Method for optimizing video memory space in texture discharge manner

Abstract

The invention discloses a method for optimizing the video memory space in a texture discharge mode. Some of the three-dimensional rendering functions in OpenGL ES are encapsulated into a graphics engine library, and each object in the graphics engine library corresponds to a video memory space to store the drawn texture content. The process of obtaining the object texture space comprises the following steps of: a, applying for a video memory space with a size enough for binding into texture, and binding the video memory space into texture; b, obtaining a rectangular area from the video memory space bound into texture according to the size of the object, wherein the rectangular area can not be overlapped with the areas occupied by other objects; and c, storing the drawn texture content by each object corresponding to a rectangular area in a video memory space. In the invention, a video memory space is divided into multiple rectangular areas, and each rectangular area corresponds to an object and stores the texture content of the object, thus the utilization rate of the video memory space is greatly improved.

Description

Technical field [0001] The invention relates to the field of electronics, and in particular to a method for optimizing video memory space by using a texture layout method. Background technique [0002] OpenGL (Open Graphics Library, open graphics program function) is a convenient low-level graphics library for two-dimensional (2D) or three-dimensional (3D) images. OpenGLES (OpenGL for Embedded Systems) consists of a subset of desktop OpenGL, which is a subset of OpenGL 3D graphics API (Application Programming Interface, calling program programming functions). It is designed for embedded devices such as mobile phones, PDAs, and game consoles. It creates The underlying interaction function between software and graphics acceleration. Three-dimensional rendering technologies such as OpenGL ES are widely used in the development process of embedded software to meet the needs of digital entertainment products for rendering graphics, animation and other graphics, so that digital enterta...

AI Technical Summary

Problems solved by technology

[0003] However, using OpenGL to perform three-dimensional operations on images needs to be bound into textures. The size of the memory space that can be bound into textures in OpenGL can only be 2 n ×2 m (0≤n≤10, 0≤m≤10, 2 10 =1024), in practice, it is impossible for each picture to have a size of 2 n ×2 m of

if not 2 n ×2 m The size of the texture needs to be bound to it with a length and width no less than its 2 n ×2 m The video memory space can generate the available texture space, so a relatively large space is wasted

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