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- /*
- * 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);
- }
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