glamor: Add a function to get the driver name via EGL_MESA_query_driver

This maps to eglGetDisplayDriverName if EGL_MESA_query_render is
supported, otherwise it returns NULL.

glamor/glamor.h

@@ -399,6 +399,8 @@ extern _X_EXPORT Bool
                                                struct gbm_bo *bo,
                                                Bool used_modifiers);
 
+extern _X_EXPORT const char *glamor_egl_get_driver_name(ScreenPtr screen);
+
 #endif
 
 extern _X_EXPORT void glamor_egl_screen_init(ScreenPtr screen,

glamor/glamor_egl.c

@@ -700,6 +700,22 @@ glamor_get_modifiers(ScreenPtr screen, uint32_t format,
 #endif
 }
 
+_X_EXPORT const char *
+glamor_egl_get_driver_name(ScreenPtr screen)
+{
+#ifdef GLAMOR_HAS_EGL_QUERY_DRIVER
+    struct glamor_egl_screen_private *glamor_egl;
+
+    glamor_egl = glamor_egl_get_screen_private(xf86ScreenToScrn(screen));
+
+    if (epoxy_has_egl_extension(glamor_egl->display, "EGL_MESA_query_driver"))
+        return eglGetDisplayDriverName(glamor_egl->display);
+#endif
+
+    return NULL;
+}
+
+
 static Bool
 glamor_egl_destroy_pixmap(PixmapPtr pixmap)
 {

include/meson.build

@@ -97,6 +97,8 @@ conf_data.set('HAVE_XSHMFENCE', xshmfence_dep.found())
 conf_data.set('WITH_LIBDRM', libdrm_required)
 conf_data.set('GLAMOR_HAS_EGL_QUERY_DMABUF',
               epoxy_dep.found() and epoxy_dep.version().version_compare('>= 1.4.4'))
+conf_data.set('GLAMOR_HAS_EGL_QUERY_DRIVER',
+              epoxy_dep.found() and epoxy_dep.version().version_compare('>= 1.5.4'))
 conf_data.set('GLXEXT', build_glx)
 conf_data.set('GLAMOR', build_glamor)
 conf_data.set('GLAMOR_HAS_GBM', gbm_dep.found())