libweston: Migrate functions that operate on 'weston_output' into backend header

Signed-off-by: Marius Vlad <marius.vlad@collabora.com>

libweston/backend.h

@@ -57,5 +57,36 @@ weston_head_set_physical_size(struct weston_head *head,
 void
 weston_head_set_subpixel(struct weston_head *head,
 			 enum wl_output_subpixel sp);
+/* weston_output */
+
+void
+weston_output_init(struct weston_output *output,
+		   struct weston_compositor *compositor,
+		   const char *name);
+void
+weston_output_damage(struct weston_output *output);
+
+void
+weston_output_move(struct weston_output *output, int x, int y);
+
+void
+weston_output_release(struct weston_output *output);
+
+void
+weston_output_init_zoom(struct weston_output *output);
+
+void
+weston_output_finish_frame(struct weston_output *output,
+			   const struct timespec *stamp,
+			   uint32_t presented_flags);
+int
+weston_output_mode_set_native(struct weston_output *output,
+			      struct weston_mode *mode,
+			      int32_t scale);
+void
+weston_output_transform_coordinate(struct weston_output *output,
+				   double device_x, double device_y,
+				   double *x, double *y);
+
 
 #endif

libweston/compositor.c

@@ -72,6 +72,7 @@
 #include <libweston/version.h>
 #include <libweston/plugin-registry.h>
 #include "pixel-formats.h"
+#include "backend.h"
 #include "libweston-internal.h"
 
 /**

libweston/libinput-device.c

@@ -39,6 +39,7 @@
 #include <libinput.h>
 
 #include <libweston/libweston.h>
+#include "backend.h"
 #include "libweston-internal.h"
 #include "libinput-device.h"
 #include "shared/helpers.h"

libweston/screenshooter.c

@@ -38,6 +38,7 @@
 #include <libweston/libweston.h>
 #include "shared/helpers.h"
 #include "shared/timespec-util.h"
+#include "backend.h"
 #include "libweston-internal.h"
 
 #include "wcap/wcap-decode.h"

libweston/zoom.c

@@ -31,6 +31,7 @@
 #include <stdbool.h>
 
 #include <libweston/libweston.h>
+#include "backend.h"
 #include "libweston-internal.h"
 #include "text-cursor-position-server-protocol.h"
 #include "shared/helpers.h"