monitor-transform: Move helper functions into their own file

The existing ones are statically inlined, so there is no .c file
right now.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/366

src/Makefile.am

@@ -160,6 +160,7 @@ libmutter_@LIBMUTTER_API_VERSION@_la_SOURCES =	\
 	backends/meta-monitor-manager-private.h	\
 	backends/meta-monitor-manager-dummy.c	\
 	backends/meta-monitor-manager-dummy.h	\
+	backends/meta-monitor-transform.h	\
 	backends/meta-orientation-manager.c	\
 	backends/meta-orientation-manager.h	\
 	backends/meta-output.c			\

src/backends/meta-backend-types.h

@@ -33,17 +33,7 @@ typedef struct _MetaMonitorTiled MetaMonitorTiled;
 typedef struct _MetaMonitorSpec MetaMonitorSpec;
 typedef struct _MetaLogicalMonitor MetaLogicalMonitor;
 
-typedef enum _MetaMonitorTransform
+typedef enum _MetaMonitorTransform MetaMonitorTransform;
-{
-  META_MONITOR_TRANSFORM_NORMAL,
-  META_MONITOR_TRANSFORM_90,
-  META_MONITOR_TRANSFORM_180,
-  META_MONITOR_TRANSFORM_270,
-  META_MONITOR_TRANSFORM_FLIPPED,
-  META_MONITOR_TRANSFORM_FLIPPED_90,
-  META_MONITOR_TRANSFORM_FLIPPED_180,
-  META_MONITOR_TRANSFORM_FLIPPED_270,
-} MetaMonitorTransform;
 
 typedef struct _MetaMonitorMode MetaMonitorMode;
 

src/backends/meta-crtc.h

@@ -23,6 +23,7 @@
 #include <glib-object.h>
 
 #include "backends/meta-backend-types.h"
+#include "backends/meta-monitor-transform.h"
 #include "meta/boxes.h"
 
 /* Same as KMS mode flags and X11 randr flags */

src/backends/meta-monitor-manager-private.h

@@ -41,6 +41,7 @@
 #include "backends/meta-backend-private.h"
 #include "backends/meta-cursor.h"
 #include "backends/meta-display-config-shared.h"
+#include "backends/meta-monitor-transform.h"
 #include "meta/display.h"
 #include "meta/meta-monitor-manager.h"
 
@@ -335,19 +336,4 @@ void meta_monitor_manager_clear_output (MetaOutput *output);
 void meta_monitor_manager_clear_mode (MetaCrtcMode *mode);
 void meta_monitor_manager_clear_crtc (MetaCrtc *crtc);
 
-/* Returns true if transform causes width and height to be inverted
-   This is true for the odd transforms in the enum */
-static inline gboolean
-meta_monitor_transform_is_rotated (MetaMonitorTransform transform)
-{
-  return (transform % 2);
-}
-
-/* Returns true if transform involves flipping */
-static inline gboolean
-meta_monitor_transform_is_flipped (MetaMonitorTransform transform)
-{
-  return (transform >= META_MONITOR_TRANSFORM_FLIPPED);
-}
-
 #endif /* META_MONITOR_MANAGER_PRIVATE_H */

src/backends/meta-monitor-transform.h

@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2013 Red Hat Inc.
+ * Copyright (C) 2018 Robert Mader
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef META_MONITOR_TRANSFORM_H
+#define META_MONITOR_TRANSFORM_H
+
+#include <glib-object.h>
+
+#include "backends/meta-backend-types.h"
+
+enum _MetaMonitorTransform
+{
+  META_MONITOR_TRANSFORM_NORMAL,
+  META_MONITOR_TRANSFORM_90,
+  META_MONITOR_TRANSFORM_180,
+  META_MONITOR_TRANSFORM_270,
+  META_MONITOR_TRANSFORM_FLIPPED,
+  META_MONITOR_TRANSFORM_FLIPPED_90,
+  META_MONITOR_TRANSFORM_FLIPPED_180,
+  META_MONITOR_TRANSFORM_FLIPPED_270,
+};
+
+/* Returns true if transform causes width and height to be inverted
+   This is true for the odd transforms in the enum */
+static inline gboolean
+meta_monitor_transform_is_rotated (MetaMonitorTransform transform)
+{
+  return (transform % 2);
+}
+
+/* Returns true if transform involves flipping */
+static inline gboolean
+meta_monitor_transform_is_flipped (MetaMonitorTransform transform)
+{
+  return (transform >= META_MONITOR_TRANSFORM_FLIPPED);
+}
+
+#endif /* META_MONITOR_TRANSFORM_H */

src/compositor/region-utils.c

@@ -20,6 +20,7 @@
 
 #include "config.h"
 
+#include "backends/meta-monitor-transform.h"
 #include "compositor/region-utils.h"
 
 #include <math.h>

src/meson.build

@@ -202,6 +202,7 @@ mutter_sources = [
   'backends/meta-monitor-manager-dummy.c',
   'backends/meta-monitor-manager-dummy.h',
   'backends/meta-monitor-manager-private.h',
+  'backends/meta-monitor-transform.h',
   'backends/meta-orientation-manager.c',
   'backends/meta-orientation-manager.h',
   'backends/meta-output.c',