egl: Advertise EGL_MESA_gl_interop extension if support present

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
Acked-by: Antonio Gomes <antoniospg100@gmail.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Reviewed-by: Eric Engestrom <eric@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24573>

src/egl/drivers/dri2/egl_dri2.c

@@ -870,6 +870,10 @@ dri2_setup_screen(_EGLDisplay *disp)
    disp->Extensions.KHR_no_config_context = EGL_TRUE;
    disp->Extensions.KHR_surfaceless_context = EGL_TRUE;
 
+   if (dri2_dpy->interop) {
+      disp->Extensions.MESA_gl_interop = EGL_TRUE;
+   }
+
    if (dri2_dpy->configOptions) {
       disp->Extensions.MESA_query_driver = EGL_TRUE;
    }

src/egl/main/eglapi.c

@@ -588,6 +588,7 @@ _eglCreateExtensionsString(_EGLDisplay *disp)
    if (disp->Extensions.KHR_no_config_context)
       _eglAppendExtension(&exts, "EGL_MESA_configless_context");
    _EGL_CHECK_EXTENSION(MESA_drm_image);
+   _EGL_CHECK_EXTENSION(MESA_gl_interop);
    _EGL_CHECK_EXTENSION(MESA_image_dma_buf_export);
    _EGL_CHECK_EXTENSION(MESA_query_driver);
 

src/egl/main/egldisplay.h

@@ -141,6 +141,7 @@ struct _egl_extensions {
    EGLBoolean KHR_wait_sync;
 
    EGLBoolean MESA_drm_image;
+   EGLBoolean MESA_gl_interop;
    EGLBoolean MESA_image_dma_buf_export;
    EGLBoolean MESA_query_driver;