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 #include "PathOpsCubicIntersectionTestData.h" 8 #include "PathOpsQuadIntersectionTestData.h" 9 #include "PathOpsTestCommon.h" 10 #include "SkIntersections.h" 11 #include "SkPathOpsRect.h" 12 #include "SkReduceOrder.h" 13 #include "Test.h" 14 15 #if 0 // disable test until stroke reduction is supported 16 static bool controls_inside(const SkDCubic& cubic) { 17 return between(cubic[0].fX, cubic[1].fX, cubic[3].fX) 18 && between(cubic[0].fX, cubic[2].fX, cubic[3].fX) 19 && between(cubic[0].fY, cubic[1].fY, cubic[3].fY) 20 && between(cubic[0].fY, cubic[2].fY, cubic[3].fY); 21 } 22 23 static bool tiny(const SkDCubic& cubic) { 24 int index, minX, maxX, minY, maxY; 25 minX = maxX = minY = maxY = 0; 26 for (index = 1; index < 4; ++index) { 27 if (cubic[minX].fX > cubic[index].fX) { 28 minX = index; 29 } 30 if (cubic[minY].fY > cubic[index].fY) { 31 minY = index; 32 } 33 if (cubic[maxX].fX < cubic[index].fX) { 34 maxX = index; 35 } 36 if (cubic[maxY].fY < cubic[index].fY) { 37 maxY = index; 38 } 39 } 40 return approximately_equal(cubic[maxX].fX, cubic[minX].fX) 41 && approximately_equal(cubic[maxY].fY, cubic[minY].fY); 42 } 43 44 static void find_tight_bounds(const SkDCubic& cubic, SkDRect& bounds) { 45 SkDCubicPair cubicPair = cubic.chopAt(0.5); 46 if (!tiny(cubicPair.first()) && !controls_inside(cubicPair.first())) { 47 find_tight_bounds(cubicPair.first(), bounds); 48 } else { 49 bounds.add(cubicPair.first()[0]); 50 bounds.add(cubicPair.first()[3]); 51 } 52 if (!tiny(cubicPair.second()) && !controls_inside(cubicPair.second())) { 53 find_tight_bounds(cubicPair.second(), bounds); 54 } else { 55 bounds.add(cubicPair.second()[0]); 56 bounds.add(cubicPair.second()[3]); 57 } 58 } 59 #endif 60 61 DEF_TEST(PathOpsReduceOrderCubic, reporter) { 62 size_t index; 63 SkReduceOrder reducer; 64 int order; 65 enum { 66 RunAll, 67 RunPointDegenerates, 68 RunNotPointDegenerates, 69 RunLines, 70 RunNotLines, 71 RunModEpsilonLines, 72 RunLessEpsilonLines, 73 RunNegEpsilonLines, 74 RunQuadraticLines, 75 RunQuadraticPoints, 76 RunQuadraticModLines, 77 RunComputedLines, 78 RunNone 79 } run = RunAll; 80 int firstTestIndex = 0; 81 #if 0 82 run = RunComputedLines; 83 firstTestIndex = 18; 84 #endif 85 int firstPointDegeneratesTest = run == RunAll ? 0 : run == RunPointDegenerates 86 ? firstTestIndex : SK_MaxS32; 87 int firstNotPointDegeneratesTest = run == RunAll ? 0 : run == RunNotPointDegenerates 88 ? firstTestIndex : SK_MaxS32; 89 int firstLinesTest = run == RunAll ? 0 : run == RunLines ? firstTestIndex : SK_MaxS32; 90 int firstNotLinesTest = run == RunAll ? 0 : run == RunNotLines ? firstTestIndex : SK_MaxS32; 91 int firstModEpsilonTest = run == RunAll ? 0 : run == RunModEpsilonLines 92 ? firstTestIndex : SK_MaxS32; 93 int firstLessEpsilonTest = run == RunAll ? 0 : run == RunLessEpsilonLines 94 ? firstTestIndex : SK_MaxS32; 95 int firstNegEpsilonTest = run == RunAll ? 0 : run == RunNegEpsilonLines 96 ? firstTestIndex : SK_MaxS32; 97 int firstQuadraticPointTest = run == RunAll ? 0 : run == RunQuadraticPoints 98 ? firstTestIndex : SK_MaxS32; 99 int firstQuadraticLineTest = run == RunAll ? 