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Document how to create a QColorTransform via QColorSpace

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Change-Id: If651a4f17f52ff784bc0832440f41fb30cd29371
Reviewed-by: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
(cherry picked from commit 5effd7ad53997a5a1edcba09457036971cbdcd54)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
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Tor Arne Vestbø 2024-10-04 09:56:32 +02:00 committed by Qt Cherry-pick Bot
parent f6fa4c4145
commit bc83fb11a1
1 changed files with 8 additions and 0 deletions
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src/gui/painting/qcolortransform.cpp
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@ -84,6 +84,14 @@ void QColorTransformPrivate::updateLutsOut() const
It can be applied on color and pixels to convert them from one color space to
another.
To create a QColorTransform, use QColorSpace::transformationToColorSpace():
\code
QColorSpace sourceColorSpace(QColorSpace::SRgb);
QColorSpace targetColorSpace(QColorSpace::DisplayP3);
QColorTransform srgbToP3Transform = sourceColorSpace.transformationToColorSpace(targetColorSpace);
\endcode
Setting up a QColorTransform takes some preprocessing, so keeping around
QColorTransforms that you need often is recommended, instead of generating
them on the fly.