/* * Copyright 2014 Google Inc. * * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #include "include/core/SkCanvas.h" #include "include/core/SkImageInfo.h" #include "include/core/SkMatrix.h" #include "include/core/SkPaint.h" #include "include/core/SkPath.h" #include "include/core/SkPathEffect.h" #include "include/core/SkPoint.h" #include "include/core/SkRect.h" #include "include/core/SkRefCnt.h" #include "include/core/SkScalar.h" #include "include/core/SkStrokeRec.h" #include "include/core/SkSurface.h" #include "include/core/SkTypes.h" #include "include/effects/SkDashPathEffect.h" #include "tests/Test.h" // crbug.com/348821 was rooted in SkDashPathEffect refusing to flatten and unflatten itself when // the effect is nonsense. Here we test that it fails when passed nonsense parameters. DEF_TEST(DashPathEffectTest_crbug_348821, r) { SkScalar intervals[] = { 1.76934361e+36f, 2.80259693e-45f }; // Values from bug. const int count = 2; SkScalar phase = SK_ScalarInfinity; // Used to force a nonsense effect. sk_sp<SkPathEffect> dash(SkDashPathEffect::Make(intervals, count, phase)); REPORTER_ASSERT(r, dash == nullptr); } // Test out the asPoint culling behavior. DEF_TEST(DashPathEffectTest_asPoints, r) { const SkScalar intervals[] = { 1.0f, 1.0f }; const int count = 2; sk_sp<SkPathEffect> dash(SkDashPathEffect::Make(intervals, count, 0.0f)); SkRect cull = SkRect::MakeWH(1.0f, 1.0f); const struct { SkPoint fPts[2]; bool fExpectedResult; } testCases[] = { { { { -5.0f, 0.5f }, { -4.0f, 0.5f } }, false }, // off to the left { { { 4.0f, 0.5f }, { 5.0f, 0.5f } }, false }, // off to the right { { { 0.5f, 4.0f }, { 0.5f, 5.0f } }, false }, // off the bottom { { { 0.5f, -5.0f }, { 0.5f, -4.0f } }, false }, // off the top { { { 0.5f, 0.2f }, { 0.5f, 0.8f } }, true }, // entirely inside vertical { { { 0.2f, 0.5f }, { 0.8f, 0.5f } }, true }, // entirely inside horizontal { { { 0.5f, -5.0f }, { 0.5f, 5.0f } }, true }, // straddles both sides vertically { { { -5.0f, 0.5f }, { 5.0f, 0.5f } }, true }, // straddles both sides horizontally { { { 0.5f, -5.0f }, { 0.5f, 0.5f } }, true }, // straddles top { { { 0.5f, 5.0f }, { 0.5f, 0.5f } }, true }, // straddles bottom { { { -5.0f, 0.5f }, { 0.5f, 0.5f } }, true }, // straddles left { { { 5.0f, 0.5f }, { 0.5f, 0.5f } }, true }, // straddles right { { { 0.5f, 0.5f }, { 0.5f, 0.5f } }, false }, // zero length }; SkPaint paint; paint.setStyle(SkPaint::kStroke_Style); paint.setStrokeWidth(1.0f); SkStrokeRec rec(paint); static const int kNumMats = 3; SkMatrix mats[kNumMats]; mats[0].reset(); mats[1].setRotate(90, 0.5f, 0.5f); mats[2].setTranslate(10.0f, 10.0f); for (int i = 0; i < kNumMats; ++i) { for (int j = 0; j < (int)SK_ARRAY_COUNT(testCases); ++j) { for (int k = 0; k < 2; ++k) { // exercise alternating endpoints SkPathEffect::PointData results; SkPath src; src.moveTo(testCases[j].fPts[k]); src.lineTo(testCases[j].fPts[(k+1)%2]); bool actualResult = dash->asPoints(&results, src, rec, mats[i], &cull); if (i < 2) { REPORTER_ASSERT(r, actualResult == testCases[j].fExpectedResult); } else { // On the third pass all the lines should be outside the translated cull rect REPORTER_ASSERT(r, !actualResult); } } } } } DEF_TEST(DashPath_bug4871, r) { SkPath path; path.moveTo(30, 24); path.cubicTo(30.002f, 24, 30, 24, 30, 24); path.close(); SkScalar intervals[2] = { 1, 1 }; sk_sp<SkPathEffect> dash(SkDashPathEffect::Make(intervals, 2, 0)); SkPaint paint; paint.setStyle(SkPaint::kStroke_Style); paint.setPathEffect(dash); SkPath fill; paint.getFillPath(path, &fill); } // Verify that long lines with many dashes don't cause overflows/OOMs. DEF_TEST(DashPathEffectTest_asPoints_limit, r) { sk_sp<SkSurface> surface(SkSurface::MakeRaster(SkImageInfo::MakeN32Premul(256, 256))); SkCanvas* canvas = surface->getCanvas(); SkPaint p; p.setStyle(SkPaint::kStroke_Style); // force the bounds to outset by a large amount p.setStrokeWidth(5.0e10f); const SkScalar intervals[] = { 1, 1 }; p.setPathEffect(SkDashPathEffect::Make(intervals, SK_ARRAY_COUNT(intervals), 0)); canvas->drawLine(1, 1, 1, 5.0e10f, p); } // This used to cause SkDashImpl to walk off the end of the intervals array, due to underflow // trying to substract a smal value from a large one in floats. DEF_TEST(DashCrazy_crbug_875494, r) { SkScalar vals[] = { 98, 94, 2888458849.f, 227, 0, 197 }; const int N = SK_ARRAY_COUNT(vals); SkRect cull = SkRect::MakeXYWH(43,236,57,149); SkPath path; path.addRect(cull); SkPath path2; SkPaint paint; paint.setStyle(SkPaint::kStroke_Style); paint.setPathEffect(SkDashPathEffect::Make(vals, N, 222)); paint.getFillPath(path, &path2, &cull); }