d/wmr: Add stub WinMR builder

src/xrt/targets/common/CMakeLists.txt

@@ -45,6 +45,11 @@ if(XRT_BUILD_DRIVER_NS)
 	target_link_libraries(target_lists PRIVATE drv_ns)
 endif()
 
+if(XRT_BUILD_DRIVER_WMR)
+	target_sources(target_lists PRIVATE target_builder_wmr.c)
+	target_link_libraries(target_lists PRIVATE drv_wmr)
+endif()
+
 ###
 # Drivers
 #

src/xrt/targets/common/target_builder_interface.h

@@ -1,4 +1,4 @@
-// Copyright 2022, Collabora, Ltd.
+// Copyright 2022-2023, Collabora, Ltd.
 // SPDX-License-Identifier: BSL-1.0
 /*!
  * @file
@@ -43,6 +43,10 @@
 #define T_BUILDER_SIMULAVR
 #endif
 
+#if defined(XRT_BUILD_DRIVER_WMR) || defined(XRT_DOXYGEN)
+#define T_BUILDER_WMR
+#endif
+
 
 /*
  *
@@ -106,3 +110,11 @@ t_builder_simulated_create(void);
 struct xrt_builder *
 t_builder_simula_create(void);
 #endif
+
+#ifdef T_BUILDER_WMR
+/*!
+ * Builder for Windows Mixed Reality headsets
+ */
+struct xrt_builder *
+t_builder_wmr_create(void);
+#endif

src/xrt/targets/common/target_builder_wmr.c

@@ -0,0 +1,92 @@
+// Copyright 2022-2023, Collabora, Ltd.
+// SPDX-License-Identifier: BSL-1.0
+/*!
+ * @file
+ * @brief  @ref drv_wmr driver builder.
+ * @author Jakob Bornecrantz <jakob@collabora.com>
+ * @ingroup xrt_iface
+ */
+
+#include "xrt/xrt_config_drivers.h"
+#include "xrt/xrt_prober.h"
+
+#include "util/u_misc.h"
+#include "util/u_logging.h"
+#include "util/u_builders.h"
+#include "util/u_config_json.h"
+#include "util/u_system_helpers.h"
+
+#include "target_builder_interface.h"
+
+#include "wmr/wmr_interface.h"
+
+#include <assert.h>
+
+#ifndef XRT_BUILD_DRIVER_WMR
+#error "Must only be built with XRT_BUILD_DRIVER_WMR set"
+#endif
+
+
+/*
+ *
+ * Various helper functions and lists.
+ *
+ */
+
+static const char *driver_list[] = {
+    "wmr",
+};
+
+
+/*
+ *
+ * Member functions.
+ *
+ */
+
+static xrt_result_t
+wmr_estimate_system(struct xrt_builder *xb,
+                    cJSON *config,
+                    struct xrt_prober *xp,
+                    struct xrt_builder_estimate *out_estimate)
+{
+	return XRT_SUCCESS;
+}
+
+static xrt_result_t
+wmr_open_system(struct xrt_builder *xb,
+                cJSON *config,
+                struct xrt_prober *xp,
+                struct xrt_system_devices **out_xsysd,
+                struct xrt_space_overseer **out_xso)
+{
+	return XRT_SUCCESS;
+}
+
+static void
+wmr_destroy(struct xrt_builder *xb)
+{
+	free(xb);
+}
+
+
+/*
+ *
+ * 'Exported' functions.
+ *
+ */
+
+struct xrt_builder *
+t_builder_wmr_create(void)
+{
+	struct xrt_builder *xb = U_TYPED_CALLOC(struct xrt_builder);
+	xb->estimate_system = wmr_estimate_system;
+	xb->open_system = wmr_open_system;
+	xb->destroy = wmr_destroy;
+	xb->identifier = "wmr";
+	xb->name = "Windows Mixed Reality";
+	xb->driver_identifiers = driver_list;
+	xb->driver_identifier_count = ARRAY_SIZE(driver_list);
+
+	return xb;
+}

src/xrt/targets/common/target_lists.c

@@ -1,4 +1,4 @@
-// Copyright 2019-2022, Collabora, Ltd.
+// Copyright 2019-2023, Collabora, Ltd.
 // SPDX-License-Identifier: BSL-1.0
 /*!
  * @file
@@ -124,6 +124,10 @@ xrt_builder_create_func_t target_builder_list[] = {
     t_builder_north_star_create,
 #endif // T_BUILDER_NS
 
+#ifdef T_BUILDER_WMR
+    t_builder_wmr_create,
+#endif // T_BUILDER_WMR
+
 #ifdef T_BUILDER_LEGACY
     t_builder_legacy_create,
 #endif // T_BUILDER_LEGACY