fz_error *
fz_chainpipeline(fz_filter **fp, fz_filter *head, fz_filter *tail, fz_buffer *buf)
{
FZ_NEWFILTER(fz_pipeline, p, pipeline);
p->head = fz_keepfilter(head);
p->tail = fz_keepfilter(tail);
p->tailneedsin = 1;
p->buffer = fz_keepbuffer(buf);
return nil;
}
fz_error *
fz_newpipeline(fz_filter **fp, fz_filter *head, fz_filter *tail)
{
fz_error *error;
FZ_NEWFILTER(fz_pipeline, p, pipeline);
p->head = fz_keepfilter(head);
p->tail = fz_keepfilter(tail);
p->tailneedsin = 1;
error = fz_newbuffer(&p->buffer, FZ_BUFSIZE);
if (error) { fz_free(p); return error; }
return nil;
}
void
fz_unchainpipeline(fz_filter *filter, fz_filter **oldfp, fz_buffer **oldbp)
{
fz_pipeline *p = (fz_pipeline*)filter;
*oldfp = fz_keepfilter(p->head);
*oldbp = fz_keepbuffer(p->buffer);
fz_dropfilter(filter);
}
fz_error fz_openrfilter(fz_stream **stmp, fz_filter *flt, fz_stream *src)
{
fz_error error;
fz_stream *stm;
stm = newstm(FZ_SFILTER);
if (!stm)
return fz_rethrow(-1, "out of memory: stream struct");
error = fz_newbuffer(&stm->buffer, FZ_BUFSIZE);
if (error)
{
fz_free(stm);
return fz_rethrow(error, "cannot create buffer");
}
stm->chain = fz_keepstream(src);
stm->filter = fz_keepfilter(flt);
*stmp = stm;
return fz_okay;
}
static fz_error *
openfilter(fz_stream **stmp, fz_filter *flt, fz_stream *src, int mode)
{
fz_error *error;
fz_stream *stm;
stm = newstm(FZ_SFILTER, mode);
if (!stm)
return fz_throw("outofmem: stream struct");
error = fz_newbuffer(&stm->buffer, FZ_BUFSIZE);
if (error)
{
fz_free(stm);
return fz_rethrow(error, "cannot create buffer");
}
stm->chain = fz_keepstream(src);
stm->filter = fz_keepfilter(flt);
*stmp = stm;
return fz_okay;
}
