Type42 was based on the PostScript language for displaying TrueType fonts. It allows for printing all TrueType fonts on PostScript printers and allows for rasterization when displayed. All changes in font structure occur with PostScript procedures. It supports multibyte TrueType fonts in Chinese, Korean and Japanese.
BMP is format for storing bitmap images. In this format, you can only save bitmaps monolayer. For each pixel in different files may come different number of bits. The latest versions of the BMP has the ability to control color. In particular, you can specify the endpoints perform gamma correction and embed color profiles ICC.