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 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 25 static SkCanvas* new_canvas(int w, int h) { 26 return create(SkBitmap::kARGB_8888_Config, w, h, 0, NULL); 27 } 28 29 /////////////////////////////////////////////////////////////////////////////// 30 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 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 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 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 // 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 } 140 141 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 } 159 160 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 } 181 182 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 } 194 195 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. 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. 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. 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 } 266 267 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
