Source code
Revision control
Copy as Markdown
Other Tools
/* cairo - a vector graphics library with display and print output
*
* Copyright © 2006 Red Hat, Inc
*
* This library is free software; you can redistribute it and/or
* modify it either under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation
* (the "LGPL") or, at your option, under the terms of the Mozilla
* Public License Version 1.1 (the "MPL"). If you do not alter this
* notice, a recipient may use your version of this file under either
* the MPL or the LGPL.
*
* You should have received a copy of the LGPL along with this library
* in the file COPYING-LGPL-2.1; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
* You should have received a copy of the MPL along with this library
* in the file COPYING-MPL-1.1
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
* OF ANY KIND, either express or implied. See the LGPL or the MPL for
* the specific language governing rights and limitations.
*
* The Original Code is the cairo graphics library.
*
* The Initial Developer of the Original Code is Red Hat, Inc.
*
* Author(s):
* Kristian Høgsberg <krh@redhat.com>
*/
#ifndef CAIRO_OUTPUT_STREAM_PRIVATE_H
#define CAIRO_OUTPUT_STREAM_PRIVATE_H
#include "cairo-compiler-private.h"
#include "cairo-types-private.h"
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
typedef cairo_status_t
(*cairo_output_stream_write_func_t) (cairo_output_stream_t *output_stream,
const unsigned char *data,
unsigned int length);
typedef cairo_status_t
(*cairo_output_stream_flush_func_t) (cairo_output_stream_t *output_stream);
typedef cairo_status_t
(*cairo_output_stream_close_func_t) (cairo_output_stream_t *output_stream);
struct _cairo_output_stream {
cairo_output_stream_write_func_t write_func;
cairo_output_stream_flush_func_t flush_func;
cairo_output_stream_close_func_t close_func;
unsigned long position;
cairo_status_t status;
cairo_bool_t closed;
};
extern const cairo_private cairo_output_stream_t _cairo_output_stream_nil;
cairo_private void
_cairo_output_stream_init (cairo_output_stream_t *stream,
cairo_output_stream_write_func_t write_func,
cairo_output_stream_flush_func_t flush_func,
cairo_output_stream_close_func_t close_func);
cairo_private cairo_status_t
_cairo_output_stream_fini (cairo_output_stream_t *stream);
/* We already have the following declared in cairo.h:
typedef cairo_status_t (*cairo_write_func_t) (void *closure,
const unsigned char *data,
unsigned int length);
*/
typedef cairo_status_t (*cairo_close_func_t) (void *closure);
/* This function never returns %NULL. If an error occurs (NO_MEMORY)
* while trying to create the output stream this function returns a
* valid pointer to a nil output stream.
*
* Note that even with a nil surface, the close_func callback will be
* called by a call to _cairo_output_stream_close or
* _cairo_output_stream_destroy.
*/
cairo_private cairo_output_stream_t *
_cairo_output_stream_create (cairo_write_func_t write_func,
cairo_close_func_t close_func,
void *closure);
cairo_private cairo_output_stream_t *
_cairo_output_stream_create_in_error (cairo_status_t status);
/* Tries to flush any buffer maintained by the stream or its delegates. */
cairo_private cairo_status_t
_cairo_output_stream_flush (cairo_output_stream_t *stream);
/* Returns the final status value associated with this object, just
* before its last gasp. This final status value will capture any
* status failure returned by the stream's close_func as well. */
cairo_private cairo_status_t
_cairo_output_stream_close (cairo_output_stream_t *stream);
/* Returns the final status value associated with this object, just
* before its last gasp. This final status value will capture any
* status failure returned by the stream's close_func as well. */
cairo_private cairo_status_t
_cairo_output_stream_destroy (cairo_output_stream_t *stream);
cairo_private void
_cairo_output_stream_write (cairo_output_stream_t *stream,
const void *data, size_t length);
cairo_private void
_cairo_output_stream_write_hex_string (cairo_output_stream_t *stream,
const unsigned char *data,
size_t length);
cairo_private void
_cairo_output_stream_vprintf (cairo_output_stream_t *stream,
const char *fmt,
va_list ap) CAIRO_PRINTF_FORMAT ( 2, 0);
cairo_private void
_cairo_output_stream_printf (cairo_output_stream_t *stream,
const char *fmt,
...) CAIRO_PRINTF_FORMAT (2, 3);
/* Print matrix element values with rounding of insignificant digits. */
cairo_private void
_cairo_output_stream_print_matrix (cairo_output_stream_t *stream,
const cairo_matrix_t *matrix);
cairo_private long
_cairo_output_stream_get_position (cairo_output_stream_t *stream);
cairo_private cairo_status_t
_cairo_output_stream_get_status (cairo_output_stream_t *stream);
/* This function never returns %NULL. If an error occurs (NO_MEMORY or
* WRITE_ERROR) while trying to create the output stream this function
* returns a valid pointer to a nil output stream.
*
* Note: Even if a nil surface is returned, the caller should still
* call _cairo_output_stream_destroy (or _cairo_output_stream_close at
* least) in order to ensure that everything is properly cleaned up.
*/
cairo_private cairo_output_stream_t *
_cairo_output_stream_create_for_filename (const char *filename);
/* This function never returns %NULL. If an error occurs (NO_MEMORY or
* WRITE_ERROR) while trying to create the output stream this function
* returns a valid pointer to a nil output stream.
*
* The caller still "owns" file and is responsible for calling fclose
* on it when finished. The stream will not do this itself.
*/
cairo_private cairo_output_stream_t *
_cairo_output_stream_create_for_file (FILE *file);
cairo_private cairo_output_stream_t *
_cairo_memory_stream_create (void);
cairo_private void
_cairo_memory_stream_copy (cairo_output_stream_t *base,
cairo_output_stream_t *dest);
cairo_private int
_cairo_memory_stream_length (cairo_output_stream_t *stream);
cairo_private cairo_status_t
_cairo_memory_stream_destroy (cairo_output_stream_t *abstract_stream,
unsigned char **data_out,
unsigned long *length_out);
cairo_private cairo_output_stream_t *
_cairo_null_stream_create (void);
/* cairo-base85-stream.c */
cairo_private cairo_output_stream_t *
_cairo_base85_stream_create (cairo_output_stream_t *output);
/* cairo-base64-stream.c */
cairo_private cairo_output_stream_t *
_cairo_base64_stream_create (cairo_output_stream_t *output);
/* cairo-deflate-stream.c */
cairo_private cairo_output_stream_t *
_cairo_deflate_stream_create (cairo_output_stream_t *output);
#endif /* CAIRO_OUTPUT_STREAM_PRIVATE_H */