Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 57 insertions, 0 deletions

diff --git a/gfx/angle/checkout/src/common/vulkan/libvulkan_loader.cpp b/gfx/angle/checkout/src/common/vulkan/libvulkan_loader.cpp
new file mode 100644
index 0000000000..dafe092732
--- /dev/null
+++ b/gfx/angle/checkout/src/common/vulkan/libvulkan_loader.cpp
@@ -0,0 +1,57 @@
+//
+// Copyright 2021 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// libvulkan_loader.cpp:
+//    Helper functions for the loading Vulkan libraries.
+//
+
+#include "common/vulkan/libvulkan_loader.h"
+
+#include "common/system_utils.h"
+
+namespace angle
+{
+namespace vk
+{
+void *OpenLibVulkan()
+{
+    constexpr const char *kLibVulkanNames[] = {
+#if defined(ANGLE_PLATFORM_WINDOWS)
+        "vulkan-1.dll",
+#elif defined(ANGLE_PLATFORM_APPLE)
+        "libvulkan.dylib",
+        "libvulkan.1.dylib",
+        "libMoltenVK.dylib"
+#else
+        "libvulkan.so",
+        "libvulkan.so.1",
+#endif
+    };
+
+    constexpr SearchType kSearchTypes[] = {
+// On Android, Fuchsia and GGP we use the system libvulkan.
+#if defined(ANGLE_USE_CUSTOM_LIBVULKAN)
+        SearchType::ModuleDir,
+#else
+        SearchType::SystemDir,
+#endif  // defined(ANGLE_USE_CUSTOM_LIBVULKAN)
+    };
+
+    for (angle::SearchType searchType : kSearchTypes)
+    {
+        for (const char *libraryName : kLibVulkanNames)
+        {
+            void *library = OpenSystemLibraryWithExtension(libraryName, searchType);
+            if (library)
+            {
+                return library;
+            }
+        }
+    }
+
+    return nullptr;
+}
+}  // namespace vk
+}  // namespace angle