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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 "SkColorFilter.h" |
| 10 #include "SkBlurMaskFilter.h" |
| 11 |
| 12 namespace skiagm { |
| 13 |
| 14 /** |
| 15 * This test exercises bug 1719. An anti-aliased blurred path is rendered throug
h a soft clip. On |
| 16 * the GPU a scratch texture was used to hold the original path mask as well as
the blurred path |
| 17 * result. The same texture is then incorrectly used to generate the soft clip m
ask for the draw. |
| 18 * Thus the same texture is used for both the blur mask and soft mask in a singl
e draw. |
| 19 * |
| 20 * The correct image should look like a thin stroked round rect. |
| 21 */ |
| 22 class SkBug1719GM : public GM { |
| 23 public: |
| 24 SkBug1719GM() {} |
| 25 |
| 26 protected: |
| 27 virtual SkString onShortName() SK_OVERRIDE { |
| 28 return SkString("skbug1719"); |
| 29 } |
| 30 |
| 31 virtual SkISize onISize() SK_OVERRIDE { |
| 32 return make_isize(300, 100); |
| 33 } |
| 34 |
| 35 virtual void onDrawBackground(SkCanvas* canvas) SK_OVERRIDE { |
| 36 SkPaint bgPaint; |
| 37 bgPaint.setColor(0xFF303030); |
| 38 canvas->drawPaint(bgPaint); |
| 39 } |
| 40 |
| 41 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { |
| 42 canvas->translate(SkIntToScalar(-800), SkIntToScalar(-650)); |
| 43 |
| 44 // The data is lifted from an SKP that exhibited the bug. |
| 45 |
| 46 // This is a round rect. |
| 47 SkPath clipPath; |
| 48 clipPath.moveTo(832.f, 654.f); |
| 49 clipPath.lineTo(1034.f, 654.f); |
| 50 clipPath.cubicTo(1038.4183f, 654.f, 1042.f, 657.58173f, 1042.f, 662.f); |
| 51 clipPath.lineTo(1042.f, 724.f); |
| 52 clipPath.cubicTo(1042.f, 728.41827f, 1038.4183f, 732.f, 1034.f, 732.f); |
| 53 clipPath.lineTo(832.f, 732.f); |
| 54 clipPath.cubicTo(827.58173f, 732.f, 824.f, 728.41827f, 824.f, 724.f); |
| 55 clipPath.lineTo(824.f, 662.f); |
| 56 clipPath.cubicTo(824.f, 657.58173f, 827.58173f, 654.f, 832.f, 654.f); |
| 57 clipPath.close(); |
| 58 |
| 59 // This is a round rect nested inside a rect. |
| 60 SkPath drawPath; |
| 61 drawPath.moveTo(823.f, 653.f); |
| 62 drawPath.lineTo(1043.f, 653.f); |
| 63 drawPath.lineTo(1043.f, 733.f); |
| 64 drawPath.lineTo(823.f, 733.f); |
| 65 drawPath.lineTo(823.f, 653.f); |
| 66 drawPath.close(); |
| 67 drawPath.moveTo(832.f, 654.f); |
| 68 drawPath.lineTo(1034.f, 654.f); |
| 69 drawPath.cubicTo(1038.4183f, 654.f, 1042.f, 657.58173f, 1042.f, 662.f); |
| 70 drawPath.lineTo(1042.f, 724.f); |
| 71 drawPath.cubicTo(1042.f, 728.41827f, 1038.4183f, 732.f, 1034.f, 732.f); |
| 72 drawPath.lineTo(832.f, 732.f); |
| 73 drawPath.cubicTo(827.58173f, 732.f, 824.f, 728.41827f, 824.f, 724.f); |
| 74 drawPath.lineTo(824.f, 662.f); |
| 75 drawPath.cubicTo(824.f, 657.58173f, 827.58173f, 654.f, 832.f, 654.f); |
| 76 drawPath.close(); |
| 77 drawPath.setFillType(SkPath::kEvenOdd_FillType); |
| 78 |
| 79 SkPaint paint; |
| 80 paint.setAntiAlias(true); |
| 81 paint.setColor(0xFF000000); |
| 82 paint.setMaskFilter( |
| 83 SkBlurMaskFilter::Create(SkBlurMaskFilter::kNormal_BlurStyle, |
| 84 0.78867501f, |
| 85 SkBlurMaskFilter::kHighQuality_BlurFlag))->
unref(); |
| 86 paint.setColorFilter( |
| 87 SkColorFilter::CreateModeFilter(0xBFFFFFFF, SkXfermode::kSrcIn_Mode)
)->unref(); |
| 88 |
| 89 canvas->clipPath(clipPath, SkRegion::kIntersect_Op, true); |
| 90 canvas->drawPath(drawPath, paint); |
| 91 } |
| 92 |
| 93 private: |
| 94 |
| 95 typedef GM INHERITED; |
| 96 }; |
| 97 |
| 98 ////////////////////////////////////////////////////////////////////////////// |
| 99 |
| 100 DEF_GM(return new SkBug1719GM;) |
| 101 |
| 102 } |
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