Name KHR_platform_haiku Name Strings EGL_KHR_platform_haiku Contributors Alexander von Gluck IV Contacts Alexander von Gluck IV Status Draft. Version Version 1, 2023/03/29 Number EGL Extension TBD Extension Type EGL client extension Dependencies EGL 1.5 is required. This extension is written against the EGL 1.5 Specification (draft 20140122). Overview This extension defines how to create EGL resources from native Haiku resources using the EGL 1.5 platform functionality. Mesa has tracked _EGL_PLATFORM_HAIKU internally for quite some time. libglvnd has received patches for basic Haiku support New Types None New Procedures and Functions None New Tokens Accepted as the argument of eglGetPlatformDisplay: EGL_PLATFORM_HAIKU_KHR 0x31D9 Additions to the EGL Specification None. New Behavior To determine if the EGL implementation supports this extension, clients should query the EGL_EXTENSIONS string of EGL_NO_DISPLAY. To obtain an EGLDisplay backed by a Haiku display, call eglGetPlatformDisplay with set to EGL_PLATFORM_HAIKU_KHR. The parameter specifies the Haiku display to use and must either point to a `struct wl_display` or be EGL_DEFAULT_DISPLAY. If is EGL_DEFAULT_DISPLAY, then EGL will create a new wl_display structure by connecting to the default Wayland socket. The manual page wl_display_connect(3) defines the location of the default Wayland socket. To obtain an on-screen rendering surface from a Wayland window, call eglCreatePlatformWindowSurface with a that belongs to Wayland and a that points to a `struct wl_egl_surface`. It is not valid to call eglCreatePlatformPixmapSurface with a that belongs to Haiku. Any such call fails and generates an EGL_BAD_PARAMETER error. Rendering to the obtained EGLSurface or querying it with EGL_BUFFER_AGE_KHR will lock its back buffer preventing it from being dropped or resized, until the next buffer swap. The rationale behind this behavior is to keep operations result accurate until the next swap. Issues TBD Revision History Version 1, 2023/03/29 (Alexander von Gluck IV) - Initial Draft version for Haiku with EGL 1.5+