--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/include/mupdf/fitz/document.h	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,1103 @@
+// Copyright (C) 2004-2025 Artifex Software, Inc.
+//
+// This file is part of MuPDF.
+//
+// MuPDF is free software: you can redistribute it and/or modify it under the
+// terms of the GNU Affero General Public License as published by the Free
+// Software Foundation, either version 3 of the License, or (at your option)
+// any later version.
+//
+// MuPDF is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+// FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
+// details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with MuPDF. If not, see <https://www.gnu.org/licenses/agpl-3.0.en.html>
+//
+// Alternative licensing terms are available from the licensor.
+// For commercial licensing, see <https://www.artifex.com/> or contact
+// Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
+// CA 94129, USA, for further information.
+
+#ifndef MUPDF_FITZ_DOCUMENT_H
+#define MUPDF_FITZ_DOCUMENT_H
+
+#include "mupdf/fitz/system.h"
+#include "mupdf/fitz/types.h"
+#include "mupdf/fitz/context.h"
+#include "mupdf/fitz/geometry.h"
+#include "mupdf/fitz/device.h"
+#include "mupdf/fitz/transition.h"
+#include "mupdf/fitz/link.h"
+#include "mupdf/fitz/outline.h"
+#include "mupdf/fitz/separation.h"
+#include "mupdf/fitz/archive.h"
+
+typedef struct fz_document_handler fz_document_handler;
+typedef struct fz_page fz_page;
+typedef intptr_t fz_bookmark;
+
+typedef enum
+{
+	FZ_MEDIA_BOX,
+	FZ_CROP_BOX,
+	FZ_BLEED_BOX,
+	FZ_TRIM_BOX,
+	FZ_ART_BOX,
+	FZ_UNKNOWN_BOX
+} fz_box_type;
+
+fz_box_type fz_box_type_from_string(const char *name);
+const char *fz_string_from_box_type(fz_box_type box);
+
+/**
+	Simple constructor for fz_locations.
+*/
+static inline fz_location fz_make_location(int chapter, int page)
+{
+	fz_location loc = { chapter, page };
+	return loc;
+}
+
+enum
+{
+	/* 6in at 4:3 */
+	FZ_LAYOUT_KINDLE_W = 260,
+	FZ_LAYOUT_KINDLE_H = 346,
+	FZ_LAYOUT_KINDLE_EM = 9,
+
+	/* 4.25 x 6.87 in */
+	FZ_LAYOUT_US_POCKET_W = 306,
+	FZ_LAYOUT_US_POCKET_H = 495,
+	FZ_LAYOUT_US_POCKET_EM = 10,
+
+	/* 5.5 x 8.5 in */
+	FZ_LAYOUT_US_TRADE_W = 396,
+	FZ_LAYOUT_US_TRADE_H = 612,
+	FZ_LAYOUT_US_TRADE_EM = 11,
+
+	/* 110 x 178 mm */
+	FZ_LAYOUT_UK_A_FORMAT_W = 312,
+	FZ_LAYOUT_UK_A_FORMAT_H = 504,
+	FZ_LAYOUT_UK_A_FORMAT_EM = 10,
+
+	/* 129 x 198 mm */
+	FZ_LAYOUT_UK_B_FORMAT_W = 366,
+	FZ_LAYOUT_UK_B_FORMAT_H = 561,
+	FZ_LAYOUT_UK_B_FORMAT_EM = 10,
+
+	/* 135 x 216 mm */
+	FZ_LAYOUT_UK_C_FORMAT_W = 382,
+	FZ_LAYOUT_UK_C_FORMAT_H = 612,
+	FZ_LAYOUT_UK_C_FORMAT_EM = 11,
+
+	/* 148 x 210 mm */
+	FZ_LAYOUT_A5_W = 420,
+	FZ_LAYOUT_A5_H = 595,
+	FZ_LAYOUT_A5_EM = 11,
+
+	/* Default to A5 */
+	FZ_DEFAULT_LAYOUT_W = FZ_LAYOUT_A5_W,
+	FZ_DEFAULT_LAYOUT_H = FZ_LAYOUT_A5_H,
+	FZ_DEFAULT_LAYOUT_EM = FZ_LAYOUT_A5_EM,
+};
+
+typedef enum
+{
+	FZ_PERMISSION_PRINT = 'p',
+	FZ_PERMISSION_COPY = 'c',
+	FZ_PERMISSION_EDIT = 'e',
+	FZ_PERMISSION_ANNOTATE = 'n',
+	FZ_PERMISSION_FORM = 'f',
+	FZ_PERMISSION_ACCESSIBILITY = 'y',
+	FZ_PERMISSION_ASSEMBLE = 'a',
+	FZ_PERMISSION_PRINT_HQ = 'h',
+}
+fz_permission;
+
+/**
+	Type for a function to be called when
+	the reference count for the fz_document drops to 0. The
+	implementation should release any resources held by the
+	document. The actual document pointer will be freed by the
+	caller.
