output: split into multiple files

This organizes the wlr_output implementation into separate files.
This avoids having a single mega-file with lots of unrelated parts
and makes it more obvious what the interactions between all the
parts are.

No functional changes, just moving code around.

include/types/wlr_output.h

@@ -0,0 +1,15 @@
+#ifndef TYPES_WLR_OUTPUT_H
+#define TYPES_WLR_OUTPUT_H
+
+#include <wlr/render/drm_format_set.h>
+#include <wlr/types/wlr_output.h>
+
+void output_pending_resolution(struct wlr_output *output, int *width,
+	int *height);
+
+struct wlr_drm_format *output_pick_format(struct wlr_output *output,
+	const struct wlr_drm_format_set *display_formats);
+void output_clear_back_buffer(struct wlr_output *output);
+bool output_ensure_buffer(struct wlr_output *output);
+
+#endif

types/meson.build

@@ -3,6 +3,10 @@ wlr_files += files(
 	'data_device/wlr_data_offer.c',
 	'data_device/wlr_data_source.c',
 	'data_device/wlr_drag.c',
+	'output/cursor.c',
+	'output/output.c',
+	'output/render.c',
+	'output/transform.c',
 	'scene/subsurface_tree.c',
 	'scene/wlr_scene.c',
 	'scene/output_layout.c',
@@ -43,7 +47,6 @@ wlr_files += files(
 	'wlr_output_layout.c',
 	'wlr_output_management_v1.c',
 	'wlr_output_power_management_v1.c',
-	'wlr_output.c',
 	'wlr_pointer_constraints_v1.c',
 	'wlr_pointer_gestures_v1.c',
 	'wlr_pointer.c',