A portable, spec-compliant implementation of EGL 1.5 built around a platform-agnostic core and pluggable OS/rendering backends. The library provides the standard EGL surface creation, context management, and synchronization API across operating systems, so that applications can share a single EGL-based rendering path regardless of the underlying platform.

The Khronos headers bundled with the library are the official, unmodified ones from the EGL Registry (commit e80a2e0050, 2026-03-19).

The full EGL 1.5 API surface is implemented in the platform-agnostic core:

• Display management: eglGetDisplay, eglInitialize, eglTerminate, eglGetPlatformDisplay
• Config selection: eglGetConfigs, eglChooseConfig, eglGetConfigAttrib
• Context management: eglCreateContext, eglDestroyContext, eglMakeCurrent, eglGetCurrentContext, eglGetCurrentDisplay, eglGetCurrentSurface, eglQueryContext
• Surface management: eglCreateWindowSurface, eglCreatePbufferSurface, eglCreatePixmapSurface, eglCreatePlatformWindowSurface, eglCreatePlatformPixmapSurface, eglDestroySurface, eglQuerySurface, eglSurfaceAttrib
• Rendering: eglSwapBuffers, eglSwapInterval, eglCopyBuffers, eglBindTexImage, eglReleaseTexImage, eglWaitClient, eglWaitNative
• Sync objects (EGL 1.5 / GL_ARB_sync): eglCreateSync, eglDestroySync, eglClientWaitSync, eglWaitSync, eglGetSyncAttrib, eglSignalSync
• Image objects: eglCreateImage, eglDestroyImage
• Threading: eglBindAPI, eglQueryAPI, eglReleaseThread (per-thread state via thread_local)
• Utilities: eglGetError, eglGetProcAddress, eglQueryString

The following colorspace extensions are probed at eglInitialize time and advertised only if the driver and display support them:

Requirements: CMake 3.10+, MSVC (Visual Studio 2019+), Vulkan SDK.

mkdir build
cd build
cmake ..
cmake --build .

Release build:

cmake -DCMAKE_BUILD_TYPE=Release ..
cmake --build . --config Release

Outputs: lib/libEGL.lib and the example executables under bin/.

If CMake cannot find the Vulkan SDK, ensure VULKAN_SDK is set in your environment.

Cross-compile with the target toolchain. CMake selects the correct platform branch automatically based on CMAKE_SYSTEM_NAME. For Linux sub-platforms pass the appropriate define:

# Wayland
cmake .. -DWL_EGL_PLATFORM=1

# GBM / DRM-KMS
cmake .. -DGBM_PLATFORM=1

# Ozone
cmake .. -DOZONE_PLATFORM=1

Non-Windows builds will compile until the link stage and then fail on the 17 unimplemented __ backend functions — this is intentional and indicates where the new backend code goes.

Each example checks at runtime whether its colorspace is supported and exits with a message if not.

egl.c                     Public C API (thin shims, no logic)
  └── egl_globals.cpp      Global + per-thread storage, init/terminate lifecycle
  └── egl_config.cpp       Config selection and queries
  └── egl_display.cpp      Display management and extension string
  └── egl_context.cpp      Context create/destroy/makecurrent
  └── egl_surface.cpp      Surface create/destroy/query
  └── egl_sync.cpp         Sync objects (EGL 1.5)
  └── egl_image.cpp        Image objects (EGL 1.5)
  └── egl_api.cpp          Swap, bind, wait, getProcAddress

  Internal headers:
  └── egl_internal.h       Backend interface declarations (implemented by platform backends)
  └── egl_common.h         Shared internal types and helpers
  └── egl_windows_vk.h     Windows Vulkan HDR — internal declarations for egl_windows_vk.cpp
  └── wglext.h             WGL extension prototypes (Windows)

  Platform backends (implement the functions declared in egl_internal.h):
  └── egl_windows.cpp      Windows — WGL
  └── egl_windows_vk.cpp   Windows — Vulkan HDR presentation
  └── egl_<platform>.cpp   Future backends

19.04.2026 - Major refactoring using AI v1.0.0.

29.01.2015 - Updated to GLEW 1.12.0. v0.3.3.

25.01.2015 - Fixed initialization bug on Windows. v0.3.3.

20.01.2015 - Added GLX version check. Fixed window creation bug on X11. v0.3.2.

05.12.2014 - Removed duplicate code. v0.3.1.

04.12.2014 - Working X11 version. v0.3.0.

28.11.2014 - Continued X11 implementation. v0.2.3.

22.11.2014 - X11 compiling but not complete. v0.2.2.

18.11.2014 - Added X11 build configuration. v0.2.1.

17.11.2014 - First public release. v0.2.