+*/
+typedef void (fz_document_drop_fn)(fz_context *ctx, fz_document *doc);
+
+/**
+	Type for a function to be
+	called to enquire whether the document needs a password
+	or not. See fz_needs_password for more information.
+*/
+typedef int (fz_document_needs_password_fn)(fz_context *ctx, fz_document *doc);
+
+/**
+	Type for a function to be
+	called to attempt to authenticate a password. See
+	fz_authenticate_password for more information.
+*/
+typedef int (fz_document_authenticate_password_fn)(fz_context *ctx, fz_document *doc, const char *password);
+
+/**
+	Type for a function to be
+	called to see if a document grants a certain permission. See
+	fz_document_has_permission for more information.
+*/
+typedef int (fz_document_has_permission_fn)(fz_context *ctx, fz_document *doc, fz_permission permission);
+
+/**
+	Type for a function to be called to
+	load the outlines for a document. See fz_document_load_outline
+	for more information.
+*/
+typedef fz_outline *(fz_document_load_outline_fn)(fz_context *ctx, fz_document *doc);
+
+/**
+	Type for a function to be called to obtain an outline iterator
+	for a document. See fz_document_outline_iterator for more information.
+*/
+typedef fz_outline_iterator *(fz_document_outline_iterator_fn)(fz_context *ctx, fz_document *doc);
+
+/**
+	Type for a function to be called to lay
+	out a document. See fz_layout_document for more information.
+*/
+typedef void (fz_document_layout_fn)(fz_context *ctx, fz_document *doc, float w, float h, float em);
+
+/**
+	Type for a function to be called to
+	resolve an internal link to a location (chapter/page number
+	tuple). See fz_resolve_link_dest for more information.
+*/
+typedef fz_link_dest (fz_document_resolve_link_dest_fn)(fz_context *ctx, fz_document *doc, const char *uri);
+
+/**
+	Type for a function to be called to
+	create an internal link to a destination (chapter/page/x/y/w/h/zoom/type
+	tuple). See fz_resolve_link_dest for more information.
+*/
+typedef char * (fz_document_format_link_uri_fn)(fz_context *ctx, fz_document *doc, fz_link_dest dest);
+
+/**
+	Type for a function to be called to
+	count the number of chapters in a document. See
+	fz_count_chapters for more information.
+*/
+typedef int (fz_document_count_chapters_fn)(fz_context *ctx, fz_document *doc);
+
+/**
+	Type for a function to be called to
+	count the number of pages in a document. See fz_count_pages for
+	more information.
+*/
+typedef int (fz_document_count_pages_fn)(fz_context *ctx, fz_document *doc, int chapter);
+
+/**
+	Type for a function to load a given
+	page from a document. See fz_load_page for more information.
+*/
+typedef fz_page *(fz_document_load_page_fn)(fz_context *ctx, fz_document *doc, int chapter, int page);
+
+/**
+	Type for a function to get the page label of a page in the document.
+	See fz_page_label for more information.
+*/
+typedef void (fz_document_page_label_fn)(fz_context *ctx, fz_document *doc, int chapter, int page, char *buf, size_t size);
+
+/**
+	Type for a function to query
+	a document's metadata. See fz_lookup_metadata for more
+	information.
+*/
+typedef int (fz_document_lookup_metadata_fn)(fz_context *ctx, fz_document *doc, const char *key, char *buf, size_t size);
+
+/**
+	Type for a function to set
+	a document's metadata. See fz_set_metadata for more
+	information.
+*/
+typedef void (fz_document_set_metadata_fn)(fz_context *ctx, fz_document *doc, const char *key, const char *value);
+
+/**
+	Return output intent color space if it exists
+*/
+typedef fz_colorspace *(fz_document_output_intent_fn)(fz_context *ctx, fz_document *doc);
+
+/**
+	Write document accelerator data
+*/
+typedef void (fz_document_output_accelerator_fn)(fz_context *ctx, fz_document *doc, fz_output *out);
+
+/**
+	Send document structure to device
+*/
+typedef void (fz_document_run_structure_fn)(fz_context *ctx, fz_document *doc, fz_device *dev, fz_cookie *cookie);
+
+/**
+	Get a handle to this document as PDF.
+
+	Returns a borrowed handle.
+*/
+typedef fz_document *(fz_document_as_pdf_fn)(fz_context *ctx, fz_document *doc);
+
+/**
+	Type for a function to make
+	a bookmark. See fz_make_bookmark for more information.
+*/
+typedef fz_bookmark (fz_document_make_bookmark_fn)(fz_context *ctx, fz_document *doc, fz_location loc);
+
+/**
+	Type for a function to lookup a bookmark.
+	See fz_lookup_bookmark for more information.
