Basically it seems coherent with the luatex manual (ch. 7 Font structure):
luatex read the txr.tfm file and set the checksum to the unsigned int 0
(luafont.w ,int font_from_lua(lua_State * L, int f)) (but see Note below)
Then read the vf
(dofont.w, do_vf(f) inside static int do_define_font(int f, const char
*cnom, scaled s, int natural_dir))
do_vf(f) calculate the checksum of the vf file vua test_checksum() macro,
and find that the vf file has checksum
210 43 124 230 =>(210*2^24)+(43*2^16)+(124*2^8)+230=3526065382= oct 32212676346
vs
128 0 0 0
and hence the warning of mismatch.
Note:
The last sequence 128 0 0 0 (i.e. 0) it is due to
i = numeric_field(L, "checksum", 0);
set_font_checksum(f, (unsigned) i);
where
static int numeric_field(lua_State * L, const char *name, int dflt)
{
int i = dflt;
lua_pushstring(L, name);
lua_rawget(L, -2);
if (lua_isnumber(L, -1)) {
i = lua_roundnumber(L, -1);
}
lua_pop(L, 1);
return i;
}
and
#define lua_roundnumber(a,b) (int)floor((double)lua_tonumber(L,-1)+0.5)
I think one can avoid the warning if set the checksum field to the
correct value by the define_font callback on the lua side.
--
luigi
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