thanx John,
for everyone who is interested in :
its ticket no #1716
"MS_NINT assembly macro is broken"
and as you mentioned its fixed in 4.10
as a quick and dirty hack :
look for this block in "map.h" and comment it out :
(only if your running mapserver version 4.6!)
------------------BLOCK-START---------------------
#if defined(WE_HAVE_THE_C99_LRINT)
# define MS_NINT(x) lrint(x)
#elif defined(_MSC_VER) && defined(_WIN32) && !defined(USE_GENERIC_MS_NINT)
static __inline long int MS_NINT (double flt)
{ int intgr;
_asm
{ fld flt
fistp intgr
} ;
return intgr ;
}
#elif defined(i386) && defined(__GNUC_PREREQ) &&
!defined(USE_GENERIC_MS_NINT)
static __inline long int MS_NINT( double __x )
{
long int __lrintres;
__asm__ __volatile__
("fistpl %0"
: "=m" (__lrintres) : "t" (__x) : "st");
return __lrintres;
}
#else
# define MS_NINT(x) ((x) >= 0.0 ? ((long) ((x)+.5)) : ((long)
((x)-.5)))
#endif
------------------BLOCK-END---------------------
leave only this define statement uncommented
#define MS_NINT(x) ((x) >= 0.0 ? ((long) ((x)+.5)) : ((long) ((x)-.5)))
and just recompile your mapserver !
regards
ronald
John Cole schrieb:
Ronald,
There was an issue with a math library in 4.6-4.8. If you try that in 4.4
or 4.10, that issue isn't there. If the bug tracker is up, you should be
able to find more information on it.
The issue was a problem with the round function, if I remember correctly
and could cause the very problem your seeing. My examples were with squares
on squares.
John
"R. Müller" wrote:
Hi,
i've got a question concerning rendering symbols in mapserver. I'm
working with mapserver 4.6 mostly on linux-based maschines and noticed
that under certain circumstances the rendering of point symbols is quit
inexactly.
in the following test-case i wanted to draw gray-filled circles with a
black border. in this case i didn't used the newer style-syntax but the
result is quit the same. in the rendered image the two cirlces (inner
circle and border are not located in the same origin, one circle is
shifted for some pixels)
--
*****************************************************************
*M-UniComp Verkehrssysteme GmbH
*
*Dipl.-Ing. Ronald Müller
*Softwareentwicklung
*
*Plauener Straße 163-165, Haus 11
*13053 Berlin
*
*fon : +49 ( 0 ) 30 / 98 31 700 70
*fax : +49 ( 0 ) 30 / 98 31 700 77
*mobil : +49 ( 0 ) 172 / 93 95 004
*email : [EMAIL PROTECTED]
*web : www.unicomp-berlin.de
*
*Geschaeftsfuehrer: Andreas Dreher
*Sitz der Gesellschaft: Berlin
*Registergericht: Berlin Amtsgericht Charlottenburg, HRB 35329
*****************************************************************
