| /* |
| * 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 "src/pathops/SkIntersections.h" |
| #include "src/pathops/SkPathOpsLine.h" |
| #include "src/pathops/SkPathOpsQuad.h" |
| #include "src/pathops/SkReduceOrder.h" |
| #include "tests/PathOpsExtendedTest.h" |
| #include "tests/PathOpsTestCommon.h" |
| #include "tests/Test.h" |
| |
| #include <utility> |
| |
| static struct lineQuad { |
| QuadPts quad; |
| SkDLine line; |
| int result; |
| SkDPoint expected[2]; |
| } lineQuadTests[] = { |
| // quad line results |
| {{{{1, 1}, {2, 1}, {0, 2}}}, {{{0, 0}, {1, 1}}}, 1, {{1, 1}, {0, 0}} }, |
| {{{{0, 0}, {1, 1}, {3, 1}}}, {{{0, 0}, {3, 1}}}, 2, {{0, 0}, {3, 1}} }, |
| {{{{2, 0}, {1, 1}, {2, 2}}}, {{{0, 0}, {0, 2}}}, 0, {{0, 0}, {0, 0}} }, |
| {{{{4, 0}, {0, 1}, {4, 2}}}, {{{3, 1}, {4, 1}}}, 0, {{0, 0}, {0, 0}} }, |
| {{{{0, 0}, {0, 1}, {1, 1}}}, {{{0, 1}, {1, 0}}}, 1, {{.25, .75}, {0, 0}} }, |
| }; |
| |
| static size_t lineQuadTests_count = SK_ARRAY_COUNT(lineQuadTests); |
| |
| static int doIntersect(SkIntersections& intersections, const SkDQuad& quad, const SkDLine& line, |
| bool& flipped) { |
| int result; |
| flipped = false; |
| if (line[0].fX == line[1].fX) { |
| double top = line[0].fY; |
| double bottom = line[1].fY; |
| flipped = top > bottom; |
| if (flipped) { |
| using std::swap; |
| swap(top, bottom); |
| } |
| result = intersections.vertical(quad, 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) { |
| using std::swap; |
| swap(left, right); |
| } |
| result = intersections.horizontal(quad, left, right, line[0].fY, flipped); |
| } else { |
| intersections.intersect(quad, line); |
| result = intersections.used(); |
| } |
| return result; |
| } |
| |
| static struct oneLineQuad { |
| QuadPts quad; |
| SkDLine line; |
| } oneOffs[] = { |
| {{{{97.9337616,100}, {88,112.94265}, {88,130}}}, |
| {{{88.919838,120}, {107.058823,120}}}}, |
| {{{{447.96701049804687, 894.4381103515625}, {448.007080078125, 894.4239501953125}, |
| {448.0140380859375, 894.4215087890625}}}, |
| {{{490.43548583984375, 879.40740966796875}, {405.59262084960937, 909.435546875}}}}, |
| {{{{142.589081, 102.283646}, {149.821579, 100}, {158, 100}}}, |
| {{{90, 230}, {160, 60}}}}, |
| {{{{1101, 10}, {1101, 8.3431453704833984}, {1099.828857421875, 7.1711997985839844}}}, |
| {{{1099.828857421875,7.1711711883544922}, {1099.121337890625,7.8786783218383789}}}}, |
| {{{{973, 507}, {973, 508.24264526367187}, {972.12158203125, 509.12161254882812}}}, |
| {{{930, 467}, {973, 510}}}}, |
| {{{{369.848602, 145.680267}, {382.360413, 121.298294}, {406.207703, 121.298294}}}, |
| {{{406.207703, 121.298294}, {348.781738, 123.864815}}}}, |
| }; |
| |
| static size_t oneOffs_count = SK_ARRAY_COUNT(oneOffs); |
| |
| static void testOneOffs(skiatest::Reporter* reporter) { |
| bool flipped = false; |
| for (size_t index = 0; index < oneOffs_count; ++index) { |
| const QuadPts& q = oneOffs[index].quad; |
| SkDQuad quad; |
| quad.debugSet(q.fPts); |
| SkASSERT(ValidQuad(quad)); |
| const SkDLine& line = oneOffs[index].line; |
| SkASSERT(ValidLine(line)); |
| SkIntersections intersections; |
| int result = doIntersect(intersections, quad, line, flipped); |
| for (int inner = 0; inner < result; ++inner) { |
| double quadT = intersections[0][inner]; |
| SkDPoint quadXY = quad.ptAtT(quadT); |
| double lineT = intersections[1][inner]; |
| SkDPoint lineXY = line.ptAtT(lineT); |
| if (!quadXY.approximatelyEqual(lineXY)) { |
| quadXY.approximatelyEqual(lineXY); |
| } |
| REPORTER_ASSERT(reporter, quadXY.approximatelyEqual(lineXY)); |
| } |
| } |
| } |
| |
| DEF_TEST(PathOpsQuadLineIntersectionOneOff, reporter) { |
| testOneOffs(reporter); |
| } |
| |
| DEF_TEST(PathOpsQuadLineIntersection, reporter) { |
| for (size_t index = 0; index < lineQuadTests_count; ++index) { |
| int iIndex = static_cast<int>(index); |
| const QuadPts& q = lineQuadTests[index].quad; |
| SkDQuad quad; |
| quad.debugSet(q.fPts); |
| SkASSERT(ValidQuad(quad)); |
| const SkDLine& line = lineQuadTests[index].line; |
| SkASSERT(ValidLine(line)); |
| SkReduceOrder reducer1, reducer2; |
| int order1 = reducer1.reduce(quad); |
| int order2 = reducer2.reduce(line); |
| if (order1 < 3) { |
| SkDebugf("%s [%d] quad order=%d\n", __FUNCTION__, iIndex, order1); |
| REPORTER_ASSERT(reporter, 0); |
| } |
| if (order2 < 2) { |
| SkDebugf("%s [%d] line order=%d\n", __FUNCTION__, iIndex, order2); |
| REPORTER_ASSERT(reporter, 0); |
| } |
| SkIntersections intersections; |
| bool flipped = false; |
| int result = doIntersect(intersections, quad, line, flipped); |
| REPORTER_ASSERT(reporter, result == lineQuadTests[index].result); |
| if (intersections.used() <= 0) { |
| continue; |
| } |
| for (int pt = 0; pt < result; ++pt) { |
| double tt1 = intersections[0][pt]; |
| REPORTER_ASSERT(reporter, tt1 >= 0 && tt1 <= 1); |
| SkDPoint t1 = quad.ptAtT(tt1); |
| double tt2 = intersections[1][pt]; |
| REPORTER_ASSERT(reporter, tt2 >= 0 && tt2 <= 1); |
| SkDPoint t2 = line.ptAtT(tt2); |
| if (!t1.approximatelyEqual(t2)) { |
| SkDebugf("%s [%d,%d] x!= t1=%1.9g (%1.9g,%1.9g) t2=%1.9g (%1.9g,%1.9g)\n", |
| __FUNCTION__, iIndex, pt, tt1, t1.fX, t1.fY, tt2, t2.fX, t2.fY); |
| REPORTER_ASSERT(reporter, 0); |
| } |
| if (!t1.approximatelyEqual(lineQuadTests[index].expected[0]) |
| && (lineQuadTests[index].result == 1 |
| || !t1.approximatelyEqual(lineQuadTests[index].expected[1]))) { |
| SkDebugf("%s t1=(%1.9g,%1.9g)\n", __FUNCTION__, t1.fX, t1.fY); |
| REPORTER_ASSERT(reporter, 0); |
| } |
| } |
| } |
| } |
