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Improve tst_QColorSpace::imageConversion64PM test

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Makes it able to catch the last bug of saturating color values above a
certain value.

Change-Id: Ib2a3918623a1defe2981efe61cf8118e019e9d4b
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@qt.io>
This commit is contained in:
Allan Sandfeld Jensen 2021-06-13 09:28:46 +02:00
parent 046d819e2e
commit ec675f5dc7
1 changed files with 17 additions and 8 deletions
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25
tests/auto/gui/painting/qcolorspace/tst_qcolorspace.cpp
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@ -353,6 +353,9 @@ void tst_QColorSpace::imageConversion64()
lastGreen = qGreen(p);
lastBlue = qBlue(p);
}
QCOMPARE(lastRed, 255);
QCOMPARE(lastGreen, 255);
QCOMPARE(lastBlue, 255);
}
void tst_QColorSpace::imageConversion64PM_data()
@ -383,19 +386,20 @@ void tst_QColorSpace::imageConversion64PM()
int lastGreen = 0;
int lastBlue = 0;
for (int j = 0; j < 16; ++j) {
const int expectedAlpha = j * 15;
for (int i = 0; i < 256; ++i) {
QRgb p = testImage.pixel(i, j);
QVERIFY(qRed(p) >= lastRed);
QVERIFY(qGreen(p) >= lastGreen);
QVERIFY(qBlue(p) >= lastBlue);
QCOMPARE(qAlpha(p), j * 15);
QCOMPARE(qAlpha(p), expectedAlpha);
lastRed = qRed(p);
lastGreen = qGreen(p);
lastBlue = qBlue(p);
}
QVERIFY(lastRed <= j * 15);
QVERIFY(lastGreen <= j * 15);
QVERIFY(lastBlue <= j * 15);
QVERIFY(lastRed <= expectedAlpha);
QVERIFY(lastGreen <= expectedAlpha);
QVERIFY(lastBlue <= expectedAlpha);
lastRed = 0;
lastGreen = 0;
lastBlue = 0;
@ -404,21 +408,26 @@ void tst_QColorSpace::imageConversion64PM()
testImage.convertToColorSpace(fromColorSpace);
QCOMPARE(testImage.colorSpace(), QColorSpace(fromColorSpace));
for (int j = 0; j < 16; ++j) {
const int expectedAlpha = j * 15;
for (int i = 0; i < 256; ++i) {
QRgb expected = qPremultiply(qRgba(i, i, i, expectedAlpha));
QRgb p = testImage.pixel(i, j);
QCOMPARE(qRed(p), qGreen(p));
QCOMPARE(qRed(p), qBlue(p));
QCOMPARE(qAlpha(p), j * 15);
QCOMPARE(qAlpha(p), expectedAlpha);
QVERIFY((lastRed - qRed(p)) <= 0);
QVERIFY((lastGreen - qGreen(p)) <= 0);
QVERIFY((lastBlue - qBlue(p)) <= 0);
QVERIFY(qAbs(qRed(p) - qRed(expected)) <= 1);
QVERIFY(qAbs(qGreen(p) - qGreen(expected)) <= 1);
QVERIFY(qAbs(qBlue(p) - qBlue(expected)) <= 1);
lastRed = qRed(p);
lastGreen = qGreen(p);
lastBlue = qBlue(p);
}
QVERIFY(lastRed <= j * 15);
QVERIFY(lastGreen <= j * 15);
QVERIFY(lastBlue <= j * 15);
QCOMPARE(lastRed, expectedAlpha);
QCOMPARE(lastGreen, expectedAlpha);
QCOMPARE(lastBlue, expectedAlpha);
lastRed = 0;
lastGreen = 0;
lastBlue = 0;