Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2652 insertions, 0 deletions

diff --git a/third_party/rust/khronos-egl/src/lib.rs b/third_party/rust/khronos-egl/src/lib.rs
new file mode 100644
index 0000000000..a4f4a1a345
--- /dev/null
+++ b/third_party/rust/khronos-egl/src/lib.rs
@@ -0,0 +1,2652 @@
+//! This crate provides a binding for the Khronos EGL 1.5 API.
+//! It was originally a fork of the [egl](https://crates.io/crates/egl) crate,
+//! which is left unmaintained.
+//!
+//! ## Usage
+//!
+//! You can access the EGL API using an [`Instance`]
+//! object defined by either statically linking with `libEGL.so.1` at compile time,
+//! or dynamically loading the EGL library at runtime.
+//!
+//! ### Static linking
+//!
+//! You must enable static linking using the `static` feature in your `Cargo.toml`:
+//! ```toml
+//! khronos-egl = { version = ..., features = ["static"] }
+//! ```
+//!
+//! This will add a dependency to the [`pkg-config`](https://crates.io/crates/pkg-config) crate,
+//! necessary to find the EGL library at compile time.
+//! Here is a simple example showing how to use this library to create an EGL context when static linking is enabled.
+//!
+//! ```rust
+//! extern crate khronos_egl as egl;
+//!
+//! fn main() -> Result<(), egl::Error> {
+//!   // Create an EGL API instance.
+//!   // The `egl::Static` API implementation is only available when the `static` feature is enabled.
+//!   let egl = egl::Instance::new(egl::Static);
+//!
+//!   let wayland_display = wayland_client::Display::connect_to_env().expect("unable to connect to the wayland server");
+//!   let display = unsafe { egl.get_display(wayland_display.get_display_ptr() as *mut std::ffi::c_void) }.unwrap();
+//!   egl.initialize(display)?;
+//!
+//!   let attributes = [
+//!     egl::RED_SIZE, 8,
+//!     egl::GREEN_SIZE, 8,
+//!     egl::BLUE_SIZE, 8,
+//!     egl::NONE
+//!   ];
+//!
+//!   let config = egl.choose_first_config(display, &attributes)?.expect("unable to find an appropriate ELG configuration");
+//!
+//!   let context_attributes = [
+//!     egl::CONTEXT_MAJOR_VERSION, 4,
+//!     egl::CONTEXT_MINOR_VERSION, 0,
+//!     egl::CONTEXT_OPENGL_PROFILE_MASK, egl::CONTEXT_OPENGL_CORE_PROFILE_BIT,
+//!     egl::NONE
+//!   ];
+//!
+//!   egl.create_context(display, config, None, &context_attributes);
+//!
+//!   Ok(())
+//! }
+//! ```
+//!
+//! The creation of a `Display` instance is not detailed here since it depends on your display server.
+//! It is created using the `get_display` function with a pointer to the display server connection handle.
+//! For instance, if you are using the [wayland-client](https://crates.io/crates/wayland-client) crate,
+//! you can get this pointer using the `Display::get_display_ptr` method.
+//!
+//! #### Static API Instance
+//!
+//! It may be bothering in some applications to pass the `Instance` to every fonction that needs to call the EGL API.
+//! One workaround would be to define a static `Instance`,
+//! which should be possible to define at compile time using static linking.
+//! However this is not yet supported by the stable `rustc` compiler.
+//! With the nightly compiler,
+//! you can combine the `nightly` and `static` features so that this crate
+//! can provide a static `Instance`, called `API` that can then be accessed everywhere.
+//!
+//! ```
+//! # extern crate khronos_egl as egl;
+//! use egl::API as egl;
+//! ```
+//!
+//! ### Dynamic Linking
+//!
+//! Dynamic linking allows your application to accept multiple versions of EGL and be more flexible.
+//! You must enable dynamic linking using the `dynamic` feature in your `Cargo.toml`:
+//! ```toml
+//! khronos-egl = { version = ..., features = ["dynamic"] }
+//! ```
+//!
+//! This will add a dependency to the [`libloading`](https://crates.io/crates/libloading) crate,
+//! necessary to find the EGL library at runtime.
+//! You can then load the EGL API into a `Instance<Dynamic<libloading::Library>>` as follows:
+//!
+//! ```
+//! # extern crate khronos_egl as egl;
+//! let lib = unsafe { libloading::Library::new("libEGL.so.1") }.expect("unable to find libEGL.so.1");
+//! let egl = unsafe { egl::DynamicInstance::<egl::EGL1_4>::load_required_from(lib) }.expect("unable to load libEGL.so.1");
+//! ```
+//!
+//! Here, `egl::EGL1_4` is used to specify what is the minimum required version of EGL that must be provided by `libEGL.so.1`.
+//! This will return a `DynamicInstance<egl::EGL1_4>`, however in that case where `libEGL.so.1` provides a more recent version of EGL,
+//! you can still upcast ths instance to provide version specific features:
+//! ```
+//! # extern crate khronos_egl as egl;
+//! # let lib = unsafe { libloading::Library::new("libEGL.so.1") }.expect("unable to find libEGL.so.1");
+//! # let egl = unsafe { egl::DynamicInstance::<egl::EGL1_4>::load_required_from(lib) }.expect("unable to load libEGL.so.1");
+//! match egl.upcast::<egl::EGL1_5>() {
+//!   Some(egl1_5) => {
+//!     // do something with EGL 1.5
+//!   }
+//!   None => {
+//!     // do something with EGL 1.4 instead.
+//!   }
+//! };
+//! ```
+//!
+//! ## Troubleshooting
+//!
+//! ### Static Linking with OpenGL ES
+//!
+//! When using OpenGL ES with `khronos-egl` with the `static` feature,
+//! it is necessary to place a dummy extern at the top of your application which links libEGL first, then GLESv1/2.
+//! This is because libEGL provides symbols required by GLESv1/2.
+//! Here's how to work around this:
+//!
+//! ```
+//! ##[link(name = "EGL")]
+//! ##[link(name = "GLESv2")]
+//! extern {}
+//! ```
+#![allow(non_upper_case_globals)]
+#![allow(non_snake_case)]
+
+extern crate libc;
+
+use std::convert::{TryFrom, TryInto};
+use std::ffi::CStr;
+use std::ffi::CString;
+use std::fmt;
+use std::ptr;
+
+use libc::{c_char, c_uint, c_void};
+
+/// EGL API provider.
+pub trait Api {
+	/// Version of the provided EGL API.
+	fn version(&self) -> Version;
+}
+
+pub trait Downcast<V> {
+	fn downcast(&self) -> &V;
+}
+
+impl<T> Downcast<T> for T {
+	fn downcast(&self) -> &T {
+		self
+	}
+}
+
+pub trait Upcast<V> {
+	fn upcast(&self) -> Option<&V>;
+}
+
+impl<T> Upcast<T> for T {
+	fn upcast(&self) -> Option<&T> {
+		Some(self)
+	}
+}
+
+/// EGL API instance.
+///
+/// An instance wraps an interface to the EGL API and provide
+/// rust-friendly access to it.
+pub struct Instance<T> {
+	api: T,
+}
+
+impl<T> Instance<T> {
+	/// Cast the API.
+	#[inline(always)]
+	pub fn cast_into<U: From<T>>(self) -> Instance<U> {
+		Instance {
+			api: self.api.into(),
+		}
+	}
+
+	/// Try to cast the API.
+	#[inline(always)]
+	pub fn try_cast_into<U: TryFrom<T>>(self) -> Result<Instance<U>, Instance<U::Error>> {
+		match self.api.try_into() {
+			Ok(t) => Ok(Instance { api: t }),
+			Err(e) => Err(Instance { api: e }),
+		}
+	}
+
+	/// Returns the version of the provided EGL API.
+	#[inline(always)]
+	pub fn version(&self) -> Version
+	where
+		T: Api,
+	{
+		self.api.version()
+	}
+}
+
+impl<T> Instance<T> {
+	#[inline(always)]
+	pub const fn new(api: T) -> Instance<T> {
+		Instance { api }
+	}
+}
+
+impl<T: fmt::Debug> fmt::Debug for Instance<T> {
+	#[inline(always)]
+	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+		write!(f, "Instance({:?})", self.api)
+	}
+}
+
+impl<T> From<T> for Instance<T> {
+	#[inline(always)]
+	fn from(t: T) -> Instance<T> {
+		Instance::new(t)
+	}
+}
+
+// ------------------------------------------------------------------------------------------------
+// EGL 1.0
+// ------------------------------------------------------------------------------------------------
+
+#[cfg(feature = "1_0")]
+mod egl1_0 {
+	use super::*;
+
+	pub type Boolean = c_uint;
+	pub type Int = i32;
+	pub type Attrib = usize;
+	pub type EGLDisplay = *mut c_void;
+	pub type EGLConfig = *mut c_void;
+	pub type EGLContext = *mut c_void;
+	pub type EGLSurface = *mut c_void;
+	pub type NativeDisplayType = *mut c_void;
+
+	#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+	pub struct Display(EGLDisplay);
+
+	impl Display {
+		/// Creates a new display from its EGL pointer.
+		///
+		/// # Safety
+		///
+		/// `ptr` must be a valid `EGLDisplay` pointer.
+		#[inline]
+		pub unsafe fn from_ptr(ptr: EGLDisplay) -> Display {
+			Display(ptr)
+		}
+
+		#[inline]
+		pub fn as_ptr(&self) -> EGLDisplay {
+			self.0
+		}
+	}
+
+	#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+	pub struct Config(pub(crate) EGLConfig);
+
+	impl Config {
+		/// Creates a new configuration form its EGL pointer.
+		///
+		/// # Safety
+		///
+		/// `ptr` must be a valid `EGLConfig` pointer.
+		#[inline]
+		pub unsafe fn from_ptr(ptr: EGLConfig) -> Config {
+			Config(ptr)
+		}
+
+		#[inline]
+		pub fn as_ptr(&self) -> EGLConfig {
+			self.0
+		}
+	}
+
+	#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+	pub struct Context(pub(crate) EGLContext);
+
+	impl Context {
+		/// Creates a new context form its EGL pointer.
+		///
+		/// # Safety
+		///
+		/// `ptr` must be a valid `EGLContext` pointer.
+		#[inline]
+		pub unsafe fn from_ptr(ptr: EGLContext) -> Context {
+			Context(ptr)
+		}
+
+		#[inline]
+		pub fn as_ptr(&self) -> EGLContext {
+			self.0
+		}
+	}
+
+	#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+	pub struct Surface(EGLSurface);
+
+	impl Surface {
+		/// Creates a new surface form its EGL pointer.
+		///
+		/// # Safety
+		///
+		/// `ptr` must be a valid `EGLSurface` pointer.
