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/*
* Copyright 2018 Vincent Sanders <vince@netsurf-browser.org>
*
* This file is part of libnspdf.
*
* Licensed under the MIT License,
* http://www.opensource.org/licenses/mit-license.php
*/
/**
* \file
* NetSurf PDF library pdf document
*/
#ifndef NSPDF__PDF_DOC_H_
#define NSPDF__PDF_DOC_H_
struct xref_table_entry;
struct page_table_entry;
/**
* pdf document
*/
struct nspdf_doc {
const uint8_t *start; /* start of pdf document in input stream */
unsigned int length;
/**
* input data stream
*/
struct cos_stream *stream;
int major;
int minor;
/**
* Indirect object cross reference table
*/
uint64_t xref_table_size;
struct xref_table_entry *xref_table;
struct cos_object *root;
struct cos_object *encrypt;
struct cos_object *info;
struct cos_object *id;
/* page refrerence table */
uint64_t page_table_size;
struct page_table_entry *page_table;
};
/* byte data acessory, allows for more complex buffer handling in future */
#define DOC_BYTE(doc, offset) (doc->start[(offset)])
static inline uint8_t
stream_byte(struct cos_stream *stream, unsigned int offset)
{
return *(stream->data + offset);
}
/* helpers in pdf_doc.c */
nspdferror nspdf__stream_skip_ws(struct cos_stream *stream, uint64_t *offset);
nspdferror doc_skip_eol(struct nspdf_doc *doc, uint64_t *offset);
nspdferror doc_read_uint(struct nspdf_doc *doc, uint64_t *offset_out, uint64_t *result_out);
/* cross reference table handlers */
/**
* parse xref from file
*/
nspdferror nspdf__xref_parse(struct nspdf_doc *doc, uint64_t *offset_out);
/**
* get an object dereferencing through xref table if necessary
*/
nspdferror nspdf__xref_get_referenced(struct nspdf_doc *doc, struct cos_object **cobj_out);
nspdferror nspdf__xref_allocate(struct nspdf_doc *doc, int64_t size);
nspdferror nspdf__decode_page_tree(struct nspdf_doc *doc, struct cos_object *page_tree_node, unsigned int *page_index);
/* cos stream filters */
nspdferror nspdf__cos_stream_filter(struct nspdf_doc *doc, const char *filter_name, struct cos_stream **stream_out);
#endif
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