Whats the difference between pixmap and texture?
Textures are the same in FengGUI as what people commonly think of textures. However, pixmaps are sub-areas on textures in FengGUI. The reason for introducing pixmaps was that FengGUI addresses the need of many small sprites and icons that are usually involved in GUIs. For example, a single pre-rendered character on a texture is described by a pixmap.