+*/
+typedef fz_location (fz_document_lookup_bookmark_fn)(fz_context *ctx, fz_document *doc, fz_bookmark mark);
+
+/**
+	Type for a function to release all the
+	resources held by a page. Called automatically when the
+	reference count for that page reaches zero.
+*/
+typedef void (fz_page_drop_page_fn)(fz_context *ctx, fz_page *page);
+
+/**
+	Type for a function to return the
+	bounding box of a page. See fz_bound_page for more
+	information.
+*/
+typedef fz_rect (fz_page_bound_page_fn)(fz_context *ctx, fz_page *page, fz_box_type box);
+
+/**
+	Type for a function to run the
+	contents of a page. See fz_run_page_contents for more
+	information.
+*/
+typedef void (fz_page_run_page_fn)(fz_context *ctx, fz_page *page, fz_device *dev, fz_matrix transform, fz_cookie *cookie);
+
+/**
+	Type for a function to load the links
+	from a page. See fz_load_links for more information.
+*/
+typedef fz_link *(fz_page_load_links_fn)(fz_context *ctx, fz_page *page);
+
+/**
+	Type for a function to
+	obtain the details of how this page should be presented when
+	in presentation mode. See fz_page_presentation for more
+	information.
+*/
+typedef fz_transition *(fz_page_page_presentation_fn)(fz_context *ctx, fz_page *page, fz_transition *transition, float *duration);
+
+/**
+	Type for a function to enable/
+	disable separations on a page. See fz_control_separation for
+	more information.
+*/
+typedef void (fz_page_control_separation_fn)(fz_context *ctx, fz_page *page, int separation, int disable);
+
+/**
+	Type for a function to detect
+	whether a given separation is enabled or disabled on a page.
+	See FZ_SEPARATION_DISABLED for more information.
+*/
+typedef int (fz_page_separation_disabled_fn)(fz_context *ctx, fz_page *page, int separation);
+
+/**
+	Type for a function to retrieve
+	details of separations on a page. See fz_get_separations
+	for more information.
+*/
+typedef fz_separations *(fz_page_separations_fn)(fz_context *ctx, fz_page *page);
+
+/**
+	Type for a function to retrieve
+	whether or not a given page uses overprint.
+*/
+typedef int (fz_page_uses_overprint_fn)(fz_context *ctx, fz_page *page);
+
+
+/**
+	Type for a function to create a link on a page.
+*/
+typedef fz_link *(fz_page_create_link_fn)(fz_context *ctx, fz_page *page, fz_rect bbox, const char *uri);
+
+/**
+	Type for a function to delete a link on a page.
+*/
+typedef void (fz_page_delete_link_fn)(fz_context *ctx, fz_page *page, fz_link *link);
+
+/**
+	Function type to open a
+	document from a file.
+
+	handler: the document handler in use.
+
+	stream: fz_stream to read document data from. Must be
+	seekable for formats that require it.
+
+	accel: fz_stream to read accelerator data from. May be
+	NULL. May be ignored.
+
+	dir: 'Directory context' in which the document is loaded;
+	associated content from (like images for an html stream
+	will be loaded from this). Maybe NULL. May be ignored.
+
+	recognize_state: NULL, or a state pointer passed back from the call
+	to recognise_content_fn. Ownership does not pass in. The
+	caller remains responsible for freeing state.
+
+	Pointer to opened document. Throws exception in case of error.
+*/
+typedef fz_document *(fz_document_open_fn)(fz_context *ctx, const fz_document_handler *handler, fz_stream *stream, fz_stream *accel, fz_archive *dir, void *recognize_state);
+
+/**
+	Recognize a document type from
+	a magic string.
+
+	handler: the handler in use.
+
+	magic: string to recognise - typically a filename or mime
+	type.
+
+	Returns a number between 0 (not recognized) and 100
+	(fully recognized) based on how certain the recognizer
+	is that this is of the required type.
+*/
+typedef int (fz_document_recognize_fn)(fz_context *ctx, const fz_document_handler *handler, const char *magic);
+
+typedef void (fz_document_recognize_state_free_fn)(fz_context *ctx, void *state);
+
+/**
+	Recognize a document type from stream contents.
+
+	handler: the handler in use.
+
+	stream: stream contents to recognise (may be NULL if document is
+	a directory).
+
+	dir: directory context from which stream is loaded.
+
+	recognize_state: pointer to retrieve opaque state that may be used
+	by the open routine, or NULL.
+
+	free_recognize_state: pointer to retrieve a function pointer to
+	free the opaque state, or NULL.
+
+	Note: state and free_state should either both be NULL or
+	both be non-NULL!
+
+	Returns a number between 0 (not recognized) and 100
+	(fully recognized) based on how certain the recognizer
+	is that this is of the required type.
+*/
+typedef int (fz_document_recognize_content_fn)(fz_context *ctx, const fz_document_handler *handler, fz_stream *stream, fz_archive *dir, void **recognize_state, fz_document_recognize_state_free_fn **free_recognize_state);
+
+/**
+	Finalise a document handler.
