RY04@DKAUNI11.BITNET (03/20/89)
in article <0317891715.KSR|CLJ@HARVARD.HARVARD.EDU> 00000100 has been asked for the format of GDOS fonts. 00000200 00000300 here it is: 00000400 00000500 typedef struct 00000600 { 00000700 int font_id; /* number of font, standard is : 00000800 01 - SYSTEM 00000900 02 - SWISS 00001000 14 - DUTCH 00001100 15 - TYPEWRITER */ 00001200 int point; /* size in point mesurement */ 00001300 char name[32]; /* name of font. In the first 00001400 16 chars there is written the 00001500 name itself, in the rest there 00001600 is written the typeface */ 00001700 unsigned int first_ade; /* first character in font */ 00001800 unsigned int last_ade; /* last character in font */ 00001900 unsigned int top; /* difference topline<->baseline */ 00002000 unsigned int ascent; /* difference ascent<->baseline */ 00002010 unsigned int half; /* difference halfline<->baseline */ 00002020 unsigned int descent; /* difference descentl<->baseline */ 00002030 unsigned int bottom; /* difference bottoml<->baseline */ 00002040 unsigned int max_charwidth;/* max char width */ 00002050 unsigned int max_cellwidth;/* max cell width */ 00002060 unsigned int left_offset; /* left offset for cursive */ 00002070 unsigned int right_offset; /* right offset for cur */ 00002080 unsigned int thicken; /* factor for bold */ 00002090 unsigned int ul_size; /* thickness of underline */ 00002091 unsigned int lighten; /* mask for lightened style */ 00002092 unsigned int skew; /* mask for cursive style */ 00002093 unsigned int flags; /* Bit 0 : default system font 00002094 Bit 1 : use "horizontal offset 00002100 table 00002200 Bit 2 : Intel format (0) or Moto- 00002300 rola format (1). GDOS 00002400 fonts MUST be in Moto- 00002500 rola !! */ 00002600 unsigned int *hor_table; /* pointer to "horizontal offset 00002700 table"; in a file the offset 00002800 to its beginning */ 00002900 unsigned int *off_table; /* pointer to "character offset 00003000 table" */ 00003100 unsigned int *dat_table; /* pointer to font image */ 00003200 unsigned int form_width; /* width of font image */ 00003300 unsigned int form_heigth; /* height of font image */ 00003400 FONT_HDR *nextfont; /* pointer to next fontheader 00003500 (in a font file not used) */ 00003600 unsigned int font_seg; /* so called "ATARI DATA FLAG" ??*/ 00003700 } FONT_HDR; 00003800 00003900 I hope this will help you... 00004000 00004100 Valli 00004200 00004300 00004400 00004500 00004600
kbad@atari.UUCP (Ken Badertscher) (03/27/89)
The unsigned int font_seg variable which was (unfortunately) included in
some GDOS documentation does not belong there. It is an internal
variable which is only used by GDOS. Actual font headers on disk should
end after the "next_font" longword.
One other thing you should know about GDOS fonts... the font data is
NOT guaranteed to be contiguous with the end of the header. Whether on
disk or in memory, pointers/offsets are provided in the font header.
Use them! (Except the memory ones... you really should leave the
manipulation of font data loaded in memory up to the VDI...)
--
Ken Badertscher | #include <disclaimer>
Atari R&D Software Engine | GEMDOS LIVES! ...or is that Frodo?
{portal,ames,imagen}!atari!kbad | I can never remember these things...