FreeType glyph image formats and default raster interface for Linux.

XWDFile.h MIT Project Athena, X Window system window raster image dumper, dump file format header file.

用于开发和维护用于读取、创建和操作PNG（便携式网络图形）光栅图像文件的应用程序的参考库(This is to develop and maintain the reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files.)