+		#[inline]
+		pub unsafe fn from_ptr(ptr: EGLSurface) -> Surface {
+			Surface(ptr)
+		}
+
+		#[inline]
+		pub fn as_ptr(&self) -> EGLSurface {
+			self.0
+		}
+	}
+
+	#[cfg(not(android))]
+	pub type NativePixmapType = *mut c_void;
+
+	#[cfg(not(android))]
+	pub type NativeWindowType = *mut c_void;
+
+	#[repr(C)]
+	#[cfg(android)]
+	struct android_native_window_t;
+
+	#[repr(C)]
+	#[cfg(android)]
+	struct egl_native_pixmap_t;
+
+	#[cfg(android)]
+	pub type NativePixmapType = *mut egl_native_pixmap_t;
+
+	#[cfg(android)]
+	pub type NativeWindowType = *mut android_native_window_t;
+
+	pub const ALPHA_SIZE: Int = 0x3021;
+	pub const BAD_ACCESS: Int = 0x3002;
+	pub const BAD_ALLOC: Int = 0x3003;
+	pub const BAD_ATTRIBUTE: Int = 0x3004;
+	pub const BAD_CONFIG: Int = 0x3005;
+	pub const BAD_CONTEXT: Int = 0x3006;
+	pub const BAD_CURRENT_SURFACE: Int = 0x3007;
+	pub const BAD_DISPLAY: Int = 0x3008;
+	pub const BAD_MATCH: Int = 0x3009;
+	pub const BAD_NATIVE_PIXMAP: Int = 0x300A;
+	pub const BAD_NATIVE_WINDOW: Int = 0x300B;
+	pub const BAD_PARAMETER: Int = 0x300C;
+	pub const BAD_SURFACE: Int = 0x300D;
+	pub const BLUE_SIZE: Int = 0x3022;
+	pub const BUFFER_SIZE: Int = 0x3020;
+	pub const CONFIG_CAVEAT: Int = 0x3027;
+	pub const CONFIG_ID: Int = 0x3028;
+	pub const CORE_NATIVE_ENGINE: Int = 0x305B;
+	pub const DEPTH_SIZE: Int = 0x3025;
+	pub const DONT_CARE: Int = -1;
+	pub const DRAW: Int = 0x3059;
+	pub const EXTENSIONS: Int = 0x3055;
+	pub const FALSE: Boolean = 0;
+	pub const GREEN_SIZE: Int = 0x3023;
+	pub const HEIGHT: Int = 0x3056;
+	pub const LARGEST_PBUFFER: Int = 0x3058;
+	pub const LEVEL: Int = 0x3029;
+	pub const MAX_PBUFFER_HEIGHT: Int = 0x302A;
+	pub const MAX_PBUFFER_PIXELS: Int = 0x302B;
+	pub const MAX_PBUFFER_WIDTH: Int = 0x302C;
+	pub const NATIVE_RENDERABLE: Int = 0x302D;
+	pub const NATIVE_VISUAL_ID: Int = 0x302E;
+	pub const NATIVE_VISUAL_TYPE: Int = 0x302F;
+	pub const NONE: Int = 0x3038;
+	pub const ATTRIB_NONE: Attrib = 0x3038;
+	pub const NON_CONFORMANT_CONFIG: Int = 0x3051;
+	pub const NOT_INITIALIZED: Int = 0x3001;
+	pub const NO_CONTEXT: EGLContext = 0 as EGLContext;
+	pub const NO_DISPLAY: EGLDisplay = 0 as EGLDisplay;
+	pub const NO_SURFACE: EGLSurface = 0 as EGLSurface;
+	pub const PBUFFER_BIT: Int = 0x0001;
+	pub const PIXMAP_BIT: Int = 0x0002;
+	pub const READ: Int = 0x305A;
+	pub const RED_SIZE: Int = 0x3024;
+	pub const SAMPLES: Int = 0x3031;
+	pub const SAMPLE_BUFFERS: Int = 0x3032;
+	pub const SLOW_CONFIG: Int = 0x3050;
+	pub const STENCIL_SIZE: Int = 0x3026;
+	pub const SUCCESS: Int = 0x3000;
+	pub const SURFACE_TYPE: Int = 0x3033;
+	pub const TRANSPARENT_BLUE_VALUE: Int = 0x3035;
+	pub const TRANSPARENT_GREEN_VALUE: Int = 0x3036;
+	pub const TRANSPARENT_RED_VALUE: Int = 0x3037;
+	pub const TRANSPARENT_RGB: Int = 0x3052;
+	pub const TRANSPARENT_TYPE: Int = 0x3034;
+	pub const TRUE: Boolean = 1;
+	pub const VENDOR: Int = 0x3053;
+	pub const VERSION: Int = 0x3054;
+	pub const WIDTH: Int = 0x3057;
+	pub const WINDOW_BIT: Int = 0x0004;
+
+	/// EGL errors.
+	#[derive(Clone, Copy, PartialEq, Eq, Debug)]
+	pub enum Error {
+		/// EGL is not initialized, or could not be initialized, for the specified
+		/// EGL display connection.
+		NotInitialized,
+
+		/// EGL cannot access a requested resource (for example a context is bound
+		/// in another thread).
+		BadAccess,
+
+		/// EGL failed to allocate resources for the requested operation.
+		BadAlloc,
+
+		/// An unrecognized attribute or attribute value was passed in the attribute
+		/// list.
+		BadAttribute,
+
+		/// An Context argument does not name a valid EGL rendering context.
+		BadContext,
+
+		/// An Config argument does not name a valid EGL frame buffer configuration.
+		BadConfig,
+
+		/// The current surface of the calling thread is a window, pixel buffer or
+		/// pixmap that is no longer valid.
+		BadCurrentSurface,
+
+		/// An Display argument does not name a valid EGL display connection.
+		BadDisplay,
+
+		/// An Surface argument does not name a valid surface (window, pixel buffer
+		/// or pixmap) configured for GL rendering.
+		BadSurface,
+
+		/// Arguments are inconsistent (for example, a valid context requires
+		/// buffers not supplied by a valid surface).
+		BadMatch,
+
+		/// One or more argument values are invalid.
+		BadParameter,
+
+		/// A NativePixmapType argument does not refer to a valid native pixmap.
+		BadNativePixmap,
+
+		/// A NativeWindowType argument does not refer to a valid native window.
+		BadNativeWindow,
+
+		/// A power management event has occurred. The application must destroy all
+		/// contexts and reinitialise OpenGL ES state and objects to continue
+		/// rendering.
+		ContextLost,
+	}
+
+	impl std::error::Error for Error {
+		fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+			None
+		}
+	}
+
+	impl Error {
+		pub fn native(&self) -> Int {
+			use Error::*;
+			match self {
+				NotInitialized => NOT_INITIALIZED,
+				BadAccess => BAD_ACCESS,
+				BadAlloc => BAD_ALLOC,
+				BadAttribute => BAD_ATTRIBUTE,
+				BadContext => BAD_CONTEXT,
+				BadConfig => BAD_CONFIG,
+				BadCurrentSurface => BAD_CURRENT_SURFACE,
+				BadDisplay => BAD_DISPLAY,
+				BadSurface => BAD_SURFACE,
+				BadMatch => BAD_MATCH,
+				BadParameter => BAD_PARAMETER,
+				BadNativePixmap => BAD_NATIVE_PIXMAP,
+				BadNativeWindow => BAD_NATIVE_WINDOW,
+				ContextLost => CONTEXT_LOST,
+			}
+		}
+
+		fn message(&self) -> &'static str {
+			use Error::*;
+			match self {
+				NotInitialized => "EGL is not initialized, or could not be initialized, for the specified EGL display connection.",
+				BadAccess => "EGL cannot access a requested resource (for example a context is bound in another thread.",
+				BadAlloc => "EGL failed to allocate resources for the requested operation.",
+				BadAttribute => "An unrecognized attribute or attribute value was passed in the attribute list.",
+				BadContext => "An Context argument does not name a valid EGL rendering context.",
+				BadConfig => "An Config argument does not name a valid EGL frame buffer configuration.",
+				BadCurrentSurface => "The current surface of the calling thread is a window, pixel buffer or pixmap that is no longer valid.",
+				BadDisplay => "An Display argument does not name a valid EGL display connection.",
+				BadSurface => "An Surface argument does not name a valid surface (window, pixel buffer or pixmap) configured for GL rendering.",
+				BadMatch => "Arguments are inconsistent (for example, a valid context requires buffers not supplied by a valid surface.",
+				BadParameter => "One or more argument values are invalid.",
+				BadNativePixmap => "A NativePixmapType argument does not refer to a valid native pixmap.",
+				BadNativeWindow => "A NativeWindowType argument does not refer to a valid native window.",
+				ContextLost => "A power management event has occurred. The application must destroy all contexts and reinitialise OpenGL ES state and objects to continue rendering."
+			}
+		}
+	}
+
+	impl From<Error> for Int {
+		fn from(e: Error) -> Int {
+			e.native()
+		}
+	}
+
+	impl TryFrom<Int> for Error {
+		type Error = Int;
+
+		fn try_from(e: Int) -> Result<Error, Int> {
+			use Error::*;
+			match e {
+				NOT_INITIALIZED => Ok(NotInitialized),
+				BAD_ACCESS => Ok(BadAccess),
+				BAD_ALLOC => Ok(BadAlloc),
+				BAD_ATTRIBUTE => Ok(BadAttribute),
+				BAD_CONTEXT => Ok(BadContext),
+				BAD_CONFIG => Ok(BadConfig),
+				BAD_CURRENT_SURFACE => Ok(BadCurrentSurface),
+				BAD_DISPLAY => Ok(BadDisplay),
+				BAD_SURFACE => Ok(BadSurface),
+				BAD_MATCH => Ok(BadMatch),
+				BAD_PARAMETER => Ok(BadParameter),
+				BAD_NATIVE_PIXMAP => Ok(BadNativePixmap),
+				BAD_NATIVE_WINDOW => Ok(BadNativeWindow),
+				CONTEXT_LOST => Ok(ContextLost),
+				_ => Err(e),
+			}
+		}
+	}
+
+	impl fmt::Display for Error {
+		fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+			self.message().fmt(f)
+		}
+	}
+
+	pub fn check_int_list(attrib_list: &[Int]) -> Result<(), Error> {
+		if attrib_list.last() == Some(&NONE) {
+			Ok(())
+		} else {
+			Err(Error::BadParameter)
+		}
+	}
+
+	pub fn check_attrib_list(attrib_list: &[Attrib]) -> Result<(), Error> {
+		if attrib_list.last() == Some(&ATTRIB_NONE) {
+			Ok(())
+		} else {
+			Err(Error::BadParameter)
+		}
+	}
+
+	impl<T: api::EGL1_0> Instance<T> {
+		/// Return the number of EGL frame buffer configurations that atch specified
+		/// attributes.
+		///
+		/// This will call `eglChooseConfig` without `null` as `configs` to get the
+		/// number of matching configurations.
+		///
+		/// This will return a `BadParameter` error if `attrib_list` is not a valid
+		/// attributes list (if it does not terminate with `NONE`).
+		pub fn matching_config_count(
+			&self,
+			display: Display,
+			attrib_list: &[Int],
+		) -> Result<usize, Error> {
+			check_int_list(attrib_list)?;
+			unsafe {
+				let mut count = 0;
+
+				if self.api.eglChooseConfig(
+					display.as_ptr(),
+					attrib_list.as_ptr(),
+					ptr::null_mut(),
+					0,
+					&mut count,
+				) == TRUE
+				{
+					Ok(count as usize)
+				} else {
+					Err(self.get_error().unwrap())
+				}
+			}
+		}
+
+		/// Return a list of EGL frame buffer configurations that match specified
+		/// attributes.
+		///
+		/// This will write as many matching configurations in `configs` up to its
+		/// capacity. You can use the function [`matching_config_count`](Self::matching_config_count) to get the
+		/// exact number of configurations matching the specified attributes.
+		///
+		/// ## Example
+		///
+		/// ```
+		/// # extern crate khronos_egl as egl;
+		/// # extern crate wayland_client;
+		/// # fn main() -> Result<(), egl::Error> {
+		/// # let egl = egl::Instance::new(egl::Static);
+		/// # let wayland_display = wayland_client::Display::connect_to_env().expect("unable to connect to the wayland server");
+		/// # let display = unsafe { egl.get_display(wayland_display.get_display_ptr() as *mut std::ffi::c_void) }.unwrap();
+		/// # egl.initialize(display)?;
+		/// # let attrib_list = [egl::RED_SIZE, 8, egl::GREEN_SIZE, 8, egl::BLUE_SIZE, 8, egl::NONE];
+		/// // Get the number of matching configurations.
+		/// let count = egl.matching_config_count(display, &attrib_list)?;
+		///
+		/// // Get the matching configurations.
+		/// let mut configs = Vec::with_capacity(count);
+		/// egl.choose_config(display, &attrib_list, &mut configs)?;
+		/// # Ok(())
+		/// # }
+		/// ```
+		///
+		/// This will return a `BadParameter` error if `attrib_list` is not a valid
+		/// attributes list (if it does not terminate with `NONE`).
+		pub fn choose_config(
+			&self,
+			display: Display,
+			attrib_list: &[Int],
+			configs: &mut Vec<Config>,
+		) -> Result<(), Error> {
+			check_int_list(attrib_list)?;
+
+			let capacity = configs.capacity();
+			if capacity == 0 {
+				// When the input ptr is null (when capacity is 0),
+				// eglChooseConfig behaves differently and returns the number
+				// of configurations.
+				Ok(())
+			} else {
+				unsafe {
+					let mut count = 0;
+
+					if self.api.eglChooseConfig(
+						display.as_ptr(),
+						attrib_list.as_ptr(),
+						configs.as_mut_ptr() as *mut EGLConfig,
+						capacity.try_into().unwrap(),
+						&mut count,
+					) == TRUE
+					{
+						configs.set_len(count as usize);
+						Ok(())
+					} else {
+						Err(self.get_error().unwrap())
+					}
+				}
+			}
+		}
+
+		/// Return the first EGL frame buffer configuration that match specified
+		/// attributes.
