vulkan: Guard dmabuf code with HAVE_DMABUF

gdk/gdkvulkancontext.c

@@ -1826,6 +1826,8 @@ gdk_display_unref_vulkan (GdkDisplay *display)
   display->vk_instance = VK_NULL_HANDLE;
 }
 
+#ifdef HAVE_DMABUF
+
 /* Hack. We don't include gsk/gsk.h here to avoid a build order problem
  * with the generated header gskenumtypes.h, so we need to hack around
  * a bit to access the gsk api we need.
@@ -1915,6 +1917,8 @@ gdk_vulkan_get_dmabuf_downloader (GdkDisplay              *display,
   return GDK_DMABUF_DOWNLOADER (renderer);
 }
 
+#endif
+
 VkShaderModule
 gdk_display_get_vk_shader_module (GdkDisplay *self,
                                   const char *resource_name)

gdk/gdkvulkancontextprivate.h

@@ -78,8 +78,10 @@ gboolean                gdk_display_init_vulkan                         (GdkDisp
 void                    gdk_display_ref_vulkan                          (GdkDisplay            *display);
 void                    gdk_display_unref_vulkan                        (GdkDisplay            *display);
 
+#ifdef HAVE_DMABUF
 GdkDmabufDownloader *   gdk_vulkan_get_dmabuf_downloader                (GdkDisplay            *display,
                                                                          GdkDmabufFormatsBuilder *builder);
+#endif
 
 VkShaderModule          gdk_display_get_vk_shader_module                (GdkDisplay            *display,
                                                                          const char            *resource_name);

gsk/gpu/gskgpudownloadop.c

@@ -69,6 +69,8 @@ gsk_gpu_download_op_print (GskGpuOp    *op,
 }
 
 #ifdef GDK_RENDERING_VULKAN
+
+#ifdef HAVE_DMABUF
 /* The code needs to run here because vkGetSemaphoreFdKHR() may
  * only be called after the semaphore has been submitted via
  * vkQueueSubmit().
@@ -102,6 +104,7 @@ gsk_gpu_download_op_vk_sync_semaphore (GskGpuDownloadOp *self)
 
   vkDestroySemaphore (display->vk_device, self->vk_semaphore, NULL);
 }
+#endif
 
 static void
 gsk_gpu_download_op_vk_create (GskGpuDownloadOp *self)