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 "SkBitmap.h" 9 #include "SkCanvas.h" 10 #include "SkColor.h" 11 #include "SkDashPathEffect.h" 12 #include "SkImageInfo.h" 13 #include "SkMatrix.h" 14 #include "SkPaint.h" 15 #include "SkPath.h" 16 #include "SkPathEffect.h" 17 #include "SkPoint.h" 18 #include "SkRRect.h" 19 #include "SkRect.h" 20 #include "SkRefCnt.h" 21 #include "SkScalar.h" 22 #include "SkStrokeRec.h" 23 #include "SkSurface.h" 24 #include "SkTypes.h" 25 #include "Test.h" 26 27 // test that we can draw an aa-rect at coordinates > 32K (bigger than fixedpoint) 28 static void test_big_aa_rect(skiatest::Reporter* reporter) { 29 SkBitmap output; 30 SkPMColor pixel[1]; 31 output.installPixels(SkImageInfo::MakeN32Premul(1, 1), pixel, 4); 32 33 auto surf = SkSurface::MakeRasterN32Premul(300, 33300); 34 SkCanvas* canvas = surf->getCanvas(); 35 36 SkRect r = { 0, 33000, 300, 33300 }; 37 int x = SkScalarRoundToInt(r.left()); 38 int y = SkScalarRoundToInt(r.top()); 39 40 // check that the pixel in question starts as transparent (by the surface) 41 if (surf->readPixels(output, x, y)) { 42 REPORTER_ASSERT(reporter, 0 == pixel[0]); 43 } else { 44 REPORTER_ASSERT(reporter, false, "readPixels failed"); 45 } 46 47 SkPaint paint; 48 paint.setAntiAlias(true); 49 paint.setColor(SK_ColorWHITE); 50 51 canvas->drawRect(r, paint); 52 53 // Now check that it is BLACK 54 if (surf->readPixels(output, x, y)) { 55 // don't know what swizzling PMColor did, but white should always 56 // appear the same. 57 REPORTER_ASSERT(reporter, 0xFFFFFFFF == pixel[0]); 58 } else { 59 REPORTER_ASSERT(reporter, false, "readPixels failed"); 60 } 61 } 62 63 /////////////////////////////////////////////////////////////////////////////// 64 65 static void moveToH(SkPath* path, const uint32_t raw[]) { 66 const float* fptr = (const float*)raw; 67 path->moveTo(fptr[0], fptr[1]); 68 } 69 70 static void cubicToH(SkPath* path, const uint32_t raw[]) { 71 const float* fptr = (const float*)raw; 72 path->cubicTo(fptr[0], fptr[1], fptr[2], fptr[3], fptr[4], fptr[5]); 73 } 74 75 // This used to assert, because we performed a cast (int)(pt[0].fX * scale) to 76 // arrive at an int (SkFDot6) rather than calling sk_float_round2int. The assert 77 // was that the initial line-segment produced by the cubic was not monotonically 78 // going down (i.e. the initial DY was negative). By rounding the floats, we get 79 // the more proper result. 80 // 81 // http://code.google.com/p/chromium/issues/detail?id=131181 82 // 83 84 // we're not calling this test anymore; is that for a reason? 85 86 static void test_crbug131181() { 87 /* 88 fX = 18.8943768, 89 fY = 129.121277 90 }, { 91 fX = 18.8937435, 92 fY = 129.121689 93 }, { 94 fX = 18.8950119, 95 fY = 129.120422 96 }, { 97 fX = 18.5030727, 98 fY = 129.13121 99 */ 100 uint32_t data[] = { 101 0x419727af, 0x43011f0c, 0x41972663, 0x43011f27, 102 0x419728fc, 0x43011ed4, 0x4194064b, 0x43012197 103 }; 104 105 SkPath path; 106 moveToH(&path, &data[0]); 107 cubicToH(&path, &data[2]); 108 109 auto surface(SkSurface::MakeRasterN32Premul(640, 480)); 110 111 SkPaint paint; 112 paint.setAntiAlias(true); 113 surface->getCanvas()->drawPath(path, paint); 114 } 115 116 // This used to assert in debug builds (and crash writing bad memory in release) 117 // because we overflowed an intermediate value (B coefficient) setting up our 118 // stepper for the quadratic. Now we bias that value by 1/2 so we don't overflow 119 static void test_crbug_140803() { 120 SkBitmap bm; 121 bm.allocN32Pixels(2700, 30*1024); 122 SkCanvas canvas(bm); 123 124 SkPaint paint; 125 paint.setAntiAlias(true); 126 canvas.drawPath(SkPath().moveTo(2762, 20).quadTo(11, 21702, 10, 21706), paint); 127 } 128 129 // Need to exercise drawing an inverse-path whose bounds intersect the clip, 130 // but whose edges do not (since its a quad which draws only in the bottom half 131 // of its bounds). 132 // In the debug build, we used to assert in this case, until it was fixed. 