+		///
+		/// This is an helper function that will call `choose_config` with a buffer of
+		/// size 1, which is equivalent to:
+		/// ```
+		/// # extern crate khronos_egl as egl;
+		/// # extern crate wayland_client;
+		/// # fn main() -> Result<(), egl::Error> {
+		/// # let egl = egl::Instance::new(egl::Static);
+		/// # let wayland_display = wayland_client::Display::connect_to_env().expect("unable to connect to the wayland server");
+		/// # let display = unsafe { egl.get_display(wayland_display.get_display_ptr() as *mut std::ffi::c_void) }.unwrap();
+		/// # egl.initialize(display)?;
+		/// # let attrib_list = [egl::RED_SIZE, 8, egl::GREEN_SIZE, 8, egl::BLUE_SIZE, 8, egl::NONE];
+		/// let mut configs = Vec::with_capacity(1);
+		/// egl.choose_config(display, &attrib_list, &mut configs)?;
+		/// configs.first();
+		/// # Ok(())
+		/// # }
+		/// ```
+		pub fn choose_first_config(
+			&self,
+			display: Display,
+			attrib_list: &[Int],
+		) -> Result<Option<Config>, Error> {
+			let mut configs = Vec::with_capacity(1);
+			self.choose_config(display, attrib_list, &mut configs)?;
+			Ok(configs.first().copied())
+		}
+
+		/// Copy EGL surface color buffer to a native pixmap.
+		///
+		/// # Safety
+		///
+		/// `target` must be a valid pointer to a native pixmap that belongs
+		/// to the same platform as `display` and `surface`.
+		pub unsafe fn copy_buffers(
+			&self,
+			display: Display,
+			surface: Surface,
+			target: NativePixmapType,
+		) -> Result<(), Error> {
+			unsafe {
+				if self
+					.api
+					.eglCopyBuffers(display.as_ptr(), surface.as_ptr(), target)
+					== TRUE
+				{
+					Ok(())
+				} else {
+					Err(self.get_error().unwrap())
+				}
+			}
+		}
+
+		/// Create a new EGL rendering context.
+		///
+		/// This will return a `BadParameter` error if `attrib_list` is not a valid
+		/// attributes list (if it does not terminate with `NONE`).
+		pub fn create_context(
+			&self,
+			display: Display,
+			config: Config,
+			share_context: Option<Context>,
+			attrib_list: &[Int],
+		) -> Result<Context, Error> {
+			check_int_list(attrib_list)?;
+			unsafe {
+				let share_context = match share_context {
+					Some(share_context) => share_context.as_ptr(),
+					None => NO_CONTEXT,
+				};
+
+				let context = self.api.eglCreateContext(
+					display.as_ptr(),
+					config.as_ptr(),
+					share_context,
+					attrib_list.as_ptr(),
+				);
+
+				if context != NO_CONTEXT {
+					Ok(Context(context))
+				} else {
+					Err(self.get_error().unwrap())
+				}
+			}
+		}
+
+		/// Create a new EGL pixel buffer surface.
+		///
+		/// This will return a `BadParameter` error if `attrib_list` is not a valid
+		/// attributes list (if it does not terminate with `NONE`).
+		pub fn create_pbuffer_surface(
+			&self,
+			display: Display,
+			config: Config,
+			attrib_list: &[Int],
+		) -> Result<Surface, Error> {
+			check_int_list(attrib_list)?;
+			unsafe {
+				let surface = self.api.eglCreatePbufferSurface(
+					display.as_ptr(),
+					config.as_ptr(),
+					attrib_list.as_ptr(),
+				);
+
+				if surface != NO_SURFACE {
+					Ok(Surface(surface))
+				} else {
+					Err(self.get_error().unwrap())
+				}
+			}
+		}
+
+		/// Create a new EGL offscreen surface.
+		///
+		/// This will return a `BadParameter` error if `attrib_list` is not a valid
+		/// attributes list (if it does not terminate with `NONE`).
+		///
+		/// # Safety
+		///
+		/// This function may raise undefined behavior if the display and native
+		/// pixmap do not belong to the same platform.
+		pub unsafe fn create_pixmap_surface(
+			&self,
+			display: Display,
+			config: Config,
+			pixmap: NativePixmapType,
+			attrib_list: &[Int],
+		) -> Result<Surface, Error> {
+			check_int_list(attrib_list)?;
+			let surface = self.api.eglCreatePixmapSurface(
+				display.as_ptr(),
+				config.as_ptr(),
+				pixmap,
+				attrib_list.as_ptr(),
+			);
+
+			if surface != NO_SURFACE {
+				Ok(Surface(surface))
+			} else {
+				Err(self.get_error().unwrap())
+			}
+		}
+
+		/// Create a new EGL window surface.
+		///
+		/// This will return a `BadParameter` error if `attrib_list` is not a valid
+		/// attributes list (if it does not terminate with `NONE`).
+		///
+		/// # Safety
+		///
+		/// This function may raise undefined behavior if the display and native
+		/// window do not belong to the same platform.
+		pub unsafe fn create_window_surface(
+			&self,
+			display: Display,
+			config: Config,
+			window: NativeWindowType,
+			attrib_list: Option<&[Int]>,
+		) -> Result<Surface, Error> {
+			let attrib_list = match attrib_list {
+				Some(attrib_list) => {
+					check_int_list(attrib_list)?;
+					attrib_list.as_ptr()
+				}
+				None => ptr::null(),
+			};
+
+			let surface = self.api.eglCreateWindowSurface(
+				display.as_ptr(),
+				config.as_ptr(),
+				window,
+				attrib_list,
+			);
+
+			if surface != NO_SURFACE {
+				Ok(Surface(surface))
+			} else {
+				Err(self.get_error().unwrap())
+			}
+		}
+
+		/// Destroy an EGL rendering context.
+		pub fn destroy_context(&self, display: Display, ctx: Context) -> Result<(), Error> {
+			unsafe {
+				if self.api.eglDestroyContext(display.as_ptr(), ctx.as_ptr()) == TRUE {
+					Ok(())
+				} else {
+					Err(self.get_error().unwrap())
+				}
+			}
+		}
+
+		/// Destroy an EGL surface.
+		pub fn destroy_surface(&self, display: Display, surface: Surface) -> Result<(), Error> {
+			unsafe {
+				if self
+					.api
+					.eglDestroySurface(display.as_ptr(), surface.as_ptr())
+					== TRUE
+				{
+					Ok(())
+				} else {
+					Err(self.get_error().unwrap())
+				}
+			}
+		}
+
+		/// Return information about an EGL frame buffer configuration.
+		pub fn get_config_attrib(
+			&self,
+			display: Display,
+			config: Config,
+			attribute: Int,
+		) -> Result<Int, Error> {
+			unsafe {
+				let mut value: Int = 0;
+				if self.api.eglGetConfigAttrib(
+					display.as_ptr(),
+					config.as_ptr(),
+					attribute,
+					&mut value,
+				) == TRUE
+				{
+					Ok(value)
+				} else {
+					Err(self.get_error().unwrap())
+				}
+			}
+		}
+
+		/// Return the number of all frame buffer configurations.
+		///
+		/// You can use it to setup the correct capacity for the configurations buffer in [`get_configs`](Self::get_configs).
+		///
+		/// ## Example
+		/// ```
+		/// # extern crate khronos_egl as egl;
+		/// # extern crate wayland_client;
+		/// # fn main() -> Result<(), egl::Error> {
+		/// # let egl = egl::Instance::new(egl::Static);
+		/// # let wayland_display = wayland_client::Display::connect_to_env().expect("unable to connect to the wayland server");
+		/// # let display = unsafe { egl.get_display(wayland_display.get_display_ptr() as *mut std::ffi::c_void) }.unwrap();
+		/// # egl.initialize(display)?;
+		/// let mut configs = Vec::with_capacity(egl.get_config_count(display)?);
+		/// egl.get_configs(display, &mut configs);
+		/// assert!(configs.len() > 0);
+		/// # Ok(())
+		/// # }
+		/// ```
+		pub fn get_config_count(&self, display: Display) -> Result<usize, Error> {
+			unsafe {
+				let mut count = 0;
+
+				if self
+					.api
+					.eglGetConfigs(display.as_ptr(), std::ptr::null_mut(), 0, &mut count)
+					== TRUE
+				{
+					Ok(count as usize)
+				} else {
+					Err(self.get_error().unwrap())
+				}
+			}
+		}
+
+		/// Get the list of all EGL frame buffer configurations for a display.
+		///
+		/// The configurations are added to the `configs` buffer, up to the buffer's capacity.
+		/// You can use [`get_config_count`](Self::get_config_count) to get the total number of available frame buffer configurations,
+		/// and setup the buffer's capacity accordingly.
+		///
+		/// ## Example
+		/// ```
+		/// # extern crate khronos_egl as egl;
+		/// # extern crate wayland_client;
+		/// # fn main() -> Result<(), egl::Error> {
+		/// # let egl = egl::Instance::new(egl::Static);
+		/// # let wayland_display = wayland_client::Display::connect_to_env().expect("unable to connect to the wayland server");
+		/// # let display = unsafe { egl.get_display(wayland_display.get_display_ptr() as *mut std::ffi::c_void) }.unwrap();
+		/// # egl.initialize(display)?;
+		/// let mut configs = Vec::with_capacity(egl.get_config_count(display)?);
+		/// egl.get_configs(display, &mut configs);
+		/// # Ok(())
+		/// # }
+		/// ```
+		pub fn get_configs(
+			&self,
+			display: Display,
+			configs: &mut Vec<Config>,
+		) -> Result<(), Error> {
+			let capacity = configs.capacity();
+			if capacity == 0 {
+				// When the input ptr is null (when capacity is 0),
+				// eglGetConfig behaves differently and returns the number
+				// of configurations.
+				Ok(())
+			} else {
+				unsafe {
+					let mut count = 0;
+
+					if self.api.eglGetConfigs(
+						display.as_ptr(),
+						configs.as_mut_ptr() as *mut EGLConfig,
+						capacity.try_into().unwrap(),
+						&mut count,
+					) == TRUE
+					{
+						configs.set_len(count as usize);
+						Ok(())
+					} else {
+						Err(self.get_error().unwrap())
+					}
+				}
+			}
+		}
+
+		/// Return the display for the current EGL rendering context.
+		pub fn get_current_display(&self) -> Option<Display> {
+			unsafe {
+				let display = self.api.eglGetCurrentDisplay();
+
+				if display != NO_DISPLAY {
+					Some(Display(display))
+				} else {
+					None
+				}
+			}
+		}
+
+		/// Return the read or draw surface for the current EGL rendering context.
+		pub fn get_current_surface(&self, readdraw: Int) -> Option<Surface> {
+			unsafe {
+				let surface = self.api.eglGetCurrentSurface(readdraw);
+
+				if surface != NO_SURFACE {
+					Some(Surface(surface))
+				} else {
+					None
+				}
+			}
+		}
+
+		/// Return an EGL display connection.
+		///
+		/// # Safety
+		///
+		/// The `native_display` must be a valid pointer to the native display.
+		/// Valid values for platform are defined by EGL extensions, as are
+		/// requirements for native_display. For example, an extension
+		/// specification that defines support for the X11 platform may require
+		/// that native_display be a pointer to an X11 Display, and an extension
+		/// specification that defines support for the Microsoft Windows
+		/// platform may require that native_display be a pointer to a Windows
+		/// Device Context.
+		pub unsafe fn get_display(&self, display_id: NativeDisplayType) -> Option<Display> {
+			let display = self.api.eglGetDisplay(display_id);
+
+			if display != NO_DISPLAY {
+				Some(Display(display))
+			} else {
+				None
+			}
+		}
+
+		/// Return error information.
+		///
+		/// Return the error of the last called EGL function in the current thread, or
+		/// `None` if the error is set to `SUCCESS`.
+		///
+		/// Note that since a call to `eglGetError` sets the error to `SUCCESS`, and
+		/// since this function is automatically called by any wrapper function
+		/// returning a `Result` when necessary, this function may only return `None`
+		/// from the point of view of a user.
+		pub fn get_error(&self) -> Option<Error> {
+			unsafe {
+				let e = self.api.eglGetError();
+				if e == SUCCESS {
+					None
+				} else {
+					Some(e.try_into().unwrap())
+				}
+			}
+		}
+
+		/// Return a GL or an EGL extension function.
+		pub fn get_proc_address(&self, procname: &str) -> Option<extern "system" fn()> {
+			unsafe {
+				let string = CString::new(procname).unwrap();
+
+				let addr = self.api.eglGetProcAddress(string.as_ptr());
+				if !(addr as *const ()).is_null() {
+					Some(addr)
+				} else {
+					None
+				}
+			}
+		}
+
+		/// Initialize an EGL display connection.
+		pub fn initialize(&self, display: Display) -> Result<(Int, Int), Error> {
+			unsafe {
+				let mut major = 0;
+				let mut minor = 0;
+
+				if self
+					.api
+					.eglInitialize(display.as_ptr(), &mut major, &mut minor)
+					== TRUE
+				{
+					Ok((major, minor))
+				} else {
+					Err(self.get_error().unwrap())
+				}
+			}
+		}
+
+		/// Attach an EGL rendering context to EGL surfaces.