0 : run == RunQuadraticLines 100 ? firstTestIndex : SK_MaxS32; 101 int firstQuadraticModLineTest = run == RunAll ? 0 : run == RunQuadraticModLines 102 ? firstTestIndex : SK_MaxS32; 103 #if 0 104 int firstComputedLinesTest = run == RunAll ? 0 : run == RunComputedLines 105 ? firstTestIndex : SK_MaxS32; 106 #endif 107 for (index = firstPointDegeneratesTest; index < pointDegenerates_count; ++index) { 108 const SkDCubic& cubic = pointDegenerates[index]; 109 SkASSERT(ValidCubic(cubic)); 110 order = reducer.reduce(cubic, SkReduceOrder::kAllow_Quadratics); 111 if (order != 1) { 112 SkDebugf("[%d] pointDegenerates order=%d\n", static_cast<int>(index), order); 113 REPORTER_ASSERT(reporter, 0); 114 } 115 } 116 for (index = firstNotPointDegeneratesTest; index < notPointDegenerates_count; ++index) { 117 const SkDCubic& cubic = notPointDegenerates[index]; 118 SkASSERT(ValidCubic(cubic)); 119 order = reducer.reduce(cubic, SkReduceOrder::kAllow_Quadratics); 120 if (order == 1) { 121 SkDebugf("[%d] notPointDegenerates order=%d\n", static_cast<int>(index), order); 122 order = reducer.reduce(cubic, SkReduceOrder::kAllow_Quadratics); 123 REPORTER_ASSERT(reporter, 0); 124 } 125 } 126 for (index = firstLinesTest; index < lines_count; ++index) { 127 const SkDCubic& cubic = lines[index]; 128 SkASSERT(ValidCubic(cubic)); 129 order = reducer.reduce(cubic, SkReduceOrder::kAllow_Quadratics); 130 if (order != 2) { 131 SkDebugf("[%d] lines order=%d\n", static_cast<int>(index), order); 132 REPORTER_ASSERT(reporter, 0); 133 } 134 } 135 for (index = firstNotLinesTest; index < notLines_count; ++index) { 136 const SkDCubic& cubic = notLines[index]; 137 SkASSERT(ValidCubic(cubic)); 138 order = reducer.reduce(cubic, SkReduceOrder::kAllow_Quadratics); 139 if (order == 2) { 140 SkDebugf("[%d] notLines order=%d\n", static_cast<int>(index), order); 141 REPORTER_ASSERT(reporter, 0); 142 } 143 } 144 for (index = firstModEpsilonTest; index < modEpsilonLines_count; ++index) { 145 const SkDCubic& cubic = modEpsilonLines[index]; 146 SkASSERT(ValidCubic(cubic)); 147 order = reducer.reduce(cubic, SkReduceOrder::kAllow_Quadratics); 148 if (order == 2) { 149 SkDebugf("[%d] line mod by epsilon order=%d\n", static_cast<int>(index), order); 150 REPORTER_ASSERT(reporter, 0); 151 } 152 } 153 for (index = firstLessEpsilonTest; index < lessEpsilonLines_count; ++index) { 154 const SkDCubic& cubic = lessEpsilonLines[index]; 155 SkASSERT(ValidCubic(cubic)); 156 order = reducer.reduce(cubic, SkReduceOrder::kAllow_Quadratics); 157 if (order != 2) { 158 SkDebugf("[%d] line less by epsilon/2 order=%d\n", static_cast<int>(index), order); 159 order = reducer.reduce(cubic, SkReduceOrder::kAllow_Quadratics); 160 REPORTER_ASSERT(reporter, 0); 161 } 162 } 163 for (index = firstNegEpsilonTest; index < negEpsilonLines_count; ++index) { 164 const SkDCubic& cubic = negEpsilonLines[index]; 165 SkASSERT(ValidCubic(cubic)); 166 order = reducer.reduce(cubic, SkReduceOrder::kAllow_Quadratics); 167 if (order != 2) { 168 SkDebugf("[%d] line neg by epsilon/2 order=%d\n", static_cast<int>(index), order); 169 REPORTER_ASSERT(reporter, 0); 170 } 171 } 172 for (index = firstQuadraticPointTest; index < quadraticPoints_count; ++index) { 