diff options
Diffstat (limited to 'src/plugins/platforms/cocoa/qcocoawindow.mm')
-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 af44564968..d1f19f2de9 100644 --- a/src/plugins/platforms/cocoa/qcocoawindow.mm +++ b/src/plugins/platforms/cocoa/qcocoawindow.mm @@ -1442,6 +1442,21 @@ QCocoaNSWindow *QCocoaWindow::createNSWindow(bool shouldBePanel) applyContentBorderThickness(nsWindow); + // 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) { + [nsWindow setDynamicDepthLimit:NO]; + [nsWindow setDepthLimit:NSWindowDepthTwentyfourBitRGB]; + } + return nsWindow; } |