+
+	This will be called on shutdown for a document handler to
+	release resources. This should cope with being called with NULL.
+
+	opaque: The value previously returned by the init call.
+*/
+typedef void (fz_document_handler_fin_fn)(fz_context *ctx, const fz_document_handler *handler);
+
+
+
+/**
+	Type for a function to be called when processing an already opened page.
+	See fz_process_opened_pages.
+*/
+typedef void *(fz_process_opened_page_fn)(fz_context *ctx, fz_page *page, void *state);
+
+/**
+	Register a handler for a document type.
+
+	handler: The handler to register. This must live on for the duration of the
+	use of this handler. It will be passed back to the handler for calls so
+	the caller can use it to retrieve state.
+*/
+void fz_register_document_handler(fz_context *ctx, const fz_document_handler *handler);
+
+/**
+	Register handlers for all the standard document types supported in
+	this build.
+*/
+void fz_register_document_handlers(fz_context *ctx);
+
+/**
+	Given a magic find a document handler that can handle a
+	document of this type.
+
+	magic: Can be a filename extension (including initial period) or
+	a mimetype.
+*/
+const fz_document_handler *fz_recognize_document(fz_context *ctx, const char *magic);
+
+/**
+	Given a filename find a document handler that can handle a
+	document of this type.
+
+	filename: The filename of the document. This will be opened and sampled
+	to check data.
+*/
+const fz_document_handler *fz_recognize_document_content(fz_context *ctx, const char *filename);
+
+/**
+	Given a magic find a document handler that can handle a
+	document of this type.
+
+	stream: the file stream to sample. May be NULL if the document is
+	a directory.
+
+	magic: Can be a filename extension (including initial period) or
+	a mimetype.
+*/
+const fz_document_handler *fz_recognize_document_stream_content(fz_context *ctx, fz_stream *stream, const char *magic);
+
+/**
+	Given a magic find a document handler that can handle a
+	document of this type.
+
+	stream: the file stream to sample. May be NULL if the document is
+	a directory.
+
+	dir: an fz_archive representing the directory from which the
+	stream was opened (or NULL).
+
+	magic: Can be a filename extension (including initial period) or
+	a mimetype.
+*/
+const fz_document_handler *fz_recognize_document_stream_and_dir_content(fz_context *ctx, fz_stream *stream, fz_archive *dir, const char *magic);
+
+/**
+	Open a document file and read its basic structure so pages and
+	objects can be located. MuPDF will try to repair broken
+	documents (without actually changing the file contents).
+
+	The returned fz_document is used when calling most other
+	document related functions.
+
+	filename: a path to a file as it would be given to open(2).
+*/
+fz_document *fz_open_document(fz_context *ctx, const char *filename);
+
+/**
+	Open a document file and read its basic structure so pages and
+	objects can be located. MuPDF will try to repair broken
+	documents (without actually changing the file contents).
+
+	The returned fz_document is used when calling most other
+	document related functions.
+
+	filename: a path to a file as it would be given to open(2).
+*/
+fz_document *fz_open_accelerated_document(fz_context *ctx, const char *filename, const char *accel);
+
+/**
+	Open a document using the specified stream object rather than
+	opening a file on disk.
+
+	magic: a string used to detect document type; either a file name
+	or mime-type.
+
+	stream: a stream representing the contents of the document file.
+
+	NOTE: The caller retains ownership of 'stream' - the document will take its
+	own reference if required.
+*/
+fz_document *fz_open_document_with_stream(fz_context *ctx, const char *magic, fz_stream *stream);
+
+/**
+	Open a document using the specified stream object rather than
+	opening a file on disk.
+
+	magic: a string used to detect document type; either a file name
+	or mime-type.
+
+	stream: a stream representing the contents of the document file.
+
+	dir: a 'directory context' for those filetypes that need it.
+
+	NOTE: The caller retains ownership of 'stream' and 'dir' - the document will
+	take its own references if required.
+*/
+fz_document *fz_open_document_with_stream_and_dir(fz_context *ctx, const char *magic, fz_stream *stream, fz_archive *dir);
+
+/**
+	Open a document using a buffer rather than opening a file on disk.
+*/
+fz_document *fz_open_document_with_buffer(fz_context *ctx, const char *magic, fz_buffer *buffer);
+
+/**
+	Open a document using the specified stream object rather than
+	opening a file on disk.
+
+	magic: a string used to detect document type; either a file name
+	or mime-type.
+
+	stream: a stream of the document contents.
+
+	accel: NULL, or a stream of the 'accelerator' contents for this document.
+
+	NOTE: The caller retains ownership of 'stream' and 'accel' - the document will
+	take its own references if required.
+*/
+fz_document *fz_open_accelerated_document_with_stream(fz_context *ctx, const char *magic, fz_stream *stream, fz_stream *accel);
+
+/**
+	Open a document using the specified stream object rather than
+	opening a file on disk.
