void
fz_grow_buffer(fz_context *ctx, fz_buffer *buf)
{
int newsize = (buf->cap * 3) / 2;
if (newsize == 0)
newsize = 256;
fz_resize_buffer(ctx, buf, newsize);
}
static void
fz_ensure_buffer(fz_context *ctx, fz_buffer *buf, int min)
{
int newsize = buf->cap;
while (newsize < min)
{
newsize = (newsize * 3) / 2;
}
fz_resize_buffer(ctx, buf, newsize);
}
fz_buffer *
fz_keep_buffer(fz_context *ctx, fz_buffer *buf)
{
if (buf)
{
if (buf->refs == 1 && buf->cap > buf->len+1)
fz_resize_buffer(ctx, buf, buf->len);
buf->refs ++;
}
return buf;
}
static int stream_deflate(pdf_document *xref,fz_context *ctx,int pageref,int pagegen,
int *length)
{
fz_buffer *strbuf;
int n;
unsigned char *p;
#ifdef HAVE_Z_LIB
char tempfile[512];
gzFile gz;
FILE *f;
int nw;
#endif
strbuf=pdf_load_stream(xref,pageref,pagegen);
n=fz_buffer_storage(ctx,strbuf,&p);
#ifdef HAVE_Z_LIB
wfile_abstmpnam(tempfile);
gz=gzopen(tempfile,"sab7");
gzwrite(gz,p,n);
gzclose(gz);
nw=wfile_size(tempfile);
fz_resize_buffer(ctx,strbuf,nw+1);
fz_buffer_storage(ctx,strbuf,&p);
f=fopen(tempfile,"rb");
if (f==NULL || fread(p,1,nw,f)<nw)
aprintf(ANSI_RED "** wmupdf: Error writing compressed stream to PDF file! **\n" ANSI_NORMAL);
if (f!=NULL)
fclose(f);
remove(tempfile);
p[nw]='\n';
strbuf->len=nw+1;
pdf_update_stream(xref,pageref,strbuf);
fz_drop_buffer(ctx,strbuf);
/*
printf(" After drop, xref->table[%d].stm_buf=%p, refs=%d\n",pageref,xref->table[pageref].stm_buf,
xref->table[pageref].stm_buf->refs);
*/
(*length)=nw;
return(1);
#else
fz_drop_buffer(ctx,strbuf);
(*length)=n;
return(0);
#endif
}
static void
pdf_prepend_ap_background(fz_buffer *content, pdf_xref *xref, fz_obj *obj)
{
fz_context *ctx = xref->ctx;
pdf_xobject *form;
int i;
fz_obj *ap = pdf_get_ap_stream(xref, obj);
if (!ap)
return;
if (pdf_load_xobject(&form, xref, ap) != fz_okay)
return;
for (i = 0; i < form->contents->len - 3 && memcmp(form->contents->data + i, "/Tx", 3) != 0; i++);
if (i == form->contents->len - 3)
i = form->contents->len;
if (content->cap < content->len + i)
fz_resize_buffer(ctx, content, content->len + i);
memcpy(content->data + content->len, form->contents->data, i);
content->len += i;
pdf_drop_xobject(ctx, form);
}
void
fz_trim_buffer(fz_context *ctx, fz_buffer *buf)
{
if (buf->cap > buf->len+1)
fz_resize_buffer(ctx, buf, buf->len);
}
void
fz_grow_buffer(fz_buffer *buf)
{
fz_resize_buffer(buf, (buf->cap * 3) / 2);
}
void
fz_grow_buffer(fz_context *ctx, fz_buffer *buf)
{
fz_resize_buffer(ctx, buf, (buf->cap * 3) / 2);
}