Dear Gunnar & other friends: I have read the blog http://qt-project.org/doc/qt-5/qtquick-visualcanvas-scenegraph-renderer.html I have a few questions about section performance: 1 Make sure the texture atlas is used. The Image and BorderImage items will use it unless the image is too large.
if the qml use Image item to load a jpg or png file, how could I check whether it use texture atlas. How large is the image to make it can't use texture atlas. 2 Clipping breaks batching . Never use on a per-item basis, inside tables cells, item delegates or similar. Instead of clipping text, use eliding. Instead of clipping an image, create a QQuickImageProvider that returns a cropped image. If my display resolution is 800*480, the background image is 1280*600, qml use image item to load the background image will be clipped. Is it right? If I want to avoid clip, should I write a cpp file use QQuickImageProvider to return a cropped image? Does qml item can't do it? One image item is usually a single batch, why the clipping can break it. Why different image items can't batch together? I am sorry to bother you for so much questions. Best Regards Nancy Member of the CSR plc group of companies. CSR plc registered in England and Wales, registered number 4187346, registered office Churchill House, Cambridge Business Park, Cowley Road, Cambridge, CB4 0WZ, United Kingdom More information can be found at www.csr.com. Keep up to date with CSR on our technical blog, www.csr.com/blog, CSR people blog, www.csr.com/people, YouTube, www.youtube.com/user/CSRplc, Facebook, www.facebook.com/pages/CSR/191038434253534, or follow us on Twitter at www.twitter.com/CSR_plc. New for 2014, you can now access the wide range of products powered by aptX at www.aptx.com. _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