+		pub fn make_current(
+			&self,
+			display: Display,
+			draw: Option<Surface>,
+			read: Option<Surface>,
+			ctx: Option<Context>,
+		) -> Result<(), Error> {
+			unsafe {
+				let draw = match draw {
+					Some(draw) => draw.as_ptr(),
+					None => NO_SURFACE,
+				};
+				let read = match read {
+					Some(read) => read.as_ptr(),
+					None => NO_SURFACE,
+				};
+				let ctx = match ctx {
+					Some(ctx) => ctx.as_ptr(),
+					None => NO_CONTEXT,
+				};
+
+				if self.api.eglMakeCurrent(display.as_ptr(), draw, read, ctx) == TRUE {
+					Ok(())
+				} else {
+					Err(self.get_error().unwrap())
+				}
+			}
+		}
+
+		/// Return EGL rendering context information.
+		pub fn query_context(
+			&self,
+			display: Display,
+			ctx: Context,
+			attribute: Int,
+		) -> Result<Int, Error> {
+			unsafe {
+				let mut value = 0;
+				if self
+					.api
+					.eglQueryContext(display.as_ptr(), ctx.as_ptr(), attribute, &mut value)
+					== TRUE
+				{
+					Ok(value)
+				} else {
+					Err(self.get_error().unwrap())
+				}
+			}
+		}
+
+		/// Return a string describing properties of the EGL client or of an EGL display
+		/// connection.
+		pub fn query_string(
+			&self,
+			display: Option<Display>,
+			name: Int,
+		) -> Result<&'static CStr, Error> {
+			unsafe {
+				let display_ptr = match display {
+					Some(display) => display.as_ptr(),
+					None => NO_DISPLAY,
+				};
+
+				let c_str = self.api.eglQueryString(display_ptr, name);
+
+				if !c_str.is_null() {
+					Ok(CStr::from_ptr(c_str))
+				} else {
+					Err(self.get_error().unwrap())
+				}
+			}
+		}
+
+		/// Return EGL surface information.
+		pub fn query_surface(
+			&self,
+			display: Display,
+			surface: Surface,
+			attribute: Int,
+		) -> Result<Int, Error> {
+			unsafe {
+				let mut value = 0;
+				if self.api.eglQuerySurface(
+					display.as_ptr(),
+					surface.as_ptr(),
+					attribute,
+					&mut value,
+				) == TRUE
+				{
+					Ok(value)
+				} else {
+					Err(self.get_error().unwrap())
+				}
+			}
+		}
+
+		/// Post EGL surface color buffer to a native window.
+		pub fn swap_buffers(&self, display: Display, surface: Surface) -> Result<(), Error> {
+			unsafe {
+				if self.api.eglSwapBuffers(display.as_ptr(), surface.as_ptr()) == TRUE {
+					Ok(())
+				} else {
+					Err(self.get_error().unwrap())
+				}
+			}
+		}
+
+		/// Terminate an EGL display connection.
+		pub fn terminate(&self, display: Display) -> Result<(), Error> {
+			unsafe {
+				if self.api.eglTerminate(display.as_ptr()) == TRUE {
+					Ok(())
+				} else {
+					Err(self.get_error().unwrap())
+				}
+			}
+		}
+
+		/// Complete GL execution prior to subsequent native rendering calls.
+		pub fn wait_gl(&self) -> Result<(), Error> {
+			unsafe {
+				if self.api.eglWaitGL() == TRUE {
+					Ok(())
+				} else {
+					Err(self.get_error().unwrap())
+				}
+			}
+		}
+
+		/// Complete native execution prior to subsequent GL rendering calls.
+		pub fn wait_native(&self, engine: Int) -> Result<(), Error> {
+			unsafe {
+				if self.api.eglWaitNative(engine) == TRUE {
+					Ok(())
+				} else {
+					Err(self.get_error().unwrap())
+				}
+			}
+		}
+	}
+}
+
+#[cfg(feature = "1_0")]
+pub use egl1_0::*;
+
+// ------------------------------------------------------------------------------------------------
+// EGL 1.1
+// ------------------------------------------------------------------------------------------------
+
+#[cfg(feature = "1_1")]
+mod egl1_1 {
+	use super::*;
+
+	pub const BACK_BUFFER: Int = 0x3084;
+	pub const BIND_TO_TEXTURE_RGB: Int = 0x3039;
+	pub const BIND_TO_TEXTURE_RGBA: Int = 0x303A;
+	pub const CONTEXT_LOST: Int = 0x300E;
+	pub const MIN_SWAP_INTERVAL: Int = 0x303B;
+	pub const MAX_SWAP_INTERVAL: Int = 0x303C;
+	pub const MIPMAP_TEXTURE: Int = 0x3082;
+	pub const MIPMAP_LEVEL: Int = 0x3083;
+	pub const NO_TEXTURE: Int = 0x305C;
+	pub const TEXTURE_2D: Int = 0x305F;
+	pub const TEXTURE_FORMAT: Int = 0x3080;
+	pub const TEXTURE_RGB: Int = 0x305D;
+	pub const TEXTURE_RGBA: Int = 0x305E;
+	pub const TEXTURE_TARGET: Int = 0x3081;
+
+	impl<T: api::EGL1_1> Instance<T> {
+		/// Defines a two-dimensional texture image.
+		pub fn bind_tex_image(
+			&self,
+			display: Display,
+			surface: Surface,
+			buffer: Int,
+		) -> Result<(), Error> {
+			unsafe {
+				if self
+					.api
+					.eglBindTexImage(display.as_ptr(), surface.as_ptr(), buffer)
+					== TRUE
+				{
+					Ok(())
+				} else {
+					Err(self.get_error().unwrap())
+				}
+			}
+		}
+
+		///  Releases a color buffer that is being used as a texture.
+		pub fn release_tex_image(
+			&self,
+			display: Display,
+			surface: Surface,
+			buffer: Int,
+		) -> Result<(), Error> {
+			unsafe {
+				if self
+					.api
+					.eglReleaseTexImage(display.as_ptr(), surface.as_ptr(), buffer)
+					== TRUE
+				{
+					Ok(())
+				} else {
+					Err(self.get_error().unwrap())
+				}
+			}
+		}
+
+		/// Set an EGL surface attribute.
+		pub fn surface_attrib(
+			&self,
+			display: Display,
+			surface: Surface,
+			attribute: Int,
+			value: Int,
+		) -> Result<(), Error> {
+			unsafe {
+				if self
+					.api
+					.eglSurfaceAttrib(display.as_ptr(), surface.as_ptr(), attribute, value)
+					== TRUE
+				{
+					Ok(())
+				} else {
+					Err(self.get_error().unwrap())
+				}
+			}
+		}
+
+		/// Specifies the minimum number of video frame periods per buffer swap for the
+		/// window associated with the current context.
+		pub fn swap_interval(&self, display: Display, interval: Int) -> Result<(), Error> {
+			unsafe {
+				if self.api.eglSwapInterval(display.as_ptr(), interval) == TRUE {
+					Ok(())
+				} else {
+					Err(self.get_error().unwrap())
+				}
+			}
+		}
+	}
+}
+
+#[cfg(feature = "1_1")]
+pub use egl1_1::*;
+
+// ------------------------------------------------------------------------------------------------
+// EGL 1.2
+// ------------------------------------------------------------------------------------------------
+
+#[cfg(feature = "1_2")]
+mod egl1_2 {
+	use super::*;
+
+	pub type Enum = c_uint;
+	pub type EGLClientBuffer = *mut c_void;
+
+	#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+	pub struct ClientBuffer(EGLClientBuffer);
+
+	impl ClientBuffer {
+		/// Creates a new client buffer form its EGL pointer.
+		///
+		/// # Safety
+		///
+		/// `ptr` must be a valid `EGLClientBuffer` pointer.
+		#[inline]
+		pub unsafe fn from_ptr(ptr: EGLClientBuffer) -> ClientBuffer {
+			ClientBuffer(ptr)
+		}
+
+		#[inline]
+		pub fn as_ptr(&self) -> EGLClientBuffer {
+			self.0
+		}
+	}
+
+	pub const ALPHA_FORMAT: Int = 0x3088;
+	pub const ALPHA_FORMAT_NONPRE: Int = 0x308B;
+	pub const ALPHA_FORMAT_PRE: Int = 0x308C;
+	pub const ALPHA_MASK_SIZE: Int = 0x303E;
+	pub const BUFFER_PRESERVED: Int = 0x3094;
+	pub const BUFFER_DESTROYED: Int = 0x3095;
+	pub const CLIENT_APIS: Int = 0x308D;
+	pub const COLORSPACE: Int = 0x3087;
+	pub const COLORSPACE_sRGB: Int = 0x3089;
+	pub const COLORSPACE_LINEAR: Int = 0x308A;
+	pub const COLOR_BUFFER_TYPE: Int = 0x303F;
+	pub const CONTEXT_CLIENT_TYPE: Int = 0x3097;
+	pub const DISPLAY_SCALING: Int = 10000;
+	pub const HORIZONTAL_RESOLUTION: Int = 0x3090;
+	pub const LUMINANCE_BUFFER: Int = 0x308F;
+	pub const LUMINANCE_SIZE: Int = 0x303D;
+	pub const OPENGL_ES_BIT: Int = 0x0001;
+	pub const OPENVG_BIT: Int = 0x0002;
+	pub const OPENGL_ES_API: Enum = 0x30A0;
+	pub const OPENVG_API: Enum = 0x30A1;
+	pub const OPENVG_IMAGE: Int = 0x3096;
+	pub const PIXEL_ASPECT_RATIO: Int = 0x3092;
+	pub const RENDERABLE_TYPE: Int = 0x3040;
+	pub const RENDER_BUFFER: Int = 0x3086;
+	pub const RGB_BUFFER: Int = 0x308E;
+	pub const SINGLE_BUFFER: Int = 0x3085;
+	pub const SWAP_BEHAVIOR: Int = 0x3093;
+	pub const UNKNOWN: Int = -1;
+	pub const VERTICAL_RESOLUTION: Int = 0x3091;
+
+	impl<T: api::EGL1_2> Instance<T> {
+		/// Set the current rendering API.
+		pub fn bind_api(&self, api: Enum) -> Result<(), Error> {
+			unsafe {
+				if self.api.eglBindAPI(api) == TRUE {
+					Ok(())
+				} else {
+					Err(self.get_error().unwrap())
+				}
+			}
+		}
+
+		/// Query the current rendering API.
+		pub fn query_api(&self) -> Enum {
+			unsafe { self.api.eglQueryAPI() }
+		}
+
+		/// Create a new EGL pixel buffer surface bound to an OpenVG image.
+		///
+		/// This will return a `BadParameter` error if `attrib_list` is not a valid
+		/// attributes list (if it does not terminate with `NONE`).
+		pub fn create_pbuffer_from_client_buffer(
+			&self,
+			display: Display,
+			buffer_type: Enum,
+			buffer: ClientBuffer,
+			config: Config,
+			attrib_list: &[Int],
+		) -> Result<Surface, Error> {
+			check_int_list(attrib_list)?;
+			unsafe {
+				let surface = self.api.eglCreatePbufferFromClientBuffer(
+					display.as_ptr(),
+					buffer_type,
+					buffer.as_ptr(),
+					config.as_ptr(),
+					attrib_list.as_ptr(),
+				);
+
+				if surface != NO_SURFACE {
+					Ok(Surface::from_ptr(surface))
+				} else {
+					Err(self.get_error().unwrap())
+				}
+			}
+		}
+
+		/// Release EGL per-thread state.
+		pub fn release_thread(&self) -> Result<(), Error> {
+			unsafe {
+				if self.api.eglReleaseThread() == TRUE {
+					Ok(())
+				} else {
+					Err(self.get_error().unwrap())
+				}
+			}
+		}
+
+		/// Complete client API execution prior to subsequent native rendering calls.
