diff options
| -rw-r--r-- | src/plugins/platforms/cocoa/qcocoawindow.mm | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/plugins/platforms/cocoa/qcocoawindow.mm b/src/plugins/platforms/cocoa/qcocoawindow.mm index c6fa6795c1..5cd4beb4f0 100644 --- a/src/plugins/platforms/cocoa/qcocoawindow.mm +++ b/src/plugins/platforms/cocoa/qcocoawindow.mm @@ -1887,6 +1887,21 @@ QCocoaNSWindow *QCocoaWindow::createNSWindow(bool shouldBeChildNSWindow, bool sh applyContentBorderThickness(window); + // Prevent CoreGraphics RGB32 -> RGB64 backing store conversions on deep color + // displays by forcing 8-bit components, unless a deep color format has been + // requested. This conversion uses significant CPU time. + QSurface::SurfaceType surfaceType = QPlatformWindow::window()->surfaceType(); + bool usesCoreGraphics = surfaceType == QSurface::RasterSurface || surfaceType == QSurface::RasterGLSurface; + QSurfaceFormat surfaceFormat = QPlatformWindow::window()->format(); + bool usesDeepColor = surfaceFormat.redBufferSize() > 8 || + surfaceFormat.greenBufferSize() > 8 || + surfaceFormat.blueBufferSize() > 8; + bool usesLayer = view().layer; + if (usesCoreGraphics && !usesDeepColor && !usesLayer) { + [window setDynamicDepthLimit:NO]; + [window setDepthLimit:NSWindowDepthTwentyfourBitRGB]; + } + return window; } |