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Fix wrong grabbing behavior 

QQuickWidget::grabFrameBuffer() was not polishing its items nor
syncing the scene graph compared to standard QQuickWindow::grabWindow().
This lead to QQuickWidget grabbed content to be outdated (render
the previous frame as a new frame).

Task-number: QTBUG-57596
Change-Id: I94f5e0aa5b096fb9e21259267c0e50473e8ed5bd
Reviewed-by: Robin Burchell <robin.burchell@viroteck.net>
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
This commit is contained in:
Filipe Azevedo 2016-12-13 16:05:05 +01:00
parent 7b7322c497
commit 0d243a89ac
1 changed files with 5 additions and 0 deletions
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5
src/quick/items/qquickrendercontrol.cpp
View File

@ -380,6 +380,9 @@ QImage QQuickRenderControl::grab()
if (d->window->rendererInterface()->graphicsApi() == QSGRendererInterface::OpenGL) {
#if QT_CONFIG(opengl)
QQuickWindowPrivate *cd = QQuickWindowPrivate::get(d->window);
cd->polishItems();
cd->syncSceneGraph();
render();
grabContent = qt_gl_read_framebuffer(d->window->size() * d->window->effectiveDevicePixelRatio(), false, false);
#endif
@ -394,6 +397,8 @@ QImage QQuickRenderControl::grab()
QPaintDevice *prevDev = softwareRenderer->currentPaintDevice();
softwareRenderer->setCurrentPaintDevice(&grabContent);
softwareRenderer->markDirty();
cd->polishItems();
cd->syncSceneGraph();
render();
softwareRenderer->setCurrentPaintDevice(prevDev);
}