Added Wayland graphics support

Author: phlash

CMakeLists.txt

@@ -864,6 +864,11 @@ IF(NOT (ANDROID AND OSG_FIND_3RD_PARTY_DEPS))
     ENDIF()
 ENDIF()
 
+IF(OSG_WINDOWING_SYSTEM STREQUAL "X11")
+  # optional Wayland graphics also supported..
+  FIND_PACKAGE(Wayland)
+ENDIF()
+
 ################################################################################
 # Create bin and lib directories if required
 

CMakeModules/FindWayland.cmake

@@ -0,0 +1,15 @@
+# Find Wayland development libraries & headers for wayland-egl & wayland-cursor & EGL
+#
+# WAYLAND_FOUND - system has a libwayland-[egl|client|cursor] + libEGL
+# WAYLAND_INCLUDE_DIR - where to find header files
+# WAYLAND_LIBRARIES - the libraries to link against Wayland
+#
+# copyright (c) 2022 Phil Ashby <[email protected]>
+# Redistribution and use of this file is allowed according to the terms of the BSD license.
+#
+
+# Use PkgConfig to find includes and libs
+find_package(PkgConfig QUIET)
+if (PKG_CONFIG_FOUND)
+	PKG_CHECK_MODULES(WAYLAND QUIET wayland-egl wayland-cursor egl)
+endif ()

src/osgViewer/CMakeLists.txt

@@ -248,6 +248,16 @@ ELSE()
 
           SET(LIB_EXTRA_LIBS ${X11_X11_LIB} ${LIB_EXTRA_LIBS})
         ENDIF(APPLE)
+
+        # Add Wayland here if available..
+        IF(WAYLAND_FOUND)
+          ADD_DEFINITIONS(-DOSGVIEWER_USE_WAYLAND)
+          SET(LIB_COMMON_FILES ${LIB_COMMON_FILES}
+            GraphicsWindowWayland.cpp
+            xdg-shell.c
+            xdg-decoration-unstable-v1.c)
+          SET(LIB_EXTRA_LIBS ${WAYLAND_LIBRARIES} ${LIB_EXTRA_LIBS})
+        ENDIF()
     ELSE()
         MESSAGE(STATUS "Windowing system not supported")
     ENDIF()

src/osgViewer/GraphicsWindowWayland.cpp

@@ -0,0 +1,14 @@
+#pragma once
+#include <wayland-client.h>
+
+// declare our function for accessing a data_device from the Wayland connection
+#ifdef __cplusplus
+extern "C" {
+#endif
+    struct wl_data_device* getWaylandDataDevice();
+    struct wl_data_source* getWaylandDataSource();
+    uint32_t getWaylandLastKeySerial();
+    struct wl_display* getWaylandDisplay();
+#ifdef __cplusplus
+}
+#endif

src/osgViewer/GraphicsWindowWayland.h

@@ -0,0 +1,65 @@
+/* Generated by wayland-scanner 1.18.0 */
+
+/*
+ * Copyright © 2018 Simon Ser
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdlib.h>
+#include <stdint.h>
+#include "wayland-util.h"
+
+extern const struct wl_interface xdg_toplevel_interface;
+extern const struct wl_interface zxdg_toplevel_decoration_v1_interface;
+
+static const struct wl_interface *xdg_decoration_unstable_v1_types[] = {
+	NULL,
+	&zxdg_toplevel_decoration_v1_interface,
+	&xdg_toplevel_interface,
+};
+
+static const struct wl_message zxdg_decoration_manager_v1_requests[] = {
+	{ "destroy", "", xdg_decoration_unstable_v1_types + 0 },
+	{ "get_toplevel_decoration", "no", xdg_decoration_unstable_v1_types + 1 },
+};
+
+WL_EXPORT const struct wl_interface zxdg_decoration_manager_v1_interface = {
+	"zxdg_decoration_manager_v1", 1,
+	2, zxdg_decoration_manager_v1_requests,
+	0, NULL,
+};
+
+static const struct wl_message zxdg_toplevel_decoration_v1_requests[] = {
+	{ "destroy", "", xdg_decoration_unstable_v1_types + 0 },
+	{ "set_mode", "u", xdg_decoration_unstable_v1_types + 0 },
+	{ "unset_mode", "", xdg_decoration_unstable_v1_types + 0 },
+};
+
+static const struct wl_message zxdg_toplevel_decoration_v1_events[] = {
+	{ "configure", "u", xdg_decoration_unstable_v1_types + 0 },
+};
+
+WL_EXPORT const struct wl_interface zxdg_toplevel_decoration_v1_interface = {
+	"zxdg_toplevel_decoration_v1", 1,
+	3, zxdg_toplevel_decoration_v1_requests,
+	1, zxdg_toplevel_decoration_v1_events,
+};
+