diff options
Diffstat (limited to 'src/hardwareintegration/client/wayland-egl/qwaylandglcontext.cpp')
-rw-r--r-- | src/hardwareintegration/client/wayland-egl/qwaylandglcontext.cpp | 25 |
1 files changed, 11 insertions, 14 deletions
diff --git a/src/hardwareintegration/client/wayland-egl/qwaylandglcontext.cpp b/src/hardwareintegration/client/wayland-egl/qwaylandglcontext.cpp index c9bd83752..6b9776e9c 100644 --- a/src/hardwareintegration/client/wayland-egl/qwaylandglcontext.cpp +++ b/src/hardwareintegration/client/wayland-egl/qwaylandglcontext.cpp @@ -316,7 +316,9 @@ QWaylandGLContext::QWaylandGLContext(EGLDisplay eglDisplay, QWaylandDisplay *dis mSupportNonBlockingSwap = false; } if (!mSupportNonBlockingSwap) { - qWarning() << "Non-blocking swap buffers not supported. Subsurface rendering can be affected."; + qWarning(lcQpaWayland) << "Non-blocking swap buffers not supported." + << "Subsurface rendering can be affected." + << "It may also cause the event loop to freeze in some situations"; } updateGLFormat(); @@ -556,20 +558,15 @@ void QWaylandGLContext::swapBuffers(QPlatformSurface *surface) m_blitter->blit(window); } - - QWaylandSubSurface *sub = window->subSurfaceWindow(); - if (sub) { - QMutexLocker l(sub->syncMutex()); - - int si = (sub->isSync() && mSupportNonBlockingSwap) ? 0 : m_format.swapInterval(); - - eglSwapInterval(m_eglDisplay, si); - eglSwapBuffers(m_eglDisplay, eglSurface); - } else { - eglSwapInterval(m_eglDisplay, m_format.swapInterval()); - eglSwapBuffers(m_eglDisplay, eglSurface); + int swapInterval = mSupportNonBlockingSwap ? 0 : m_format.swapInterval(); + eglSwapInterval(m_eglDisplay, swapInterval); + if (swapInterval == 0 && m_format.swapInterval() > 0) { + // Emulating a blocking swap + glFlush(); // Flush before waiting so we can swap more quickly when the frame event arrives + window->waitForFrameSync(100); } - + window->handleUpdate(); + eglSwapBuffers(m_eglDisplay, eglSurface); window->setCanResize(true); } |