Mali GPU User Interface Engine Application Development Guide

Tutorial on the System Classes2.2 Creating a simple application with just the System and Keyboard classesThe following steps describe how to create a System and Keyboard interface:1. Open the main.cpp file from the 01 - Introduction to the System Interface project in theMDE Tutorial Examples folder.Example 2-1 shows how to create a System interface to use with the other librarycomponents:Example 2-1 Create a System object and a context#include #include int main(){MDE::Managed system = MDE::create_system_backend();#ifdef MDE_OS_PC_LINUXMDE::Context* context = system->createContext(320,240);#endif...The Managed template provides automatic lifetime checking and resource deletion. ARMrecommends that you always use it when creating library objects. If Managed is not used,there must be a corresponding call to release() for each object creation. For example:MDE::System* system = MDE::system_create_backend();...system->release();The createContext() parameters specify the width and height of the graphics window. Forthis example, the framebuffer is created but will not be used.2. Example 2-2 shows how to create a Keyboard interface:Example 2-2 Create a Keyboard object...#ifdef MDE_OS_PC_LINUXMDE::Keyboard* keyboard = system->createKeyboard(context);#elseMDE::Keyboard* keyboard = system->createKeyboard();#endif...NoteThere are minor difference in the creation of inputs between Windows and X11 platforms.Input devices are linked to specific contexts on X11 systems, for example, to a windowon the display that this input device is used with.3. Keyboard input sequences the program to the next stage. Example 2-3 on page 2-4 showshow to prompt the user to press the Esc key:ARM DUI 0527A-02a Copyright © 2010 ARM. All rights reserved. 2-3ID070710Non-Confidential - Draft - Beta