| /* |
| * Copyright 2012 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| #include "PathOpsTestCommon.h" |
| #include "SkIntersections.h" |
| #include "SkPathOpsCubic.h" |
| #include "SkPathOpsLine.h" |
| #include "SkReduceOrder.h" |
| #include "Test.h" |
| |
| struct lineCubic { |
| SkDCubic cubic; |
| SkDLine line; |
| }; |
| |
| static lineCubic failLineCubicTests[] = { |
| {{{{37.5273438,-1.44140625}, {37.8736992,-1.69921875}, {38.1640625,-2.140625}, |
| {38.3984375,-2.765625}}}, |
| {{{40.625,-5.7890625}, {37.7109375,1.3515625}}}}, |
| }; |
| |
| static const size_t failLineCubicTests_count = SK_ARRAY_COUNT(failLineCubicTests); |
| |
| static void testFail(skiatest::Reporter* reporter, int iIndex) { |
| const SkDCubic& cubic = failLineCubicTests[iIndex].cubic; |
| SkASSERT(ValidCubic(cubic)); |
| const SkDLine& line = failLineCubicTests[iIndex].line; |
| SkASSERT(ValidLine(line)); |
| SkReduceOrder reduce1; |
| SkReduceOrder reduce2; |
| int order1 = reduce1.reduce(cubic, SkReduceOrder::kNo_Quadratics); |
| int order2 = reduce2.reduce(line); |
| if (order1 < 4) { |
| SkDebugf("[%d] cubic order=%d\n", iIndex, order1); |
| REPORTER_ASSERT(reporter, 0); |
| } |
| if (order2 < 2) { |
| SkDebugf("[%d] line order=%d\n", iIndex, order2); |
| REPORTER_ASSERT(reporter, 0); |
| } |
| if (order1 == 4 && order2 == 2) { |
| SkIntersections i; |
| int roots = i.intersect(cubic, line); |
| REPORTER_ASSERT(reporter, roots == 0); |
| } |
| } |
| |
| static lineCubic lineCubicTests[] = { |
| {{{{-634.60540771484375, -481.262939453125}, {266.2696533203125, -752.70867919921875}, |
| {-751.8370361328125, -317.37921142578125}, {-969.7427978515625, 824.7255859375}}}, |
| {{{-287.9506133720805678, -557.1376476615772617}, |
| {-285.9506133720805678, -557.1376476615772617}}}}, |
| |
| {{{{36.7184372,0.888650894}, {36.7184372,0.888650894}, {35.1233864,0.554015458}, |
| {34.5114098,-0.115255356}}}, {{{35.4531212,0}, {31.9375,0}}}}, |
| |
| {{{{421, 378}, {421, 380.209137f}, {418.761414f, 382}, {416, 382}}}, |
| {{{320, 378}, {421, 378.000031f}}}}, |
| |
| {{{{416, 383}, {418.761414f, 383}, {421, 380.761414f}, {421, 378}}}, |
| {{{320, 378}, {421, 378.000031f}}}}, |
| |
| {{{{154,715}, {151.238571,715}, {149,712.761414}, {149,710}}}, |
| {{{149,675}, {149,710.001465}}}}, |
| |
| {{{{0,1}, {1,6}, {4,1}, {4,3}}}, |
| {{{6,1}, {1,4}}}}, |
| |
| {{{{0,1}, {2,6}, {4,1}, {5,4}}}, |
| {{{6,2}, {1,4}}}}, |
| |
| {{{{0,4}, {3,4}, {6,2}, {5,2}}}, |
| {{{4,3}, {2,6}}}}, |
| #if 0 |
| {{{{258, 122}, {260.761414, 122}, { 263, 124.238579}, {263, 127}}}, |
| {{{259.82843, 125.17157}, {261.535522, 123.46447}}}}, |
| #endif |
| {{{{1006.6951293945312,291}, {1023.263671875,291}, {1033.8402099609375,304.43145751953125}, |
| {1030.318359375,321}}}, |
| {{{979.30487060546875,561}, {1036.695068359375,291}}}}, |
| {{{{259.30487060546875,561}, {242.73631286621094,561}, {232.15980529785156,547.56854248046875}, |
| {235.68154907226562,531}}}, |
| {{{286.69512939453125,291}, {229.30485534667969,561}}}}, |
| {{{{1, 2}, {2, 6}, {2, 0}, {1, 0}}}, {{{1, 0}, {1, 2}}}}, |
| {{{{0, 0}, {0, 1}, {0, 1}, {1, 1}}}, {{{0, 1}, {1, 0}}}}, |
| }; |
| |
| static const size_t lineCubicTests_count = SK_ARRAY_COUNT(lineCubicTests); |
| |
| static int doIntersect(SkIntersections& intersections, const SkDCubic& cubic, const SkDLine& line) { |
| int result; |
| bool flipped = false; |
| if (line[0].fX == line[1].fX) { |
| double top = line[0].fY; |
| double bottom = line[1].fY; |