+
+	magic: a string used to detect document type; either a file name
+	or mime-type.
+
+	stream: a stream of the document contents.
+
+	accel: NULL, or a stream of the 'accelerator' contents for this document.
+
+	dir: NULL, or the 'directory context' for the stream contents.
+
+	NOTE: The caller retains ownership of 'stream', 'accel' and 'dir' - the document will
+	take its own references if required.
+*/
+fz_document *fz_open_accelerated_document_with_stream_and_dir(fz_context *ctx, const char *magic, fz_stream *stream, fz_stream *accel, fz_archive *dir);
+
+/**
+	Query if the document supports the saving of accelerator data.
+*/
+int fz_document_supports_accelerator(fz_context *ctx, fz_document *doc);
+
+/**
+	Save accelerator data for the document to a given file.
+*/
+void fz_save_accelerator(fz_context *ctx, fz_document *doc, const char *accel);
+
+/**
+	Output accelerator data for the document to a given output
+	stream.
+*/
+void fz_output_accelerator(fz_context *ctx, fz_document *doc, fz_output *accel);
+
+/**
+	New documents are typically created by calls like
+	foo_new_document(fz_context *ctx, ...). These work by
+	deriving a new document type from fz_document, for instance:
+	typedef struct { fz_document base; ...extras... } foo_document;
+	These are allocated by calling
+	fz_new_derived_document(ctx, foo_document)
+*/
+void *fz_new_document_of_size(fz_context *ctx, int size);
+#define fz_new_derived_document(C,M) ((M*)Memento_label(fz_new_document_of_size(C, sizeof(M)), #M))
+
+/**
+	Increment the document reference count. The same pointer is
+	returned.
+
+	Never throws exceptions.
+*/
+fz_document *fz_keep_document(fz_context *ctx, fz_document *doc);
+
+/**
+	Decrement the document reference count. When the reference
+	count reaches 0, the document and all it's references are
+	freed.
+
+	Never throws exceptions.
+*/
+void fz_drop_document(fz_context *ctx, fz_document *doc);
+
+/**
+	Check if a document is encrypted with a
+	non-blank password.
+*/
+int fz_needs_password(fz_context *ctx, fz_document *doc);
+
+/**
+	Test if the given password can decrypt the document.
+
+	password: The password string to be checked. Some document
+	specifications do not specify any particular text encoding, so
+	neither do we.
+
+	Returns 0 for failure to authenticate, non-zero for success.
+
+	For PDF documents, further information can be given by examining
+	the bits in the return code.
+
+		Bit 0 => No password required
+		Bit 1 => User password authenticated
+		Bit 2 => Owner password authenticated
+*/
+int fz_authenticate_password(fz_context *ctx, fz_document *doc, const char *password);
+
+/**
+	Load the hierarchical document outline.
+
+	Should be freed by fz_drop_outline.
+*/
+fz_outline *fz_load_outline(fz_context *ctx, fz_document *doc);
+
+/**
+	Get an iterator for the document outline.
+
+	Should be freed by fz_drop_outline_iterator.
+*/
+fz_outline_iterator *fz_new_outline_iterator(fz_context *ctx, fz_document *doc);
+
+/**
+	Is the document reflowable.
+
+	Returns 1 to indicate reflowable documents, otherwise 0.
+*/
+int fz_is_document_reflowable(fz_context *ctx, fz_document *doc);
+
+/**
+	Layout reflowable document types.
+
+	w, h: Page size in points.
+	em: Default font size in points.
+*/
+void fz_layout_document(fz_context *ctx, fz_document *doc, float w, float h, float em);
+
+/**
+	Create a bookmark for the given page, which can be used to find
+	the same location after the document has been laid out with
+	different parameters.
+*/
+fz_bookmark fz_make_bookmark(fz_context *ctx, fz_document *doc, fz_location loc);
+
+/**
+	Find a bookmark and return its page number.
+*/
+fz_location fz_lookup_bookmark(fz_context *ctx, fz_document *doc, fz_bookmark mark);
+
+/**
+	Return the number of pages in document
+
+	May return 0 for documents with no pages.
+*/
+int fz_count_pages(fz_context *ctx, fz_document *doc);
+
+/**
+	Resolve an internal link to a page number, location, and possible viewing parameters.
+
+	Returns location (-1,-1) if the URI cannot be resolved.
+*/
+fz_link_dest fz_resolve_link_dest(fz_context *ctx, fz_document *doc, const char *uri);
+
+/**
+	Format an internal link to a page number, location, and possible viewing parameters,
+	suitable for use with fz_create_link.
+
+	Returns a newly allocated string that the caller must free.
+*/
+char *fz_format_link_uri(fz_context *ctx, fz_document *doc, fz_link_dest dest);
+
+/**
+	Resolve an internal link to a page number.
+
+	xp, yp: Pointer to store coordinate of destination on the page.
+
+	Returns (-1,-1) if the URI cannot be resolved.
