Re: Dubious "checksum mismatch" message on log file

[luigi scarso <luigi.scarso@gmail.com>]

On Wed, Feb 1, 2012 at 10:54 AM, luigi scarso <luigi.scarso@gmail.com> wrote:
> On Wed, Feb 1, 2012 at 10:21 AM, Vladimir Lomov <lomov.vl@gmail.com> wrote:
>> Hello,
>> ** luigi scarso [2012-02-01 08:45:18 +0100]:
>>
>>> On Wed, Feb 1, 2012 at 7:00 AM, Vladimir Lomov <lomov.vl@gmail.com> wrote:
>>
>>>> I specially chose that font (txr, txr.tfm and txr.vf files), it is
>>>> distributed by txfonts "package". May be you installation doesn't have
>>>> them because I installed context suite with './first-setup.sh --modules=all'.
>>
>>>> Nevertheless, that 'Font ... at 600 ...' reminds me how pdftex (pdflatex
>>>> actually) deals with tfm/mf/pk fonts (generate pk and insert them into
>>>> pdf file).
>>> Even with --modules=all'
>>> LuaTeX warning (file rtxptmr): Font rtxptmr at 600 not found
>>> and
>>> $> pdffonts test.pdf
>>
>>> name                                 type              emb sub uni object ID
>>> ------------------------------------ ----------------- --- --- --- ---------
>>> Error: font resource is not a dictionary
>>> JFRMQG+LMRoman10-Regular             CID Type 0C       yes yes yes     18  0
>>
>>> It seems that this font is not a font of the suite.
>>
>> Let me stess it in other words: this ("Font ... not found") is not the
>> topic of thread. It is completely inrelated (IMHO) with vf font
>> problem (vf font leads to that "checksum" message). I took that font
>> because it has corresponding vf file.
> ok it was just to have as much data as possible.
>
> We have
>
> $>vftovp txr.vf
> (VTITLE )
> (FAMILY TXR)
> (FACE F MRR)
> (CODINGSCHEME TEX TEXT)
> (DESIGNSIZE R 10.0)
> (COMMENT DESIGNSIZE IS IN POINTS)
> (COMMENT OTHER SIZES ARE MULTIPLES OF DESIGNSIZE)
> (CHECKSUM O 32212676346)
>
> while from  luatex source
>
> source/texk/web2c/luatexdir/font/vfovf.w:
> @ process a local font in \.{VF} file
> @c
> static internal_font_number
> vf_def_font(internal_font_number f, unsigned char *vf_buffer, int *vf_cr)
> {
> :
> unsigned long checksum;
>    cs.b0 = vf_buffer[(*vf_cr)];
>    cs.b1 = vf_buffer[(*vf_cr) + 1];
>    cs.b2 = vf_buffer[(*vf_cr) + 2];
>    cs.b3 = vf_buffer[(*vf_cr) + 3];
>    (*vf_cr) += 4;
>    checksum = (unsigned)
>        (cs.b0 * 256 * 256 * 256 + cs.b1 * 256 * 256 + cs.b2 * 256 + cs.b3);
> :
>
> if (checksum != 0 && font_checksum(k) != 0
>            && checksum != font_checksum(k))
>            vf_local_font_warning(f, k, "checksum mismatch", (int) checksum,
>                                  (int) font_checksum(k));
>        if (ds != font_dsize(k))
>            vf_local_font_warning(f, k, "design size mismatch", ds,
>                                  font_dsize(k));
>
Sorry, it's not the right point:
it's this one:

@ some of these things happen twice, adding a define is simplest

@c
#define test_checksum()  { vf_byte(tmp_b0); vf_byte(tmp_b1);    \
    vf_byte(tmp_b2); vf_byte(tmp_b3);         \
    if (((tmp_b0 != 0) || (tmp_b1 != 0) || (tmp_b2 != 0) || (tmp_b3 != 0)) && \
  ((font_check_0(f) != 0) || (font_check_1(f) != 0) ||    \
   (font_check_2(f) != 0) || (font_check_3(f) != 0)) &&   \
  ((tmp_b0 != font_check_0(f)) || (tmp_b1 != font_check_1(f)) ||  \
   (tmp_b2 != font_check_2(f)) || (tmp_b3 != font_check_3(f)))) { \
      print_nlp();              \
      tprint("checksum mismatch in font ");     \
      tprint(font_name(f));         \
      tprint(".vf ignored "); } }


-- 
luigi
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