nanogui: Thread: segfault creating font from .fnt file

Hi,
I haven't been able to successfully load a bdf file agter converting it on .fnt file.
I tried the t1demo and also get a segfault with it.

Has anyone ran into this problem? Is loading .fnt file working?

####################################################################
# native .fnt loadable font support
####################################################################
HAVE_FNT_SUPPORT         = Y
HAVE_FNTGZ_SUPPORT       = N
FNT_FONT_DIR             = "fonts/bdf"


and 
FNTNAME "/fonts/bdf/font.fnt"

Thanks.

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> I haven't been able to successfully load a bdf file agter converting it on
.fnt file.

IIRC someone mentioned there might be an endian problem
with .fnt loading, make sure you're running the CVS code.
Otherwise, post your target specs.


> I tried the t1demo and also get a segfault with it.

That was known working, perhaps there's an endian bug also?
Are you running big endian?

FNT_FONT_DIR             = "fonts/bdf"
FNTNAME "/fonts/bdf/font.fnt"

Try using a full path spec when loading.  I'm not familiar
with FNTNAME.

Regards,

Greg

> -----Original Message-----
> From: ####@####.####
> Sent: Mon, 11 Jun 2007 13:46:04 -0800
> To: ####@####.####
> Subject: [nanogui] segfault creating font from .fnt file
> 
> Hi,
> I haven't been able to successfully load a bdf file agter converting it
> on .fnt file.
> I tried the t1demo and also get a segfault with it.
> 
> Has anyone ran into this problem? Is loading .fnt file working?
> 
> ####################################################################
> # native .fnt loadable font support
> ####################################################################
> HAVE_FNT_SUPPORT         = Y
> HAVE_FNTGZ_SUPPORT       = N
> FNT_FONT_DIR             = "fonts/bdf"
> 
> 
> and
> FNTNAME "/fonts/bdf/font.fnt"
> 

Perhaps I'm misunderstanding this but for these fonts, which are fixed size, I assume the
height will be 0. correct? as in 
GrCreateFont(FONTNAME, 0, NULL);

I'm getting a segfaule because the GdCreateFonts returns 0 at :

/* check builtin fonts first for speed*/
    if (!height && (fontclass == MWLF_CLASS_ANY || fontclass == MWLF_CLASS_BUILTIN)) {
        for(i = 0; i < scrinfo.fonts; ++i) {
            if(!strcmpi(pf[i].name, fontname)) {
                pf[i].fontsize = pf[i].cfont->height;
                pf[i].fontattr = fontattr;
                EPRINTF("1 createfont: (height == 0) found builtin font %s (%d)\n", fontname, i);
                return (PMWFONT)&pf[i];
            }
        }
        /*
         * Specified height=0 and no builtin font matched name.
         * if not font found with other renderer, no font
         * will be loaded, and 0 returned.
         *
         * We used to return the first builtin font.  If a font
         * return needs to be guaranteed, specify a non-zero
         * height, and the closest builtin font to the specified
         * height will always be returned.
         */
    }

Any size I use returns "not found". Am I using this correctly?

Thanks.

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> -----Original Message-----
> From: ####@####.####
> Sent: Mon, 11 Jun 2007 16:49:15 -0600
> To: ####@####.#### ####@####.####
> Subject: Re: [nanogui] segfault creating font from .fnt file
> 
>> I haven't been able to successfully load a bdf file agter converting it
>> on
> .fnt file.
> 
> IIRC someone mentioned there might be an endian problem
> with .fnt loading, make sure you're running the CVS code.
> Otherwise, post your target specs.
> 
> 
>> I tried the t1demo and also get a segfault with it.
> 
> That was known working, perhaps there's an endian bug also?
> Are you running big endian?

No, I'm running little endian, ARM922


> FNT_FONT_DIR             = "fonts/bdf"
> FNTNAME "/fonts/bdf/font.fnt"
> 
> Try using a full path spec when loading.  I'm not familiar
> with FNTNAME.

It's really a #define FNTNAME, I guess I copied this incorrectly.
The font is really a courB10.bdf. I tried the pcf files used by the demo 
and the pcf loader is doing the same thing.

Thanks.

Well, if you're falling through the for() loop below, it means
that your font name isn't matching.  In the builtin case, its
not supposed to be a path, just a simple text string.  Stick
some printfs in the loop to see why the match isn't matching.
Make sure your name is specified in genfont.c.

Also, you could always return &pf[0] rather than 0 in the
non-match case, that will get you the first builtin font.

Regards,

Greg


> FNTNAME "/fonts/bdf/font.fnt"
>

Perhaps I'm misunderstanding this but for these fonts, which are fixed size,
I assume the
height will be 0. correct? as in
GrCreateFont(FONTNAME, 0, NULL);

I'm getting a segfaule because the GdCreateFonts returns 0 at :

/* check builtin fonts first for speed*/
    if (!height && (fontclass == MWLF_CLASS_ANY || fontclass ==
MWLF_CLASS_BUILTIN)) {
        for(i = 0; i < scrinfo.fonts; ++i) {
            if(!strcmpi(pf[i].name, fontname)) {
                pf[i].fontsize = pf[i].cfont->height;
                pf[i].fontattr = fontattr;
                EPRINTF("1 createfont: (height == 0) found builtin font %s
(%d)\n", fontname, i);
                return (PMWFONT)&pf[i];
            }
        }
        /*
         * Specified height=0 and no builtin font matched name.
         * if not font found with other renderer, no font
         * will be loaded, and 0 returned.
         *
         * We used to return the first builtin font.  If a font
         * return needs to be guaranteed, specify a non-zero
         * height, and the closest builtin font to the specified
         * height will always be returned.
         */
    }

Any size I use returns "not found". Am I using this correctly?

>It's really a #define FNTNAME, I guess I copied this incorrectly.
The font is really a courB10.bdf. I tried the pcf files used by the demo 
and the pcf loader is doing the same thing.

Make sure you're running CVS.  We may need a backtrace to
see where its crashing.

Regards,

Greg

> -----Original Message-----
> From: ####@####.####
> Sent: Mon, 11 Jun 2007 23:08:28 -0600
> To: ####@####.#### ####@####.####
> Subject: Re: [nanogui] segfault creating font from .fnt file
> 
> >It's really a #define FNTNAME, I guess I copied this incorrectly.
> The font is really a courB10.bdf. I tried the pcf files used by the demo
> and the pcf loader is doing the same thing.
> 
> Make sure you're running CVS.  We may need a backtrace to
> see where its crashing.

Thanks Grep,
Its a "user error", I made a mistake on of the files and the compiler didn't
flag it.
The t1demo works fine now and I'm about to try the .fnt option.

Thanks,
--jr.

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