ref: 5a6ed7f45e6d79d0a555c26ac87b0c0c2f0bfc6d dir: /i_tga.h/
int TGA_Encode(byte **out, char *id, pixel_t *pix, int w, int h); qpic_t *TGA_Decode(byte *in, int sz, bool *premultalpha);