On Wed, 09 Sep 2009 14:33:48 +0200 Adriaan van Os <[email protected]> wrote:
> Lazarus has the TCarbonBitmapContext class, implemented as a Quartz > CGBitmapContext. User interface objects use a CGImage as pixel cache. > During profiling a Lazarus application on Mac OS X, I noticed that > the application spends a lot of time in > TCarbonDeviceContext.DrawCGImage. > > Apple writes > <http://developer.apple.com/mac/library/documentation/GraphicsImaging/Conceptual/drawingwithquartz2d/dq_context/dq_context.html> > > Graphics Contexts > Note: If you want to perform offscreen drawing, before you use a > bitmap graphics context, you should first read “CGLayer Drawing.” > CGLayer objects, introduced in Mac OS X v10.4 and available in iPhone > OS, support drawing to layers and provide a much more optimized > solution for offscreen drawing than bitmap graphics contexts provide. > > and > > Creating a Bitmap Graphics Context > CGLayer objects (CGLayerRef), available in Mac OS X v10.4 and later, > are optimized for offscreen drawing because, whenever possible, > Quartz caches layers on the video card. > > Therefore - unless someone else is working on it - I would like to > add CGLayer support to the Carbon widget, using CGLayers as pixel > cache for interface objects. Is this a change that the Lazarus team > would welcome ? My work will is being sponsored by PGMusic > <http://www.pgmusic.com>. ok for me Mattias -- _______________________________________________ Lazarus mailing list [email protected] http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