+		pub fn wait_client(&self) -> Result<(), Error> {
+			unsafe {
+				if self.api.eglWaitClient() == TRUE {
+					Ok(())
+				} else {
+					Err(self.get_error().unwrap())
+				}
+			}
+		}
+	}
+}
+
+#[cfg(feature = "1_2")]
+pub use egl1_2::*;
+
+// ------------------------------------------------------------------------------------------------
+// EGL 1.3
+// ------------------------------------------------------------------------------------------------
+
+#[cfg(feature = "1_3")]
+mod egl1_3 {
+	use super::*;
+
+	pub const CONFORMANT: Int = 0x3042;
+	pub const CONTEXT_CLIENT_VERSION: Int = 0x3098;
+	pub const MATCH_NATIVE_PIXMAP: Int = 0x3041;
+	pub const OPENGL_ES2_BIT: Int = 0x0004;
+	pub const VG_ALPHA_FORMAT: Int = 0x3088;
+	pub const VG_ALPHA_FORMAT_NONPRE: Int = 0x308B;
+	pub const VG_ALPHA_FORMAT_PRE: Int = 0x308C;
+	pub const VG_ALPHA_FORMAT_PRE_BIT: Int = 0x0040;
+	pub const VG_COLORSPACE: Int = 0x3087;
+	pub const VG_COLORSPACE_sRGB: Int = 0x3089;
+	pub const VG_COLORSPACE_LINEAR: Int = 0x308A;
+	pub const VG_COLORSPACE_LINEAR_BIT: Int = 0x0020;
+}
+
+#[cfg(feature = "1_3")]
+pub use egl1_3::*;
+
+// ------------------------------------------------------------------------------------------------
+// EGL 1.4
+// ------------------------------------------------------------------------------------------------
+
+#[cfg(feature = "1_4")]
+mod egl1_4 {
+	use super::*;
+
+	pub const DEFAULT_DISPLAY: NativeDisplayType = 0 as NativeDisplayType;
+	pub const MULTISAMPLE_RESOLVE_BOX_BIT: Int = 0x0200;
+	pub const MULTISAMPLE_RESOLVE: Int = 0x3099;
+	pub const MULTISAMPLE_RESOLVE_DEFAULT: Int = 0x309A;
+	pub const MULTISAMPLE_RESOLVE_BOX: Int = 0x309B;
+	pub const OPENGL_API: Enum = 0x30A2;
+	pub const OPENGL_BIT: Int = 0x0008;
+	pub const SWAP_BEHAVIOR_PRESERVED_BIT: Int = 0x0400;
+
+	impl<T: api::EGL1_4> Instance<T> {
+		/// Return the current EGL rendering context.
+		pub fn get_current_context(&self) -> Option<Context> {
+			unsafe {
+				let context = self.api.eglGetCurrentContext();
+
+				if context != NO_CONTEXT {
+					Some(Context(context))
+				} else {
+					None
+				}
+			}
+		}
+	}
+}
+
+#[cfg(feature = "1_4")]
+pub use egl1_4::*;
+
+// ------------------------------------------------------------------------------------------------
+// EGL 1.5
+// ------------------------------------------------------------------------------------------------
+
+#[cfg(feature = "1_5")]
+mod egl1_5 {
+	use super::*;
+
+	pub type Time = u64;
+	pub type EGLSync = *mut c_void;
+	pub type EGLImage = *mut c_void;
+
+	#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+	pub struct Sync(EGLSync);
+
+	impl Sync {
+		/// Creates a new sync form its EGL pointer.
+		///
+		/// # Safety
+		///
+		/// `ptr` must be a valid `EGLSync` pointer.
+		#[inline]
+		pub unsafe fn from_ptr(ptr: EGLSync) -> Sync {
+			Sync(ptr)
+		}
+
+		#[inline]
+		pub fn as_ptr(&self) -> EGLSync {
+			self.0
+		}
+	}
+
+	#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
+	pub struct Image(EGLImage);
+
+	impl Image {
+		/// Creates a new image form its EGL pointer.
+		///
+		/// # Safety
+		///
+		/// `ptr` must be a valid `EGLImage` pointer.
+		#[inline]
+		pub unsafe fn from_ptr(ptr: EGLImage) -> Image {
+			Image(ptr)
+		}
+
+		#[inline]
+		pub fn as_ptr(&self) -> EGLImage {
+			self.0
+		}
+	}
+
+	pub const CONTEXT_MAJOR_VERSION: Int = 0x3098;
+	pub const CONTEXT_MINOR_VERSION: Int = 0x30FB;
+	pub const CONTEXT_OPENGL_PROFILE_MASK: Int = 0x30FD;
+	pub const CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY: Int = 0x31BD;
+	pub const NO_RESET_NOTIFICATION: Int = 0x31BE;
+	pub const LOSE_CONTEXT_ON_RESET: Int = 0x31BF;
+	pub const CONTEXT_OPENGL_CORE_PROFILE_BIT: Int = 0x00000001;
+	pub const CONTEXT_OPENGL_COMPATIBILITY_PROFILE_BIT: Int = 0x00000002;
+	pub const CONTEXT_OPENGL_DEBUG: Int = 0x31B0;
+	pub const CONTEXT_OPENGL_FORWARD_COMPATIBLE: Int = 0x31B1;
+	pub const CONTEXT_OPENGL_ROBUST_ACCESS: Int = 0x31B2;
+	pub const OPENGL_ES3_BIT: Int = 0x00000040;
+	pub const CL_EVENT_HANDLE: Int = 0x309C;
+	pub const SYNC_CL_EVENT: Int = 0x30FE;
+	pub const SYNC_CL_EVENT_COMPLETE: Int = 0x30FF;
+	pub const SYNC_PRIOR_COMMANDS_COMPLETE: Int = 0x30F0;
+	pub const SYNC_TYPE: Int = 0x30F7;
+	pub const SYNC_STATUS: Int = 0x30F1;
+	pub const SYNC_CONDITION: Int = 0x30F8;
+	pub const SIGNALED: Int = 0x30F2;
+	pub const UNSIGNALED: Int = 0x30F3;
+	pub const SYNC_FLUSH_COMMANDS_BIT: Int = 0x0001;
+	pub const FOREVER: u64 = 0xFFFFFFFFFFFFFFFFu64;
+	pub const TIMEOUT_EXPIRED: Int = 0x30F5;
+	pub const CONDITION_SATISFIED: Int = 0x30F6;
+	pub const NO_SYNC: EGLSync = 0 as EGLSync;
+	pub const SYNC_FENCE: Int = 0x30F9;
+	pub const GL_COLORSPACE: Int = 0x309D;
+	pub const GL_COLORSPACE_SRGB: Int = 0x3089;
+	pub const GL_COLORSPACE_LINEAR: Int = 0x308A;
+	pub const GL_RENDERBUFFER: Int = 0x30B9;
+	pub const GL_TEXTURE_2D: Int = 0x30B1;
+	pub const GL_TEXTURE_LEVEL: Int = 0x30BC;
+	pub const GL_TEXTURE_3D: Int = 0x30B2;
+	pub const GL_TEXTURE_ZOFFSET: Int = 0x30BD;
+	pub const GL_TEXTURE_CUBE_MAP_POSITIVE_X: Int = 0x30B3;
+	pub const GL_TEXTURE_CUBE_MAP_NEGATIVE_X: Int = 0x30B4;
+	pub const GL_TEXTURE_CUBE_MAP_POSITIVE_Y: Int = 0x30B5;
+	pub const GL_TEXTURE_CUBE_MAP_NEGATIVE_Y: Int = 0x30B6;
+	pub const GL_TEXTURE_CUBE_MAP_POSITIVE_Z: Int = 0x30B7;
+	pub const GL_TEXTURE_CUBE_MAP_NEGATIVE_Z: Int = 0x30B8;
+	pub const IMAGE_PRESERVED: Int = 0x30D2;
+	pub const NO_IMAGE: EGLImage = 0 as EGLImage;
+
+	impl<T: api::EGL1_5> Instance<T> {
+		/// Create a new EGL sync object.
+		///
+		/// Note that the constant `ATTRIB_NONE` which has the type `Attrib` can be used
+		/// instead of `NONE` to terminate the attribute list.
+		///
+		/// This will return a `BadParameter` error if `attrib_list` is not a valid
+		/// attributes list (if it does not terminate with `ATTRIB_NONE`).
+		///
+		/// # Safety
+		///
+		/// When creating an OpenCL Event Sync Object, passing an invalid event
+		/// handle in `attrib_list` may result in undefined behavior up to and including program
+		/// termination.
+		pub unsafe fn create_sync(
+			&self,
+			display: Display,
+			ty: Enum,
+			attrib_list: &[Attrib],
+		) -> Result<Sync, Error> {
+			check_attrib_list(attrib_list)?;
+			let sync = self
+				.api
+				.eglCreateSync(display.as_ptr(), ty, attrib_list.as_ptr());
+			if sync != NO_SYNC {
+				Ok(Sync(sync))
+			} else {
+				Err(self.get_error().unwrap())
+			}
+		}
+
+		/// Destroy a sync object.
+		///
+		/// # Safety
+		///
+		/// If display does not match the display passed to eglCreateSync when
+		/// sync was created, the behaviour is undefined.
+		pub unsafe fn destroy_sync(&self, display: Display, sync: Sync) -> Result<(), Error> {
+			if self.api.eglDestroySync(display.as_ptr(), sync.as_ptr()) == TRUE {
+				Ok(())
+			} else {
+				Err(self.get_error().unwrap())
+			}
+		}
+
+		/// Wait in the client for a sync object to be signalled.
+		///
+		/// # Safety
+		///
+		/// If `display` does not match the [`Display`] passed to [`create_sync`](Self::create_sync)
+		/// when `sync` was created, the behaviour is undefined.
+		pub unsafe fn client_wait_sync(
+			&self,
+			display: Display,
+			sync: Sync,
+			flags: Int,
+			timeout: Time,
+		) -> Result<Int, Error> {
+			let status =
+				self.api
+					.eglClientWaitSync(display.as_ptr(), sync.as_ptr(), flags, timeout);
+			if status != FALSE as Int {
+				Ok(status)
+			} else {
+				Err(self.get_error().unwrap())
+			}
+		}
+
+		/// Return an attribute of a sync object.
+		///
+		/// # Safety
+		///
+		/// If `display` does not match the [`Display`] passed to [`create_sync`](Self::create_sync)
+		/// when `sync` was created, behavior is undefined.
+		pub unsafe fn get_sync_attrib(
+			&self,
+			display: Display,
+			sync: Sync,
+			attribute: Int,
+		) -> Result<Attrib, Error> {
+			let mut value = 0;
+			if self.api.eglGetSyncAttrib(
+				display.as_ptr(),
+				sync.as_ptr(),
+				attribute,
+				&mut value as *mut Attrib,
+			) == TRUE
+			{
+				Ok(value)
+			} else {
+				Err(self.get_error().unwrap())
+			}
+		}
+
+		/// Create a new Image object.
+		///
+		/// Note that the constant `ATTRIB_NONE` which has the type `Attrib` can be used
+		/// instead of `NONE` to terminate the attribute list.
+		///
+		/// This will return a `BadParameter` error if `attrib_list` is not a valid
+		/// attributes list (if it does not terminate with `ATTRIB_NONE`).
+		pub fn create_image(
+			&self,
+			display: Display,
+			ctx: Context,
+			target: Enum,
+			buffer: ClientBuffer,
+			attrib_list: &[Attrib],
+		) -> Result<Image, Error> {
+			check_attrib_list(attrib_list)?;
+			unsafe {
+				let image = self.api.eglCreateImage(
+					display.as_ptr(),
+					ctx.as_ptr(),
+					target,
+					buffer.as_ptr(),
+					attrib_list.as_ptr(),
+				);
+				if image != NO_IMAGE {
+					Ok(Image(image))
+				} else {
+					Err(self.get_error().unwrap())
+				}
+			}
+		}
+
+		/// Destroy an Image object.
+		pub fn destroy_image(&self, display: Display, image: Image) -> Result<(), Error> {
+			unsafe {
+				if self.api.eglDestroyImage(display.as_ptr(), image.as_ptr()) == TRUE {
+					Ok(())
+				} else {
+					Err(self.get_error().unwrap())
+				}
+			}
+		}
+
+		/// Return an EGL display connection.
+		///
+		/// Note that the constant `ATTRIB_NONE` which has the type `Attrib` can be used
+		/// instead of `NONE` to terminate the attribute list.
+		///
+		/// This will return a `BadParameter` error if `attrib_list` is not a valid
+		/// attributes list (if it does not terminate with `ATTRIB_NONE`).
+		///
+		/// # Safety
+		///
+		/// The `native_display` must be a valid pointer to the native display.
+		/// Valid values for platform are defined by EGL extensions, as are
+		/// requirements for native_display. For example, an extension
+		/// specification that defines support for the X11 platform may require
+		/// that native_display be a pointer to an X11 Display, and an extension
+		/// specification that defines support for the Microsoft Windows
+		/// platform may require that native_display be a pointer to a Windows
+		/// Device Context.
