diff --git a/Cargo.lock b/Cargo.lock
index 38dc7b0..47cc2c7 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -558,6 +558,7 @@ dependencies = [
  "paste",
  "safer-ffi",
  "thiserror",
+ "windows",
 ]
 
 [[package]]
diff --git a/librashader-capi/Cargo.toml b/librashader-capi/Cargo.toml
index 6bc76b7..3603571 100644
--- a/librashader-capi/Cargo.toml
+++ b/librashader-capi/Cargo.toml
@@ -16,8 +16,9 @@ publish = false
 crate-type = [ "cdylib", "staticlib", "lib" ]
 
 [features]
-#default = ["runtime-opengl"]
+default = ["runtime-opengl", "runtime-d3d11"]
 runtime-opengl = ["gl", "librashader/gl"]
+runtime-d3d11 = ["windows", "librashader/d3d11"]
 headers = ["safer-ffi/headers"]
 
 [dependencies]
@@ -27,5 +28,23 @@ paste = "1.0.9"
 gl = { version = "0.14.0", optional = true }
 safer-ffi = { version = "0.0.10", repository = "https://github.com/getditto/safer_ffi" }
 
+[dependencies.windows]
+version = "0.43.0"
+features = [
+    "Win32_Foundation",
+    "Win32_Graphics_Dxgi_Common",
+    "Win32_Graphics_Direct3D",
+    "Win32_Graphics_Direct3D11",
+    "Win32_Graphics_Direct3D_Fxc",
+    "Win32_Graphics_Gdi",
+    "Win32_Security",
+    "Win32_System_LibraryLoader",
+    "Win32_System_Threading",
+    "Win32_System_WindowsProgramming",
+    "Win32_UI_WindowsAndMessaging",
+]
+optional = true
+
+
 [build-dependencies]
 cbindgen = "0.24.3"
diff --git a/librashader-capi/librashader.h b/librashader-capi/librashader.h
index beaa6e2..3abf8a9 100644
--- a/librashader-capi/librashader.h
+++ b/librashader-capi/librashader.h
@@ -86,8 +86,6 @@ typedef struct frame_gl_opt_t {
   int32_t frame_direction;
 } frame_gl_opt_t;
 
-typedef libra_error_t (*PFN_lbr_load_preset)(const char*, libra_shader_preset_t*);
-
 typedef libra_error_t (*PFN_lbr_preset_free)(libra_shader_preset_t*);
 
 typedef libra_error_t (*PFN_lbr_preset_set_param)(libra_shader_preset_t*, const char*, float);
@@ -109,8 +107,8 @@ extern "C" {
 ///  - `out` must be either null, or an aligned pointer to an uninitialized or invalid `libra_shader_preset_t`.
 /// ## Returns
 ///  - If any parameters are null, `out` is unchanged, and this function returns `LIBRA_ERR_INVALID_PARAMETER`.
-libra_error_t libra_load_preset(const char *filename,
-                                libra_shader_preset_t *out);
+libra_error_t libra_preset_create(const char *filename,
+                                  libra_shader_preset_t *out);
 
 /// Free the preset.
 ///
diff --git a/librashader-capi/src/ctypes.rs b/librashader-capi/src/ctypes.rs
index ae85cbc..cd2cd08 100644
--- a/librashader-capi/src/ctypes.rs
+++ b/librashader-capi/src/ctypes.rs
@@ -1,3 +1,4 @@
+//! Binding types for the librashader C API.
 use std::ptr::NonNull;
 use librashader::presets::ShaderPreset;
 use crate::error::LibrashaderError;
@@ -8,6 +9,9 @@ pub type libra_error_t = Option<NonNull<LibrashaderError>>;
 #[cfg(feature = "runtime-opengl")]
 pub type libra_gl_filter_chain_t = Option<NonNull<librashader::runtime::gl::FilterChainGL>>;
 
+#[cfg(feature = "runtime-d3d11")]
+pub type libra_d3d11_filter_chain_t = Option<NonNull<librashader::runtime::d3d11::FilterChainD3D11>>;
+
 /// Parameters for the output viewport.
 #[repr(C)]
 pub struct libra_viewport_t {
diff --git a/librashader-capi/src/error.rs b/librashader-capi/src/error.rs
index 4781b13..822c9b2 100644
--- a/librashader-capi/src/error.rs
+++ b/librashader-capi/src/error.rs
@@ -1,3 +1,4 @@
+//! The librashader error C API. (`libra_error_*`).
 use std::any::Any;
 use std::ffi::{c_char, CStr, CString};
 use std::mem::MaybeUninit;
diff --git a/librashader-capi/src/presets.rs b/librashader-capi/src/presets.rs
index c1c65d2..7d206c6 100644
--- a/librashader-capi/src/presets.rs
+++ b/librashader-capi/src/presets.rs
@@ -1,3 +1,4 @@
+//! The librashader preset C API (`libra_preset_*`).
 use std::ffi::{c_char, CStr, CString};
 use std::mem::{MaybeUninit};
 use librashader::presets::ShaderPreset;
@@ -32,7 +33,7 @@ use std::ptr::NonNull;
 //     }
 // }
 
