1 /*
2 * Copyright 2012 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 #include "SkBitmap.h"
10 #include "SkCanvas.h"
11 #include "SkDashPathEffect.h"
12
create(SkBitmap::Config config,int w,int h,int rb,void * addr=NULL)13 static SkCanvas* create(SkBitmap::Config config, int w, int h, int rb,
14 void* addr = NULL) {
15 SkBitmap bm;
16 bm.setConfig(config, w, h, rb);
17 if (addr) {
18 bm.setPixels(addr);
19 } else {
20 bm.allocPixels();
21 }
22 return new SkCanvas(bm);
23 }
24
new_canvas(int w,int h)25 static SkCanvas* new_canvas(int w, int h) {
26 return create(SkBitmap::kARGB_8888_Config, w, h, 0, NULL);
27 }
28
29 ///////////////////////////////////////////////////////////////////////////////
30
moveToH(SkPath * path,const uint32_t raw[])31 static void moveToH(SkPath* path, const uint32_t raw[]) {
32 const float* fptr = (const float*)raw;
33 path->moveTo(fptr[0], fptr[1]);
34 }
35
cubicToH(SkPath * path,const uint32_t raw[])36 static void cubicToH(SkPath* path, const uint32_t raw[]) {
37 const float* fptr = (const float*)raw;
38 path->cubicTo(fptr[0], fptr[1], fptr[2], fptr[3], fptr[4], fptr[5]);
39 }
40
41 // This used to assert, because we performed a cast (int)(pt[0].fX * scale) to
42 // arrive at an int (SkFDot6) rather than calling sk_float_round2int. The assert
43 // was that the initial line-segment produced by the cubic was not monotonically
44 // going down (i.e. the initial DY was negative). By rounding the floats, we get
45 // the more proper result.
46 //
47 // http://code.google.com/p/chromium/issues/detail?id=131181
48 //
49
50 // we're not calling this test anymore; is that for a reason?
51
test_crbug131181(skiatest::Reporter *)52 static void test_crbug131181(skiatest::Reporter*) {
53 /*
54 fX = 18.8943768,
55 fY = 129.121277
56 }, {
57 fX = 18.8937435,
58 fY = 129.121689
59 }, {
60 fX = 18.8950119,
61 fY = 129.120422
62 }, {
63 fX = 18.5030727,
64 fY = 129.13121
65 */
66 uint32_t data[] = {
67 0x419727af, 0x43011f0c, 0x41972663, 0x43011f27,
68 0x419728fc, 0x43011ed4, 0x4194064b, 0x43012197
69 };
70
71 SkPath path;
72 moveToH(&path, &data[0]);
73 cubicToH(&path, &data[2]);
74
75 SkAutoTUnref<SkCanvas> canvas(new_canvas(640, 480));
76
77 SkPaint paint;
78 paint.setAntiAlias(true);
79 canvas->drawPath(path, paint);
80 }
81
82 // This used to assert in debug builds (and crash writing bad memory in release)
83 // because we overflowed an intermediate value (B coefficient) setting up our
84 // stepper for the quadratic. Now we bias that value by 1/2 so we don't overflow
test_crbug_140803(skiatest::Reporter * reporter)85 static void test_crbug_140803(skiatest::Reporter* reporter) {
86 SkBitmap bm;
87 bm.setConfig(SkBitmap::kARGB_8888_Config, 2700, 30*1024);
88 bm.allocPixels();
89 SkCanvas canvas(bm);
90
91 SkPath path;
92 path.moveTo(2762, 20);
93 path.quadTo(11, 21702, 10, 21706);
94 SkPaint paint;
95 paint.setAntiAlias(true);
96 canvas.drawPath(path, paint);
97 }
98
99 // Need to exercise drawing an inverse-path whose bounds intersect the clip,
100 // but whose edges do not (since its a quad which draws only in the bottom half
101 // of its bounds).
102 // In the debug build, we used to assert in this case, until it was fixed.
