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