xref: /aosp_15_r20/external/skia/tests/DashPathEffectTest.cpp (revision c8dee2aa9b3f27cf6c858bd81872bdeb2c07ed17)
1*c8dee2aaSAndroid Build Coastguard Worker /*
2*c8dee2aaSAndroid Build Coastguard Worker  * Copyright 2014 Google Inc.
3*c8dee2aaSAndroid Build Coastguard Worker  *
4*c8dee2aaSAndroid Build Coastguard Worker  * Use of this source code is governed by a BSD-style license that can be
5*c8dee2aaSAndroid Build Coastguard Worker  * found in the LICENSE file.
6*c8dee2aaSAndroid Build Coastguard Worker  */
7*c8dee2aaSAndroid Build Coastguard Worker 
8*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkCanvas.h"
9*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkImageInfo.h"
10*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkMatrix.h"
11*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkPaint.h"
12*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkPath.h"
13*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkPathEffect.h"
14*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkPathUtils.h"
15*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkPoint.h"
16*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkRect.h"
17*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkRefCnt.h"
18*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkScalar.h"
19*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkStrokeRec.h"
20*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkSurface.h"
21*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkTypes.h"
22*c8dee2aaSAndroid Build Coastguard Worker #include "include/effects/SkDashPathEffect.h"
23*c8dee2aaSAndroid Build Coastguard Worker #include "src/core/SkPathEffectBase.h"
24*c8dee2aaSAndroid Build Coastguard Worker #include "tests/Test.h"
25*c8dee2aaSAndroid Build Coastguard Worker 
26*c8dee2aaSAndroid Build Coastguard Worker #include <array>
27*c8dee2aaSAndroid Build Coastguard Worker 
28*c8dee2aaSAndroid Build Coastguard Worker // crbug.com/348821 was rooted in SkDashPathEffect refusing to flatten and unflatten itself when
29*c8dee2aaSAndroid Build Coastguard Worker // the effect is nonsense.  Here we test that it fails when passed nonsense parameters.
30*c8dee2aaSAndroid Build Coastguard Worker 
DEF_TEST(DashPathEffectTest_crbug_348821,r)31*c8dee2aaSAndroid Build Coastguard Worker DEF_TEST(DashPathEffectTest_crbug_348821, r) {
32*c8dee2aaSAndroid Build Coastguard Worker     SkScalar intervals[] = { 1.76934361e+36f, 2.80259693e-45f };  // Values from bug.
33*c8dee2aaSAndroid Build Coastguard Worker     const int count = 2;
34*c8dee2aaSAndroid Build Coastguard Worker     SkScalar phase = SK_ScalarInfinity;  // Used to force a nonsense effect.
35*c8dee2aaSAndroid Build Coastguard Worker     sk_sp<SkPathEffect> dash(SkDashPathEffect::Make(intervals, count, phase));
36*c8dee2aaSAndroid Build Coastguard Worker 
37*c8dee2aaSAndroid Build Coastguard Worker     REPORTER_ASSERT(r, dash == nullptr);
38*c8dee2aaSAndroid Build Coastguard Worker }
39*c8dee2aaSAndroid Build Coastguard Worker 
40*c8dee2aaSAndroid Build Coastguard Worker // Test out the asPoint culling behavior.
DEF_TEST(DashPathEffectTest_asPoints,r)41*c8dee2aaSAndroid Build Coastguard Worker DEF_TEST(DashPathEffectTest_asPoints, r) {
42*c8dee2aaSAndroid Build Coastguard Worker 
43*c8dee2aaSAndroid Build Coastguard Worker     const SkScalar intervals[] = { 1.0f, 1.0f };
44*c8dee2aaSAndroid Build Coastguard Worker     const int count = 2;
45*c8dee2aaSAndroid Build Coastguard Worker     sk_sp<SkPathEffect> dash(SkDashPathEffect::Make(intervals, count, 0.0f));
46*c8dee2aaSAndroid Build Coastguard Worker 
47*c8dee2aaSAndroid Build Coastguard Worker     SkRect cull = SkRect::MakeWH(1.0f, 1.0f);
48*c8dee2aaSAndroid Build Coastguard Worker 
49*c8dee2aaSAndroid Build Coastguard Worker     const struct {
50*c8dee2aaSAndroid Build Coastguard Worker         SkPoint fPts[2];
51*c8dee2aaSAndroid Build Coastguard Worker         bool    fExpectedResult;
52*c8dee2aaSAndroid Build Coastguard Worker     } testCases[] = {
