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/*
* 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 "SkIntersections.h"
#include "SkPathOpsLine.h"
#include "Test.h"
// FIXME: add tests for intersecting, non-intersecting, degenerate, coincident
static const SkDLine tests[][2] = {
{{{{192, 4}, {243, 4}}}, {{{246, 4}, {189, 4}}}},
{{{{246, 4}, {189, 4}}}, {{{192, 4}, {243, 4}}}},
{{{{5, 0}, {0, 5}}}, {{{5, 4}, {1, 4}}}},
{{{{0, 0}, {1, 0}}}, {{{1, 0}, {0, 0}}}},
{{{{0, 0}, {0, 0}}}, {{{0, 0}, {1, 0}}}},
{{{{0, 1}, {0, 1}}}, {{{0, 0}, {0, 2}}}},
{{{{0, 0}, {1, 0}}}, {{{0, 0}, {2, 0}}}},
{{{{1, 1}, {2, 2}}}, {{{0, 0}, {3, 3}}}},
{{{{166.86950047022856, 112.69654129527828}, {166.86948801592692, 112.69655741235339}}},
{{{166.86960700313026, 112.6965477747386}, {166.86925794355412, 112.69656471103423}}}}
};
static const size_t tests_count = SK_ARRAY_COUNT(tests);
static const SkDLine noIntersect[][2] = {
{{{{0, 0}, {1, 0}}}, {{{3, 0}, {2, 0}}}},
{{{{0, 0}, {0, 0}}}, {{{1, 0}, {2, 0}}}},
{{{{0, 1}, {0, 1}}}, {{{0, 3}, {0, 2}}}},
{{{{0, 0}, {1, 0}}}, {{{2, 0}, {3, 0}}}},
{{{{1, 1}, {2, 2}}}, {{{4, 4}, {3, 3}}}},
};
static const size_t noIntersect_count = SK_ARRAY_COUNT(noIntersect);
static void check_results(skiatest::Reporter* reporter, const SkDLine& line1, const SkDLine& line2,
const SkIntersections& ts) {
for (int i = 0; i < ts.used(); ++i) {
SkDPoint result1 = line1.xyAtT(ts[0][i]);
SkDPoint result2 = line2.xyAtT(ts[1][i]);
if (!result1.approximatelyEqual(result2)) {
REPORTER_ASSERT(reporter, ts.used() != 1);
result2 = line2.xyAtT(ts[1][i ^ 1]);
REPORTER_ASSERT(reporter, result1.approximatelyEqual(result2));
REPORTER_ASSERT(reporter, result1.approximatelyEqual(ts.pt(i).asSkPoint()));
}
}
}
static void PathOpsLineIntersectionTest(skiatest::Reporter* reporter) {
size_t index;
for (index = 0; index < tests_count; ++index) {
const SkDLine& line1 = tests[index][0];
const SkDLine& line2 = tests[index][1];
SkIntersections ts;
int pts = ts.intersect(line1, line2);
REPORTER_ASSERT(reporter, pts);
REPORTER_ASSERT(reporter, pts == ts.used());
check_results(reporter, line1, line2, ts);
if (line1[0] == line1[1] || line2[0] == line2[1]) {
continue;
}
if (line1[0].fY == line1[1].fY) {
double left = SkTMin(line1[0].fX, line1[1].fX);
double right = SkTMax(line1[0].fX, line1[1].fX);
ts.horizontal(line2, left, right, line1[0].fY, line1[0].fX != left);
check_results(reporter, line2, line1, ts);
}
if (line2[0].fY == line2[1].fY) {
double left = SkTMin(line2[0].fX, line2[1].fX);
double right = SkTMax(line2[0].fX, line2[1].fX);
ts.horizontal(line1, left, right, line2[0].fY, line2[0].fX != left);
check_results(reporter, line1, line2, ts);
}
if (line1[0].fX == line1[1].fX) {
double top = SkTMin(line1[0].fY, line1[1].fY);
double bottom = SkTMax(line1[0].fY, line1[1].fY);
ts.vertical(line2, top, bottom, line1[0].fX, line1[0].fY != top);
check_results(reporter, line2, line1, ts);
}
if (line2[0].fX == line2[1].fX) {
double top = SkTMin(line2[0].fY, line2[1].fY);
double bottom = SkTMax(line2[0].fY, line2[1].fY);
ts.vertical(line1, top, bottom, line2[0].fX, line2[0].fY != top);
check_results(reporter, line1, line2, ts);
}
}
for (index = 0; index < noIntersect_count; ++index) {
const SkDLine& line1 = noIntersect[index][0];
const SkDLine& line2 = noIntersect[index][1];
SkIntersections ts;
int pts = ts.intersect(line1, line2);
REPORTER_ASSERT(reporter, !pts);
REPORTER_ASSERT(reporter, pts == ts.used());
}
}
#include "TestClassDef.h"
DEFINE_TESTCLASS_SHORT(PathOpsLineIntersectionTest)
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