PathOpsCubicLineIntersectionTest.cpp File Reference

#include "include/core/SkTypes.h"
#include "include/private/base/SkDebug.h"
#include "src/pathops/SkIntersections.h"
#include "src/pathops/SkPathOpsCubic.h"
#include "src/pathops/SkPathOpsDebug.h"
#include "src/pathops/SkPathOpsLine.h"
#include "src/pathops/SkPathOpsPoint.h"
#include "src/pathops/SkReduceOrder.h"
#include "tests/PathOpsTestCommon.h"
#include "tests/Test.h"
#include <array>
#include <cstddef>
#include <utility>

Go to the source code of this file.

Classes
struct	lineCubic

Functions
static void	testFail (skiatest::Reporter *reporter, int iIndex)
static int	doIntersect (SkIntersections &intersections, const SkDCubic &cubic, const SkDLine &line)
static void	testOne (skiatest::Reporter *reporter, int iIndex)
	DEF_TEST (PathOpsFailCubicLineIntersection, reporter)
	DEF_TEST (PathOpsCubicLineIntersection, reporter)
	DEF_TEST (PathOpsCubicLineIntersectionOneOff, reporter)

Variables
static lineCubic	failLineCubicTests []
static const size_t	failLineCubicTests_count = std::size(failLineCubicTests)
static lineCubic	lineCubicTests []
static const size_t	lineCubicTests_count = std::size(lineCubicTests)

Function Documentation

DEF_TEST() [1/3]

DEF_TEST	(	PathOpsCubicLineIntersection	,
		reporter
	)

Definition at line 194 of file PathOpsCubicLineIntersectionTest.cpp.

                                                 {
    for (size_t index = 0; index < lineCubicTests_count; ++index) {
        int iIndex = static_cast<int>(index);
        testOne(reporter, iIndex);
        reporter->bumpTestCount();
    }
}

DEF_TEST() [2/3]

DEF_TEST	(	PathOpsCubicLineIntersectionOneOff	,
		reporter
	)

Definition at line 202 of file PathOpsCubicLineIntersectionTest.cpp.

                                                       {
    int iIndex = 0;
    testOne(reporter, iIndex);
    const CubicPts& cuPts = lineCubicTests[iIndex].cubic;
    SkDCubic cubic;
    cubic.debugSet(cuPts.fPts);
    const SkDLine& line = lineCubicTests[iIndex].line;
    SkIntersections i;
    i.intersect(cubic, line);
    SkASSERT(i.used() == 1);
}

DEF_TEST() [3/3]

DEF_TEST	(	PathOpsFailCubicLineIntersection	,
		reporter
	)

Definition at line 186 of file PathOpsCubicLineIntersectionTest.cpp.

                                                     {
    for (size_t index = 0; index < failLineCubicTests_count; ++index) {
        int iIndex = static_cast<int>(index);
        testFail(reporter, iIndex);
        reporter->bumpTestCount();
    }
}

doIntersect()

static int doIntersect ( SkIntersections &  intersections, const SkDCubic &  cubic, const SkDLine &  line  )

static

Definition at line 109 of file PathOpsCubicLineIntersectionTest.cpp.

                                                                                                   {
    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) {
            using std::swap;
            swap(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) {
            using std::swap;
            swap(left, right);
        }
        result = intersections.horizontal(cubic, left, right, line[0].fY, flipped);
    } else {
        intersections.intersect(cubic, line);
        result = intersections.used();
    }
    return result;
}

testFail()

static void testFail ( skiatest::Reporter *  reporter, int  iIndex  )

static

Definition at line 35 of file PathOpsCubicLineIntersectionTest.cpp.

                                                             {
    const CubicPts& cuPts = failLineCubicTests[iIndex].cubic;
    SkDCubic cubic;
    cubic.debugSet(cuPts.fPts);
    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);
    }
}

testOne()

static void testOne ( skiatest::Reporter *  reporter, int  iIndex  )

static

Definition at line 137 of file PathOpsCubicLineIntersectionTest.cpp.

                                                            {
    const CubicPts& cuPts = lineCubicTests[iIndex].cubic;
    SkDCubic cubic;
    cubic.debugSet(cuPts.fPts);
    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);
        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
    }
}

Variable Documentation

failLineCubicTests

lineCubic failLineCubicTests[]

static

Initial value:

= {
    {{{{37.5273438,-1.44140625}, {37.8736992,-1.69921875}, {38.1640625,-2.140625},
            {38.3984375,-2.765625}}},
            {{{40.625,-5.7890625}, {37.7109375,1.3515625}}}},
}

Definition at line 27 of file PathOpsCubicLineIntersectionTest.cpp.

failLineCubicTests_count

const size_t failLineCubicTests_count = std::size(failLineCubicTests)

static

Definition at line 33 of file PathOpsCubicLineIntersectionTest.cpp.

lineCubicTests

lineCubic lineCubicTests[]

static

Definition at line 61 of file PathOpsCubicLineIntersectionTest.cpp.

lineCubicTests_count

const size_t lineCubicTests_count = std::size(lineCubicTests)

static

Definition at line 107 of file PathOpsCubicLineIntersectionTest.cpp.