diff options
Diffstat (limited to 'src/quick/items/qquickwindow.cpp')
| -rw-r--r-- | src/quick/items/qquickwindow.cpp | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/src/quick/items/qquickwindow.cpp b/src/quick/items/qquickwindow.cpp index c53fd00e45..05819c430f 100644 --- a/src/quick/items/qquickwindow.cpp +++ b/src/quick/items/qquickwindow.cpp @@ -4393,15 +4393,18 @@ QImage QQuickWindow::grabWindow() // backends like software can grab regardless of the window state if (d->windowManager && (d->windowManager->flags() & QSGRenderLoop::SupportsGrabWithoutExpose)) return d->windowManager->grab(this); - } - if (!isVisible() && !d->renderControl) { - if (d->rhi) { - if (d->windowManager) - return d->windowManager->grab(this); // ### we may need a full offscreen round when non-exposed? - return QImage(); + if (!isSceneGraphInitialized() && QSGRhiSupport::instance()->isRhiEnabled()) { + // We do not have rendering up and running. Forget the render loop, + // do a frame completely offscreen and synchronously into a + // texture. This can be *very* slow due to all the device/context + // and resource initialization but the documentation warns for it, + // and is still important for some use cases. + Q_ASSERT(!d->rhi); + return QSGRhiSupport::instance()->grabOffscreen(this); } + // ### Qt 6 remove #if QT_CONFIG(opengl) auto openglRenderContext = static_cast<QSGDefaultRenderContext *>(d->context); if (!openglRenderContext->openglContext()) { @@ -4435,6 +4438,10 @@ QImage QQuickWindow::grabWindow() #endif } + // The common case: we have an exposed window with an initialized + // scenegraph, meaning we can request grabbing via the render loop, or we + // are not targeting the window, in which case the request is to be + // forwarded to the rendercontrol. if (d->renderControl) return QQuickRenderControlPrivate::get(d->renderControl)->grab(); else if (d->windowManager) |