static int add_to_srcpage_stream(pdf_document *xref,fz_context *ctx,int pageref,int pagegen,
pdf_obj *srcdict)
{
fz_buffer *srcbuf;
fz_buffer *dstbuf;
int dstlen;
// printf("@add_to_srcpage_stream()...pageref=%d\n",pageref);
srcbuf=pdf_load_stream(xref,pdf_to_num(srcdict),pdf_to_gen(srcdict));
if (srcbuf==NULL)
{
dstbuf=pdf_load_stream(xref,pageref,pagegen);
if (dstbuf==NULL)
return(0);
dstlen=fz_buffer_storage(ctx,dstbuf,NULL);
fz_drop_buffer(ctx,dstbuf);
return(dstlen);
}
if (!pdf_is_stream(xref,pageref,pagegen))
dstbuf=fz_new_buffer(ctx,16);
else
{
dstbuf=pdf_load_stream(xref,pageref,pagegen);
if (dstbuf==NULL)
dstbuf=fz_new_buffer(ctx,16);
}
/* Concatenate srcbuf to dstbuf: (Will srcbuf->data be allowed?) */
dstlen=fz_buffer_storage(ctx,dstbuf,NULL);
/*
printf(" dstlen before = %d\n",dstlen);
printf(" srclen = %d\n",fz_buffer_storage(ctx,srcbuf,NULL));
printf(" srcptr = %p\n",srcbuf->data);
*/
fz_write_buffer(ctx,dstbuf,srcbuf->data,fz_buffer_storage(ctx,srcbuf,NULL));
dstlen=fz_buffer_storage(ctx,dstbuf,NULL);
// printf(" dstlen after = %d\n",dstlen);
fz_drop_buffer(ctx,srcbuf);
pdf_update_stream(xref,pageref,dstbuf);
fz_drop_buffer(ctx,dstbuf);
return(dstlen);
}
static int new_stream_object(pdf_document *xref,fz_context *ctx,char *buf)
{
int ref;
pdf_obj *obj,*len;
fz_buffer *fzbuf;
ref = pdf_create_object(xref);
obj = pdf_new_dict(ctx,1);
len=pdf_new_int(ctx,strlen(buf));
pdf_dict_puts(obj,"Length",len);
pdf_drop_obj(len);
pdf_update_object(xref,ref,obj);
pdf_drop_obj(obj);
fzbuf=fz_new_buffer(ctx,strlen(buf));
fz_write_buffer(ctx,fzbuf,(unsigned char *)buf,strlen(buf));
pdf_update_stream(xref,ref,fzbuf);
fz_drop_buffer(ctx,fzbuf);
return(ref);
}
static unsigned char *
gif_read_subblocks(fz_context *ctx, struct info *info, unsigned char *p, unsigned char *end, fz_buffer *buf)
{
int len;
do
{
if (end - p < 1)
fz_throw(ctx, FZ_ERROR_GENERIC, "premature end in data subblocks in gif image");
len = *p;
p += 1;
if (len > 0)
{
if (end - p < len)
fz_throw(ctx, FZ_ERROR_GENERIC, "premature end in data subblock in gif image");
if (buf)
fz_write_buffer(ctx, buf, p, len);
p += len;
}
} while (len > 0);
return p;
}
static void
buffer_write(fz_context *ctx, void *opaque, const void *data, int len)
{
fz_buffer *buffer = opaque;
fz_write_buffer(ctx, buffer, data, len);
}
