QT-based two-dimensional/three-dimensional (2D/3D) graph drawing method and device

Abstract

The invention discloses a QT-based two-dimensional / three-dimensional (2D / 3D) graph drawing method and a QT-based 2D / 3D graph drawing device. The method comprises the following steps of: receiving a QT application, and performing corresponding processing according to an inherited object of the QT application; and establishing a corresponding application bottom layer according to the application type of the application, creating a corresponding window according to the application, and returning to a window handle, wherein the application type comprises 2D and 3D types. Support for OpenGL ES is increased in a mode of modifying QDirectFBScreen, and the correctness of drawing a 2D graph according to a principle can be ensured, so that research and development time is short, the design is simple, and a developer is not required to understand the writing mode of a graphics card driver. In addition, the graphics card driver can be written by a method provided by QT in spite of the 2D or 3D graph designed by a QT application layer.

Description

Technical field [0001] The invention relates to the field of embedded technology, in particular to a QT-based 2D / 3D graphics rendering method and device. Background technique [0002] With the more and more extensive applications of embedded systems, especially the application of linux embedded systems, more and more users are pursuing the interaction of graphics systems, and they also put forward higher and higher requirements for graphics systems. QT is a cross-platform C++ application framework, which is widely used in the development of graphical interface programs and provides developers with the functions needed to establish and establish state-of-the-art graphical interfaces. Therefore, QT is widely used as an open source graphics system. For example, the graphics operating environment KDE (Kool Desktop Environment) for Linux operation is developed based on the QT graphics engine. [0003] From the perspective of the development trend in the past few years, 3D technology ha...

AI Technical Summary

Problems solved by technology

[0006] Secondly, since the original framework and the graphics acceleration driver code are closely related, it is possible to write it successfully only if you are proficient in the graphics acceleration driver principle and Power VR’s QGLScreen Driver, and it will take a lot of time and effort;

[0007] Again, because the goal of the modification is to draw 3D OpenGL ES EGL, it is difficult to guarantee that QT's 2D drawing will not cause problems

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