53*c8dee2aaSAndroid Build Coastguard Worker         { { { -5.0f,  0.5f }, { -4.0f,  0.5f } }, false },   // off to the left
54*c8dee2aaSAndroid Build Coastguard Worker         { { {  4.0f,  0.5f }, {  5.0f,  0.5f } }, false },   // off to the right
55*c8dee2aaSAndroid Build Coastguard Worker         { { {  0.5f,  4.0f }, {  0.5f,  5.0f } }, false },   // off the bottom
56*c8dee2aaSAndroid Build Coastguard Worker         { { {  0.5f, -5.0f }, {  0.5f, -4.0f } }, false },   // off the top
57*c8dee2aaSAndroid Build Coastguard Worker         { { {  0.5f,  0.2f }, {  0.5f,  0.8f } }, true  },   // entirely inside vertical
58*c8dee2aaSAndroid Build Coastguard Worker         { { {  0.2f,  0.5f }, {  0.8f,  0.5f } }, true  },   // entirely inside horizontal
59*c8dee2aaSAndroid Build Coastguard Worker         { { {  0.5f, -5.0f }, {  0.5f,  5.0f } }, true  },   // straddles both sides vertically
60*c8dee2aaSAndroid Build Coastguard Worker         { { { -5.0f,  0.5f }, {  5.0f,  0.5f } }, true  },   // straddles both sides horizontally
61*c8dee2aaSAndroid Build Coastguard Worker         { { {  0.5f, -5.0f }, {  0.5f,  0.5f } }, true  },   // straddles top
62*c8dee2aaSAndroid Build Coastguard Worker         { { {  0.5f,  5.0f }, {  0.5f,  0.5f } }, true  },   // straddles bottom
63*c8dee2aaSAndroid Build Coastguard Worker         { { { -5.0f,  0.5f }, {  0.5f,  0.5f } }, true  },   // straddles left
64*c8dee2aaSAndroid Build Coastguard Worker         { { {  5.0f,  0.5f }, {  0.5f,  0.5f } }, true  },   // straddles right
65*c8dee2aaSAndroid Build Coastguard Worker         { { {  0.5f,  0.5f }, {  0.5f,  0.5f } }, false },   // zero length
66*c8dee2aaSAndroid Build Coastguard Worker     };
67*c8dee2aaSAndroid Build Coastguard Worker 
68*c8dee2aaSAndroid Build Coastguard Worker     SkPaint paint;
69*c8dee2aaSAndroid Build Coastguard Worker     paint.setStyle(SkPaint::kStroke_Style);
70*c8dee2aaSAndroid Build Coastguard Worker     paint.setStrokeWidth(1.0f);
71*c8dee2aaSAndroid Build Coastguard Worker     SkStrokeRec rec(paint);
72*c8dee2aaSAndroid Build Coastguard Worker 
73*c8dee2aaSAndroid Build Coastguard Worker     static const int kNumMats = 3;
74*c8dee2aaSAndroid Build Coastguard Worker     SkMatrix mats[kNumMats];
75*c8dee2aaSAndroid Build Coastguard Worker     mats[0].reset();
76*c8dee2aaSAndroid Build Coastguard Worker     mats[1].setRotate(90, 0.5f, 0.5f);
77*c8dee2aaSAndroid Build Coastguard Worker     mats[2].setTranslate(10.0f, 10.0f);
78*c8dee2aaSAndroid Build Coastguard Worker 
79*c8dee2aaSAndroid Build Coastguard Worker     for (int i = 0; i < kNumMats; ++i) {
80*c8dee2aaSAndroid Build Coastguard Worker         for (int j = 0; j < (int)std::size(testCases); ++j) {
81*c8dee2aaSAndroid Build Coastguard Worker             for (int k = 0; k < 2; ++k) {  // exercise alternating endpoints
82*c8dee2aaSAndroid Build Coastguard Worker                 SkPathEffectBase::PointData results;
83*c8dee2aaSAndroid Build Coastguard Worker                 SkPath src;
84*c8dee2aaSAndroid Build Coastguard Worker 
85*c8dee2aaSAndroid Build Coastguard Worker                 src.moveTo(testCases[j].fPts[k]);
86*c8dee2aaSAndroid Build Coastguard Worker                 src.lineTo(testCases[j].fPts[(k+1)%2]);
87*c8dee2aaSAndroid Build Coastguard Worker 
88*c8dee2aaSAndroid Build Coastguard Worker                 bool actualResult = as_PEB(dash)->asPoints(&results, src, rec, mats[i], &cull);
89*c8dee2aaSAndroid Build Coastguard Worker                 if (i < 2) {
90*c8dee2aaSAndroid Build Coastguard Worker                     REPORTER_ASSERT(r, actualResult == testCases[j].fExpectedResult);
91*c8dee2aaSAndroid Build Coastguard Worker                 } else {
92*c8dee2aaSAndroid Build Coastguard Worker                     // On the third pass all the lines should be outside the translated cull rect
93*c8dee2aaSAndroid Build Coastguard Worker                     REPORTER_ASSERT(r, !actualResult);
94*c8dee2aaSAndroid Build Coastguard Worker                 }
95*c8dee2aaSAndroid Build Coastguard Worker             }
96*c8dee2aaSAndroid Build Coastguard Worker         }
