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 14 // crbug.com/348821 was rooted in SkDashPathEffect refusing to flatten and unflatten itself when 15 // fInitialDashLength < 0 (a signal the effect is nonsense). Here we test that it flattens. 16 17 DEF_TEST(DashPathEffectTest_crbug_348821, r) { 18 SkScalar intervals[] = { 1.76934361e+36f, 2.80259693e-45f }; // Values from bug. 19 const int count = 2; 20 SkScalar phase = SK_ScalarInfinity; // Used to force the bad fInitialDashLength = -1 path. 21 SkAutoTUnref<SkPathEffect> dash(SkDashPathEffect::Create(intervals, count, phase)); 22 23 // nullptr -> refuses to work with flattening framework. 24 REPORTER_ASSERT(r, dash->getFactory() != nullptr); 25 26 SkWriteBuffer buffer; 27 buffer.writeFlattenable(dash); 28 REPORTER_ASSERT(r, buffer.bytesWritten() > 12); // We'd write 12 if broken, >=40 if not. 29 } 30 31 // Test out the asPoint culling behavior. 32 DEF_TEST(DashPathEffectTest_asPoints, r) { 33 34 const SkScalar intervals[] = { 1.0f, 1.0f }; 35 const int count = 2; 36 SkAutoTUnref<SkPathEffect> dash(SkDashPathEffect::Create(intervals, count, 0.0f)); 37 38 SkRect cull = SkRect::MakeWH(1.0f, 1.0f); 39 40 const struct { 41 SkPoint fPts[2]; 42 bool fExpectedResult; 43 } testCases[] = { 44 { { { -5.0f, 0.5f }, { -4.0f, 0.5f } }, false }, // off to the left 45 { { { 4.0f, 0.5f }, { 5.0f, 0.5f } }, false }, // off to the right 46 { { { 0.5f, 4.0f }, { 0.5f, 5.0f } }, false }, // off the bottom 47 { { { 0.5f, -5.0f }, { 0.5f, -4.0f } }, false }, // off the top 48 { { { 0.5f, 0.2f }, { 0.5f, 0.8f } }, true }, // entirely inside vertical 49 { { { 0.2f, 0.5f }, { 0.8f, 0.5f } }, true }, // entirely inside horizontal 50 { { { 0.5f, -5.0f }, { 0.5f, 5.0f } }, true }, // straddles both sides vertically 51 { { { -5.0f, 0.5f }, { 5.0f, 0.5f } }, true }, // straddles both sides horizontally 52 { { { 0.5f, -5.0f }, { 0.5f, 0.5f } }, true }, // straddles top 53 { { { 0.5f, 5.0f }, { 0.5f, 0.5f } }, true }, // straddles bottom 54 { { { -5.0f, 0.5f }, { 0.5f, 0.5f } }, true }, // straddles left 55 { { { 5.0f, 0.5f }, { 0.5f, 0.5f } }, true }, // straddles right 56 { { { 0.5f, 0.5f }, { 0.5f, 0.5f } }, false }, // zero length 57 }; 58 59 SkPaint paint; 60 paint.setStyle(SkPaint::kStroke_Style); 61 paint.setStrokeWidth(1.0f); 62 SkStrokeRec rec(paint); 63 64 static const int kNumMats = 3; 65 SkMatrix mats[kNumMats]; 66 mats[0].reset(); 67 mats[1].setRotate(90, 0.5f, 0.5f); 68 mats[2].setTranslate(10.0f, 10.0f); 69 70 for (int i = 0; i < kNumMats; ++i) { 71 for (int j = 0; j < (int)SK_ARRAY_COUNT(testCases); ++j) { 72 for (int k = 0; k < 2; ++k) { // exercise alternating endpoints 73 SkPathEffect::PointData results; 74 SkPath src; 75 76 src.moveTo(testCases[j].fPts[k]); 77 src.lineTo(testCases[j].fPts[(k+1)%2]); 78 79 bool actualResult = dash->asPoints(&results, src, rec, mats[i], &cull); 80 if (i < 2) { 81 REPORTER_ASSERT(r, actualResult == testCases[j].fExpectedResult); 82 } else { 83 // On the third pass all the lines should be outside the translated cull rect 84 REPORTER_ASSERT(r, !actualResult); 85 } 86 } 87 } 88 } 89 } 90 91 DEF_TEST(DashPath_bug4871, r) { 92 SkPath path; 93 path.moveTo(30, 24); 94 path.cubicTo(30.002f, 24, 30, 24, 30, 24); 95 path.close(); 96 97 SkScalar intervals[2] = { 1, 1 }; 98 SkAutoTUnref<SkPathEffect> dash(SkDashPathEffect::Create(intervals, 2, 0)); 99 100 SkPaint paint; 101 paint.setStyle(SkPaint::kStroke_Style); 102 paint.setPathEffect(dash); 103 104 SkPath fill; 105 paint.getFillPath(path, &fill); 106 } 107
