On May 23, 2014, at 6:03 PM, [email protected] wrote: > Sorvig: > >> From the latest new front: > > http://bgr.com/2014/03/18/nexus-9-specs-details/ > > Digitimes on Tuesday cited its own research arm in reporting that Google > will launch two new Nexus tablets in 2014. In addition to an updated > Nexus 7, Google is reportedly prepping a new 8.9-inch Nexus tablet that > will feature a Retina-busting screen with better-than-2K resolution. > > So will your HIGH DPI modification support the coming high res Android > stuff too?
The retina support that currently is in Qt/Mac (which would be extended to the other platforms) supports any float scale factor for HiDPI. > Cheers, > > md > > > On 5/23/2014 3:20 AM, Sorvig Morten wrote: >> Over the past year-and-a-half we’ve implemented high-dpi scaling for Qt on >> Mac OS X and iOS. Now we have an excellent opportunity to bring this >> support to other platforms. >> >> A quick recap for those unfamiliar: This high-dpi mode is an alternative to >> the traditional DPI scaling. In the traditional approach the application is >> presented with an DPI value used to multiply font sizes, layouts etc. In the >> new mode the operating system provides Qt with a scale factor which is used >> to scale graphics output: allocate larger buffers and set a scaling >> transform. >> >> The advantage of this approach is that that vector graphics and fonts scale >> automatically and existing applications tend to work unmodified. Raster >> content handling is a neutral point - the app author needs to provide >> high-resolution artwork but this is manageable. A typical disadvantage is >> confusion caused by the existence of two coordinate systems: “Are these >> style hints in device independent or device pixels?" >> >> Looking at other platforms: >> >> - WinRT: Already uses high-dpi scaling as of change aeea02ff10 . >> >> - Wayland: Version 1.2 added wl_output::scale, which we can use. This change >> implements high-dpi scaling for the backing store: >> >> https:/codereview.qt-project.org/#change,63600 >> >> - Platform independent support: We can bring high-dpi support to any >> platform by adding a coordinate translation layer to QWindow and >> QWindowSystemInterface and making minor modifications to the platform >> plugins. See the following changes: >> >> https://codereview.qt-project.org/#change,86107 >> https://codereview.qt-project.org/#change,86108 >> >> Some preliminary testing has been done with the XCB platform plugin: >> * KDE Frameworks 5: http://imgur.com/a/JhXSX#sUGYZmB >> * Qt Creator: http://i.imgur.com/EEwdPTD.png >> >> This also allows testing any scale factor on any hardware by setting an >> environment variable. >> >> >> Adding support to QtWayland looks like a win to me. Do we want to add >> platform-indepent support to Qt? Yes! :) -- Eike Ziller, Senior Software Engineer - Digia, Qt Digia Germany GmbH, Rudower Chaussee 13, D-12489 Berlin Geschäftsführer: Mika Pälsi, Juha Varelius, Tuula Haataja Sitz der Gesellschaft: Berlin, Registergericht: Amtsgericht Charlottenburg, HRB 144331 B _______________________________________________ Development mailing list [email protected] http://lists.qt-project.org/mailman/listinfo/development
