comm-central/third_party/rust/khronos-egl/src/lib.rs

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//! 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.
///
/// ## 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
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<$id> {
#[inline(always)]
/// Create an EGL instance by finding and loading a dynamic library with the given filename.
/// This function fails if the EGL library does not provide the minimum required version given by the type parameter.
///
/// See [`Library::new`](libloading::Library::new)
/// for more details on how the `filename` argument is used.
///
/// On Linux plateforms, the library is loaded with the `RTLD_NODELETE` flag.
///
/// ## Safety
/// This is fundamentally unsafe since there are no guaranties the input library complies to the EGL API.
pub unsafe fn load_required_from_filename<P: AsRef<std::ffi::OsStr>>(filename: P) -> Result<DynamicInstance<$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
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;
}
}