Method, device and mobile terminal for drawing user interface using opengl

Abstract

The invention discloses a method and a device for drawing a user interface by using OpenGL and a mobile terminal. The method comprises the steps of transferring a matrix operation interface; obtaining a position parameter of a painting element of the matrix operation interface; obtaining position information of the painting element according to the matrix operation interface; and drawing the user interface according to the position information of the painting element, wherein the matrix operation interface is a preset interface for substituting the position parameter into matrix transformation to calculate the position information of the painting element relative to a reference coordinate origin. According to the method and the device and the mobile terminal, matrix operation when the user interface is drawn by using the OpenGL is transformed into direct transferring of the matrix operation interface, so that a developer does not need to carry out complicated matrix operation, and the development difficulty can be reduced.

Description

【Technical field】 [0001] The invention relates to the field of image drawing, in particular to a method, a device and a mobile terminal when using OpenGL to draw a user interaction interface. 【Background technique】 [0002] The full name of OpenGL is Open Graphics Library, which is an open graphics library. It is a professional graphics interface program that defines cross-programming language and cross-platform programming interface specifications. It is independent of the Windows operating system or other operating systems and can be implemented on PCs, workstations, Development of high-performance, impactful and high-visual expressive graphics processing software on hardware devices such as supercomputers and mobile phones. [0003] When using OpenGL to draw the user interface, the basic drawing process is divided into: clearing the buffer, setting the current color, drawing geometric units (drawing models), and outputting graphics. The transformation of OpenGL is actual...

AI Technical Summary

Problems solved by technology

Whether it is moving, rotating or scaling, the goal is achieved by multiplying a new matrix on the basis of the current matrix. When drawing a model, it is necessary to first determine the coordinates of the drawing elements relative to the origin of the coordinates, and then calculate each matrix through matrix transformation. Position information such as the displacement, rotation angle, cropping, and window transformation of each drawing element relative to the origin of the coordinates, and the above position information needs to be determined by matrix operations. There are various types of transformation matrices, such as: rotation matrix, translation matrix, projection matrix, Perspective division matrix, window transformation matrix, etc., when performing multiple transformations, not only need to perform multiple matrix operations, but also need to consider the order of matrix operations, such complex matrix operations greatly increase the difficulty of program development

[0004] In addition, if there is a hierarchical relationship between multiple drawing elements, the corresponding relationship cannot be established through matrix operations, but the final position after nesting needs to be calculated by multiplying multiple matrices, which makes the OpenGL transformation more complicated.

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