dithering(抖动)
directional light，方向性光源
dme: direct memory execute(直接内存执行)
dof(depth of field，多重境深)
dot texture blending(点型纹理混和)
double buffering(双缓冲区)
dir(direct rendering infrastructure，基层直接渲染)
dvi(digital video interface，数字视频接口)
dxr: dynamicxtended resolution(动态可扩展分辨率)
dxtc(direct x texture compress，directx纹理压缩，以s3tc为基础)
