Vulkan: reuse device using config (#205)

If `VkPhysicalDevice`, `VkDevice`, `VkQueue`, queue family index,
required features and extensions are given, Amber reuses them.

Fixes #124 

2 files changed, 39 insertions, 2 deletions

diff --git a/include/amber/amber_vulkan.h b/include/amber/amber_vulkan.h
index 084a2c9..1f38ab1 100644
--- a/include/amber/amber_vulkan.h
+++ b/include/amber/amber_vulkan.h
@@ -15,14 +15,38 @@
 #ifndef AMBER_AMBER_VULKAN_H_
 #define AMBER_AMBER_VULKAN_H_
 
+#include <limits>
+#include <string>
+#include <vector>
+
+#include "amber/amber.h"
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wzero-as-null-pointer-constant"
 #include "vulkan/vulkan.h"
+#pragma clang diagnostic pop
 
 namespace amber {
 
 /// Configuration for the Vulkan Engine.
 struct VulkanEngineConfig : public EngineConfig {
-  /// The VkDevice to use for the tests.
-  VkDevice device;
+  /// The VkPhysicalDevice to use.
+  VkPhysicalDevice physical_device = VK_NULL_HANDLE;
+
+  /// Physical device features available for |physical_device|.
+  VkPhysicalDeviceFeatures available_features = {};
+
+  /// Physical device extensions available for |physical_device|.
+  std::vector<std::string> available_extensions;
+
+  /// The given queue family index to use.
+  uint32_t queue_family_index = std::numeric_limits<uint32_t>::max();
+
+  /// The VkDevice to use.
+  VkDevice device = VK_NULL_HANDLE;
+
+  /// The VkQueue to use.
+  VkQueue queue = VK_NULL_HANDLE;
 };
 
 }  // namespace amber
diff --git a/include/amber/recipe.h b/include/amber/recipe.h
index 3dd932c..d33c479 100644
--- a/include/amber/recipe.h
+++ b/include/amber/recipe.h
@@ -16,6 +16,7 @@
 #define AMBER_RECIPE_H_
 
 #include <memory>
+#include <string>
 #include <utility>
 #include <vector>
 
@@ -31,6 +32,12 @@ class RecipeImpl {
   /// Retrieves information on all the shaders in the given recipe.
   virtual std::vector<ShaderInfo> GetShaderInfo() const = 0;
 
+  /// Returns required features in the given recipe.
+  virtual std::vector<std::string> GetRequiredFeatures() const = 0;
+
+  /// Returns required extensions in the given recipe.
+  virtual std::vector<std::string> GetRequiredExtensions() const = 0;
+
  protected:
   RecipeImpl();
 };
@@ -47,6 +54,12 @@ class Recipe {
   RecipeImpl* GetImpl() const { return impl_.get(); }
   void SetImpl(std::unique_ptr<RecipeImpl> impl) { impl_ = std::move(impl); }
 
+  /// Returns required features in the given recipe.
+  std::vector<std::string> GetRequiredFeatures() const;
+
+  /// Returns required extensions in the given recipe.
+  std::vector<std::string> GetRequiredExtensions() const;
+
  private:
   std::unique_ptr<RecipeImpl> impl_;
 };