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QNX Software Development Platform
QNX SDP is a cross-compiling and debugging environment, including an IDE and command-line tools, for building binary images and programs for target boards running the QNX OS 8.0.
Graphics
OpenWF Display Server User's Guide
The OpenWF Display Server (wfd-server) is a resource manager that provides applications the ability to show image buffers directly to the display controller via the OpenWF Display API.
Introduction to the OpenWF Display Server
The OpenWF Display Server (wfd-server) enables applications to show image buffers on the display without using Screen.

QNX Momentics IDE User's Guide
This User's Guide describes version 8.0 of the Integrated Development Environment (IDE) that's part of the QNX Tool Suite.
QNX Software Development Platform
QNX SDP is a cross-compiling and debugging environment, including an IDE and command-line tools, for building binary images and programs for target boards running the QNX OS 8.0.
- Quickstart Guide
- System Architecture
  The System Architecture guide accompanies the QNX OS and is intended for both application developers and end-users.
- OS Components & Operations
- Graphics
  - Gestures Library Reference
    The Gestures library provides gesture recognizers to detect gestures through touch events that occur when you place one or more fingers on a touch screen.
  - Image Library Reference
  - Input Events Library Reference
    The Input Events library provides the framework necessary for Screen Graphics Subsystem to communicate with your touch driver.
  - OpenWF Configuration Developer's Guide
    If you are integrating a new display, you must configure and provide the parameters of your display based on its specifications via the OpenWF Display Configuration API (Wfdcfg Library).
  - OpenWF Display Server User's Guide
    The OpenWF Display Server (wfd-server) is a resource manager that provides applications the ability to show image buffers directly to the display controller via the OpenWF Display API.
    - Before you begin
    - Introduction to the OpenWF Display Server
      The OpenWF Display Server (wfd-server) enables applications to show image buffers on the display without using Screen.
    - Configuring OpenWF Display Server
      You configure the OpenWF Display server from the wfd device 1 section of your graphics configuration (e.g., graphics.conf) file.
    - Starting wfd-server
      Screen and OpenWF Display Server share the same graphic configuration file. Ensure that Screen and its associated libraries, along with the libraries associated with the OpenWF Display Server are available on your target.
    - Utilities and binaries
      WFD server includes some utilities and binaries to help with calibration, debugging, and demonstrating features.
    - wfdext.h
      QNX Extensions to OpenWF Display Specification.
  - Screen Graphics Subsystem Developer's Guide
    QNX Screen Graphics Subsystem is a graphics framework that provides all the functionality necessary to develop interactive user experiences.
  - Video Capture Developer's Guide
    The video capture framework provides applications the ability to capture frames from a video input source. These frames can be passed to a graphics component such as Screen for display.
- Programming
- System Security Guide
  The QNX System Security Guide is intended for both system integrators who are responsible for the security of a QNX OS system and developers who want to create a QNX OS resource manager free from vulnerabilities.
- Utilities & Libraries
- Migrating to QNX OS 8.0
QNX Software in the Cloud
QNX Software in the Cloud enables developers to use the QNX OS in the Amazon cloud environment.
QNX Toolkit for Visual Studio Code
This User's Guide describes the QNX^® Toolkit for Visual Studio Code. The guide introduces you to the QNX Toolkit by explaining the QNX development environment and how to build, run, and debug your QNX^® Operating System (OS) applications and systems.
QNX Hypervisor User's Guide
This User's Guide explains the QNX hypervisor architecture and provides instructions for installing and running a QNX Hypervisor system, changing system components and configuration, and using hypervisor features such as virtual devices (vdevs).
Typographical Conventions, Support, and Licensing
This section describes the typographical conventions used throughout the documentation, explains how to obtain technical support, and provides some information about licensing.

Introduction to the OpenWF Display Server

The OpenWF Display Server (wfd-server) enables applications to show image buffers on the display without using Screen.

OpenWF Display Server

The OpenWF Display Server is a resource manager that loads a platform-specific display driver. The OpenWF Display Server package provides the following:

A WFD client library (libWFDclient.so) to support communication between the OpenWF Display Server and Screen API or the OpenWF Display Server and OpenWFD-based applications
The WFD API that's defined by wfd.h; wfd.h complies to the Khronos OpenWF Display Specification (Version 1.0, 3 November 2009). For more information, see https://www.khronos.org/openwf/.
QNX extensions that are defined by wfdext.h
Demos and binaries

Applications whose graphical content is considered critical, requiring assurance that the graphical content is shown accurately on the display, should use the set of QNX WFD extensions and the WFD API to post buffers directly to at least one display. Other applications can continue to use Screen to show content on the display.

Your system can simultaneously support applications that use Screen, and applications that use the OpenWF Display Server to show content to the display.

Figure 1Applications using OpenWF Display Server and Screen

In the figure above, libWFDplatform is the name of your platform (e.g., J721e). This platform-specific driver is available from the set of Screen Board Support packages with QNX SDP 8.0 Screen.

Exceptions

The wfd-server and its library support most of the OpenWF Display specifications with the exceptions listed below.

The following is not currently supported:

Asynchronous event notification (WFDEvent)
Masks (WFDMask)
Streams (WFDNativeStreamType)

The function wfdDeviceCommit() has the following exception: For each pipeline, if the last wfdBindSourceToPipeline() call specifies WFD_TRANSITIONS_AT_VSYNC, regardless of a change in the source, the call is blocked until a vsync is detected on the port.

The function wfdDeviceCommit() is allowed to execute while another wfdDeviceCommit() is in progress. A WFD_ERROR_BUSY is not returned.

There are custom QNX extensions defined in the wfd-server header file wfdext.h. Not all extensions are supported on all hardware platforms. Run wfdIsExtensionSupported() to find which extensions are supported on your platform.

Page updated: March 05, 2025