From Qt Wiki

For non-feature updates and for important notices, please see Change-files-in-Qt-5.6.0

New Features

Qt Core Reduced memory usage of dynamic properties Allow logging directly to syslog on Linux systems Added QStorageInfo::blockSize() new QVersionNumber class Added key_iterator to QHash and QMap Added const_iterator QByteArray Added reverse iterator support to all sequential containers added QDir::listSeparator() Lots of performance optimisations in QString



Qt Network Added QHostAddress::isMulticast() Support HTTP redirection in QNetworkAccessManager



Qt GUI Improved cross-platform OpenGL ES 3.0 and 3.1 support to help the development of mobile/embedded apps utilizing GLES3 features. Improved cross-platform high-dpi support. Raster engine support for rendering internally with 16bits-per-color. QImageReader now exports gamma values and other meta data for some image formats



Qt Widgets Allow programmatic resizing of dock widgets Allow dropping dock widgets into floating docks Allow the user to re-arrange tabified docks Allow horizontal scrolling using a mouse wheel in QListView QOpenGLWidget and QQuickWidget are now supported on WinRT



Qt Testlib More stable input event handling



Qt Multimedia New Playlist QML type. New audio role API for the media player (C++ and QML) Support for camera focus and video probe on WinRT New functions in QML AudioEngine to support dynamic object creation



Qt WebEngine Based on Chromium 45 Support for pepper plugins including Flash Support for unbundling and linking with system libraries on Linux Support for following global Qt proxy settings. More WebActions from QtWebKit and WebAction API in QML. New QtWebEngineCore module for shared low-level API New core API for custom URL schemes New core API for intercepting and blocking network requests New core API for tracking or blocking cookies.



Qt QML Support for writing JavaScript function names to Linux's perf output Reduced overall memory consumption Moved all the debug services into plugins. Custom debug services can be added width additional plugins.



Font rendering Optional support for using FreeType on Mac OS X



Embedded platforms Added support for NVIDIA Jetson TK1 Pro boards running Vibrante Linux via a new eglfs backend utilizing DRM, EGLDevice and EGLStream Added support for Intel Atom-based NUCs



Desktop platforms Windows 10 fully supported (classic and WinRT app) Windows Store apps are now composited inside a XAML layer, allowing for better integration with the native UI layer



Windows embedded Added support for WEC2013



Qt WebView Added support for WinRT



Qt Canvas3D Support for using Qt Quick items as textures Support for rendering directly to Qt Quick scene background or foreground



Qt Nfc Added support for Android



Qt Positioning Added support for OS X Added support for GPS receivers exposed as a serial port on Windows desktop (all versions) Removed libgeoclue dependency for the GeoClue backend



Qt Location Added the Qt Location module providing maps, navigation and places APIs for Qt Quick



Other Changes

Embedded platforms libinput, when present, is now the default for eglfs and linuxfb



Image Formats For security reasons, the MNG and JPEG 2000 handlers will by default no longer be built, unless the corresponding codec libraries are provided by the OS. Hence, the binary Qt releases for Windows and Mac will not contain prebuilt handlers for those formats, but users can still build them from source.



Deprecated Modules

The following modules are part of Qt 5.6 release, but deprecated and considered for removal in subsequent releases of Qt:

Qt Script

Qt Enginio

Removed Modules

With Qt 5.6 the following modules are no longer part of the release packages, but users can still build them from source:

Qt WebKit

Qt Declarative (Qt Quick 1)

Technology Preview Modules

Qt 5.6 binary installer packages will contain technology preview of the following modules:

Qt 3D New buffer and attribute API Support for OpenGL instanced rendering where supported Support for OpenGL primitive restart Support for clip planes, stencil operations and many more OpenGL features Support for easily generating buffer data from C++ and QML (using javascript typed arrays) qgltf tool to compile scenes into glTF Support for loading glTF scenes via SceneLoader Support for controlling multisampling with Scene3D More standard materials: per-vertex colors, Gooch shading APIs for mouse input and collision detection New Logic aspect to have QML/C++ code executed synchronously with the Qt3D aspect engine. Useful for prototyping future Qt3D features Many bugfixes all around but especially around unloading and shutdown Many new examples

Qt Quick Controls 2.0 A new light-weight set of embedded and mobile orientation controls Based on a flexible template system that enables rapid development of entire custom styles and user experiences Built-in styles: Default style - a simple and minimal all-round style that offers the maximum performance Material style - a style based on the Google Material Design Guidelines Universal style - a style based on the Microsoft Universal Design Guidelines

Qt SerialBus New module for general purpose serial bus access with initial implementation for Controller Area Network (CAN) bus and Modbus



New Configurations

Qt 5.6 adds support to Windows Embedded Compact 13, and in addition there are changes in supported platform and compiler versions. More details what is now tested in Qt CI, please check Qt-5.6.0-tools-and-versions

Known Issues

More details here.