Restructure sys crate: split bindings per platform/backend, drop Vulkan SDK requirement

LICENSE_VulkanHeaders.md

@@ -0,0 +1,5 @@
+The Vulkan bindings in `unity-native-plugin-sys` are derived from the Vulkan API definitions published by The Khronos Group Inc.
+
+The Vulkan headers are licensed under the Apache License 2.0. See <https://github.com/KhronosGroup/Vulkan-Headers/blob/main/LICENSE.md> for details.
+
+Copyright © The Khronos Group Inc.

README.md

@@ -3,11 +3,6 @@ Unity Native Plugin API for Rust
 
 [LICENSE (MIT)](LICENSE)
 
-## Notice
-
-* Currently supports D3D11, D3D12, Vulkan, Metal
-* API is not stable.
-
 ## How to use
 
 * Define in Cargo.toml

unity-native-plugin-sys/Cargo.toml

@@ -13,9 +13,15 @@ keywords = ["unity", "ffi"]
 include = [
     "**/*.rs",
     "Cargo.toml",
-    "../LICENSE"
+    "../LICENSE",
+    "../LICENSE_UnityNativePluginAPI.md",
+    "../LICENSE_VulkanHeaders.md"
 ]
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
+[features]
+default = []
+vulkan = []
+
 [dependencies]

unity-native-plugin-sys/README.md

@@ -2,6 +2,4 @@ unity-native-plugin-rs
 ====
 
 * based on Unity 6000.3.8f1
-* Vulkan SDK 1.4.309.0
 * bindgen 0.72.1
-* clang version 14.0.0-1ubuntu1.1

unity-native-plugin-sys/bindgen_apple.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+
+bindgen \
+  --output ./src/plugin_api_apple.rs \
+  --with-derive-default \
+  --no-derive-debug \
+  --allowlist-file ./include/IUnityGraphicsMetal.h \
+  --blocklist-file ./include/IUnityInterface.h \
+  --blocklist-file ./include/IUnityGraphics.h \
+  --blocklist-file ./include/IUnityRenderingExtensions.h \
+  --blocklist-type "NSBundle|MTLRenderPassDescriptor|INSBundle|IMTLRenderPassDescriptor" \
+  --raw-line "pub type NSBundle = *mut u8;" \
+  --raw-line "pub type MTLRenderPassDescriptor = *mut u8;" \
+  ./wrappers/apple.hpp -- -x objective-c++ -I ./include
+sed -i.bak -e "s/extern \"C\"/extern \"system\"/g" ./src/plugin_api_apple.rs && rm ./src/plugin_api_apple.rs.bak

unity-native-plugin-sys/bindgen_core.sh

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+bindgen \
+  --output ./src/plugin_api_core.rs \
+  --with-derive-default \
+  --no-derive-debug \
+  --allowlist-file ./include/IUnityInterface.h \
+  --allowlist-file ./include/IUnityGraphics.h \
+  --allowlist-file ./include/IUnityRenderingExtensions.h \
+  --allowlist-file ./include/IUnityProfiler.h \
+  --allowlist-file ./include/IUnityProfilerCallbacks.h \
+  --allowlist-file ./include/IUnityMemoryManager.h \
+  --allowlist-file ./include/IUnityEventQueue.h \
+  --allowlist-file ./include/IUnityLog.h \
+  --allowlist-file ./include/IUnityShaderCompilerAccess.h \
+  ./wrappers/core.hpp -- -I ./include
+sed -i.bak -e "s/extern \"C\"/extern \"system\"/g" ./src/plugin_api_core.rs && rm ./src/plugin_api_core.rs.bak

unity-native-plugin-sys/bindgen_vulkan.sh

@@ -0,0 +1,12 @@
+#!/bin/sh
+
+bindgen \
+  --output ./src/plugin_api_vulkan.rs \
+  --with-derive-default \
+  --no-derive-debug \
+  --allowlist-file ./include/IUnityGraphicsVulkan.h \
+  --blocklist-file ./include/IUnityInterface.h \
+  --blocklist-file ./include/IUnityGraphics.h \
+  --blocklist-file ./include/IUnityRenderingExtensions.h \
+  ./wrappers/vulkan.hpp -- -I ./include -I ./wrappers
+sed -i.bak -e "s/extern \"C\"/extern \"system\"/g" ./src/plugin_api_vulkan.rs && rm ./src/plugin_api_vulkan.rs.bak

unity-native-plugin-sys/bindgen_windows.sh

@@ -0,0 +1,13 @@
+#!/bin/sh
+
+bindgen \
+  --output ./src/plugin_api_windows.rs \
+  --with-derive-default \
+  --no-derive-debug \
+  --allowlist-file ./include/IUnityGraphicsD3D11.h \
+  --allowlist-file ./include/IUnityGraphicsD3D12.h \
+  --blocklist-file ./include/IUnityInterface.h \
+  --blocklist-file ./include/IUnityGraphics.h \
+  --blocklist-file ./include/IUnityRenderingExtensions.h \
+  ./wrappers/windows.hpp -- -I ./include
+sed -i.bak -e "s/extern \"C\"/extern \"system\"/g" ./src/plugin_api_windows.rs && rm ./src/plugin_api_windows.rs.bak

unity-native-plugin-sys/src/lib.rs

@@ -5,9 +5,17 @@
 #![allow(clippy::pedantic)]
 #![allow(unnecessary_transmutes)]
 #![allow(unsafe_op_in_unsafe_fn)]
-include!("plugin_api.rs");
 
-include!("metal.rs");
+include!("plugin_api_core.rs");
+
+#[cfg(windows)]
+include!("plugin_api_windows.rs");
+
+#[cfg(target_vendor = "apple")]
+include!("plugin_api_apple.rs");
+
+#[cfg(feature = "vulkan")]
+include!("plugin_api_vulkan.rs");
 
 impl UnityInterfaceGUID {
     pub fn new(