97*c8dee2aaSAndroid Build Coastguard Worker     }
98*c8dee2aaSAndroid Build Coastguard Worker }
99*c8dee2aaSAndroid Build Coastguard Worker 
DEF_TEST(DashPath_bug4871,r)100*c8dee2aaSAndroid Build Coastguard Worker DEF_TEST(DashPath_bug4871, r) {
101*c8dee2aaSAndroid Build Coastguard Worker     SkPath path;
102*c8dee2aaSAndroid Build Coastguard Worker     path.moveTo(30, 24);
103*c8dee2aaSAndroid Build Coastguard Worker     path.cubicTo(30.002f, 24, 30, 24, 30, 24);
104*c8dee2aaSAndroid Build Coastguard Worker     path.close();
105*c8dee2aaSAndroid Build Coastguard Worker 
106*c8dee2aaSAndroid Build Coastguard Worker     SkScalar intervals[2] = { 1, 1 };
107*c8dee2aaSAndroid Build Coastguard Worker     sk_sp<SkPathEffect> dash(SkDashPathEffect::Make(intervals, 2, 0));
108*c8dee2aaSAndroid Build Coastguard Worker 
109*c8dee2aaSAndroid Build Coastguard Worker     SkPaint paint;
110*c8dee2aaSAndroid Build Coastguard Worker     paint.setStyle(SkPaint::kStroke_Style);
111*c8dee2aaSAndroid Build Coastguard Worker     paint.setPathEffect(dash);
112*c8dee2aaSAndroid Build Coastguard Worker 
113*c8dee2aaSAndroid Build Coastguard Worker     SkPath fill;
114*c8dee2aaSAndroid Build Coastguard Worker     skpathutils::FillPathWithPaint(path, paint, &fill);
115*c8dee2aaSAndroid Build Coastguard Worker }
116*c8dee2aaSAndroid Build Coastguard Worker 
117*c8dee2aaSAndroid Build Coastguard Worker // Verify that long lines with many dashes don't cause overflows/OOMs.
DEF_TEST(DashPathEffectTest_asPoints_limit,r)118*c8dee2aaSAndroid Build Coastguard Worker DEF_TEST(DashPathEffectTest_asPoints_limit, r) {
119*c8dee2aaSAndroid Build Coastguard Worker     sk_sp<SkSurface> surface(SkSurfaces::Raster(SkImageInfo::MakeN32Premul(256, 256)));
120*c8dee2aaSAndroid Build Coastguard Worker     SkCanvas* canvas = surface->getCanvas();
121*c8dee2aaSAndroid Build Coastguard Worker 
122*c8dee2aaSAndroid Build Coastguard Worker     SkPaint p;
123*c8dee2aaSAndroid Build Coastguard Worker     p.setStyle(SkPaint::kStroke_Style);
124*c8dee2aaSAndroid Build Coastguard Worker     // force the bounds to outset by a large amount
125*c8dee2aaSAndroid Build Coastguard Worker     p.setStrokeWidth(5.0e10f);
126*c8dee2aaSAndroid Build Coastguard Worker     const SkScalar intervals[] = { 1, 1 };
127*c8dee2aaSAndroid Build Coastguard Worker     p.setPathEffect(SkDashPathEffect::Make(intervals, std::size(intervals), 0));
128*c8dee2aaSAndroid Build Coastguard Worker     canvas->drawLine(1, 1, 1, 5.0e10f, p);
129*c8dee2aaSAndroid Build Coastguard Worker }
130*c8dee2aaSAndroid Build Coastguard Worker 
131*c8dee2aaSAndroid Build Coastguard Worker // This used to cause SkDashImpl to walk off the end of the intervals array, due to underflow
132*c8dee2aaSAndroid Build Coastguard Worker // trying to substract a smal value from a large one in floats.
DEF_TEST(DashCrazy_crbug_875494,r)133*c8dee2aaSAndroid Build Coastguard Worker DEF_TEST(DashCrazy_crbug_875494, r) {
134*c8dee2aaSAndroid Build Coastguard Worker     SkScalar vals[] = { 98, 94, 2888458849.f, 227, 0, 197 };
135*c8dee2aaSAndroid Build Coastguard Worker     const int N = std::size(vals);
136*c8dee2aaSAndroid Build Coastguard Worker 
137*c8dee2aaSAndroid Build Coastguard Worker     SkRect cull = SkRect::MakeXYWH(43,236,57,149);
138*c8dee2aaSAndroid Build Coastguard Worker     SkPath path;
139*c8dee2aaSAndroid Build Coastguard Worker     path.addRect(cull);
140*c8dee2aaSAndroid Build Coastguard Worker 
141*c8dee2aaSAndroid Build Coastguard Worker     SkPath path2;
142*c8dee2aaSAndroid Build Coastguard Worker     SkPaint paint;
143*c8dee2aaSAndroid Build Coastguard Worker     paint.setStyle(SkPaint::kStroke_Style);
144*c8dee2aaSAndroid Build Coastguard Worker     paint.setPathEffect(SkDashPathEffect::Make(vals, N, 222));
145*c8dee2aaSAndroid Build Coastguard Worker     skpathutils::FillPathWithPaint(path, paint, &path2, &cull);
146*c8dee2aaSAndroid Build Coastguard Worker }
147*c8dee2aaSAndroid Build Coastguard Worker 
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