From 69fd6956606374ab935079aa426ae7f8c6913765 Mon Sep 17 00:00:00 2001
From: m154k1 <139042094+m154k1@users.noreply.github.com>
Date: Sun, 19 Oct 2025 16:27:57 +0300
Subject: [PATCH] CMake: Add MVK_USE_METAL_PRIVATE_API option

---
 CMakeLists.txt        |  4 +++-
 Common/CMakeLists.txt | 11 ++++++++++-
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 841d2522..86d2e917 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -65,6 +65,8 @@ project(MoltenVK
 set(MVK_CONFIG_LOG_LEVEL "info" CACHE STRING "Set the default log level for MoltenVK. Options are: debug, info, warn, error, off. Default is 'info'.")
 set_property(CACHE MVK_CONFIG_LOG_LEVEL PROPERTY STRINGS "debug" "info" "warn" "error" "off")
 
+option(MVK_USE_METAL_PRIVATE_API "If enabled, MoltenVK will use private interfaces exposed by Metal to implement Vulkan features that are difficult to support otherwise." OFF)
+
 # Set default minimum C++ standard
 if(MOLTEN_VK_TOPLEVEL_PROJECT)
 	set(CMAKE_CXX_STANDARD 17)
@@ -118,4 +120,4 @@ if(MOLTEN_VK_TOPLEVEL_PROJECT)
 			DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/pkgconfig)
 
 	install(TARGETS MoltenVKShaderConverter)
-endif()
\ No newline at end of file
+endif()
diff --git a/Common/CMakeLists.txt b/Common/CMakeLists.txt
index e1a08764..38873d90 100644
--- a/Common/CMakeLists.txt
+++ b/Common/CMakeLists.txt
@@ -63,4 +63,13 @@ else()
 endif()
 target_compile_definitions(MoltenVK_Common PUBLIC
 	MVK_CONFIG_LOG_LEVEL=${MVK_CONFIG_LOG_LEVEL_NUM}
-)
\ No newline at end of file
+)
+
+if(MVK_USE_METAL_PRIVATE_API)
+    set(MVK_USE_METAL_PRIVATE_API_NUM 1)
+else()
+    set(MVK_USE_METAL_PRIVATE_API_NUM 0)
+endif()
+target_compile_definitions(MoltenVK_Common PUBLIC
+    MVK_USE_METAL_PRIVATE_API=${MVK_USE_METAL_PRIVATE_API_NUM}
+)