skia2/tests/PathOpsLineIntersectionTest.cpp
caryclark@google.com 0361032c0b path ops work in progress
fix bugs in tests on 32 bit release

Most changes revolve around pinning computed t values
very close to zero and one.

git-svn-id: http://skia.googlecode.com/svn/trunk@8745 2bbb7eff-a529-9590-31e7-b0007b416f81
2013-04-18 15:58:21 +00:00

63 lines
2.3 KiB
C++

/*
* 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] = {
{{{{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 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);
for (int i = 0; i < pts; ++i) {
SkDPoint result1 = line1.xyAtT(ts[0][i]);
SkDPoint result2 = line2.xyAtT(ts[1][i]);
if (!result1.approximatelyEqual(result2)) {
REPORTER_ASSERT(reporter, pts != 1);
result2 = line2.xyAtT(ts[1][i ^ 1]);
REPORTER_ASSERT(reporter, result1.approximatelyEqual(result2));
}
}
}
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); }
}
#include "TestClassDef.h"
DEFINE_TESTCLASS_SHORT(PathOpsLineIntersectionTest)