-pub type PFN_lbr_load_preset = unsafe extern "C" fn (*const c_char, *mut MaybeUninit<libra_shader_preset_t>) -> libra_error_t;
+pub type PFN_lbr_preset_create = unsafe extern "C" fn (*const c_char, *mut MaybeUninit<libra_shader_preset_t>) -> libra_error_t;
 
 /// Load a preset.
 ///
@@ -42,7 +43,7 @@ pub type PFN_lbr_load_preset = unsafe extern "C" fn (*const c_char, *mut MaybeUn
 /// ## Returns
 ///  - If any parameters are null, `out` is unchanged, and this function returns `LIBRA_ERR_INVALID_PARAMETER`.
 #[no_mangle]
-pub unsafe extern "C" fn libra_load_preset(filename: *const c_char, out: *mut MaybeUninit<libra_shader_preset_t>) -> libra_error_t {
+pub unsafe extern "C" fn libra_preset_create(filename: *const c_char, out: *mut MaybeUninit<libra_shader_preset_t>) -> libra_error_t {
     ffi_body!({
         assert_non_null!(filename);
         assert_non_null!(out);
diff --git a/librashader-capi/src/runtime/d3d11.rs b/librashader-capi/src/runtime/d3d11/filter_chain.rs
similarity index 100%
rename from librashader-capi/src/runtime/d3d11.rs
rename to librashader-capi/src/runtime/d3d11/filter_chain.rs
diff --git a/librashader-capi/src/runtime/d3d11/mod.rs b/librashader-capi/src/runtime/d3d11/mod.rs
new file mode 100644
index 0000000..f5cc5ab
--- /dev/null
+++ b/librashader-capi/src/runtime/d3d11/mod.rs
@@ -0,0 +1,4 @@
+//! C API for the librashader OpenGL Runtime (`libra_d3d11_*`)
+
+mod filter_chain;
+pub use filter_chain::*;
\ No newline at end of file
diff --git a/librashader-capi/src/runtime/gl/mod.rs b/librashader-capi/src/runtime/gl/mod.rs
index d28780f..f3d1186 100644
--- a/librashader-capi/src/runtime/gl/mod.rs
+++ b/librashader-capi/src/runtime/gl/mod.rs
@@ -1 +1,4 @@
-pub mod filter_chain;
+//! C API for the librashader OpenGL Runtime (`libra_gl_*`)
+
+mod filter_chain;
+pub use filter_chain::*;
\ No newline at end of file
diff --git a/librashader-capi/src/runtime/mod.rs b/librashader-capi/src/runtime/mod.rs
index 2f89d9f..a5a21a6 100644
--- a/librashader-capi/src/runtime/mod.rs
+++ b/librashader-capi/src/runtime/mod.rs
@@ -1,2 +1,6 @@
+//! librashader runtime C APIs
 #[cfg(feature = "runtime-opengl")]
-mod gl;
\ No newline at end of file
+pub mod gl;
+
+#[cfg(feature = "runtime-d3d11")]
+pub mod d3d11;
\ No newline at end of file
diff --git a/librashader-runtime-d3d11/src/options.rs b/librashader-runtime-d3d11/src/options.rs
index 571cdb2..83b0cff 100644
--- a/librashader-runtime-d3d11/src/options.rs
+++ b/librashader-runtime-d3d11/src/options.rs
@@ -1,12 +1,20 @@
+/// Options for each Direct3D11 shader frame.
 #[repr(C)]
 #[derive(Debug, Clone)]
 pub struct FrameOptionsD3D11 {
+    /// Whether or not to clear the history buffers.
     pub clear_history: bool,
+    /// The direction of the frame. 1 should be vertical.
     pub frame_direction: i32,
 }
 
+/// Options for Direct3D11 filter chain creation.
 #[repr(C)]
 #[derive(Debug, Clone)]
 pub struct FilterChainOptionsD3D11 {
+    /// Use a deferred context to record shader rendering state.
+    ///
+    /// The deferred context will be executed on the immediate context
+    /// with `RenderContextState = true`.
     pub use_deferred_context: bool,
 }
diff --git a/librashader-runtime-gl/src/options.rs b/librashader-runtime-gl/src/options.rs
index 2bf869d..0f60f1c 100644
--- a/librashader-runtime-gl/src/options.rs
+++ b/librashader-runtime-gl/src/options.rs
@@ -1,13 +1,19 @@
+/// Options for each OpenGL shader frame.
 #[repr(C)]
 #[derive(Debug, Clone)]
 pub struct FrameOptionsGL {
+    /// Whether or not to clear the history buffers.
     pub clear_history: bool,
+    /// The direction of the frame. 1 should be vertical.
     pub frame_direction: i32,
 }
 
+/// Options for filter chain creation.
 #[repr(C)]
 #[derive(Debug, Clone)]
 pub struct FilterChainOptionsGL {
+    /// The GLSL version. Should be at least `330`.
     pub gl_version: u16,
+    /// Whether or not to use the Direct State Access APIs. Only available on OpenGL 4.5+.
     pub use_dsa: bool,
 }