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+/* -*- Mode: c; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 8; -*- */
+/* cairo - a vector graphics library with display and print output
+ *
+ * Copyright © 2002 University of Southern California
+ * Copyright © 2005 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
+ * http://www.mozilla.org/MPL/
+ *
+ * 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 University of Southern
+ * California.
+ *
+ * Contributor(s):
+ * Carl D. Worth <cworth@cworth.org>
+ */
+
+#define CAIRO_VERSION_H 1
+
+#include "cairoint.h"
+
+/* get the "real" version info instead of dummy cairo-version.h */
+#undef CAIRO_VERSION_H
+#include "../cairo-version.h"
+
+/**
+ * SECTION:cairo-version
+ * @Title: Version Information
+ * @Short_Description: Compile-time and run-time version checks.
+ *
+ * Cairo has a three-part version number scheme. In this scheme, we use
+ * even vs. odd numbers to distinguish fixed points in the software
+ * vs. in-progress development, (such as from git instead of a tar file,
+ * or as a "snapshot" tar file as opposed to a "release" tar file).
+ *
+ * <informalexample><screen>
+ * _____ Major. Always 1, until we invent a new scheme.
+ * / ___ Minor. Even/Odd = Release/Snapshot (tar files) or Branch/Head (git)
+ * | / _ Micro. Even/Odd = Tar-file/git
+ * | | /
+ * 1.0.0
+ * </screen></informalexample>
+ *
+ * Here are a few examples of versions that one might see.
+ * <informalexample><screen>
+ * Releases
+ * --------
+ * 1.0.0 - A major release
+ * 1.0.2 - A subsequent maintenance release
+ * 1.2.0 - Another major release
+ * &nbsp;
+ * Snapshots
+ * ---------
+ * 1.1.2 - A snapshot (working toward the 1.2.0 release)
+ * &nbsp;
+ * In-progress development (eg. from git)
+ * --------------------------------------
+ * 1.0.1 - Development on a maintenance branch (toward 1.0.2 release)
+ * 1.1.1 - Development on head (toward 1.1.2 snapshot and 1.2.0 release)
+ * </screen></informalexample>
+ *
+ * <refsect2>
+ * <title>Compatibility</title>
+ *
+ * The API/ABI compatibility guarantees for various versions are as
+ * follows. First, let's assume some cairo-using application code that is
+ * successfully using the API/ABI "from" one version of cairo. Then let's
+ * ask the question whether this same code can be moved "to" the API/ABI
+ * of another version of cairo.
+ *
+ * Moving from a release to any later version (release, snapshot,
+ * development) is always guaranteed to provide compatibility.
+ *
+ * Moving from a snapshot to any later version is not guaranteed to
+ * provide compatibility, since snapshots may introduce new API that ends
+ * up being removed before the next release.
+ *
+ * Moving from an in-development version (odd micro component) to any
+ * later version is not guaranteed to provide compatibility. In fact,
+ * there's not even a guarantee that the code will even continue to work
+ * with the same in-development version number. This is because these
+ * numbers don't correspond to any fixed state of the software, but
+ * rather the many states between snapshots and releases.
+ *
+ * </refsect2>
+ * <refsect2>
+ * <title>Examining the version</title>
+ *
+ * Cairo provides the ability to examine the version at either
+ * compile-time or run-time and in both a human-readable form as well as
+ * an encoded form suitable for direct comparison. Cairo also provides the
+ * macro CAIRO_VERSION_ENCODE() to perform the encoding.
