Home
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.
wfdext.h
QNX Extensions to OpenWF Display Specification.
WFD_QNX_destination_acquire_image
WFD_QNX_destination_acquire_image
wfdReleaseDestinationImageQNX()
Release an image that was acquired from a destination

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.
      - WFD_QNX_bchs_filter
        WFD_QNX_bchs_filter
      - WFD_QNX_destination
        WFD_QNX_destination
      - WFD_QNX_destination_acquire_image
        WFD_QNX_destination_acquire_image
        wfdAcquireDestinationImageQNX()
        Acquire an image from a destination
        wfdReleaseDestinationImageQNX()
        Release an image that was acquired from a destination
      - WFD_QNX_destination_create_from_images
        WFD_QNX_destination_create_from_images
      - WFD_QNX_egl_images
        WFD_QNX_egl_images
      - WFD_QNX_pipeline_color_space
        WFD_QNX_pipeline_color_space
      - WFD_QNX_port_brightness
        WFD_QNX_port_brightness
      - WFD_QNX_port_mode_info
        WFD_QNX_port_mode_info
      - WFD_QNX_port_writeback
        WFD_QNX_port_writeback
      - WFD_QNX_read_source_pixels
        WFD_QNX_read_source_pixels
      - WFD_QNX_vsync
        WFD_QNX_vsync
      - WFD_QNX_tls_error_mode
        WFD_QNX_tls_error_mode
  - 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.

wfdReleaseDestinationImageQNX()

Release an image that was acquired from a destination

Synopsis:

#include <wfd/wfdext.h>

__errno_t wfdReleaseDestinationImageQNX(WFDDevice device, WFDDestinationQNX destination, WFDint index)

Arguments:

device: A WFD device handle.
destination: A destination handle associated with device.
index: The index of the image to release.

Library:

libWFDclient

Description:

Release the specified image and return its ownership to the driver.

This function does not affect any values returned by wfdGetError().

Returns:

EOK: Success.

EINVAL: The index was out of range or referred to a buffer that was already owned by the driver.

ENOENT: A bad handle was specified.

Page updated: March 05, 2025