ////////////////////////////////////////////////////////////////////////////// |
| 89 |
| 90 DEF_GM(return new AvoidXfermode3GM;) |
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