skia2/tests/PathOpsCubicLineIntersectionTest.cpp
caryclark@google.com 8d0a524a48 harden and speed up path op unit tests
PathOps tests internal routines direcctly. Check to make sure that
test points, lines, quads, curves, triangles, and bounds read from
arrays are valid (i.e., don't contain NaN) before calling the
test function.

Repurpose the test flags.
- make 'v' verbose test region output against path output
- make 'z' single threaded (before it made it multithreaded)

The latter change speeds up tests run by the buildbot by 2x to 3x.

BUG=

Review URL: https://codereview.chromium.org/19374003

git-svn-id: http://skia.googlecode.com/svn/trunk@10107 2bbb7eff-a529-9590-31e7-b0007b416f81
2013-07-16 16:11:16 +00:00

106 lines
4.0 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 "PathOpsTestCommon.h"
#include "SkIntersections.h"
#include "SkPathOpsCubic.h"
#include "SkPathOpsLine.h"
#include "SkReduceOrder.h"
#include "Test.h"
static struct lineCubic {
SkDCubic cubic;
SkDLine line;
} lineCubicTests[] = {
#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 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,
SkReduceOrder::kFill_Style);
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);
for (int pt = 0; pt < roots; ++pt) {
double tt1 = i[0][pt];
SkDPoint xy1 = cubic.xyAtT(tt1);
double tt2 = i[1][pt];
SkDPoint xy2 = line.xyAtT(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));
}
}
}
static void PathOpsCubicLineIntersectionTest(skiatest::Reporter* reporter) {
for (size_t index = 0; index < lineCubicTests_count; ++index) {
int iIndex = static_cast<int>(index);
testOne(reporter, iIndex);
reporter->bumpTestCount();
}
}
static void PathOpsCubicLineIntersectionOneOffTest(skiatest::Reporter* 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);
#if ONE_OFF_DEBUG
double cubicT = i[0][0];
SkDPoint prev = cubic.xyAtT(cubicT * 2 - 1);
SkDPoint sect = cubic.xyAtT(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.xyAtT(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.xyAtT(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
}
#include "TestClassDef.h"
DEFINE_TESTCLASS_SHORT(PathOpsCubicLineIntersectionTest)
DEFINE_TESTCLASS_SHORT(PathOpsCubicLineIntersectionOneOffTest)