3 ------------------------[ Tutorial about logos files ]-------------------------
4 nol (operator logo) and ngg (caller logo) files include the header as few
5 first bytes of their content. That is 16 or 20 bytes structure. Header
6 contains type of the file, netcode, width and height of icon. But width and
7 height of icon is very important. Why? Because in NOKIA 7110, width = 72 bytes
8 and height = 28 lines, and in other NOKIA phones witdh = 72 bytes, but height
9 is only 14 lines ( thx for that info to Gabriele Zappi ).
13 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
14 N O L 0 1 0 x 0 1 0 x 0 x 0 1 0 1 0 x 0
17 first 3 bytes that's type of file
18 next 3 bytes (4,5,6) - nothing important
19 next 4 (7,8,9,10) - network code :
20 sprintf(netcode, "%d %02d", header[7] + 256 * header[8], header[9]);
21 <<<<<<<<<<< this line is from common/gsm-common.h >>>>>>>>>>>
23 next 3 (11,12,13) - very important bytes :
24 width of icon = header[11]
25 height of icon = header[13]
26 another 7 bytes (14,15,..,20) - I think that's nothing special
30 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
31 N G G 0 1 0 x 0 x 0 1 0 1 0 x 0
34 first 3 bytes that's type of file
35 next 3 bytes (4,5,6) - nothing important
36 next 3 (7,8,9) - very important
37 width of icon = header[7]
38 height of icon = header[9]
39 another 7 bytes (10,11,..,16) - nothing special
43 To show icon on terminal you can read (height) times 72 bytes line and print
44 these lines in the terminal:
47 for (i = 0; i < heigth; i++) {
48 read(buffer, 1, width, fd);
49 printf("%s\n", buffer);
53 ------------------[ 2001 crayola <--> szuflandia corporation ]-----------------
54 crayola@polbox.com klepacz@juni.gliwice.pl