From f849e33452df159eceec9ae1e8d3d127caafc907 Mon Sep 17 00:00:00 2001
From: Aiden Lambert <aidenramen29@gmail.com>
Date: Tue, 21 Jun 2022 16:03:06 -0500
Subject: FindVulkan: Add 'volk' component

---
 Help/release/dev/findvulkan-volk.rst |  5 +++++
 Modules/FindVulkan.cmake             | 41 ++++++++++++++++++++++++++++++++++++
 Tests/FindVulkan/Test/CMakeLists.txt |  5 +++++
 Tests/FindVulkan/Test/main-volk.cxx  | 14 ++++++++++++
 4 files changed, 65 insertions(+)
 create mode 100644 Help/release/dev/findvulkan-volk.rst
 create mode 100644 Tests/FindVulkan/Test/main-volk.cxx

diff --git a/Help/release/dev/findvulkan-volk.rst b/Help/release/dev/findvulkan-volk.rst
new file mode 100644
index 0000000..cb77078
--- /dev/null
+++ b/Help/release/dev/findvulkan-volk.rst
@@ -0,0 +1,5 @@
+findvulkan-volk
+---------------
+
+* The :module:`FindVulkan` module now includes a ``volk`` component
+  for the Volk open source vulkan meta-loader.
diff --git a/Modules/FindVulkan.cmake b/Modules/FindVulkan.cmake
index 8b322ed..78b07c4 100644
--- a/Modules/FindVulkan.cmake
+++ b/Modules/FindVulkan.cmake
@@ -70,6 +70,11 @@ This module defines :prop_tgt:`IMPORTED` targets if Vulkan has been found:
   Defined if SDK has the Khronos library which implement a subset of Vulkan API
   over Apple Metal graphics framework. (MoltenVK).
 
+``Vulkan::volk``
+  .. versionadded:: 3.25
+
+  Defined if SDK has the Vulkan meta-loader (volk).
+
 Result Variables
 ^^^^^^^^^^^^^^^^
 
@@ -109,6 +114,10 @@ This module defines the following variables:
   .. versionadded:: 3.24
 
   True, if the SDK has the MoltenVK library.
+``Vulkan_volk_FOUND``
+  .. versionadded:: 3.25
+
+  True, if the SDK has the volk library.
 
 The module will also defines these cache variables:
 
@@ -137,6 +146,11 @@ The module will also defines these cache variables:
 
   Path to the MoltenVK library.
 
+``Vulkan_volk_LIBRARY``
+  .. versionadded:: 3.25
+
+  Path to the volk library.
+
 Hints
 ^^^^^
 
@@ -374,6 +388,13 @@ if(MoltenVK IN_LIST Vulkan_FIND_COMPONENTS)
     )
   mark_as_advanced(Vulkan_MoltenVK_INCLUDE_DIR)
 endif()
+if(volk IN_LIST Vulkan_FIND_COMPONENTS)
+  find_library(Vulkan_volk_LIBRARY
+          NAMES volk
+          HINTS
+            ${_Vulkan_hint_library_search_paths})
+  mark_as_advanced(Vulkan_Volk_LIBRARY)
+endif()
 
 if(Vulkan_GLSLC_EXECUTABLE)
   set(Vulkan_glslc_FOUND TRUE)
@@ -437,6 +458,7 @@ _Vulkan_set_library_component_found(glslang
     glslang-genericcodegen)
 _Vulkan_set_library_component_found(shaderc_combined)
 _Vulkan_set_library_component_found(SPIRV-Tools)
+_Vulkan_set_library_component_found(volk)
 
 if(Vulkan_MoltenVK_INCLUDE_DIR AND Vulkan_MoltenVK_LIBRARY)
   set(Vulkan_MoltenVK_FOUND TRUE)
@@ -723,6 +745,25 @@ if(Vulkan_FOUND)
           IMPORTED_LOCATION_DEBUG "${Vulkan_SPIRV-Tools_DEBUG_LIBRARY}")
     endif()
   endif()
+
+  if(Vulkan_volk_LIBRARY AND NOT TARGET Vulkan::volk)
+    add_library(Vulkan::volk STATIC IMPORTED)
+    set_property(TARGET Vulkan::volk
+            PROPERTY
+              INTERFACE_INCLUDE_DIRECTORIES "${Vulkan_INCLUDE_DIRS}")
+    set_property(TARGET Vulkan::volk APPEND
+            PROPERTY
+              IMPORTED_CONFIGURATIONS Release)
+    set_property(TARGET Vulkan::volk APPEND
+            PROPERTY
+              IMPORTED_LOCATION_RELEASE "${Vulkan_volk_LIBRARY}")
+
+    if (NOT WIN32)
+      set_property(TARGET Vulkan::volk APPEND
+              PROPERTY
+                IMPORTED_LINK_INTERFACE_LIBRARIES dl)
+    endif()
+  endif()
 endif()
 
 if(Vulkan_MoltenVK_FOUND)
diff --git a/Tests/FindVulkan/Test/CMakeLists.txt b/Tests/FindVulkan/Test/CMakeLists.txt
index 42543ac..727e1ce 100644
--- a/Tests/FindVulkan/Test/CMakeLists.txt
+++ b/Tests/FindVulkan/Test/CMakeLists.txt
@@ -7,6 +7,7 @@ set(components
   glslang
   shaderc_combined
   SPIRV-Tools
+  volk
 )
 if(APPLE)
   list(APPEND components MoltenVK)
@@ -75,6 +76,10 @@ if(APPLE)
   add_test(NAME test_tgt_MoltenVK COMMAND test_tgt_MoltenVK)
 endif()
 
+add_executable(test_tgt_volk main-volk.cxx)
+target_link_libraries(test_tgt_volk Vulkan::volk)
+add_test(NAME test_tgt_volk COMMAND test_tgt_volk)
+
 if(Vulkan_GLSLC_EXECUTABLE)
   add_test(NAME test_glslc
     COMMAND ${CMAKE_COMMAND}
diff --git a/Tests/FindVulkan/Test/main-volk.cxx b/Tests/FindVulkan/Test/main-volk.cxx
new file mode 100644
index 0000000..2ec9fb4
--- /dev/null
+++ b/Tests/FindVulkan/Test/main-volk.cxx
@@ -0,0 +1,14 @@
+#include <iostream>
+
+#include <volk/volk.h>
+
+int main()
+{
+  if (volkInitialize() != VK_SUCCESS) {
+    std::cout << "volk initialization success!" << std::endl;
+  } else {
+    std::cout << "volk initialization failure!" << std::endl;
+  }
+
+  return 0;
+}
-- 
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