1 简介................................................................................................................................................4
1.1 目的.........................................................................................................................................4
1.2 参考文献..................................................................................................................................5
2 用户界面扩展..................................................................................................................................6
2.1 全屏画布..................................................................................................................................6
2.2 绘制和填充三角形及多边形......................................................................................................7
2.3 绘制反转及旋转图片................................................................................................................8
2.4 透明支持..................................................................................................................................9
