an optimized rendering algorithm for hardware implementation of openVG 2D vector graphics

An optimized rendering algorithm of the OpenVG 2D vector graphics for hardware implementation is presented in this paper. In the rendering algorithm we adopted a hybrid of raster and vector rendering, which uses vector rendering only within each scanline, to reduce both the number of external memory accesses and the computational complexity. We implemented a hardware accelerator with the proposed algorithm. Experimental results show that our hardware accelerator can handle 11.8 fps of Tiger image for a QVGA panel at the operating clock frequency of 100 MHz.

I. Introduction

Recently, the mobile applications using the 2D vector graphics such as SVG viewers, portable mapping applications, E-book readers, games, scalable user interfaces has been widely accepted in embedded devices because the 2D vector graphics has relatively smaller input data file size, provides lossless compression without artifacts and easy scalability for any target display size [1]. These features are provided at the cost of its increased computational complexity. For mobile devices, we need to reduce its power consumption by implementing it in hardware. The OpenVG^TM is a promising 2D vector graphics standard constituted recently by the Khronos group. It is a royalty-free, cross-platform API that provides low-level interfaces for vector graphics libraries such as Flash and SVG. Its primary applications are targeted for the handheld devices that require high-quality rendering with a limited power budget [2].