+		pub unsafe fn get_platform_display(
+			&self,
+			platform: Enum,
+			native_display: NativeDisplayType,
+			attrib_list: &[Attrib],
+		) -> Result<Display, Error> {
+			check_attrib_list(attrib_list)?;
+
+			let display =
+				self.api
+					.eglGetPlatformDisplay(platform, native_display, attrib_list.as_ptr());
+			if display != NO_DISPLAY {
+				Ok(Display::from_ptr(display))
+			} else {
+				Err(self.get_error().unwrap())
+			}
+		}
+
+		/// Create a new EGL on-screen rendering surface.
+		///
+		/// Note that the constant `ATTRIB_NONE` which has the type `Attrib` can be used
+		/// instead of `NONE` to terminate the attribute list.
+		///
+		/// This will return a `BadParameter` error if `attrib_list` is not a valid
+		/// attributes list (if it does not terminate with `ATTRIB_NONE`).
+		///
+		/// # Safety
+		///
+		/// The `native_window` must be a valid pointer to the native window
+		/// and must belong to the same platform as `display`.
+		/// EGL considers the returned EGLSurface as belonging to that same platform.
+		/// The EGL extension that defines the platform to which display belongs
+		/// also defines the requirements for the `native_window` parameter.
+		pub unsafe fn create_platform_window_surface(
+			&self,
+			display: Display,
+			config: Config,
+			native_window: NativeWindowType,
+			attrib_list: &[Attrib],
+		) -> Result<Surface, Error> {
+			check_attrib_list(attrib_list)?;
+
+			let surface = self.api.eglCreatePlatformWindowSurface(
+				display.as_ptr(),
+				config.as_ptr(),
+				native_window,
+				attrib_list.as_ptr(),
+			);
+			if surface != NO_SURFACE {
+				Ok(Surface::from_ptr(surface))
+			} else {
+				Err(self.get_error().unwrap())
+			}
+		}
+
+		/// Create a new EGL offscreen surface.
+		///
+		/// Note that the constant `ATTRIB_NONE` which has the type `Attrib` can be used
+		/// instead of `NONE` to terminate the attribute list.
+		///
+		/// This will return a `BadParameter` error if `attrib_list` is not a valid
+		/// attributes list (if it does not terminate with `ATTRIB_NONE`).
+		///
+		/// # Safety
+		///
+		/// The `native_pixmap` must be a valid pointer to a native pixmap.
+		/// and must belong to the same platform as `display`.
+		/// EGL considers the returned EGLSurface as belonging to that same platform.
+		/// The EGL extension that defines the platform to which display belongs
+		/// also defines the requirements for the `native_pixmap` parameter.
+		pub unsafe fn create_platform_pixmap_surface(
+			&self,
+			display: Display,
+			config: Config,
+			native_pixmap: NativePixmapType,
+			attrib_list: &[Attrib],
+		) -> Result<Surface, Error> {
+			check_attrib_list(attrib_list)?;
+
+			let surface = self.api.eglCreatePlatformPixmapSurface(
+				display.as_ptr(),
+				config.as_ptr(),
+				native_pixmap,
+				attrib_list.as_ptr(),
+			);
+			if surface != NO_SURFACE {
+				Ok(Surface::from_ptr(surface))
+			} else {
+				Err(self.get_error().unwrap())
+			}
+		}
+
+		/// Wait in the server for a sync object to be signalled.
+		///
+		/// This function is unsafe: if `display` does not match the [`Display`] passed to [`create_sync`](Self::create_sync)
+		/// when `sync` was created, the behavior is undefined.
+		pub fn wait_sync(&self, display: Display, sync: Sync, flags: Int) -> Result<(), Error> {
+			unsafe {
+				if self.api.eglWaitSync(display.as_ptr(), sync.as_ptr(), flags) == TRUE {
+					Ok(())
+				} else {
+					Err(self.get_error().unwrap())
+				}
+			}
+		}
+	}
+}
+
+#[cfg(feature = "1_5")]
+pub use egl1_5::*;
+
+// -------------------------------------------------------------------------------------------------
+// FFI
+// -------------------------------------------------------------------------------------------------
+
+macro_rules! api {
+	($($id:ident : $version:literal { $(fn $name:ident ($($arg:ident : $atype:ty ),* ) -> $rtype:ty ;)* }),*) => {
+		#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
+		pub enum Version {
+			$(
+				#[cfg(feature=$version)]
+				$id,
+			)*
+		}
+
+		impl std::fmt::Display for Version {
+			fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+				match self {
+					$(
+						#[cfg(feature=$version)]
+						Version::$id => write!(f, $version),
+					)*
+				}
+			}
+		}
+
+		pub mod api {
+			use super::*;
+
+			api!(@api_traits () () $($id : $version { $(fn $name ($($arg : $atype ),* ) -> $rtype ;)* })*);
+		}
+
+		#[cfg(feature="static")]
+		mod ffi {
+			use libc::{c_char, c_void};
+
+			use super::{
+				Attrib, Boolean, EGLClientBuffer, EGLConfig, EGLContext, EGLDisplay, EGLImage, EGLSurface,
+				EGLSync, Enum, Int, NativeDisplayType, NativePixmapType, NativeWindowType, Time,
+			};
+
+			$(
+				extern "system" {
+					$(
+						#[cfg(feature=$version)]
+						pub fn $name ($($arg : $atype ),* ) -> $rtype ;
+					)*
+				}
+			)*
+		}
+
+		#[cfg(feature="static")]
+		/// Static EGL API interface.
+		///
+		/// This type is only available when the `static` feature is enabled,
+		/// by statically linking the EGL library at compile time.
+		#[derive(Copy, Clone, Debug)]
+		pub struct Static;
+
+		#[cfg(feature="static")]
+		impl Api for Static {
+			#[inline(always)]
+			fn version(&self) -> Version {
+				LATEST
+			}
+		}
+
+		#[cfg(feature="static")]
+		pub static API: Instance<Static> = Instance::new(Static);
+
+		#[cfg(feature="dynamic")]
+		extern crate libloading;
+
+		api!(@dynamic_struct $($id : $version { $(fn $name ($($arg : $atype ),* ) -> $rtype ;)* })*);
+		api!(@api_types () $($id : $version { $(fn $name ($($arg : $atype ),* ) -> $rtype ;)* })*);
+	};
+	(@dynamic_struct $($id:ident : $version:literal { $(fn $name:ident ($($arg:ident : $atype:ty ),* ) -> $rtype:ty ;)* })*) => {
+		#[cfg(feature="dynamic")]
+		#[derive(Debug)]
+		pub enum LoadError<L> {
+			/// Something wrong happend while loading the library.
+			Library(L),
+
+			/// The provided version does not meet the requirements.
+			InvalidVersion {
+				provided: Version,
+				required: Version
+			}
+		}
+
+		#[cfg(feature="dynamic")]
+		impl<L: std::error::Error + 'static> std::error::Error for LoadError<L> {
+			fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+				match self {
+					LoadError::Library(l) => Some(l),
+					_ => None
+				}
+			}
+		}
+
+		#[cfg(feature="dynamic")]
+		impl<L: std::fmt::Display> std::fmt::Display for LoadError<L> {
+			fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+				match self {
+					LoadError::Library(l) => write!(f, "Load error: {}", l),
+					LoadError::InvalidVersion { provided, required } => write!(f, "Invalid EGL API version (required {}, provided {})", required, provided)
+				}
+			}
+		}
+
+		#[cfg(feature="dynamic")]
+		struct RawDynamic<L> {
+			lib: L,
+			version: Version,
+			$(
+				$(
+					#[cfg(feature=$version)]
+					$name : std::mem::MaybeUninit<unsafe extern "system" fn($($atype ),*) -> $rtype>,
+				)*
+			)*
+		}
+
+		#[cfg(feature="dynamic")]
+		impl<L> RawDynamic<L> {
+			#[inline(always)]
+			/// Returns the underlying EGL library.
+			pub fn library(&self) -> &L {
+				&self.lib
+			}
+
+			#[inline(always)]
+			/// Returns the EGL version.
+			pub fn version(&self) -> Version {
+				self.version
+			}
+
+			#[inline(always)]
+			/// Sets the EGL version.
+			pub unsafe fn set_version(&mut self, version: Version) {
+				self.version = version
+			}
+
+			/// Wraps the given library but does not load the symbols.
+			pub unsafe fn unloaded(lib: L, version: Version) -> Self {
+				RawDynamic {
+					lib,
+					version,
+					$(
+						$(
+							#[cfg(feature=$version)]
+							$name : std::mem::MaybeUninit::uninit(),
+						)*
+					)*
+				}
+			}
+		}
+
+		#[cfg(feature="dynamic")]
+		/// Dynamic EGL API interface.
+		///
+		/// The first type parameter is the type of the underlying library handle.
+		/// The second `Dynamic` type parameter gives the EGL API version provided by the library.
+		///
+		/// This type is only available when the `dynamic` feature is enabled.
+		/// In most cases, you may prefer to directly use the `DynamicInstance` type.
+		pub struct Dynamic<L, A> {
+			raw: RawDynamic<L>,
+			_api_version: std::marker::PhantomData<A>
+		}
+
+		#[cfg(feature="dynamic")]
+		impl<L, A> Dynamic<L, A> {
+			#[inline(always)]
+			/// Return the underlying EGL library.
+			pub fn library(&self) -> &L {
+				self.raw.library()
+			}
+
+			/// Returns the provided EGL version.
+			pub fn version(&self) -> Version {
+				self.raw.version()
+			}
+
+			/// Wraps the given library but does not load the symbols.
+			pub(crate) unsafe fn unloaded(lib: L, version: Version) -> Self {
+				Dynamic {
+					raw: RawDynamic::unloaded(lib, version),
+					_api_version: std::marker::PhantomData
+				}
+			}
+		}
+
+		#[cfg(feature="dynamic")]
+		impl<L, A> Api for Dynamic<L, A> {
+			/// Returns the provided EGL version.
+			#[inline(always)]
+			fn version(&self) -> Version {
+				self.version()
+			}
+		}
+
+		#[cfg(feature="dynamic")]
+		#[cfg(feature="1_0")]
+		impl<L: std::borrow::Borrow<libloading::Library>> Dynamic<L, EGL1_0> {
+			#[inline]
+			/// Load the EGL API symbols from the given library.
+			///
+			/// This will load the most recent API provided by the library,
+			/// which is at least EGL 1.0.
+			/// You can check what version has actually been loaded using [`Dynamic::version`],
+			/// and/or convert to a more recent version using [`try_into`](TryInto::try_into).
+			///
+			/// ## Safety
+			/// This is fundamentally unsafe since there are no guaranties the input library complies to the EGL API.
+			pub unsafe fn load_from(lib: L) -> Result<Dynamic<L, EGL1_0>, libloading::Error> {
+				let mut result = Dynamic::unloaded(lib, Version::EGL1_0);
+
+				$(
+					match $id::load_from(&mut result.raw) {
+						Ok(()) => result.raw.set_version(Version::$id),
+						Err(libloading::Error::DlSymUnknown) => {
+							if Version::$id == Version::EGL1_0 {
+								return Err(libloading::Error::DlSymUnknown) // we require at least EGL 1.0.
+							} else {
+								return Ok(result)
+							}
+						},
+						Err(libloading::Error::DlSym { desc }) => {
+							if Version::$id == Version::EGL1_0 {
+								return Err(libloading::Error::DlSym { desc }) // we require at least EGL 1.0.
+							} else {
+								return Ok(result)
+							}
+						},
+						Err(e) => return Err(e)
+					}
+				)*
+
+				Ok(result)
+			}
+		}
+
+		#[cfg(feature="dynamic")]
+		#[cfg(feature="1_0")]
+		impl<L: std::borrow::Borrow<libloading::Library>> Instance<Dynamic<L, EGL1_0>> {
+			#[inline(always)]
+			/// Create an EGL instance using the symbols provided by the given library.
+			///
+			/// The most recent version of EGL provided by the given library is loaded.
+			/// You can check what version has actually been loaded using [`Instance::version`],
+			/// and/or convert to a more recent version using [`try_into`](TryInto::try_into).
+			///
+			/// ## Safety
+			/// This is fundamentally unsafe since there are no guaranties the input library complies to the EGL API.
+			pub unsafe fn load_from(lib: L) -> Result<Instance<Dynamic<L, EGL1_0>>, libloading::Error> {
+				Ok(Instance::new(Dynamic::<L, EGL1_0>::load_from(lib)?))
+			}
+		}
+
+		#[cfg(feature="dynamic")]
+		impl<L, V> Instance<Dynamic<L, V>> {
+			/// Cast the API.
