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QIcon::pixmap() add a note about the changed behavior

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With Qt6.8 QIcon::pixmap() no longer scales the size by the devicePixelRatio passed to QIconEngine::scaledPixmap(). This means that external icon engines now must be adjusted to honor this change.

[ChangeLog][Important Behavior Change] QIcon::pixmap() is fixed to no longer scale the size, passed to QIconEngine::scaledPixmap(), by the devicePixelRatio.

Change-Id: Ic93e10a81cd58fba4580c3f1522cc27e2b05cea5
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
(cherry picked from commit ecc13e3d41af89bd195e6f173b2c96d2295f407e)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
This commit is contained in:
Christian Ehrlicher 2024-08-17 21:38:23 +02:00 committed by Qt Cherry-pick Bot
parent 108162274b
commit 61b9195fc2
1 changed files with 4 additions and 0 deletions
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src/gui/image/qicon.cpp
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@ -904,6 +904,10 @@ QPixmap QIcon::pixmap(const QSize &size, Mode mode, State state) const
might be smaller than requested, but never larger, unless the device-pixel ratio might be smaller than requested, but never larger, unless the device-pixel ratio
of the returned pixmap is larger than 1. of the returned pixmap is larger than 1.
\note Prior to Qt 6.8 this function wronlgy passed the device dependent pixmap size to
QIconEngine::scaledPixmap(), since Qt 6.8 it's the device independent size (not scaled
with the \a devicePixelRatio).
\sa actualSize(), paint() \sa actualSize(), paint()
*/ */
QPixmap QIcon::pixmap(const QSize &size, qreal devicePixelRatio, Mode mode, State state) const QPixmap QIcon::pixmap(const QSize &size, qreal devicePixelRatio, Mode mode, State state) const