# To subscribers of the xforms list from Yann Guichoux <guichoux@shom.fr> :
Steve Lamont wrote:
>
> # To subscribers of the xforms list from spl@szechuan.ucsd.edu (Steve Lamont) :
>
> > I think i got a bug with fl_popen & fl_pclose functions.
> >
> > I spawn a process using popen ...
> > I write to it some data
> > I close the process using pclose
> >
> > Everything works fine...
> >
> > When i use fl_popen & fl_pclose instead of popen &pclose...the child
> > process jams...
>
> I noticed something similar when playing with it myself. There are a
> couple of things I don't understand in the source as of this moment
> in fl_pclose().
>
> If you can provide some simple example code, that would be helpful.
>
> spl
here are the only things i do :
...
sprintf(s_buffer,"%s/bin/mpeg_encode -realquiet
%s",GAIAHOME,_paramFile);
_pw=fl_popen(s_buffer,"w");
for (i=0; i<10 ; i++)
{
writePPM(fl_image[i],_pw);
}
fl_pclose(_pw);
...............
with this "writeFunction"
void writePPM(FL_IMAGE *fl_image,FILE *fpointer)
{
register int y, x;
unsigned char r,g,b;
/* magic number */
fprintf(fpointer, "P6\n");
/* width, height */
fprintf(fpointer, "%d %d\n", fl_image->w, fl_image->h);
/* max value */
fprintf(fpointer, "255\n");
for ( y = 0; y < fl_image->h; y++ )
{
for ( x = 0; x < fl_image->w; x++ )
{
r=(unsigned char)fl_image->red_lut[fl_image->ci[y][x]];
g=(unsigned char)fl_image->green_lut[fl_image->ci[y][x]];
b=(unsigned char)fl_image->blue_lut[fl_image->ci[y][x]];
fwrite(&r, 1, 1, fpointer);
fwrite(&g, 1, 1, fpointer);
fwrite(&b, 1, 1, fpointer);
}
}
}
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