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/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
// Unit tests for src/core/SkPoint.cpp and its header
#include "SkPoint.h"
#include "SkRect.h"
#include "Test.h"
static void test_casts(skiatest::Reporter* reporter) {
SkPoint p = { 0, 0 };
SkRect r = { 0, 0, 0, 0 };
const SkScalar* pPtr = SkTCast<const SkScalar*>(&p);
const SkScalar* rPtr = SkTCast<const SkScalar*>(&r);
REPORTER_ASSERT(reporter, p.asScalars() == pPtr);
REPORTER_ASSERT(reporter, r.asScalars() == rPtr);
}
// Tests that SkPoint::length() and SkPoint::Length() both return
// approximately expectedLength for this (x,y).
static void test_length(skiatest::Reporter* reporter, SkScalar x, SkScalar y,
SkScalar expectedLength) {
SkPoint point;
point.set(x, y);
SkScalar s1 = point.length();
SkScalar s2 = SkPoint::Length(x, y);
//The following should be exactly the same, but need not be.
//See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=323
REPORTER_ASSERT(reporter, SkScalarNearlyEqual(s1, s2));
REPORTER_ASSERT(reporter, SkScalarNearlyEqual(s1, expectedLength));
}
// Tests SkPoint::Normalize() for this (x,y)
static void test_Normalize(skiatest::Reporter* reporter,
SkScalar x, SkScalar y) {
SkPoint point;
point.set(x, y);
SkScalar oldLength = point.length();
SkScalar returned = SkPoint::Normalize(&point);
SkScalar newLength = point.length();
REPORTER_ASSERT(reporter, SkScalarNearlyEqual(returned, oldLength));
REPORTER_ASSERT(reporter, SkScalarNearlyEqual(newLength, SK_Scalar1));
}
static void PointTest(skiatest::Reporter* reporter) {
test_casts(reporter);
test_length(reporter, SkIntToScalar(3), SkIntToScalar(4), SkIntToScalar(5));
test_length(reporter, SkFloatToScalar(0.6f), SkFloatToScalar(0.8f),
SK_Scalar1);
test_Normalize(reporter, SkIntToScalar(3), SkIntToScalar(4));
test_Normalize(reporter, SkFloatToScalar(0.6f), SkFloatToScalar(0.8f));
}
#include "TestClassDef.h"
DEFINE_TESTCLASS("Point", PointTestClass, PointTest)
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