19	Paletted Image (256 Colors)
20	8 Bits Grayscale
22	16 Bits (RGBA)
23	32 Bits (RGBA)
24	Unknown
25	24 Bits (RGB)
26	Targa
27	Bitmap I/O
28	Targa Image File
29	Unsupported Targa Format
30	Error Writing Targa File
31	Error Reading Targa File
32	Targa file I/O (Discreet)
33	TGA File Interface
34	Get color depth
35	Set color depth
36	Get alpha split
37	Set alpha split
38	Get pre-multiplied alpha
39	Set pre-multiplied alpha
40	Get compressed
41	Set compressed