Now using Volk rather than statically linking the Vulkan loader

.gitmodules

@@ -10,3 +10,9 @@
 [submodule "3rdparty/glslang"]
 	path = 3rdparty/glslang
 	url = git@github.com:KhronosGroup/glslang.git
+[submodule "3rdparty/vulkan"]
+	path = 3rdparty/vulkan
+	url = https://github.com/KhronosGroup/Vulkan-Headers
+[submodule "3rdparty/volk"]
+	path = 3rdparty/volk
+	url = https://github.com/zeux/volk

CMakeLists.txt

@@ -109,11 +109,49 @@ include_directories(hydra/include)
 list (APPEND EXTRA_LIBS hydra)
 
 # ---- Vulkan ----
-if(NOT ANDROID)
-find_package(Vulkan REQUIRED)
-list (APPEND EXTRA_LIBS Vulkan::Vulkan)
+add_library(vulkan INTERFACE)
+set(VULKAN_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/3rdparty/vulkan/include)
+target_sources(vulkan INTERFACE ${VULKAN_INCLUDE_DIR}/vulkan/vulkan.h)
+target_include_directories(vulkan INTERFACE ${VULKAN_INCLUDE_DIR})
+
+target_compile_definitions(vulkan INTERFACE VK_NO_PROTOTYPES)
+
+if(ANDROID)
+    target_compile_definitions(vulkan INTERFACE VK_USE_PLATFORM_ANDROID_KHR)
+elseif(WIN32)
+    target_compile_definitions(vulkan INTERFACE VK_USE_PLATFORM_WIN32_KHR)
+elseif(APPLE)
+    target_compile_definitions(vulkan INTERFACE VK_USE_PLATFORM_MACOS_MVK)
+elseif(UNIX)
+    # See whether X11 is available. If not, fall back to direct-to-display mode.
+    find_package(X11 QUIET)
+    if (X11_FOUND)
+        target_compile_definitions(vulkan INTERFACE VK_USE_PLATFORM_XCB_KHR)
+    else()
+        set(DIRECT_TO_DISPLAY TRUE)
+        set(DIRECT_TO_DISPLAY TRUE PARENT_SCOPE)
+        target_compile_definitions(vulkan INTERFACE VK_USE_PLATFORM_DISPLAY_KHR)
+    endif()
 endif()
 
+list (APPEND EXTRA_LIBS vulkan)
+
+# ---- Volk ----
+# volk
+set(VOLK_DIR "${CMAKE_CURRENT_SOURCE_DIR}/3rdparty/volk")
+set(VOLK_FILES
+    "${VOLK_DIR}/volk.c"
+    "${VOLK_DIR}/volk.h")
+
+add_library(volk STATIC ${VOLK_FILES})
+
+target_link_libraries(volk PUBLIC vulkan)
+
+target_include_directories(volk PUBLIC ${VOLK_DIR})
+
+set_property(TARGET volk PROPERTY FOLDER "3rdparty")
+
+list (APPEND EXTRA_LIBS volk)
 
 # ---- GLSlang ----
 if(NOT ANDROID)

kraken/KRContext.cpp

@@ -640,6 +640,12 @@ void KRContext::receivedMemoryWarning()
 void
 KRContext::createDeviceContexts()
 {
+  VkResult res = volkInitialize();
+  if (res != VK_SUCCESS) {
+    destroyDeviceContexts();
+    return;
+  }
+
   // initialize the VkApplicationInfo structure
   VkApplicationInfo app_info = {};
   app_info.sType = VK_STRUCTURE_TYPE_APPLICATION_INFO;
@@ -662,10 +668,12 @@ KRContext::createDeviceContexts()
   inst_info.enabledLayerCount = 0;
   inst_info.ppEnabledLayerNames = NULL;
 
-  VkResult res = vkCreateInstance(&inst_info, NULL, &m_vulkanInstance);
+  res = vkCreateInstance(&inst_info, NULL, &m_vulkanInstance);
   if (res != VK_SUCCESS) {
     destroyDeviceContexts();
   }
+
+  volkLoadInstance(m_vulkanInstance);
 }
 
 void

kraken/KREngine-common.h

@@ -100,6 +100,7 @@ using std::unordered_multimap;
 using std::hash;
 
 #include <vulkan/vulkan.h>
+#include <volk.h>
 #if defined(ANDROID)
 #include <GLES3/gl3.h>
 #include <GLES3/gl3ext.h>