diff options
| -rw-r--r-- | src/plugins/platforms/cocoa/qcocoaglcontext.mm | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/plugins/platforms/cocoa/qcocoaglcontext.mm b/src/plugins/platforms/cocoa/qcocoaglcontext.mm index 76a210d0b6..7452d53579 100644 --- a/src/plugins/platforms/cocoa/qcocoaglcontext.mm +++ b/src/plugins/platforms/cocoa/qcocoaglcontext.mm @@ -501,6 +501,21 @@ void QCocoaGLContext::swapBuffers(QPlatformSurface *surface) return; } + if (m_context.view.layer) { + // Flushing an NSOpenGLContext will hit the screen immediately, ignoring + // any Core Animation transactions in place. This may result in major + // visual artifacts if the flush happens out of sync with the size + // of the layer, view, and window reflected by other parts of the UI, + // e.g. if the application flushes in the resize event or a timer during + // window resizing, instead of in the expose event. + auto *cocoaWindow = static_cast<QCocoaWindow *>(surface); + if (cocoaWindow->geometry().size() != cocoaWindow->m_exposedRect.size()) { + qCInfo(lcQpaOpenGLContext) << "Window exposed size does not match geometry (yet)." + << "Skipping flush to avoid visual artifacts."; + return; + } + } + QMutexLocker locker(&s_reentrancyMutex); [m_context flushBuffer]; } |