133 // 134 static void test_inversepathwithclip() { 135 SkPath path; 136 137 path.moveTo(0, 20); 138 path.quadTo(10, 10, 20, 20); 139 path.toggleInverseFillType(); 140 141 SkPaint paint; 142 143 auto surface(SkSurface::MakeRasterN32Premul(640, 480)); 144 SkCanvas* canvas = surface->getCanvas(); 145 canvas->save(); 146 canvas->clipRect(SkRect::MakeWH(19, 11)); 147 148 paint.setAntiAlias(false); 149 canvas->drawPath(path, paint); 150 paint.setAntiAlias(true); 151 canvas->drawPath(path, paint); 152 153 canvas->restore(); 154 155 // Now do the test again, with the path flipped, so we only draw in the 156 // top half of our bounds, and have the clip intersect our bounds at the 157 // bottom. 158 path.reset(); // preserves our filltype 159 path.moveTo(0, 10); 160 path.quadTo(10, 20, 20, 10); 161 canvas->clipRect(SkRect::MakeXYWH(0, 19, 19, 11)); 162 163 paint.setAntiAlias(false); 164 canvas->drawPath(path, paint); 165 paint.setAntiAlias(true); 166 canvas->drawPath(path, paint); 167 } 168 169 static void test_bug533() { 170 /* 171 http://code.google.com/p/skia/issues/detail?id=533 172 This particular test/bug only applies to the float case, where the 173 coordinates are very large. 174 */ 175 SkPath path; 176 path.moveTo(64, 3); 177 path.quadTo(-329936, -100000000, 1153, 330003); 178 179 SkPaint paint; 180 paint.setAntiAlias(true); 181 182 auto surface(SkSurface::MakeRasterN32Premul(640, 480)); 183 surface->getCanvas()->drawPath(path, paint); 184 } 185 186 static void test_crbug_140642() { 187 /* 188 * We used to see this construct, and due to rounding as we accumulated 189 * our length, the loop where we apply the phase would run off the end of 190 * the array, since it relied on just -= each interval value, which did not 191 * behave as "expected". Now the code explicitly checks for walking off the 192 * end of that array. 193 194 * A different (better) fix might be to rewrite dashing to do all of its 195 * length/phase/measure math using double, but this may need to be 196 * coordinated with SkPathMeasure, to be consistent between the two. 197 198 <path stroke="mintcream" stroke-dasharray="27734 35660 2157846850 247" 199 stroke-dashoffset="-248.135982067"> 200 */ 201 202 const SkScalar vals[] = { 27734, 35660, 2157846850.0f, 247 }; 203 auto dontAssert = SkDashPathEffect::Make(vals, 4, -248.135982067f); 204 } 205 206 static void test_crbug_124652() { 207 /* 208 http://code.google.com/p/chromium/issues/detail?id=124652 209 This particular test/bug only applies to the float case, where 210 large values can "swamp" small ones. 211 */ 212 SkScalar intervals[2] = {837099584, 33450}; 213 auto dontAssert = SkDashPathEffect::Make(intervals, 2, -10); 214 } 215 216 static void test_bigcubic() { 217 SkPath path; 218 path.moveTo(64, 3); 219 path.cubicTo(-329936, -100000000, -329936, 100000000, 1153, 330003); 220 221 SkPaint paint; 222 paint.setAntiAlias(true); 223 224 auto surface(SkSurface::MakeRasterN32Premul(640, 480)); 225 surface->getCanvas()->drawPath(path, paint); 226 } 227 228 // asserts if halfway case is not handled 229 static void test_halfway() { 230 SkPaint paint; 231 SkPath path; 232 path.moveTo(16365.5f, 1394); 233 path.lineTo(16365.5f, 1387.5f); 234 path.quadTo(16365.5f, 1385.43f, 16367, 1383.96f); 235 path.quadTo(16368.4f, 1382.5f, 16370.5f, 1382.5f); 236 path.lineTo(16465.5f, 1382.5f); 237 path.quadTo(16467.6f, 1382.5f, 16469, 1383.96f); 238 path.quadTo(16470.5f, 1385.43f, 16470.5f, 1387.5f); 239 path.lineTo(16470.5f, 1394); 240 path.quadTo(16470.5f, 1396.07f, 16469, 1397.54f); 241 path.quadTo(16467.6f, 1399, 16465.5f, 1399); 242 path.lineTo(16370.5f, 1399); 243 path.quadTo(16368.4f, 1399, 16367, 1397.54f); 244 path.quadTo(16365.5f, 1396.07f, 16365.5f, 1394); 245 path.close(); 246 SkPath p2; 247 SkMatrix m; 248 m.reset(); 249 m.postTranslate(0.001f, 0.001f); 250 path.transform(m, &p2); 251 252 auto surface(SkSurface::MakeRasterN32Premul(640, 480)); 253 SkCanvas* canvas = surface->getCanvas(); 254 canvas->translate(-16366, -1383); 255 canvas->drawPath(p2, paint); 256 257 m.reset(); 258 m.postTranslate(-0.001f, -0.001f); 259 path.transform(m, &p2); 260 canvas->drawPath(p2, paint); 261 262 m.reset(); 263 path.transform(m, &p2); 264 canvas->drawPath(p2, paint); 265 } 266 267 // we used to assert if the bounds of the device (clip) was larger than 32K 268 // even when the path itself was smaller. We just draw and hope in the debug 269 // version to not assert. 