| flipped = top > bottom; |
| if (flipped) { |
| SkTSwap<double>(top, bottom); |
| } |
| result = intersections.vertical(cubic, top, bottom, line[0].fX, flipped); |
| } else if (line[0].fY == line[1].fY) { |
| double left = line[0].fX; |
| double right = line[1].fX; |
| flipped = left > right; |
| if (flipped) { |
| SkTSwap<double>(left, right); |
| } |
| result = intersections.horizontal(cubic, left, right, line[0].fY, flipped); |
| } else { |
| intersections.intersect(cubic, line); |
| result = intersections.used(); |
| } |
| return result; |
| } |
| |
| static void testOne(skiatest::Reporter* reporter, int iIndex) { |
| const SkDCubic& cubic = lineCubicTests[iIndex].cubic; |
| SkASSERT(ValidCubic(cubic)); |
| const SkDLine& line = lineCubicTests[iIndex].line; |
| SkASSERT(ValidLine(line)); |
| SkReduceOrder reduce1; |
| SkReduceOrder reduce2; |
| int order1 = reduce1.reduce(cubic, SkReduceOrder::kNo_Quadratics); |
| int order2 = reduce2.reduce(line); |
| if (order1 < 4) { |
| SkDebugf("[%d] cubic order=%d\n", iIndex, order1); |
| REPORTER_ASSERT(reporter, 0); |
| } |
| if (order2 < 2) { |
| SkDebugf("[%d] line order=%d\n", iIndex, order2); |
| REPORTER_ASSERT(reporter, 0); |
| } |
| if (order1 == 4 && order2 == 2) { |
| SkIntersections i; |
| int roots = doIntersect(i, cubic, line); |
| for (int pt = 0; pt < roots; ++pt) { |
| double tt1 = i[0][pt]; |
| SkDPoint xy1 = cubic.ptAtT(tt1); |
| double tt2 = i[1][pt]; |
| SkDPoint xy2 = line.ptAtT(tt2); |
| if (!xy1.approximatelyEqual(xy2)) { |
| SkDebugf("%s [%d,%d] x!= t1=%g (%g,%g) t2=%g (%g,%g)\n", |
| __FUNCTION__, iIndex, pt, tt1, xy1.fX, xy1.fY, tt2, xy2.fX, xy2.fY); |
| } |
| REPORTER_ASSERT(reporter, xy1.approximatelyEqual(xy2)); |
| } |
| #if ONE_OFF_DEBUG |
| double cubicT = i[0][0]; |
| SkDPoint prev = cubic.ptAtT(cubicT * 2 - 1); |
| SkDPoint sect = cubic.ptAtT(cubicT); |
| double left[3] = { line.isLeft(prev), line.isLeft(sect), line.isLeft(cubic[3]) }; |
| SkDebugf("cubic=(%1.9g, %1.9g, %1.9g)\n", left[0], left[1], left[2]); |
| SkDebugf("{{%1.9g,%1.9g}, {%1.9g,%1.9g}},\n", prev.fX, prev.fY, sect.fX, sect.fY); |
| SkDebugf("{{%1.9g,%1.9g}, {%1.9g,%1.9g}},\n", sect.fX, sect.fY, cubic[3].fX, cubic[3].fY); |
| SkDPoint prevL = line.ptAtT(i[1][0] - 0.0000007); |
| SkDebugf("{{%1.9g,%1.9g}, {%1.9g,%1.9g}},\n", prevL.fX, prevL.fY, i.pt(0).fX, i.pt(0).fY); |
| SkDPoint nextL = line.ptAtT(i[1][0] + 0.0000007); |
| SkDebugf("{{%1.9g,%1.9g}, {%1.9g,%1.9g}},\n", i.pt(0).fX, i.pt(0).fY, nextL.fX, nextL.fY); |
| SkDebugf("prevD=%1.9g dist=%1.9g nextD=%1.9g\n", prev.distance(nextL), |
| sect.distance(i.pt(0)), cubic[3].distance(prevL)); |
| #endif |
| } |
| } |
| |
| DEF_TEST(PathOpsFailCubicLineIntersection, reporter) { |
| for (size_t index = 0; index < failLineCubicTests_count; ++index) { |
| int iIndex = static_cast<int>(index); |
| testFail(reporter, iIndex); |
| reporter->bumpTestCount(); |
| } |
| } |
| |
| DEF_TEST(PathOpsCubicLineIntersection, reporter) { |
| for (size_t index = 0; index < lineCubicTests_count; ++index) { |
| int iIndex = static_cast<int>(index); |
| testOne(reporter, iIndex); |
| reporter->bumpTestCount(); |
| } |
| } |
| |
| DEF_TEST(PathOpsCubicLineIntersectionOneOff, reporter) { |
| int iIndex = 0; |
| testOne(reporter, iIndex); |
| const SkDCubic& cubic = lineCubicTests[iIndex].cubic; |
| const SkDLine& line = lineCubicTests[iIndex].line; |
| SkIntersections i; |
| i.intersect(cubic, line); |
| SkASSERT(i.used() == 1); |
| } |