+			#[inline(always)]
+			pub fn downcast<W>(&self) -> &Instance<Dynamic<L, W>> where Instance<Dynamic<L, V>>: Downcast<Instance<Dynamic<L, W>>> {
+				Downcast::downcast(self)
+			}
+
+			/// Cast the API.
+			#[inline(always)]
+			pub fn upcast<W>(&self) -> Option<&Instance<Dynamic<L, W>>> where Instance<Dynamic<L, V>>: Upcast<Instance<Dynamic<L, W>>> {
+				Upcast::upcast(self)
+			}
+		}
+
+		#[cfg(feature="dynamic")]
+		unsafe impl<L: std::borrow::Borrow<libloading::Library> + Send, A: Send> Send for Dynamic<L, A> {}
+
+		#[cfg(feature="dynamic")]
+		unsafe impl<L: std::borrow::Borrow<libloading::Library> + std::marker::Sync, A: std::marker::Sync> std::marker::Sync for Dynamic<L, A> {}
+
+		#[cfg(feature="dynamic")]
+		impl<L: std::borrow::Borrow<libloading::Library> + fmt::Debug, A> fmt::Debug for Dynamic<L, A> {
+			fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+				write!(f, "Dynamic({:?})", self.library())
+			}
+		}
+	};
+	(@api_traits ( ) ( ) $id:ident : $version:literal { $(fn $name:ident ($($arg:ident : $atype:ty ),* ) -> $rtype:ty ;)* } $($t_id:ident : $t_version:literal { $(fn $t_name:ident ($($t_arg:ident : $t_atype:ty ),* ) -> $t_rtype:ty ;)* })*) => {
+		api!(@api_trait ( ) ( ) $id : $version { $(fn $name ($($arg : $atype ),* ) -> $rtype ;)* });
+		api!(@api_traits ( $id : $version ) ( : $id ) $($t_id : $t_version { $(fn $t_name ($($t_arg : $t_atype ),* ) -> $t_rtype ;)* })*);
+	};
+	(@api_traits ( $($pred:ident : $p_version:literal)+ ) ( $($deps:tt)+ ) $id:ident : $version:literal { $(fn $name:ident ($($arg:ident : $atype:ty ),* ) -> $rtype:ty ;)* } $($t_id:ident : $t_version:literal { $(fn $t_name:ident ($($t_arg:ident : $t_atype:ty ),* ) -> $t_rtype:ty ;)* })*) => {
+		api!(@api_trait ( $($pred : $p_version)* ) ( $($deps)* ) $id : $version { $(fn $name ($($arg : $atype ),* ) -> $rtype ;)* });
+		api!(@api_traits ( $($pred : $version)* $id : $version ) ( $($deps)* + $id ) $($t_id : $t_version { $(fn $t_name ($($t_arg : $t_atype ),* ) -> $t_rtype ;)* })*);
+	};
+	(@api_traits ( $($pred:ident : $p_version:literal)* ) ( $($deps:tt)* )) => {
+		// nothing
+	};
+	(@api_trait ( $($pred:ident : $p_version:literal)* ) ( $($deps:tt)* ) $id:ident : $version:literal { $(fn $name:ident ($($arg:ident : $atype:ty ),* ) -> $rtype:ty ;)* }) => {
+		/// EGL API interface.
+		///
+		/// An implementation of this trait can be used to create an [`Instance`].
+		///
+		/// This crate provides two implementation of this trait:
+		///  - [`Static`] which is available with the `static` feature enabled,
+		///    defined by statically linking to the EGL library at compile time.
+		///  - [`Dynamic`] which is available with the `dynamic` feature enabled,
+		///    defined by dynamically linking to the EGL library at runtime.
+		///    In this case, you may prefer to directly use the `DynamicInstance` type.
+		#[cfg(feature=$version)]
+		pub unsafe trait $id $($deps)* {
+			$(
+				unsafe fn $name (&self, $($arg : $atype ),* ) -> $rtype ;
+			)*
+		}
+	};
+	(@api_types ( ) $id:ident : $version:literal { $(fn $name:ident ($($arg:ident : $atype:ty ),* ) -> $rtype:ty ;)* } $($t_id:ident : $t_version:literal { $(fn $t_name:ident ($($t_arg:ident : $t_atype:ty ),* ) -> $t_rtype:ty ;)* })*) => {
+		#[cfg(feature="dynamic")]
+		$(
+			#[cfg(not(feature=$t_version))]
+		)*
+		#[cfg(feature=$version)]
+		/// Latest available EGL version.
+		pub type Latest = $id;
+
+		$(
+			#[cfg(not(feature=$t_version))]
+		)*
+		#[cfg(feature=$version)]
+		/// Latest available EGL version.
+		pub const LATEST: Version = Version::$id;
+
+		api!(@api_type ( ) $id : $version { $(fn $name ($($arg : $atype ),* ) -> $rtype ;)* });
+		api!(@api_types ( $id : $version { $(fn $name ($($arg : $atype ),* ) -> $rtype ;)* } ) $($t_id : $t_version { $(fn $t_name ($($t_arg : $t_atype ),* ) -> $t_rtype ;)* })*);
+	};
+	(@api_types ( $($pred:ident : $p_version:literal { $(fn $p_name:ident ($($p_arg:ident : $p_atype:ty ),* ) -> $p_rtype:ty ;)* })+ ) $id:ident : $version:literal { $(fn $name:ident ($($arg:ident : $atype:ty ),* ) -> $rtype:ty ;)* } $($t_id:ident : $t_version:literal { $(fn $t_name:ident ($($t_arg:ident : $t_atype:ty ),* ) -> $t_rtype:ty ;)* })*) => {
+		#[cfg(feature="dynamic")]
+		$(
+			#[cfg(not(feature=$t_version))]
+		)*
+		#[cfg(feature=$version)]
+		/// Latest available EGL version.
+		pub type Latest = $id;
+
+		$(
+			#[cfg(not(feature=$t_version))]
+		)*
+		#[cfg(feature=$version)]
+		/// Latest available EGL version.
+		pub const LATEST: Version = Version::$id;
+
+		api!(@api_type ( $($pred : $p_version { $(fn $p_name ($($p_arg : $p_atype ),* ) -> $p_rtype ;)* })* ) $id : $version { $(fn $name ($($arg : $atype ),* ) -> $rtype ;)* });
+		api!(@api_types ( $($pred : $p_version { $(fn $p_name ($($p_arg : $p_atype ),* ) -> $p_rtype ;)* })* $id : $version { $(fn $name ($($arg : $atype ),* ) -> $rtype ;)* } ) $($t_id : $t_version { $(fn $t_name ($($t_arg : $t_atype ),* ) -> $t_rtype ;)* })*);
+	};
+	(@api_types ( $($pred:ident : $p_version:literal { $(fn $p_name:ident ($($p_arg:ident : $p_atype:ty ),* ) -> $p_rtype:ty ;)* })+ ) ) => {
+		#[cfg(feature="dynamic")]
+		#[cfg(feature="1_0")]
+		/// Alias for dynamically linked instances with the latest handled version of EGL.
+		pub type DynamicInstance<V = Latest> = Instance<Dynamic<libloading::Library, V>>;
+
+		#[cfg(feature="dynamic")]
+		#[cfg(feature="1_0")]
+		impl DynamicInstance<EGL1_0> {
+			#[inline(always)]
+			/// Create an EGL instance by finding and loading a dynamic library with the given filename.
+			///
+			/// See [`Library::new`](libloading::Library::new)
+			/// for more details on how the `filename` argument is used.
+			///
+			/// On Linux plateforms, the library is loaded with the `RTLD_NODELETE` flag.
+			/// See [#14](https://github.com/timothee-haudebourg/khronos-egl/issues/14) for more details.
+			///
+			/// ## Safety
+			/// This is fundamentally unsafe since there are no guaranties the input library complies to the EGL API.
+			pub unsafe fn load_from_filename<P: AsRef<std::ffi::OsStr>>(filename: P) -> Result<DynamicInstance<EGL1_0>, libloading::Error> {
+				#[cfg(target_os = "linux")]
+				let lib: libloading::Library = {
+					// On Linux, load library with `RTLD_NOW | RTLD_NODELETE` to fix a SIGSEGV
+					// See https://github.com/timothee-haudebourg/khronos-egl/issues/14 for more details.
+					libloading::os::unix::Library::open(Some(filename), 0x2 | 0x1000)?.into()
+				};
+				#[cfg(not(target_os = "linux"))]
+				let lib = libloading::Library::new(filename)?;
+				Self::load_from(lib)
+			}
+
+			#[inline(always)]
+			/// Create an EGL instance by finding and loading the `libEGL.so.1` or `libEGL.so` library.
+			///
+			/// This is equivalent to `DynamicInstance::load_from_filename("libEGL.so.1")`.
+			///
+			/// ## Safety
+			/// This is fundamentally unsafe since there are no guaranties the found library complies to the EGL API.
+			pub unsafe fn load() -> Result<DynamicInstance<EGL1_0>, libloading::Error> {
+				Self::load_from_filename("libEGL.so.1").or(Self::load_from_filename("libEGL.so"))
+			}
+		}
+	};
+	(@api_type ( $($pred:ident : $p_version:literal { $(fn $p_name:ident ($($p_arg:ident : $p_atype:ty ),* ) -> $p_rtype:ty ;)* })* ) $id:ident : $version:literal { $(fn $name:ident ($($arg:ident : $atype:ty ),* ) -> $rtype:ty ;)* }) => {
+		#[cfg(feature="static")]
+		#[cfg(feature=$version)]
+		unsafe impl api::$id for Static {
+			$(
+				#[inline(always)]
+				unsafe fn $name(&self, $($arg : $atype),*) -> $rtype {
+					ffi::$name($($arg),*)
+				}
+			)*
+		}
+
+		#[cfg(feature="dynamic")]
+		#[cfg(feature=$version)]
+		/// EGL version type.
+		///
+		/// Used by [`Dynamic`] to statically know the EGL API version provided by the library.
+		pub struct $id;
+
+		#[cfg(feature="dynamic")]
+		#[cfg(feature=$version)]
+		impl $id {
+			#[allow(unused_variables)]
+			unsafe fn load_from<L: std::borrow::Borrow<libloading::Library>>(raw: &mut RawDynamic<L>) -> Result<(), libloading::Error> {
+				let lib = raw.lib.borrow();
+
+				$(
+					let name = stringify!($name).as_bytes();
+					let symbol = lib.get::<unsafe extern "system" fn($($atype ),*) -> $rtype>(name)?;
+					#[cfg(unix)]
+					let ptr = (&symbol.into_raw().into_raw()) as *const *mut _ as *const unsafe extern "system" fn($($atype ),*) -> $rtype;
+					#[cfg(windows)]
+					let ptr = (&symbol.into_raw().into_raw()) as *const _ as *const unsafe extern "system" fn($($atype ),*) -> $rtype;
+					assert!(!ptr.is_null());
+					raw.$name = std::mem::MaybeUninit::new(*ptr);
+				)*
+
+				Ok(())
+			}
+		}
+
+		$(
+			#[cfg(feature="dynamic")]
+			#[cfg(feature=$version)]
+			unsafe impl<L: std::borrow::Borrow<libloading::Library>> api::$pred for Dynamic<L, $id> {
+				$(
+					#[inline(always)]
+					unsafe fn $p_name(&self, $($p_arg : $p_atype),*) -> $p_rtype {
+						(self.raw.$p_name.assume_init())($($p_arg),*)
+					}
+				)*
+			}
+		)*
+
+		#[cfg(feature="dynamic")]
+		#[cfg(feature=$version)]
+		unsafe impl<L: std::borrow::Borrow<libloading::Library>> api::$id for Dynamic<L, $id> {
+			$(
+				#[inline(always)]
+				unsafe fn $name(&self, $($arg : $atype),*) -> $rtype {
+					(self.raw.$name.assume_init())($($arg),*)
+				}
+			)*
+		}
+
+		$(
+			#[cfg(feature="dynamic")]
+			#[cfg(feature=$version)]
+			impl<L: std::borrow::Borrow<libloading::Library>> TryFrom<Dynamic<L, $pred>> for Dynamic<L, $id> {
+				type Error = Dynamic<L, $pred>;
+
+				fn try_from(other: Dynamic<L, $pred>) -> Result<Self, Dynamic<L, $pred>> {
+					if other.version() >= Version::$id {
+						Ok(Dynamic {
+							raw: other.raw,
+							_api_version: std::marker::PhantomData
+						})
+					} else {
+						Err(other)
+					}
+				}
+			}
+
+			#[cfg(feature="dynamic")]
+			#[cfg(feature=$version)]
+			impl<L: std::borrow::Borrow<libloading::Library>> From<Dynamic<L, $id>> for Dynamic<L, $pred> {
+				fn from(other: Dynamic<L, $id>) -> Self {
+					Dynamic {
+						raw: other.raw,
+						_api_version: std::marker::PhantomData
+					}
+				}
+			}
+
+			#[cfg(feature="dynamic")]
+			#[cfg(feature=$version)]
+			impl<L: std::borrow::Borrow<libloading::Library>> AsRef<Dynamic<L, $pred>> for Dynamic<L, $id> {
+				fn as_ref(&self) -> &Dynamic<L, $pred> {
+					unsafe { std::mem::transmute(self) } // this is safe because both types have the same repr.
