QNX SDP 7.0开发手册 - 屏幕图形子系统开发者指南

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《QNX SDP 7.0 SCREEN开发者手册》是一本针对QNX软件开发平台7.0中的Screen图形子系统的开发者指南。本手册由加拿大QNX Software Systems Limited的子公司BlackBerry Limited出版，版权所有。该手册包含有关如何使用QNX SDP 7.0中的SCREEN软件进行图形开发的详细指导。其中包括SCREEN软件的安装和配置，图形界面的设计和开发，图形处理和渲染等方面的内容。通过学习本手册，开发者可以了解到如何利用QNX SDP 7.0中的SCREEN开发出高效、稳定的图形应用程序。 QNX SDP 7.0是由QNX Software Systems Limited开发的先进的软件开发平台。它提供了全面的开发工具和库，可以帮助开发者快速构建各种类型的应用程序。作为软件开发平台的一部分，SCREEN图形子系统是专门用于处理和显示图形数据的组件。本手册的目标读者是具有一定编程基础和图形开发经验的软件开发者。他们可以通过阅读本手册了解SCREEN图形子系统的基本概念和原理，并学会如何使用它进行图形应用程序的开发。总之，《QNX SDP 7.0 SCREEN开发者手册》是一本详细介绍QNX SDP 7.0中的SCREEN图形子系统的开发者指南。它对于想要开发高效、稳定图形应用程序的软件开发者来说是一份非常有价值的资料。无论是对于初学者还是有经验的开发者，阅读本手册都可以帮助他们快速入门并掌握SCREEN图形开发技术。

Group

A group is used to organize and manage multiple windows in your application. Groups

establish inheritance relationships between properties of the windows belonging to the same

group; therefore, applying changes to some properties of the window group has an effect

on all windows belonging to that group.. A parent window creates a group so that child

windows can join. Child windows inherit properties of their parent, but also have properties

that can be set and retrieved independently from their parent.

Pixmap

A pixmap is an off-screen rendering target. Its contents can be made visible only by copying

them to a window buffer. This can be done by using the native blit Screen API function, or

by using the pixmap as an OpenGL ES texture.

Session

An input session allows applications to control how raw events are processed into higher-level

events. A session allows your application to capture events that are specific to a certain

region, device, or Screen event type; it provides you more control over the dispatching of

input events than can be achieved through windows alone.

Stream

A stream allows graphical content to be produced and processed by components. With

streams, it's not necessary to associate graphical content to a display. The content can be

consumed by other componenets other than Screen. However, these components can still

use Screen to display the content.

Window

A window represents a drawing surface whose content is targeted for a display. There are

multiple types of windows (application windows, child windows, and embedded windows)

to accommodate the organization of the content for display.

Sample Screen applications

Screen provides a set of sample native applications that demonstrate what you can do with the Screen

API. These sample applications are installed on your host under each target-specific directory under

$QNX_TARGET .

Running these applications will help in determining whether or not you have set the appropriate Screen

configuration.

/usr/bin/gles1-vsync

This application uses software rendering to draw the gears.

/usr/bin/gles2-gears

This application shows gears that use OpenGL ES 2.X for the rendering API.

/usr/bin/vg-tiger

This application uses OpenVG for the rendering API.

2020, QNX Software Systems Limited

Application Development

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