103 //
test_inversepathwithclip(skiatest::Reporter * reporter)104 static void test_inversepathwithclip(skiatest::Reporter* reporter) {
105 SkPath path;
106
107 path.moveTo(0, SkIntToScalar(20));
108 path.quadTo(SkIntToScalar(10), SkIntToScalar(10),
109 SkIntToScalar(20), SkIntToScalar(20));
110 path.toggleInverseFillType();
111
112 SkPaint paint;
113
114 SkAutoTUnref<SkCanvas> canvas(new_canvas(640, 480));
115 canvas.get()->save();
116 canvas.get()->clipRect(SkRect::MakeWH(SkIntToScalar(19), SkIntToScalar(11)));
117
118 paint.setAntiAlias(false);
119 canvas.get()->drawPath(path, paint);
120 paint.setAntiAlias(true);
121 canvas.get()->drawPath(path, paint);
122
123 canvas.get()->restore();
124
125 // Now do the test again, with the path flipped, so we only draw in the
126 // top half of our bounds, and have the clip intersect our bounds at the
127 // bottom.
128 path.reset(); // preserves our filltype
129 path.moveTo(0, SkIntToScalar(10));
130 path.quadTo(SkIntToScalar(10), SkIntToScalar(20),
131 SkIntToScalar(20), SkIntToScalar(10));
132 canvas.get()->clipRect(SkRect::MakeXYWH(SkIntToScalar(0), SkIntToScalar(19),
133 SkIntToScalar(19), SkIntToScalar(11)));
134
135 paint.setAntiAlias(false);
136 canvas.get()->drawPath(path, paint);
137 paint.setAntiAlias(true);
138 canvas.get()->drawPath(path, paint);
139 }
140
test_bug533(skiatest::Reporter * reporter)141 static void test_bug533(skiatest::Reporter* reporter) {
142 #ifdef SK_SCALAR_IS_FLOAT
143 /*
144 http://code.google.com/p/skia/issues/detail?id=533
145 This particular test/bug only applies to the float case, where the
146 coordinates are very large.
147 */
148 SkPath path;
149 path.moveTo(64, 3);
150 path.quadTo(-329936, -100000000, 1153, 330003);
151
152 SkPaint paint;
153 paint.setAntiAlias(true);
154
155 SkAutoTUnref<SkCanvas> canvas(new_canvas(640, 480));
156 canvas.get()->drawPath(path, paint);
157 #endif
158 }
159
test_crbug_140642(skiatest::Reporter * reporter)160 static void test_crbug_140642(skiatest::Reporter* reporter) {
161 /*
162 * We used to see this construct, and due to rounding as we accumulated
163 * our length, the loop where we apply the phase would run off the end of
164 * the array, since it relied on just -= each interval value, which did not
165 * behave as "expected". Now the code explicitly checks for walking off the
166 * end of that array.
167
168 * A different (better) fix might be to rewrite dashing to do all of its
169 * length/phase/measure math using double, but this may need to be
170 * coordinated with SkPathMeasure, to be consistent between the two.
171
172 <path stroke="mintcream" stroke-dasharray="27734 35660 2157846850 247"
173 stroke-dashoffset="-248.135982067">
174 */
175
176 #ifdef SK_SCALAR_IS_FLOAT
177 const SkScalar vals[] = { 27734, 35660, 2157846850.0f, 247 };
178 SkDashPathEffect dontAssert(vals, 4, -248.135982067f);
179 #endif
180 }
181
test_crbug_124652(skiatest::Reporter * reporter)182 static void test_crbug_124652(skiatest::Reporter* reporter) {
183 #ifdef SK_SCALAR_IS_FLOAT
184 /*
185 http://code.google.com/p/chromium/issues/detail?id=124652
186 This particular test/bug only applies to the float case, where
187 large values can "swamp" small ones.