+				}
+			}
+
+			#[cfg(feature="dynamic")]
+			#[cfg(feature=$version)]
+			impl<L: std::borrow::Borrow<libloading::Library>> Downcast<Dynamic<L, $pred>> for Dynamic<L, $id> {
+				fn downcast(&self) -> &Dynamic<L, $pred> {
+					unsafe { std::mem::transmute(self) } // this is safe because both types have the same repr.
+				}
+			}
+
+			#[cfg(feature="dynamic")]
+			#[cfg(feature=$version)]
+			impl<L: std::borrow::Borrow<libloading::Library>> Downcast<Instance<Dynamic<L, $pred>>> for Instance<Dynamic<L, $id>> {
+				fn downcast(&self) -> &Instance<Dynamic<L, $pred>> {
+					unsafe { std::mem::transmute(self) } // this is safe because both types have the same repr.
+				}
+			}
+
+			#[cfg(feature="dynamic")]
+			#[cfg(feature=$version)]
+			impl<L: std::borrow::Borrow<libloading::Library>> Upcast<Dynamic<L, $id>> for Dynamic<L, $pred> {
+				fn upcast(&self) -> Option<&Dynamic<L, $id>> {
+					if self.version() >= Version::$id {
+						Some(unsafe { std::mem::transmute(self) }) // this is safe because both types have the same repr.
+					} else {
+						None
+					}
+				}
+			}
+
+			#[cfg(feature="dynamic")]
+			#[cfg(feature=$version)]
+			impl<L: std::borrow::Borrow<libloading::Library>> Upcast<Instance<Dynamic<L, $id>>> for Instance<Dynamic<L, $pred>> {
+				fn upcast(&self) -> Option<&Instance<Dynamic<L, $id>>> {
+					if self.version() >= Version::$id {
+						Some(unsafe { std::mem::transmute(self) }) // this is safe because both types have the same repr.
+					} else {
+						None
+					}
+				}
+			}
+		)*
+
+		#[cfg(feature="dynamic")]
+		#[cfg(feature=$version)]
+		impl<L: std::borrow::Borrow<libloading::Library>> Dynamic<L, $id> {
+			#[inline]
+			/// Load the EGL API symbols from the given library.
+			///
+			/// The second `Dynamic` type parameter gives the EGL API version expected to be provided by the library.
+			///
+			/// ## Safety
+			/// This is fundamentally unsafe since there are no guaranties the input library complies to the EGL API.
+			pub unsafe fn load_required(lib: L) -> Result<Dynamic<L, $id>, LoadError<libloading::Error>> {
+				match Dynamic::<L, EGL1_0>::load_from(lib) {
+					Ok(dynamic) => {
+						let provided = dynamic.version();
+						match dynamic.try_into() {
+							Ok(t) => Ok(t),
+							Err(_) => Err(LoadError::InvalidVersion {
+								provided,
+								required: Version::$id
+							})
+						}
+					},
+					Err(e) => Err(LoadError::Library(e))
+				}
+			}
+		}
+
+		#[cfg(feature="dynamic")]
+		#[cfg(feature=$version)]
+		impl<L: std::borrow::Borrow<libloading::Library>> Instance<Dynamic<L, $id>> {
+			#[inline(always)]
+			/// Create an EGL instance using the symbols provided by the given library.
+			/// This function fails if the EGL library does not provide the minimum required version given by the type parameter.
+			///
+			/// ## Safety
+			/// This is fundamentally unsafe since there are no guaranties the input library complies to the EGL API.
+			pub unsafe fn load_required_from(lib: L) -> Result<Instance<Dynamic<L, $id>>, LoadError<libloading::Error>> {
+				Ok(Instance::new(Dynamic::<L, $id>::load_required(lib)?))
+			}
+		}
+
+		#[cfg(feature="dynamic")]
+		#[cfg(feature=$version)]
+		impl DynamicInstance<$id> {
+			#[inline(always)]
+			/// Create an EGL instance by finding and loading a dynamic library with the given filename.
+			/// This function fails if the EGL library does not provide the minimum required version given by the type parameter.
+			///
+			/// See [`Library::new`](libloading::Library::new)
+			/// for more details on how the `filename` argument is used.
+			///
+			/// On Linux plateforms, the library is loaded with the `RTLD_NODELETE` flag.
+			/// See [#14](https://github.com/timothee-haudebourg/khronos-egl/issues/14) for more details.
+			///
+			/// ## Safety
+			/// This is fundamentally unsafe since there are no guaranties the input library complies to the EGL API.
+			pub unsafe fn load_required_from_filename<P: AsRef<std::ffi::OsStr>>(filename: P) -> Result<DynamicInstance<$id>, LoadError<libloading::Error>> {
+				#[cfg(target_os = "linux")]
+				let lib: libloading::Library = {
+					// On Linux, load library with `RTLD_NOW | RTLD_NODELETE` to fix a SIGSEGV
+					// See https://github.com/timothee-haudebourg/khronos-egl/issues/14 for more details.
+					libloading::os::unix::Library::open(Some(filename), 0x2 | 0x1000).map_err(LoadError::Library)?.into()
+				};
+				#[cfg(not(target_os = "linux"))]
+				let lib = libloading::Library::new(filename).map_err(LoadError::Library)?;
+				Self::load_required_from(lib)
+			}
+
+			#[inline(always)]
+			/// Create an EGL instance by finding and loading the `libEGL.so.1` or `libEGL.so` library.
+			/// This function fails if the EGL library does not provide the minimum required version given by the type parameter.
+			///
+			/// This is equivalent to `DynamicInstance::load_required_from_filename("libEGL.so.1")`.
+			///
+			/// ## Safety
+			/// This is fundamentally unsafe since there are no guaranties the found library complies to the EGL API.
+			pub unsafe fn load_required() -> Result<DynamicInstance<$id>, LoadError<libloading::Error>> {
+			    Self::load_required_from_filename("libEGL.so.1").or(Self::load_required_from_filename("libEGL.so"))
+			}
+		}
+	}
+}
+
+api! {
+	EGL1_0 : "1_0" {
+		fn eglChooseConfig(
+			display: EGLDisplay,
+			attrib_list: *const Int,
+			configs: *mut EGLConfig,
+			config_size: Int,
+			num_config: *mut Int
+		) -> Boolean;
+		fn eglCopyBuffers(
+			display: EGLDisplay,
+			surface: EGLSurface,
+			target: NativePixmapType
+		) -> Boolean;
+		fn eglCreateContext(
+			display: EGLDisplay,
+			config: EGLConfig,
+			share_context: EGLContext,
+			attrib_list: *const Int
+		) -> EGLContext;
+		fn eglCreatePbufferSurface(
+			display: EGLDisplay,
+			config: EGLConfig,
+			attrib_list: *const Int
+		) -> EGLSurface;
+		fn eglCreatePixmapSurface(
+			display: EGLDisplay,
+			config: EGLConfig,
+			pixmap: NativePixmapType,
+			attrib_list: *const Int
+		) -> EGLSurface;
+		fn eglCreateWindowSurface(
+			display: EGLDisplay,
+			config: EGLConfig,
+			win: NativeWindowType,
+			attrib_list: *const Int
+		) -> EGLSurface;
+		fn eglDestroyContext(display: EGLDisplay, ctx: EGLContext) -> Boolean;
+		fn eglDestroySurface(display: EGLDisplay, surface: EGLSurface) -> Boolean;
+		fn eglGetConfigAttrib(
+			display: EGLDisplay,
+			config: EGLConfig,
+			attribute: Int,
+			value: *mut Int
+		) -> Boolean;
+		fn eglGetConfigs(
+			display: EGLDisplay,
+			configs: *mut EGLConfig,
+			config_size: Int,
+			num_config: *mut Int
+		) -> Boolean;
+		fn eglGetCurrentDisplay() -> EGLDisplay;
+		fn eglGetCurrentSurface(readdraw: Int) -> EGLSurface;
+		fn eglGetDisplay(display_id: NativeDisplayType) -> EGLDisplay;
+		fn eglGetError() -> Int;
+		fn eglGetProcAddress(procname: *const c_char) -> extern "system" fn();
+		fn eglInitialize(display: EGLDisplay, major: *mut Int, minor: *mut Int) -> Boolean;
+		fn eglMakeCurrent(
+			display: EGLDisplay,
+			draw: EGLSurface,
+			read: EGLSurface,
+			ctx: EGLContext
+		) -> Boolean;
+		fn eglQueryContext(
+			display: EGLDisplay,
+			ctx: EGLContext,
+			attribute: Int,
+			value: *mut Int
+		) -> Boolean;
+		fn eglQueryString(display: EGLDisplay, name: Int) -> *const c_char;
+		fn eglQuerySurface(
+			display: EGLDisplay,
+			surface: EGLSurface,
+			attribute: Int,
+			value: *mut Int
+		) -> Boolean;
+		fn eglSwapBuffers(display: EGLDisplay, surface: EGLSurface) -> Boolean;
+		fn eglTerminate(display: EGLDisplay) -> Boolean;
+		fn eglWaitGL() -> Boolean;
+		fn eglWaitNative(engine: Int) -> Boolean;
+	},
+
+	EGL1_1 : "1_1" {
+		fn eglBindTexImage(display: EGLDisplay, surface: EGLSurface, buffer: Int) -> Boolean;
+		fn eglReleaseTexImage(display: EGLDisplay, surface: EGLSurface, buffer: Int) -> Boolean;
+		fn eglSurfaceAttrib(
+			display: EGLDisplay,
+			surface: EGLSurface,
+			attribute: Int,
+			value: Int
+		) -> Boolean;
+		fn eglSwapInterval(display: EGLDisplay, interval: Int) -> Boolean;
+	},
+
+	EGL1_2 : "1_2" {
+		fn eglBindAPI(api: Enum) -> Boolean;
+		fn eglQueryAPI() -> Enum;
+		fn eglCreatePbufferFromClientBuffer(
+			display: EGLDisplay,
+			buftype: Enum,
+			buffer: EGLClientBuffer,
+			config: EGLConfig,
+			attrib_list: *const Int
+		) -> EGLSurface;
+		fn eglReleaseThread() -> Boolean;
+		fn eglWaitClient() -> Boolean;
+	},
+
+	EGL1_3 : "1_3" {
+		// nothing.
+	},
+
+	EGL1_4 : "1_4" {
+		fn eglGetCurrentContext() -> EGLContext;
+	},
+
+	EGL1_5 : "1_5" {
+		fn eglCreateSync(display: EGLDisplay, type_: Enum, attrib_list: *const Attrib) -> EGLSync;
+		fn eglDestroySync(display: EGLDisplay, sync: EGLSync) -> Boolean;
+		fn eglClientWaitSync(display: EGLDisplay, sync: EGLSync, flags: Int, timeout: Time) -> Int;
+		fn eglGetSyncAttrib(
+			display: EGLDisplay,
+			sync: EGLSync,
+			attribute: Int,
+			value: *mut Attrib
+		) -> Boolean;
+		fn eglCreateImage(
+			display: EGLDisplay,
+			ctx: EGLContext,
+			target: Enum,
+			buffer: EGLClientBuffer,
+			attrib_list: *const Attrib
+		) -> EGLImage;
+		fn eglDestroyImage(display: EGLDisplay, image: EGLImage) -> Boolean;
+		fn eglGetPlatformDisplay(
+			platform: Enum,
+			native_display: *mut c_void,
+			attrib_list: *const Attrib
+		) -> EGLDisplay;
+		fn eglCreatePlatformWindowSurface(
+			display: EGLDisplay,
+			config: EGLConfig,
+			native_window: *mut c_void,
+			attrib_list: *const Attrib
+		) -> EGLSurface;
+		fn eglCreatePlatformPixmapSurface(
+			display: EGLDisplay,
+			config: EGLConfig,
+			native_pixmap: *mut c_void,
+			attrib_list: *const Attrib
+		) -> EGLSurface;
+		fn eglWaitSync(display: EGLDisplay, sync: EGLSync, flags: Int) -> Boolean;
+	}
+}