270 static void test_giantaa() { 271 const int W = 400; 272 const int H = 400; 273 auto surface(SkSurface::MakeRasterN32Premul(33000, 10)); 274 275 SkPaint paint; 276 paint.setAntiAlias(true); 277 SkPath path; 278 path.addOval(SkRect::MakeXYWH(-10, -10, 20 + W, 20 + H)); 279 surface->getCanvas()->drawPath(path, paint); 280 } 281 282 // Extremely large path_length/dash_length ratios may cause infinite looping 283 // in SkDashPathEffect::filterPath() due to single precision rounding. 284 // The test is quite expensive, but it should get much faster after the fix 285 // for http://crbug.com/165432 goes in. 286 static void test_infinite_dash(skiatest::Reporter* reporter) { 287 SkPath path; 288 path.moveTo(0, 0); 289 path.lineTo(5000000, 0); 290 291 SkScalar intervals[] = { 0.2f, 0.2f }; 292 sk_sp<SkPathEffect> dash(SkDashPathEffect::Make(intervals, 2, 0)); 293 294 SkPath filteredPath; 295 SkPaint paint; 296 paint.setStyle(SkPaint::kStroke_Style); 297 paint.setPathEffect(dash); 298 299 paint.getFillPath(path, &filteredPath); 300 // If we reach this, we passed. 301 REPORTER_ASSERT(reporter, true); 302 } 303 304 // http://crbug.com/165432 305 // Limit extreme dash path effects to avoid exhausting the system memory. 306 static void test_crbug_165432(skiatest::Reporter* reporter) { 307 SkPath path; 308 path.moveTo(0, 0); 309 path.lineTo(10000000, 0); 310 311 SkScalar intervals[] = { 0.5f, 0.5f }; 312 sk_sp<SkPathEffect> dash(SkDashPathEffect::Make(intervals, 2, 0)); 313 314 SkPaint paint; 315 paint.setStyle(SkPaint::kStroke_Style); 316 paint.setPathEffect(dash); 317 318 SkPath filteredPath; 319 SkStrokeRec rec(paint); 320 REPORTER_ASSERT(reporter, !dash->filterPath(&filteredPath, path, &rec, nullptr)); 321 REPORTER_ASSERT(reporter, filteredPath.isEmpty()); 322 } 323 324 // http://crbug.com/472147 325 // This is a simplified version from the bug. RRect radii not properly scaled. 326 static void test_crbug_472147_simple(skiatest::Reporter* reporter) { 327 auto surface(SkSurface::MakeRasterN32Premul(1000, 1000)); 328 SkCanvas* canvas = surface->getCanvas(); 329 SkPaint p; 330 SkRect r = SkRect::MakeLTRB(-246.0f, 33.0f, 848.0f, 33554464.0f); 331 SkVector radii[4] = { 332 { 13.0f, 8.0f }, { 170.0f, 2.0 }, { 256.0f, 33554430.0f }, { 120.0f, 5.0f } 333 }; 334 SkRRect rr; 335 rr.setRectRadii(r, radii); 336 canvas->drawRRect(rr, p); 337 } 338 339 // http://crbug.com/472147 340 // RRect radii not properly scaled. 341 static void test_crbug_472147_actual(skiatest::Reporter* reporter) { 342 auto surface(SkSurface::MakeRasterN32Premul(1000, 1000)); 343 SkCanvas* canvas = surface->getCanvas(); 344 SkPaint p; 345 SkRect r = SkRect::MakeLTRB(-246.0f, 33.0f, 848.0f, 33554464.0f); 346 SkVector radii[4] = { 347 { 13.0f, 8.0f }, { 170.0f, 2.0 }, { 256.0f, 33554430.0f }, { 120.0f, 5.0f } 348 }; 349 SkRRect rr; 350 rr.setRectRadii(r, radii); 351 canvas->clipRRect(rr); 352 353 SkRect r2 = SkRect::MakeLTRB(0, 33, 1102, 33554464); 354 canvas->drawRect(r2, p); 355 } 356 357 DEF_TEST(DrawPath, reporter) { 358 test_giantaa(); 359 test_bug533(); 360 test_bigcubic(); 361 test_crbug_124652(); 362 test_crbug_140642(); 363 test_crbug_140803(); 364 test_inversepathwithclip(); 365 // why? 366 if (false) test_crbug131181(); 367 test_infinite_dash(reporter); 368 test_crbug_165432(reporter); 369 test_crbug_472147_simple(reporter); 370 test_crbug_472147_actual(reporter); 371 test_big_aa_rect(reporter); 372 test_halfway(); 373 } 374
