tests/wayland-test-clients: Add gbm_device to WaylandDisplay

We'll use this later to allocate dma-bufs from.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3350>

src/tests/wayland-test-clients/meson.build

@@ -20,10 +20,6 @@ wayland_test_clients = [
   },
   {
     'name': 'dma-buf-scanout',
-    'extra_deps': [
-      libdrm_dep,
-      libgbm_dep,
-    ],
   },
   {
     'name': 'fractional-scale',
@@ -92,6 +88,8 @@ foreach test : wayland_test_clients
     glib_dep,
     gobject_dep,
     wayland_client_dep,
+    libdrm_dep,
+    libgbm_dep,
     m_dep,
   ]
   if test.has_key('extra_deps')

src/tests/wayland-test-clients/wayland-test-client-utils.c

@@ -107,6 +107,26 @@ create_anonymous_file (off_t size)
   return fd;
 }
 
+static struct gbm_device *
+create_gbm_device (WaylandDisplay *display)
+{
+  const char *gpu_path;
+  int fd;
+
+  gpu_path = lookup_property_value (display, "gpu-path");
+  if (!gpu_path)
+    return NULL;
+
+  fd = open (gpu_path, O_RDWR);
+  if (fd < 0)
+    {
+      g_error ("Failed to open drm render node %s: %s",
+               gpu_path, g_strerror (errno));
+    }
+
+  return gbm_create_device (fd);
+}
+
 static void
 handle_xdg_wm_base_ping (void               *user_data,
                          struct xdg_wm_base *xdg_wm_base,
@@ -261,6 +281,8 @@ wayland_display_new_full (WaylandDisplayCapabilities  capabilities,
 
   wl_display_roundtrip (display->display);
 
+  display->gbm_device = create_gbm_device (display);
+
   return display;
 }
 

src/tests/wayland-test-clients/wayland-test-client-utils.h

@@ -1,5 +1,7 @@
 #pragma once
 
+#include <drm_fourcc.h>
+#include <gbm.h>
 #include <glib-object.h>
 #include <stdio.h>
 #include <wayland-client.h>
@@ -37,6 +39,8 @@ typedef struct _WaylandDisplay
   uint32_t sync_event_serial_next;
 
   GHashTable *properties;
+
+  struct gbm_device *gbm_device;
 } WaylandDisplay;
 
 #define WAYLAND_TYPE_DISPLAY (wayland_display_get_type ())