07/10/08 23:17:39
gluBuild2DMipmapsは任意のサイズの元画像を2^n乗のサイズに拡大縮小する
URLﾘﾝｸ(www.opengl.org)
＞Initially, the width and height of data are checked to see if they are a power of 2.
＞If not, a copy of data (not data), is scaled up or down to the nearest power of 2.