+*/
+fz_location fz_resolve_link(fz_context *ctx, fz_document *doc, const char *uri, float *xp, float *yp);
+
+/**
+	Run the document structure through a device.
+
+	doc: Document in question.
+
+	dev: Device obtained from fz_new_*_device.
+
+	cookie: Communication mechanism between caller and library.
+	Intended for multi-threaded applications, while
+	single-threaded applications set cookie to NULL. The
+	caller may abort an ongoing rendering of a page. Cookie also
+	communicates progress information back to the caller. The
+	fields inside cookie are continually updated while the page is
+	rendering.
+*/
+void fz_run_document_structure(fz_context *ctx, fz_document *doc, fz_device *dev, fz_cookie *cookie);
+
+/**
+	Function to get the location for the last page in the document.
+	Using this can be far more efficient in some cases than calling
+	fz_count_pages and using the page number.
+*/
+fz_location fz_last_page(fz_context *ctx, fz_document *doc);
+
+/**
+	Function to get the location of the next page (allowing for the
+	end of chapters etc). If at the end of the document, returns the
+	current location.
+*/
+fz_location fz_next_page(fz_context *ctx, fz_document *doc, fz_location loc);
+
+/**
+	Function to get the location of the previous page (allowing for
+	the end of chapters etc). If already at the start of the
+	document, returns the current page.
+*/
+fz_location fz_previous_page(fz_context *ctx, fz_document *doc, fz_location loc);
+
+/**
+	Clamps a location into valid chapter/page range. (First clamps
+	the chapter into range, then the page into range).
+*/
+fz_location fz_clamp_location(fz_context *ctx, fz_document *doc, fz_location loc);
+
+/**
+	Converts from page number to chapter+page. This may cause many
+	chapters to be laid out in order to calculate the number of
+	pages within those chapters.
+*/
+fz_location fz_location_from_page_number(fz_context *ctx, fz_document *doc, int number);
+
+/**
+	Converts from chapter+page to page number. This may cause many
+	chapters to be laid out in order to calculate the number of
+	pages within those chapters.
+*/
+int fz_page_number_from_location(fz_context *ctx, fz_document *doc, fz_location loc);
+
+/**
+	Load a given page number from a document. This may be much less
+	efficient than loading by location (chapter+page) for some
+	document types.
+*/
+fz_page *fz_load_page(fz_context *ctx, fz_document *doc, int number);
+
+/**
+	Return the number of chapters in the document.
+	At least 1.
+*/
+int fz_count_chapters(fz_context *ctx, fz_document *doc);
+
+/**
+	Return the number of pages in a chapter.
+	May return 0.
+*/
+int fz_count_chapter_pages(fz_context *ctx, fz_document *doc, int chapter);
+
+/**
+	Load a page.
+
+	After fz_load_page is it possible to retrieve the size of the
+	page using fz_bound_page, or to render the page using
+	fz_run_page_*. Free the page by calling fz_drop_page.
+
+	chapter: chapter number, 0 is the first chapter of the document.
+	number: page number, 0 is the first page of the chapter.
+*/
+fz_page *fz_load_chapter_page(fz_context *ctx, fz_document *doc, int chapter, int page);
+
+/**
+	Load the list of links for a page.
+
+	Returns a linked list of all the links on the page, each with
+	its clickable region and link destination. Each link is
+	reference counted so drop and free the list of links by
+	calling fz_drop_link on the pointer return from fz_load_links.
+
+	page: Page obtained from fz_load_page.
+*/
+fz_link *fz_load_links(fz_context *ctx, fz_page *page);
+
+/**
+	Different document types will be implemented by deriving from
+	fz_page. This macro allocates such derived structures, and
+	initialises the base sections.
+*/
+fz_page *fz_new_page_of_size(fz_context *ctx, int size, fz_document *doc);
+#define fz_new_derived_page(CTX,TYPE,DOC) \
+	((TYPE *)Memento_label(fz_new_page_of_size(CTX,sizeof(TYPE),DOC),#TYPE))
+
+/**
+	Determine the size of a page at 72 dpi.
+*/
+fz_rect fz_bound_page(fz_context *ctx, fz_page *page);
+fz_rect fz_bound_page_box(fz_context *ctx, fz_page *page, fz_box_type box);
+
+/**
+	Run a page through a device.
+
+	page: Page obtained from fz_load_page.
+
+	dev: Device obtained from fz_new_*_device.
+
+	transform: Transform to apply to page. May include for example
+	scaling and rotation, see fz_scale, fz_rotate and fz_concat.
+	Set to fz_identity if no transformation is desired.
+
+	cookie: Communication mechanism between caller and library
+	rendering the page. Intended for multi-threaded applications,
+	while single-threaded applications set cookie to NULL. The
+	caller may abort an ongoing rendering of a page. Cookie also
+	communicates progress information back to the caller. The
+	fields inside cookie are continually updated while the page is
+	rendering.
