DirectDraw 覆盖表面Overlay绘制图形演示，现在很多播放器都是使用了覆盖表面 Overlay 技术显示，想学习Overlay 本例子是个不错的选择，例子用了3张图片来演示画面的切换以及位置设定。例子虽简单，但作用可不小呀。-DirectDraw Overlay surface coverage to draw graphics presentations, now a lot of players are using the technology covered by the su

Directx Filter Color Smart Switch 自动格式识别转化,能兼容多种视频格式-Directx Filter Color Smart Switch automatically format to identify transformation, compatible with multiple video formats