我的qtwayland合成器测试有一个奇怪的问题。看来仅适用于qt c ++客户端。 Qml客户端陷入死锁,事件处理停止(对于客户端)。 我更改了此https://doc.qt.io/archives/qt-5.11/qtwaylandcompositor-qwindow-compositor-example.html示例,并添加了以下功能:
void Compositor::onSurfaceCreated(QWaylandSurface *surface)
{
connect(surface, &QWaylandSurface::subsurfacePositionChanged, this, &WaylandInterface::onSubsurfacePositionChanged);
QQuickWindow *window = new QQuickWindow();
window->resize( 400, 400);
window->setVisible(true);
QWaylandOutput* output = new QWaylandOutput( this, window );
QCoreApplication::processEvents();
View *view = new View(this);
view->setSurface(surface);
view->setOutput(output);
view->m_window = window;
m_views << view;
connect(surface, &QWaylandSurface::surfaceDestroyed, view, [view] {
view->m_window->requestUpdate();
} );
connect(surface, &QWaylandSurface::hasContentChanged, this, &WaylandInterface::surfaceHasContentChanged);
connect(surface, &QWaylandSurface::hasContentChanged, view, [view] {
view->m_window->requestUpdate();
} );
connect(surface, &QWaylandSurface::redraw, view, [view] {
view->m_window->requestUpdate();
} );
QWaylandQuickItem * surfacItem = new QWaylandQuickItem( view->m_window->contentItem() );
surfacItem->setSurface( surface );
surfacItem->setOutput( view->output() );
surfacItem->setPaintEnabled(true);
surfacItem->setInputEventsEnabled(true);
connect(surface, &QWaylandSurface::offsetForNextFrame, view, &View::onOffsetForNextFrame);
connect(view, &QWaylandView::surfaceDestroyed, this, &WaylandInterface::viewSurfaceDestroyed);
}
对于c ++客户端,它创建一个窗口并将该客户端嵌入到其中,而qml客户端无响应。创建窗口,输出和QuickItem的顺序是否正确?我想念什么吗?
谢谢, 凯恩
答案 0 :(得分:0)
c ++客户端使用单线程渲染,而qml客户端使用渲染线程。当暴露事件发送到渲染器时,除非命令输出释放互斥量,否则qtwayland将阻止它。渲染器锁定帧缓冲区时,它正在等待服务器,而主线程正在等待渲染线程=> Deadlock。
回调可以通过以下方式发送 output-> frameStarted(); //渲染之前 output-> sendFrameCallbacks(); //渲染后