坐标变换技术在Windows GDI设计中的应用  

Application of Coordinates Transform Technology in Windows GDI Design

作　　者：何西华[1] 顾小丰[1] 

机构地区：[1]电子科技大学计算机学院,四川成都610054

出　　处：《软件导刊》2008年第6期48-50,共3页Software Guide

摘　　要：图形设备接口(GDI)是Windows的子系统,它负责在显示器和打印机上输出图形。坐标变换是一种用于在显示区域绘图的技术,通过将逻辑坐标变换为设备坐标,使Windows GDI具备了支持设备无关性的能力。从Windows的坐标系统入手,说明了坐标变换的原理以及与之相对应的映射模式的分类和使用,并对应用中出现的问题提出了解决方案。Graphics Device Interface（GDI） is part of the Windows operating system, which responsible for graphics output through monitors or printers. Windows GDI is capable of device independence by changing logical coordinates into device coordinates. The coordinates transform technology is used to draw graphics on client area in a window in Windows GDI programming. This paper introduces the Windows coordinates system first, and then illustrates the principles of coordinates transform and the ,responding mapping mode. A solution for an application issue is also proposed in the end.

关 键 词：坐标变换 映射模式 设备坐标 逻辑坐标 

分 类 号：TP311.52[自动化与计算机技术—计算机软件与理论]