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Fix ExtendedRgb and Rgb encoding comparisons

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ExtendedRgb should be treated as Rgb as it can be an automatic upgrade.

Pick-to: 5.15
Change-Id: I2942a1067ed5cacb2f60f303f467887cb44c36dd
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@qt.io>
This commit is contained in:
Allan Sandfeld Jensen 2020-05-26 12:14:02 +02:00
parent 0ea99a68f9
commit d80a98d525
2 changed files with 30 additions and 0 deletions
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10
src/gui/painting/qcolor.cpp
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@ -2883,6 +2883,8 @@ QColor &QColor::operator=(Qt::GlobalColor color) noexcept
Returns \c true if this color has the same color specification and component values as \a color;
otherwise returns \c false.
ExtendedRgb and Rgb specifications are considered matching in this context.
\sa spec()
*/
bool QColor::operator==(const QColor &color) const noexcept
@ -2896,6 +2898,12 @@ bool QColor::operator==(const QColor &color) const noexcept
|| ct.ahsl.lightness == USHRT_MAX
|| color.ct.ahsl.lightness == USHRT_MAX)
&& (qAbs(ct.ahsl.lightness - color.ct.ahsl.lightness)) < 50);
} else if ((cspec == ExtendedRgb || color.cspec == ExtendedRgb) &&
(cspec == color.cspec || cspec == Rgb || color.cspec == Rgb)) {
return qFuzzyCompare(alphaF(), color.alphaF())
&& qFuzzyCompare(redF(), color.redF())
&& qFuzzyCompare(greenF(), color.greenF())
&& qFuzzyCompare(blueF(), color.blueF());
} else {
return (cspec == color.cspec
&& ct.argb.alpha == color.ct.argb.alpha
@ -2912,6 +2920,8 @@ bool QColor::operator==(const QColor &color) const noexcept
Returns \c true if this color has different color specification or component values from
\a color; otherwise returns \c false.
ExtendedRgb and Rgb specifications are considered matching in this context.
\sa spec()
*/
bool QColor::operator!=(const QColor &color) const noexcept

20
tests/auto/gui/painting/qcolor/tst_qcolor.cpp
View File

@ -106,6 +106,8 @@ private slots:
void achromaticHslHue();
void equality();
void premultiply();
void unpremultiply_sse4();
void qrgba64();
@ -1682,6 +1684,24 @@ void tst_QColor::achromaticHslHue()
QCOMPARE(hsl.hslHue(), -1);
}
void tst_QColor::equality()
{
QColor red = Qt::red;
QColor black = Qt::black;
QCOMPARE(red, red);
QCOMPARE(black, black);
QVERIFY(red != black);
// Encodings must match
QVERIFY(red != red.toHsv());
QVERIFY(black.toHsl() != black);
// Except for ExtendedRgb and Rgb, as it can be an automatic upgrade.
QCOMPARE(red, red.toExtendedRgb());
QCOMPARE(black.toExtendedRgb(), black);
}
void tst_QColor::premultiply()
{
// Tests that qPremultiply(qUnpremultiply(x)) returns x.