+*/
+void fz_run_page(fz_context *ctx, fz_page *page, fz_device *dev, fz_matrix transform, fz_cookie *cookie);
+
+/**
+	Run a page through a device. Just the main
+	page content, without the annotations, if any.
+
+	page: Page obtained from fz_load_page.
+
+	dev: Device obtained from fz_new_*_device.
+
+	transform: Transform to apply to page. May include for example
+	scaling and rotation, see fz_scale, fz_rotate and fz_concat.
+	Set to fz_identity if no transformation is desired.
+
+	cookie: Communication mechanism between caller and library
+	rendering the page. Intended for multi-threaded applications,
+	while single-threaded applications set cookie to NULL. The
+	caller may abort an ongoing rendering of a page. Cookie also
+	communicates progress information back to the caller. The
+	fields inside cookie are continually updated while the page is
+	rendering.
+*/
+void fz_run_page_contents(fz_context *ctx, fz_page *page, fz_device *dev, fz_matrix transform, fz_cookie *cookie);
+
+/**
+	Run the annotations on a page through a device.
+*/
+void fz_run_page_annots(fz_context *ctx, fz_page *page, fz_device *dev, fz_matrix transform, fz_cookie *cookie);
+
+/**
+	Run the widgets on a page through a device.
+*/
+void fz_run_page_widgets(fz_context *ctx, fz_page *page, fz_device *dev, fz_matrix transform, fz_cookie *cookie);
+
+/**
+	Increment the reference count for the page. Returns the same
+	pointer.
+
+	Never throws exceptions.
+*/
+fz_page *fz_keep_page(fz_context *ctx, fz_page *page);
+
+/**
+	Decrements the reference count for the page. When the reference
+	count hits 0, the page and its references are freed.
+
+	Never throws exceptions.
+*/
+void fz_drop_page(fz_context *ctx, fz_page *page);
+
+/**
+	Get the presentation details for a given page.
+
+	transition: A pointer to a transition struct to fill out.
+
+	duration: A pointer to a place to set the page duration in
+	seconds. Will be set to 0 if no transition is specified for the
+	page.
+
+	Returns: a pointer to the transition structure, or NULL if there
+	is no transition specified for the page.
+*/
+fz_transition *fz_page_presentation(fz_context *ctx, fz_page *page, fz_transition *transition, float *duration);
+
+/**
+	Get page label for a given page.
+*/
+const char *fz_page_label(fz_context *ctx, fz_page *page, char *buf, int size);
+
+/**
+	Check permission flags on document.
+*/
+int fz_has_permission(fz_context *ctx, fz_document *doc, fz_permission p);
+
+/**
+	Retrieve document meta data strings.
+
+	doc: The document to query.
+
+	key: Which meta data key to retrieve...
+
+	Basic information:
+		'format'	-- Document format and version.
+		'encryption'	-- Description of the encryption used.
+
+	From the document information dictionary:
+		'info:Title'
+		'info:Author'
+		'info:Subject'
+		'info:Keywords'
+		'info:Creator'
+		'info:Producer'
+		'info:CreationDate'
+		'info:ModDate'
+
+	buf: The buffer to hold the results (a nul-terminated UTF-8
+	string).
+
+	size: Size of 'buf'.
+
+	Returns the number of bytes need to store the string plus terminator
+	(will be larger than 'size' if the output was truncated), or -1 if the
+	key is not recognized or found.
+*/
+int fz_lookup_metadata(fz_context *ctx, fz_document *doc, const char *key, char *buf, size_t size);
+
+#define FZ_META_FORMAT "format"
+#define FZ_META_ENCRYPTION "encryption"
+
+#define FZ_META_INFO "info:"
+#define FZ_META_INFO_TITLE "info:Title"
+#define FZ_META_INFO_AUTHOR "info:Author"
+#define FZ_META_INFO_SUBJECT "info:Subject"
+#define FZ_META_INFO_KEYWORDS "info:Keywords"
+#define FZ_META_INFO_CREATOR "info:Creator"
+#define FZ_META_INFO_PRODUCER "info:Producer"
+#define FZ_META_INFO_CREATIONDATE "info:CreationDate"
+#define FZ_META_INFO_MODIFICATIONDATE "info:ModDate"
+
+void fz_set_metadata(fz_context *ctx, fz_document *doc, const char *key, const char *value);
+
+/**
+	Find the output intent colorspace if the document has defined
+	one.
+
+	Returns a borrowed reference that should not be dropped, unless
+	it is kept first.
+*/
+fz_colorspace *fz_document_output_intent(fz_context *ctx, fz_document *doc);
+
+/**
+	Get the separations details for a page.
+	This will be NULL, unless the format specifically supports
+	separations (such as PDF files). May be NULL even
+	so, if there are no separations on a page.
+
+	Returns a reference that must be dropped.