188 */
189 SkScalar intervals[2] = {837099584, 33450};
190 SkAutoTUnref<SkDashPathEffect> dash(
191 new SkDashPathEffect(intervals, 2, -10, false));
192 #endif
193 }
194
test_bigcubic(skiatest::Reporter * reporter)195 static void test_bigcubic(skiatest::Reporter* reporter) {
196 #ifdef SK_SCALAR_IS_FLOAT
197 SkPath path;
198 path.moveTo(64, 3);
199 path.cubicTo(-329936, -100000000, -329936, 100000000, 1153, 330003);
200
201 SkPaint paint;
202 paint.setAntiAlias(true);
203
204 SkAutoTUnref<SkCanvas> canvas(new_canvas(640, 480));
205 canvas.get()->drawPath(path, paint);
206 #endif
207 }
208
209 // we used to assert if the bounds of the device (clip) was larger than 32K
210 // even when the path itself was smaller. We just draw and hope in the debug
211 // version to not assert.
test_giantaa(skiatest::Reporter * reporter)212 static void test_giantaa(skiatest::Reporter* reporter) {
213 const int W = 400;
214 const int H = 400;
215 SkAutoTUnref<SkCanvas> canvas(new_canvas(33000, 10));
216 canvas.get()->clear(SK_ColorTRANSPARENT);
217
218 SkPaint paint;
219 paint.setAntiAlias(true);
220 SkPath path;
221 path.addOval(SkRect::MakeXYWH(-10, -10, 20 + W, 20 + H));
222 canvas.get()->drawPath(path, paint);
223 }
224
225 // Extremely large path_length/dash_length ratios may cause infinite looping
226 // in SkDashPathEffect::filterPath() due to single precision rounding.
227 // The test is quite expensive, but it should get much faster after the fix
228 // for http://crbug.com/165432 goes in.
test_infinite_dash(skiatest::Reporter * reporter)229 static void test_infinite_dash(skiatest::Reporter* reporter) {
230 SkPath path;
231 path.moveTo(0, 0);
232 path.lineTo(5000000, 0);
233
234 SkScalar intervals[] = { 0.2f, 0.2f };
235 SkDashPathEffect dash(intervals, 2, 0);
236
237 SkPath filteredPath;
238 SkPaint paint;
239 paint.setStyle(SkPaint::kStroke_Style);
240 paint.setPathEffect(&dash);
241
242 paint.getFillPath(path, &filteredPath);
243 // If we reach this, we passed.
244 REPORTER_ASSERT(reporter, true);
245 }
246
247 // http://crbug.com/165432
248 // Limit extreme dash path effects to avoid exhausting the system memory.
test_crbug_165432(skiatest::Reporter * reporter)249 static void test_crbug_165432(skiatest::Reporter* reporter) {
250 SkPath path;
251 path.moveTo(0, 0);
252 path.lineTo(10000000, 0);
253
254 SkScalar intervals[] = { 0.5f, 0.5f };
255 SkDashPathEffect dash(intervals, 2, 0);
256
257 SkPaint paint;
258 paint.setStyle(SkPaint::kStroke_Style);
259 paint.setPathEffect(&dash);
260
261 SkPath filteredPath;
262 SkStrokeRec rec(paint);
263 REPORTER_ASSERT(reporter, !dash.filterPath(&filteredPath, path, &rec, NULL));
264 REPORTER_ASSERT(reporter, filteredPath.isEmpty());
265 }
266
TestDrawPath(skiatest::Reporter * reporter)267 static void TestDrawPath(skiatest::Reporter* reporter) {
268 test_giantaa(reporter);
269 test_bug533(reporter);
270 test_bigcubic(reporter);
271 test_crbug_124652(reporter);
272 test_crbug_140642(reporter);
273 test_crbug_140803(reporter);
274 test_inversepathwithclip(reporter);
275 // why?
276 if (false) test_crbug131181(reporter);
277 test_infinite_dash(reporter);
278 test_crbug_165432(reporter);
279 }
280
281 #include "TestClassDef.h"
282 DEFINE_TESTCLASS("DrawPath", TestDrawPathClass, TestDrawPath)
283