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/gm.h" 9 #include "include/core/SkBlendMode.h" 10 #include "include/core/SkBlurTypes.h" 11 #include "include/core/SkCanvas.h" 12 #include "include/core/SkColorFilter.h" 13 #include "include/core/SkMaskFilter.h" 14 #include "include/core/SkPaint.h" 15 #include "include/core/SkPath.h" 16 #include "include/core/SkScalar.h" 17 18 /** 19 * This test exercises bug 1719. An anti-aliased blurred path is rendered through a soft clip. On 20 * the GPU a scratch texture was used to hold the original path mask as well as the blurred path 21 * result. The same texture is then incorrectly used to generate the soft clip mask for the draw. 22 * Thus the same texture is used for both the blur mask and soft mask in a single draw. 23 * 24 * The correct image should look like a thin stroked round rect. 25 */ 26 DEF_SIMPLE_GM_BG(skbug1719, canvas, 300, 100, 0xFF303030) { 27 canvas->translate(SkIntToScalar(-800), SkIntToScalar(-650)); 28 29 // The data is lifted from an SKP that exhibited the bug. 30 31 // This is a round rect. 32 SkPath clipPath; 33 clipPath.moveTo(832.f, 654.f); 34 clipPath.lineTo(1034.f, 654.f); 35 clipPath.cubicTo(1038.4183f, 654.f, 1042.f, 657.58173f, 1042.f, 662.f); 36 clipPath.lineTo(1042.f, 724.f); 37 clipPath.cubicTo(1042.f, 728.41827f, 1038.4183f, 732.f, 1034.f, 732.f); 38 clipPath.lineTo(832.f, 732.f); 39 clipPath.cubicTo(827.58173f, 732.f, 824.f, 728.41827f, 824.f, 724.f); 40 clipPath.lineTo(824.f, 662.f); 41 clipPath.cubicTo(824.f, 657.58173f, 827.58173f, 654.f, 832.f, 654.f); 42 clipPath.close(); 43 44 // This is a round rect nested inside a rect. 45 SkPath drawPath; 46 drawPath.moveTo(823.f, 653.f); 47 drawPath.lineTo(1043.f, 653.f); 48 drawPath.lineTo(1043.f, 733.f); 49 drawPath.lineTo(823.f, 733.f); 50 drawPath.lineTo(823.f, 653.f); 51 drawPath.close(); 52 drawPath.moveTo(832.f, 654.f); 53 drawPath.lineTo(1034.f, 654.f); 54 drawPath.cubicTo(1038.4183f, 654.f, 1042.f, 657.58173f, 1042.f, 662.f); 55 drawPath.lineTo(1042.f, 724.f); 56 drawPath.cubicTo(1042.f, 728.41827f, 1038.4183f, 732.f, 1034.f, 732.f); 57 drawPath.lineTo(832.f, 732.f); 58 drawPath.cubicTo(827.58173f, 732.f, 824.f, 728.41827f, 824.f, 724.f); 59 drawPath.lineTo(824.f, 662.f); 60 drawPath.cubicTo(824.f, 657.58173f, 827.58173f, 654.f, 832.f, 654.f); 61 drawPath.close(); 62 drawPath.setFillType(SkPathFillType::kEvenOdd); 63 64 SkPaint paint; 65 paint.setAntiAlias(true); 66 paint.setColor(0xFF000000); 67 paint.setMaskFilter( 68 SkMaskFilter::MakeBlur(kNormal_SkBlurStyle, 0.78867501f)); 69 paint.setColorFilter(SkColorFilters::Blend(0xBFFFFFFF, SkBlendMode::kSrcIn)); 70 71 canvas->clipPath(clipPath, true); 72 canvas->drawPath(drawPath, paint); 73 } 74