зеркало из https://github.com/mozilla/moz-skia.git
80 строки
3.0 KiB
C++
80 строки
3.0 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 "SkLineParameters.h"
|
|
#include "Test.h"
|
|
|
|
// tests to verify that distance calculations are coded correctly
|
|
static const SkDCubic tests[] = {
|
|
{{{0, 0}, {1, 1}, {2, 2}, {0, 3}}},
|
|
{{{0, 0}, {1, 1}, {2, 2}, {3, 0}}},
|
|
{{{0, 0}, {5, 0}, {-2, 4}, {3, 4}}},
|
|
{{{0, 2}, {1, 0}, {2, 0}, {3, 0}}},
|
|
{{{0, .2}, {1, 0}, {2, 0}, {3, 0}}},
|
|
{{{0, .02}, {1, 0}, {2, 0}, {3, 0}}},
|
|
{{{0, .002}, {1, 0}, {2, 0}, {3, 0}}},
|
|
{{{0, .0002}, {1, 0}, {2, 0}, {3, 0}}},
|
|
{{{0, .00002}, {1, 0}, {2, 0}, {3, 0}}},
|
|
{{{0, FLT_EPSILON * 2}, {1, 0}, {2, 0}, {3, 0}}},
|
|
};
|
|
|
|
static const double answers[][2] = {
|
|
{1, 2},
|
|
{1, 2},
|
|
{4, 4},
|
|
{1.1094003924, 0.5547001962},
|
|
{0.133038021, 0.06651901052},
|
|
{0.0133330370, 0.006666518523},
|
|
{0.001333333037, 0.0006666665185},
|
|
{0.000133333333, 6.666666652e-05},
|
|
{1.333333333e-05, 6.666666667e-06},
|
|
{1.5894571940104115e-07, 7.9472859700520577e-08},
|
|
};
|
|
|
|
static const size_t tests_count = SK_ARRAY_COUNT(tests);
|
|
|
|
DEF_TEST(PathOpsLineParameters, reporter) {
|
|
for (size_t index = 0; index < tests_count; ++index) {
|
|
SkLineParameters lineParameters;
|
|
const SkDCubic& cubic = tests[index];
|
|
SkASSERT(ValidCubic(cubic));
|
|
lineParameters.cubicEndPoints(cubic, 0, 3);
|
|
double denormalizedDistance[2];
|
|
denormalizedDistance[0] = lineParameters.controlPtDistance(cubic, 1);
|
|
denormalizedDistance[1] = lineParameters.controlPtDistance(cubic, 2);
|
|
double normalSquared = lineParameters.normalSquared();
|
|
size_t inner;
|
|
for (inner = 0; inner < 2; ++inner) {
|
|
double distSq = denormalizedDistance[inner];
|
|
distSq *= distSq;
|
|
double answersSq = answers[index][inner];
|
|
answersSq *= answersSq;
|
|
if (AlmostEqualUlps(distSq, normalSquared * answersSq)) {
|
|
continue;
|
|
}
|
|
SkDebugf("%s [%d,%d] denormalizedDistance:%g != answer:%g"
|
|
" distSq:%g answerSq:%g normalSquared:%g\n",
|
|
__FUNCTION__, static_cast<int>(index), (int)inner,
|
|
denormalizedDistance[inner], answers[index][inner],
|
|
distSq, answersSq, normalSquared);
|
|
}
|
|
lineParameters.normalize();
|
|
double normalizedDistance[2];
|
|
normalizedDistance[0] = lineParameters.controlPtDistance(cubic, 1);
|
|
normalizedDistance[1] = lineParameters.controlPtDistance(cubic, 2);
|
|
for (inner = 0; inner < 2; ++inner) {
|
|
if (AlmostEqualUlps(fabs(normalizedDistance[inner]), answers[index][inner])) {
|
|
continue;
|
|
}
|
|
SkDebugf("%s [%d,%d] normalizedDistance:%1.9g != answer:%g\n",
|
|
__FUNCTION__, static_cast<int>(index), (int)inner,
|
|
normalizedDistance[inner], answers[index][inner]);
|
|
REPORTER_ASSERT(reporter, 0);
|
|
}
|
|
}
|
|
}
|