From b02c8610176e1d1ceb65ac5d832d3a21c5a79d47 Mon Sep 17 00:00:00 2001 From: Vlad Zahorodnii Date: Sat, 29 Jan 2022 21:59:33 +0200 Subject: [PATCH 05/26] Make sure QQuickWidget and its offscreen window's screens are always in sync By default, the offscreen window is placed on the primary screen. However, if the parent widget argument is passed to the QQuickWidget's constructor, then QQuickWidget's and the offscreen window's screens can be different and that can create rendering issues, e.g. blurry text if the primary screen and QQuickWidget's screen have different scale factors. Change-Id: I10c62b5635664f943b11828773f14017f198a770 Reviewed-by: David Edmundson Reviewed-by: Laszlo Agocs (cherry picked from commit a2a2734bffa1459639b31fb3f4f83873ba44ab5c) --- src/quickwidgets/qquickwidget.cpp | 26 +++++++++++--------------- 1 file changed, 11 insertions(+), 15 deletions(-) diff --git a/src/quickwidgets/qquickwidget.cpp b/src/quickwidgets/qquickwidget.cpp index 39780f8de3..223d91f579 100644 --- a/src/quickwidgets/qquickwidget.cpp +++ b/src/quickwidgets/qquickwidget.cpp @@ -106,6 +106,7 @@ void QQuickWidgetPrivate::init(QQmlEngine* e) renderControl = new QQuickWidgetRenderControl(q); offscreenWindow = new QQuickWindow(*new QQuickOffcreenWindowPrivate(),renderControl); + offscreenWindow->setScreen(q->screen()); offscreenWindow->setTitle(QString::fromLatin1("Offscreen")); offscreenWindow->setObjectName(QString::fromLatin1("QQuickOffScreenWindow")); // Do not call create() on offscreenWindow. @@ -901,9 +902,7 @@ void QQuickWidgetPrivate::createContext() context = new QOpenGLContext; context->setFormat(offscreenWindow->requestedFormat()); - const QWindow *win = q->window()->windowHandle(); - if (win && win->screen()) - context->setScreen(win->screen()); + context->setScreen(q->screen()); QOpenGLContext *shareContext = qt_gl_global_share_context(); if (!shareContext) shareContext = QWidgetPrivate::get(q->window())->shareContext(); @@ -1520,19 +1519,16 @@ bool QQuickWidget::event(QEvent *e) d->handleWindowChange(); break; - case QEvent::ScreenChangeInternal: - if (QWindow *window = this->window()->windowHandle()) { - QScreen *newScreen = window->screen(); - - if (d->offscreenWindow) - d->offscreenWindow->setScreen(newScreen); - if (d->offscreenSurface) - d->offscreenSurface->setScreen(newScreen); + case QEvent::ScreenChangeInternal: { + QScreen *newScreen = screen(); + if (d->offscreenWindow) + d->offscreenWindow->setScreen(newScreen); + if (d->offscreenSurface) + d->offscreenSurface->setScreen(newScreen); #if QT_CONFIG(opengl) - if (d->context) - d->context->setScreen(newScreen); + if (d->context) + d->context->setScreen(newScreen); #endif - } if (d->useSoftwareRenderer #if QT_CONFIG(opengl) @@ -1545,7 +1541,7 @@ bool QQuickWidget::event(QEvent *e) d->render(true); } break; - + } case QEvent::Show: case QEvent::Move: d->updatePosition(); -- 2.40.1