1 /* 2 * Copyright 2014 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 "Test.h" 9 10 #include "SkDashPathEffect.h" 11 #include "SkWriteBuffer.h" 12 #include "SkStrokeRec.h" 13 #include "SkCanvas.h" 14 #include "SkSurface.h" 15 16 // crbug.com/348821 was rooted in SkDashPathEffect refusing to flatten and unflatten itself when 17 // the effect is nonsense. Here we test that it fails when passed nonsense parameters. 18 19 DEF_TEST(DashPathEffectTest_crbug_348821, r) { 20 SkScalar intervals[] = { 1.76934361e+36f, 2.80259693e-45f }; // Values from bug. 21 const int count = 2; 22 SkScalar phase = SK_ScalarInfinity; // Used to force a nonsense effect. 23 sk_sp<SkPathEffect> dash(SkDashPathEffect::Make(intervals, count, phase)); 24 25 REPORTER_ASSERT(r, dash == nullptr); 26 } 27 28 // Test out the asPoint culling behavior. 29 DEF_TEST(DashPathEffectTest_asPoints, r) { 30 31 const SkScalar intervals[] = { 1.0f, 1.0f }; 32 const int count = 2; 33 sk_sp<SkPathEffect> dash(SkDashPathEffect::Make(intervals, count, 0.0f)); 34 35 SkRect cull = SkRect::MakeWH(1.0f, 1.0f); 36 37 const struct { 38 SkPoint fPts[2]; 39 bool fExpectedResult; 40 } testCases[] = { 41 { { { -5.0f, 0.5f }, { -4.0f, 0.5f } }, false }, // off to the left 42 { { { 4.0f, 0.5f }, { 5.0f, 0.5f } }, false }, // off to the right 43 { { { 0.5f, 4.0f }, { 0.5f, 5.0f } }, false }, // off the bottom 44 { { { 0.5f, -5.0f }, { 0.5f, -4.0f } }, false }, // off the top 45 { { { 0.5f, 0.2f }, { 0.5f, 0.8f } }, true }, // entirely inside vertical 46 { { { 0.2f, 0.5f }, { 0.8f, 0.5f } }, true }, // entirely inside horizontal 47 { { { 0.5f, -5.0f }, { 0.5f, 5.0f } }, true }, // straddles both sides vertically 48 { { { -5.0f, 0.5f }, { 5.0f, 0.5f } }, true }, // straddles both sides horizontally 49 { { { 0.5f, -5.0f }, { 0.5f, 0.5f } }, true }, // straddles top 50 { { { 0.5f, 5.0f }, { 0.5f, 0.5f } }, true }, // straddles bottom 51 { { { -5.0f, 0.5f }, { 0.5f, 0.5f } }, true }, // straddles left 52 { { { 5.0f, 0.5f }, { 0.5f, 0.5f } }, true }, // straddles right 53 { { { 0.5f, 0.5f }, { 0.5f, 0.5f } }, false }, // zero length 54 }; 55 56 SkPaint paint; 57 paint.setStyle(SkPaint::kStroke_Style); 58 paint.setStrokeWidth(1.0f); 59 SkStrokeRec rec(paint); 60 61 static const int kNumMats = 3; 62 SkMatrix mats[kNumMats]; 63 mats[0].reset(); 64 mats[1].setRotate(90, 0.5f, 0.5f); 65 mats[2].setTranslate(10.0f, 10.0f); 66 67 for (int i = 0; i < kNumMats; ++i) { 68 for (int j = 0; j < (int)SK_ARRAY_COUNT(testCases); ++j) { 69 for (int k = 0; k < 2; ++k) { // exercise alternating endpoints 70 SkPathEffect::PointData results; 71 SkPath src; 72 73 src.moveTo(testCases[j].fPts[k]); 74 src.lineTo(testCases[j].fPts[(k+1)%2]); 75 76 bool actualResult = dash->asPoints(&results, src, rec, mats[i], &cull); 77 if (i < 2) { 78 REPORTER_ASSERT(r, actualResult == testCases[j].fExpectedResult); 79 } else { 80 // On the third pass all the lines should be outside the translated cull rect 81 REPORTER_ASSERT(r, !actualResult); 82 } 83 } 84 } 85 } 86 } 87 88 DEF_TEST(DashPath_bug4871, r) { 89 SkPath path; 90 path.moveTo(30, 24); 91 path.cubicTo(30.002f, 24, 30, 24, 30, 24); 92 path.close(); 93 94 SkScalar intervals[2] = { 1, 1 }; 95 sk_sp<SkPathEffect> dash(SkDashPathEffect::Make(intervals, 2, 0)); 96 97 SkPaint paint; 98 paint.setStyle(SkPaint::kStroke_Style); 99 paint.setPathEffect(dash); 100 101 SkPath fill; 102 paint.getFillPath(path, &fill); 103 } 104 105 // Verify that long lines with many dashes don't cause overflows/OOMs. 106 DEF_TEST(DashPathEffectTest_asPoints_limit, r) { 107 sk_sp<SkSurface> surface(SkSurface::MakeRaster(SkImageInfo::MakeN32Premul(256, 256))); 108 SkCanvas* canvas = surface->getCanvas(); 109 110 SkPaint p; 111 p.setStyle(SkPaint::kStroke_Style); 112 // force the bounds to outset by a large amount 113 p.setStrokeWidth(5.0e10f); 114 const SkScalar intervals[] = { 1, 1 }; 115 p.setPathEffect(SkDashPathEffect::Make(intervals, SK_ARRAY_COUNT(intervals), 0)); 116 canvas->drawLine(1, 1, 1, 5.0e10f, p); 117 } 118