+ *
+ * <informalexample><screen>
+ * Compile-time
+ * ------------
+ * #CAIRO_VERSION_STRING Human-readable
+ * #CAIRO_VERSION Encoded, suitable for comparison
+ * &nbsp;
+ * Run-time
+ * --------
+ * cairo_version_string() Human-readable
+ * cairo_version() Encoded, suitable for comparison
+ * </screen></informalexample>
+ *
+ * For example, checking that the cairo version is greater than or equal
+ * to 1.0.0 could be achieved at compile-time or run-time as follows:
+ *
+ * <informalexample><programlisting>
+ * ##if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 0, 0)
+ * printf ("Compiling with suitable cairo version: %s\n", %CAIRO_VERSION_STRING);
+ * ##endif
+ *
+ * if (cairo_version() >= CAIRO_VERSION_ENCODE(1, 0, 0))
+ * printf ("Running with suitable cairo version: %s\n", cairo_version_string ());
+ * </programlisting></informalexample>
+ *
+ * </refsect2>
+ *
+ **/
+
+/**
+ * CAIRO_VERSION:
+ *
+ * The version of cairo available at compile-time, encoded using
+ * CAIRO_VERSION_ENCODE().
+ *
+ * Since: 1.0
+ **/
+
+/**
+ * CAIRO_VERSION_MAJOR:
+ *
+ * The major component of the version of cairo available at compile-time.
+ *
+ * Since: 1.0
+ **/
+
+/**
+ * CAIRO_VERSION_MINOR:
+ *
+ * The minor component of the version of cairo available at compile-time.
+ *
+ * Since: 1.0
+ **/
+
+/**
+ * CAIRO_VERSION_MICRO:
+ *
+ * The micro component of the version of cairo available at compile-time.
+ *
+ * Since: 1.0
+ **/
+
+/**
+ * CAIRO_VERSION_STRING:
+ *
+ * A human-readable string literal containing the version of cairo available
+ * at compile-time, in the form of "X.Y.Z".
+ *
+ * Since: 1.8
+ **/
+
+/**
+ * CAIRO_VERSION_ENCODE:
+ * @major: the major component of the version number
+ * @minor: the minor component of the version number
+ * @micro: the micro component of the version number
+ *
+ * This macro encodes the given cairo version into an integer. The numbers
+ * returned by %CAIRO_VERSION and cairo_version() are encoded using this macro.
+ * Two encoded version numbers can be compared as integers. The encoding ensures
+ * that later versions compare greater than earlier versions.
+ *
+ * Returns: the encoded version.
+ *
+ * Since: 1.0
+ **/
+
+/**
+ * CAIRO_VERSION_STRINGIZE:
+ * @major: the major component of the version number
+ * @minor: the minor component of the version number
+ * @micro: the micro component of the version number
+ *
+ * This macro encodes the given cairo version into an string. The numbers
+ * returned by %CAIRO_VERSION_STRING and cairo_version_string() are encoded using this macro.
+ * The parameters to this macro must expand to numerical literals.
+ *
+ * Returns: a string literal containing the version.
+ *
+ * Since: 1.8
+ **/
+
+/**
+ * cairo_version:
+ *
+ * Returns the version of the cairo library encoded in a single
+ * integer as per %CAIRO_VERSION_ENCODE. The encoding ensures that
+ * later versions compare greater than earlier versions.
+ *
+ * A run-time comparison to check that cairo's version is greater than
+ * or equal to version X.Y.Z could be performed as follows:
+ *
+ * <informalexample><programlisting>
+ * if (cairo_version() >= CAIRO_VERSION_ENCODE(X,Y,Z)) {...}
+ * </programlisting></informalexample>
+ *
+ * See also cairo_version_string() as well as the compile-time
+ * equivalents %CAIRO_VERSION and %CAIRO_VERSION_STRING.
+ *
+ * Return value: the encoded version.
+ *
+ * Since: 1.0
+ **/
+int
+cairo_version (void)
+{
+ return CAIRO_VERSION;
+}
+
+/**
+ * cairo_version_string:
+ *
+ * Returns the version of the cairo library as a human-readable string
+ * of the form "X.Y.Z".
+ *
+ * See also cairo_version() as well as the compile-time equivalents
+ * %CAIRO_VERSION_STRING and %CAIRO_VERSION.
+ *
+ * Return value: a string containing the version.
+ *
+ * Since: 1.0
+ **/
+const char*
+cairo_version_string (void)
+{
+ return CAIRO_VERSION_STRING;
+}
+slim_hidden_def (cairo_version_string);