surfman/platform/generic/egl/
ffi.rs

1// surfman/surfman/src/platform/generic/egl/ffi.rs
2//
3//! FFI-related functionality common to the various EGL backends.
4
5#![allow(dead_code)]
6
7use crate::egl::types::{EGLAttrib, EGLBoolean, EGLContext, EGLDeviceEXT, EGLDisplay, EGLSurface};
8use crate::egl::types::{EGLenum, EGLint};
9
10use std::os::raw::c_void;
11use std::sync::LazyLock;
12
13pub enum EGLClientBufferOpaque {}
14pub type EGLClientBuffer = *mut EGLClientBufferOpaque;
15
16pub enum EGLImageKHROpaque {}
17pub type EGLImageKHR = *mut EGLImageKHROpaque;
18
19pub const EGL_GL_TEXTURE_2D_KHR: EGLenum = 0x30b1;
20pub const EGL_IMAGE_PRESERVED_KHR: EGLenum = 0x30d2;
21pub const EGL_CONTEXT_MINOR_VERSION_KHR: EGLenum = 0x30fb;
22pub const EGL_CONTEXT_OPENGL_PROFILE_MASK: EGLenum = 0x30fd;
23pub const EGL_PLATFORM_DEVICE_EXT: EGLenum = 0x313f;
24pub const EGL_NATIVE_BUFFER_ANDROID: EGLenum = 0x3140;
25pub const EGL_PLATFORM_X11_KHR: EGLenum = 0x31d5;
26pub const EGL_PLATFORM_WAYLAND_KHR: EGLenum = 0x31d8;
27pub const EGL_PLATFORM_SURFACELESS_MESA: EGLenum = 0x31dd;
28pub const EGL_D3D_TEXTURE_2D_SHARE_HANDLE_ANGLE: EGLenum = 0x3200;
29pub const EGL_BAD_DEVICE_EXT: EGLenum = 0x322b;
30pub const EGL_DEVICE_EXT: EGLenum = 0x322c;
31pub const EGL_D3D11_DEVICE_ANGLE: EGLenum = 0x33a1;
32pub const EGL_DXGI_KEYED_MUTEX_ANGLE: EGLenum = 0x33a2;
33pub const EGL_D3D_TEXTURE_ANGLE: EGLenum = 0x33a3;
34
35pub const EGL_NO_DEVICE_EXT: EGLDeviceEXT = 0 as EGLDeviceEXT;
36pub const EGL_NO_IMAGE_KHR: EGLImageKHR = 0 as EGLImageKHR;
37
38pub const EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT: EGLint = 1;
39pub const EGL_CONTEXT_OPENGL_COMPATIBILITY_PROFILE_BIT: EGLint = 2;
40
41#[allow(non_snake_case)]
42pub(crate) struct EGLExtensionFunctions {
43    // Ubiquitous extensions assumed to be present
44    pub(crate) CreateImageKHR: extern "C" fn(
45        dpy: EGLDisplay,
46        ctx: EGLContext,
47        target: EGLenum,
48        buffer: EGLClientBuffer,
49        attrib_list: *const EGLint,
50    ) -> EGLImageKHR,
51    pub(crate) DestroyImageKHR: extern "C" fn(dpy: EGLDisplay, image: EGLImageKHR) -> EGLBoolean,
52    pub(crate) ImageTargetTexture2DOES: extern "C" fn(target: EGLenum, image: EGLImageKHR),
53
54    // Optional extensions
55    pub(crate) CreateDeviceANGLE: Option<
56        extern "C" fn(
57            device_type: EGLint,
58            native_device: *mut c_void,
59            attrib_list: *const EGLAttrib,
60        ) -> EGLDeviceEXT,
61    >,
62    pub(crate) GetNativeClientBufferANDROID:
63        Option<extern "C" fn(buffer: *const c_void) -> EGLClientBuffer>,
64    pub(crate) QueryDeviceAttribEXT: Option<
65        extern "C" fn(device: EGLDeviceEXT, attribute: EGLint, value: *mut EGLAttrib) -> EGLBoolean,
66    >,
67    pub(crate) QueryDisplayAttribEXT: Option<
68        extern "C" fn(dpy: EGLDisplay, attribute: EGLint, value: *mut EGLAttrib) -> EGLBoolean,
69    >,
70    pub(crate) QuerySurfacePointerANGLE: Option<
71        extern "C" fn(
72            dpy: EGLDisplay,
73            surface: EGLSurface,
74            attribute: EGLint,
75            value: *mut *mut c_void,
76        ) -> EGLBoolean,
77    >,
78}
79
80pub(crate) static EGL_EXTENSION_FUNCTIONS: LazyLock<EGLExtensionFunctions> = LazyLock::new(|| {
81    use crate::platform::generic::egl::device::lookup_egl_extension as get;
82    use std::mem::transmute as cast;
83    unsafe {
84        EGLExtensionFunctions {
85            CreateImageKHR: cast(get(c"eglCreateImageKHR")),
86            DestroyImageKHR: cast(get(c"eglDestroyImageKHR")),
87            ImageTargetTexture2DOES: cast(get(c"glEGLImageTargetTexture2DOES")),
88
89            CreateDeviceANGLE: cast(get(c"eglCreateDeviceANGLE")),
90            GetNativeClientBufferANDROID: cast(get(c"eglGetNativeClientBufferANDROID")),
91            QueryDeviceAttribEXT: cast(get(c"eglQueryDeviceAttribEXT")),
92            QueryDisplayAttribEXT: cast(get(c"eglQueryDisplayAttribEXT")),
93            QuerySurfacePointerANGLE: cast(get(c"eglQuerySurfacePointerANGLE")),
94        }
95    }
96});
surfman/platform/generic/egl/ffi.rs

surfman/platform/generic/egl/
ffi.rs
