Book Image

Cross-Platform Development with Qt 6 and Modern C++

By : Nibedit Dey
Book Image

Cross-Platform Development with Qt 6 and Modern C++

By: Nibedit Dey

Overview of this book

Qt is a cross-platform application development framework widely used for developing applications that can run on a wide range of hardware platforms with little to no change in the underlying codebase. If you have basic knowledge of C++ and want to build desktop or mobile applications with a modern graphical user interface (GUI), Qt is the right choice for you. Cross-Platform Development with Qt 6 and Modern C++ helps you understand why Qt is one of the favorite GUI frameworks adopted by industries worldwide, covering the essentials of programming GUI apps across a multitude of platforms using the standard C++17 and Qt 6 features. Starting with the fundamentals of the Qt framework, including the features offered by Qt Creator, this practical guide will show you how to create classic user interfaces using Qt Widgets and touch-friendly user interfaces using Qt Quick. As you advance, you'll explore the Qt Creator IDE for developing applications for multiple desktops as well as for embedded and mobile platforms. You will also learn advanced concepts about signals and slots. Finally, the book takes you through debugging and testing your app with Qt Creator IDE. By the end of this book, you'll be able to build cross-platform applications with a modern GUI along with the speed and power of native apps.
Table of Contents (17 chapters)
Section 1: The Basics
Section 2: Cross-Platform Development
Section 3: Advanced Programming, Debugging, and Deployment

Shader effects

For importing shaders into 3D scenes, Qt Quick 3D has its own framework. Shader effects enable the full, raw power of a graphics processing unit to be directly utilized via vertex and fragment shaders. Too many shader effects can result in increased power consumption and sometimes slow performance, but when used sparingly and carefully, a shader can allow complex and visually appealing effects to be applied to a visual object.

Both shaders are bound to the vertexShader and fragmentShader properties. Every shader's code requires a main(){…} function, which is executed by the GPU. A variable with the prefix qt_ is provided by Qt. To understand the variables in shader code, have a look at the OpenGL API reference document.

When working with ShaderEffect or subclassing QSGMaterialShader in QML applications using Qt Quick, the application must provide a baked shader pack in the form of a .qsb file. The Qt Shader Tools module includes a command-line tool...