173 const SkDQuad& quad = quadraticPoints[index]; 174 SkASSERT(ValidQuad(quad)); 175 SkDCubic cubic = quad.toCubic(); 176 order = reducer.reduce(cubic, SkReduceOrder::kAllow_Quadratics); 177 if (order != 1) { 178 SkDebugf("[%d] point quad order=%d\n", static_cast<int>(index), order); 179 REPORTER_ASSERT(reporter, 0); 180 } 181 } 182 for (index = firstQuadraticLineTest; index < quadraticLines_count; ++index) { 183 const SkDQuad& quad = quadraticLines[index]; 184 SkASSERT(ValidQuad(quad)); 185 SkDCubic cubic = quad.toCubic(); 186 order = reducer.reduce(cubic, SkReduceOrder::kAllow_Quadratics); 187 if (order != 2) { 188 SkDebugf("[%d] line quad order=%d\n", static_cast<int>(index), order); 189 REPORTER_ASSERT(reporter, 0); 190 } 191 } 192 for (index = firstQuadraticModLineTest; index < quadraticModEpsilonLines_count; ++index) { 193 const SkDQuad& quad = quadraticModEpsilonLines[index]; 194 SkASSERT(ValidQuad(quad)); 195 SkDCubic cubic = quad.toCubic(); 196 order = reducer.reduce(cubic, SkReduceOrder::kAllow_Quadratics); 197 if (order != 3) { 198 SkDebugf("[%d] line mod quad order=%d\n", static_cast<int>(index), order); 199 REPORTER_ASSERT(reporter, 0); 200 } 201 } 202 203 #if 0 // disable test until stroke reduction is supported 204 // test if computed line end points are valid 205 for (index = firstComputedLinesTest; index < lines_count; ++index) { 206 const SkDCubic& cubic = lines[index]; 207 SkASSERT(ValidCubic(cubic)); 208 bool controlsInside = controls_inside(cubic); 209 order = reducer.reduce(cubic, SkReduceOrder::kAllow_Quadratics, 210 SkReduceOrder::kStroke_Style); 211 if (order == 2 && reducer.fLine[0] == reducer.fLine[1]) { 212 SkDebugf("[%d] line computed ends match order=%d\n", static_cast<int>(index), order); 213 REPORTER_ASSERT(reporter, 0); 214 } 215 if (controlsInside) { 216 if ( (reducer.fLine[0].fX != cubic[0].fX && reducer.fLine[0].fX != cubic[3].fX) 217 || (reducer.fLine[0].fY != cubic[0].fY && reducer.fLine[0].fY != cubic[3].fY) 218 || (reducer.fLine[1].fX != cubic[0].fX && reducer.fLine[1].fX != cubic[3].fX) 219 || (reducer.fLine[1].fY != cubic[0].fY && reducer.fLine[1].fY != cubic[3].fY)) { 220 SkDebugf("[%d] line computed ends order=%d\n", static_cast<int>(index), order); 221 REPORTER_ASSERT(reporter, 0); 222 } 223 } else { 224 // binary search for extrema, compare against actual results 225 // while a control point is outside of bounding box formed by end points, split 226 SkDRect bounds = {DBL_MAX, DBL_MAX, -DBL_MAX, -DBL_MAX}; 227 find_tight_bounds(cubic, bounds); 228 if ( (!AlmostEqualUlps(reducer.fLine[0].fX, bounds.fLeft) 229 && !AlmostEqualUlps(reducer.fLine[0].fX, bounds.fRight)) 230 || (!AlmostEqualUlps(reducer.fLine[0].fY, bounds.fTop) 231 && !AlmostEqualUlps(reducer.fLine[0].fY, bounds.fBottom)) 232 || (!AlmostEqualUlps(reducer.fLine[1].fX, bounds.fLeft) 233 && !AlmostEqualUlps(reducer.fLine[1].fX, bounds.fRight)) 234 || (!AlmostEqualUlps(reducer.fLine[1].fY, bounds.fTop) 235 && !AlmostEqualUlps(reducer.fLine[1].fY, bounds.fBottom))) { 236 SkDebugf("[%d] line computed tight bounds order=%d\n", static_cast<int>(index), order); 237 REPORTER_ASSERT(reporter, 0); 238 } 239 } 240 } 241 #endif 242 } 243
