-#define RGTC_DEBUG 0
-
-static void unsigned_encode_rgtc_chan(GLubyte *blkaddr, GLubyte srccolors[4][4],
- GLint numxpixels, GLint numypixels);
-static void signed_encode_rgtc_chan(GLbyte *blkaddr, GLbyte srccolors[4][4],
- GLint numxpixels, GLint numypixels);
-
-static void unsigned_fetch_texel_rgtc(unsigned srcRowStride, const GLubyte *pixdata,
- unsigned i, unsigned j, GLubyte *value, unsigned comps);
-
-static void signed_fetch_texel_rgtc(unsigned srcRowStride, const GLbyte *pixdata,
- unsigned i, unsigned j, GLbyte *value, unsigned comps);
-
-static void extractsrc_u( GLubyte srcpixels[4][4], const GLchan *srcaddr,