+*/
+fz_separations *fz_page_separations(fz_context *ctx, fz_page *page);
+
+/**
+	Query if a given page requires overprint.
+*/
+int fz_page_uses_overprint(fz_context *ctx, fz_page *page);
+
+/**
+	Create a new link on a page.
+*/
+fz_link *fz_create_link(fz_context *ctx, fz_page *page, fz_rect bbox, const char *uri);
+
+/**
+	Delete an existing link on a page.
+*/
+void fz_delete_link(fz_context *ctx, fz_page *page, fz_link *link);
+
+/**
+	Iterates over all opened pages of the document, calling the
+	provided callback for each page for processing. If the callback
+	returns non-NULL then the iteration stops and that value is returned
+	to the called of fz_process_opened_pages().
+
+	The state pointer provided to fz_process_opened_pages() is
+	passed on to the callback but is owned by the caller.
+
+	Returns the first non-NULL value returned by the callback,
+	or NULL if the callback returned NULL for all opened pages.
+*/
+void *fz_process_opened_pages(fz_context *ctx, fz_document *doc, fz_process_opened_page_fn *process_openend_page, void *state);
+
+/* Implementation details: subject to change. */
+
+/**
+	Structure definition is public so other classes can
+	derive from it. Do not access the members directly.
+*/
+struct fz_page
+{
+	int refs;
+	fz_document *doc; /* kept reference to parent document. Guaranteed non-NULL. */
+	int chapter; /* chapter number */
+	int number; /* page number in chapter */
+	int incomplete; /* incomplete from progressive loading; don't cache! */
+	int in_doc; /* page has been placed into the document */
+	fz_page_drop_page_fn *drop_page;
+	fz_page_bound_page_fn *bound_page;
+	fz_page_run_page_fn *run_page_contents;
+	fz_page_run_page_fn *run_page_annots;
+	fz_page_run_page_fn *run_page_widgets;
+	fz_page_load_links_fn *load_links;
+	fz_page_page_presentation_fn *page_presentation;
+	fz_page_control_separation_fn *control_separation;
+	fz_page_separation_disabled_fn *separation_disabled;
+	fz_page_separations_fn *separations;
+	fz_page_uses_overprint_fn *overprint;
+	fz_page_create_link_fn *create_link;
+	fz_page_delete_link_fn *delete_link;
+
+	/* linked list of currently open pages. This list is maintained
+	 * by fz_load_chapter_page and fz_drop_page. All pages hold a
+	 * kept reference to the document, so the document cannot disappear
+	 * while pages exist. 'Incomplete' pages are NOT kept in this
+	 * list. */
+	fz_page **prev, *next;
+};
+
+/**
+	Structure definition is public so other classes can
+	derive from it. Callers should not access the members
+	directly, though implementations will need initialize
+	functions directly.
+*/
+struct fz_document
+{
+	int refs;
+	fz_document_drop_fn *drop_document;
+	fz_document_needs_password_fn *needs_password;
+	fz_document_authenticate_password_fn *authenticate_password;
+	fz_document_has_permission_fn *has_permission;
+	fz_document_load_outline_fn *load_outline;
+	fz_document_outline_iterator_fn *outline_iterator;
+	fz_document_layout_fn *layout;
+	fz_document_make_bookmark_fn *make_bookmark;
+	fz_document_lookup_bookmark_fn *lookup_bookmark;
+	fz_document_resolve_link_dest_fn *resolve_link_dest;
+	fz_document_format_link_uri_fn *format_link_uri;
+	fz_document_count_chapters_fn *count_chapters;
+	fz_document_count_pages_fn *count_pages;
+	fz_document_load_page_fn *load_page;
+	fz_document_page_label_fn *page_label;
+	fz_document_lookup_metadata_fn *lookup_metadata;
+	fz_document_set_metadata_fn *set_metadata;
+	fz_document_output_intent_fn *get_output_intent;
+	fz_document_output_accelerator_fn *output_accelerator;
+	fz_document_run_structure_fn *run_structure;
+	fz_document_as_pdf_fn *as_pdf;
+	int did_layout;
+	int is_reflowable;
+	int id;
+
+	/* Linked list of currently open pages. These are not
+	 * references, but just a linked list of open pages,
+	 * maintained by fz_load_chapter_page, and fz_drop_page.
+	 * Every page holds a kept reference to the document, so
+	 * the document cannot be destroyed while a page exists.
+	 * Incomplete pages are NOT inserted into this list, but
+	 * do still hold a real document reference. */
+	fz_page *open;
+};
+
+struct fz_document_handler
+{
+	/* These fields are initialised by the handler when it is registered. */
+	fz_document_recognize_fn *recognize;
+	fz_document_open_fn *open;
+	const char **extensions;
+	const char **mimetypes;
+	fz_document_recognize_content_fn *recognize_content;
+	int wants_dir;
+	int wants_file;
+	fz_document_handler_fin_fn *fin;
+};
+
+#endif