一种Windows下实时高效图形绘制算法

针对实时系统中对图形绘制速度的特殊要求,提出一种应用于Windows环境下应用程序客户区中的高效图形绘制算法,给出实现图形水平平移、竖直平移、自由平移、水平缩放、竖直缩放、自由缩放的关键技术。该算法基于无效矩形确定图形中需要绘制的数据和坐标轴范围,可避免大量不必要的重绘工作,实现图形高效、快速绘制,保证操作的实时性。利用内存DC绘图可避免图形闪烁,增强图形显示效果。与Matlab中绘图函数进行性能比较,证明了提出的图形绘制算法是有效的。

Real-time and Efficient Graphics-drawing Algorithm under Windows Condition

An efficient graphics-drawing algorithm applied to the client area of Windows system is proposed to meet the requirement of real-time systems.The key technologies which can realize the patterns＇ horizontal displacement,vertical translation,unconstrained translation,image horizontal scaling,image vertical scaling and image unconstrained scaling are presented.The data and axis scale which need to be drawed in graphics are determined with the algorithm by utilizing the invalid rectangle to avoid lots of unnecessary redrawing and realize efficient and fast graphics-drawing.With the memory DC,graphics flicker is avoided,as a result,the vividness of graphics is enhanced.In comparison with the plot function in Matlab,simulation results show that the algorithm proposed in this paper is efficient.