1 files changed, 72 insertions, 0 deletions
diff --git a/gfx/angle/checkout/src/common/vulkan/vulkan_icd.h b/gfx/angle/checkout/src/common/vulkan/vulkan_icd.h
new file mode 100644
index 0000000000..b2921f8203
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+++ b/gfx/angle/checkout/src/common/vulkan/vulkan_icd.h
@@ -0,0 +1,72 @@
+//
+// Copyright 2020 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.
+//
+// vulkan_icd.h : Helper for creating vulkan instances & selecting physical device.
+
+#ifndef COMMON_VULKAN_VULKAN_ICD_H_
+#define COMMON_VULKAN_VULKAN_ICD_H_
+
+#include <string>
+
+#include "common/Optional.h"
+#include "common/angleutils.h"
+#include "common/vulkan/vk_headers.h"
+
+namespace angle
+{
+
+namespace vk
+{
+
+enum class ICD
+{
+    Default,
+    Mock,
+    SwiftShader,
+};
+
+struct SimpleDisplayWindow
+{
+    uint16_t width;
+    uint16_t height;
+};
+
+class [[nodiscard]] ScopedVkLoaderEnvironment : angle::NonCopyable
+{
+  public:
+    ScopedVkLoaderEnvironment(bool enableValidationLayers, vk::ICD icd);
+    ~ScopedVkLoaderEnvironment();
+
+    bool canEnableValidationLayers() const { return mEnableValidationLayers; }
+    vk::ICD getEnabledICD() const { return mICD; }
+
+  private:
+    bool setICDEnvironment(const char *icd);
+    bool setCustomExtensionsEnvironment();
+
+    bool mEnableValidationLayers;
+    vk::ICD mICD;
+    bool mChangedCWD;
+    Optional<std::string> mPreviousCWD;
+    bool mChangedICDEnv;
+    Optional<std::string> mPreviousICDEnv;
+    Optional<std::string> mPreviousCustomExtensionsEnv;
+    bool mChangedNoDeviceSelect;
+    Optional<std::string> mPreviousNoDeviceSelectEnv;
+};
+
+void ChoosePhysicalDevice(PFN_vkGetPhysicalDeviceProperties pGetPhysicalDeviceProperties,
+                          const std::vector<VkPhysicalDevice> &physicalDevices,
+                          vk::ICD preferredICD,
+                          uint32_t preferredVendorID,
+                          uint32_t preferredDeviceID,
+                          VkPhysicalDevice *physicalDeviceOut,
+                          VkPhysicalDeviceProperties *physicalDevicePropertiesOut);
+
+}  // namespace vk
+
+}  // namespace angle
+
+#endif  // COMMON_VULKAN_VULKAN_ICD_H_