cogl: add Mir EGL platform

cogl/Makefile.am

@@ -503,6 +503,11 @@ cogl_sources_c += \
 	$(srcdir)/winsys/cogl-winsys-egl-android.c \
 	$(srcdir)/winsys/cogl-winsys-egl-android-private.h
 endif
+if SUPPORT_EGL_PLATFORM_MIR
+cogl_sources_c += \
+	$(srcdir)/winsys/cogl-winsys-egl-mir.c \
+	$(srcdir)/winsys/cogl-winsys-egl-mir-private.h
+endif
 if SUPPORT_EGL
 cogl_experimental_h += \
        $(srcdir)/cogl-egl.h

cogl/cogl-onscreen.h

@@ -267,6 +267,11 @@ cogl_wayland_onscreen_resize (CoglOnscreen *onscreen,
                               int           offset_y);
 #endif /* COGL_HAS_EGL_PLATFORM_WAYLAND_SUPPORT */
 
+#if defined (COGL_HAS_EGL_PLATFORM_MIR_SUPPORT)
+struct MirSurface *
+cogl_mir_onscreen_get_surface (CoglOnscreen *onscreen);
+#endif /* COGL_HAS_EGL_PLATFORM_MIR_SUPPORT */
+
 /**
  * cogl_onscreen_set_swap_throttled:
  * @onscreen: A #CoglOnscreen framebuffer

cogl/cogl-renderer.c

@@ -66,6 +66,9 @@
 #ifdef COGL_HAS_EGL_PLATFORM_ANDROID_SUPPORT
 #include "cogl-winsys-egl-android-private.h"
 #endif
+#ifdef COGL_HAS_EGL_PLATFORM_MIR_SUPPORT
+#include "cogl-winsys-egl-mir-private.h"
+#endif
 #ifdef COGL_HAS_EGL_PLATFORM_POWERVR_NULL_SUPPORT
 #include "cogl-winsys-egl-null-private.h"
 #endif
@@ -213,6 +216,9 @@ static CoglWinsysVtableGetter _cogl_winsys_vtable_getters[] =
 #ifdef COGL_HAS_EGL_PLATFORM_ANDROID_SUPPORT
   _cogl_winsys_egl_android_get_vtable,
 #endif
+#ifdef COGL_HAS_EGL_PLATFORM_MIR_SUPPORT
+  _cogl_winsys_egl_mir_get_vtable,
+#endif
 #ifdef COGL_HAS_EGL_PLATFORM_POWERVR_NULL_SUPPORT
   _cogl_winsys_egl_null_get_vtable,
 #endif

cogl/cogl-renderer.h

@@ -168,6 +168,7 @@ cogl_renderer_new (void);
  * @COGL_WINSYS_ID_EGL_WAYLAND: Use EGL with the Wayland window system
  * @COGL_WINSYS_ID_EGL_KMS: Use EGL with the KMS platform
  * @COGL_WINSYS_ID_EGL_ANDROID: Use EGL with the Android platform
+ * @COGL_WINSYS_ID_EGL_MIR: Use EGL with the Mir server
  * @COGL_WINSYS_ID_WGL: Use the Microsoft Windows WGL binding API
  * @COGL_WINSYS_ID_SDL: Use the SDL window system
  *
@@ -187,6 +188,7 @@ typedef enum
   COGL_WINSYS_ID_EGL_WAYLAND,
   COGL_WINSYS_ID_EGL_KMS,
   COGL_WINSYS_ID_EGL_ANDROID,
+  COGL_WINSYS_ID_EGL_MIR,
   COGL_WINSYS_ID_WGL,
   COGL_WINSYS_ID_SDL
 } CoglWinsysID;

cogl/winsys/cogl-winsys-egl-mir-private.h

@@ -0,0 +1,39 @@
+/*
+ * Cogl
+ *
+ * A Low-Level GPU Graphics and Utilities API
+ *
+ * Copyright (C) 2011 Canonical Ltd.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ *
+ */
+
+#ifndef __COGL_WINSYS_EGL_MIR_PRIVATE_H
+#define __COGL_WINSYS_EGL_MIR_PRIVATE_H
+
+#include "cogl-winsys-private.h"
+
+const CoglWinsysVtable *
+_cogl_winsys_egl_mir_get_vtable (void);
+
+#endif /* __COGL_WINSYS_EGL_MIR_PRIVATE_H */

cogl/winsys/cogl-winsys-egl-mir.c

@@ -0,0 +1,447 @@
+/*
+ * Cogl
+ *
+ * A Low-Level GPU Graphics and Utilities API
+ *
+ * Copyright (C) 2014 Canonical Ltd.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ *
+ * Authors:
+ *   Marco Trevisan <marco.trevisan@canonical.com>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <mir_toolkit/mir_client_library.h>
+#include <string.h>
+#include <errno.h>
+
+#include "cogl-winsys-egl-mir-private.h"
+#include "cogl-winsys-egl-private.h"
+#include "cogl-renderer-private.h"
+#include "cogl-onscreen-private.h"
+#include "cogl-error-private.h"
+
+static const CoglWinsysEGLVtable _cogl_winsys_egl_vtable;
+
+static const CoglWinsysVtable *parent_vtable;
+
+typedef struct _CoglRendererMir
+{
+  MirConnection *mir_connection;
+} CoglRendererMir;
+
+typedef struct _CoglDisplayMir
+{
+  MirSurface *dummy_mir_surface;
+} CoglDisplayMir;
+
+typedef struct _CoglOnscreenMir
+{
+  MirSurface *mir_surface;
+  MirSurfaceState last_state;
+} CoglOnscreenMir;
+
+
+static MirPixelFormat
+_mir_connection_get_valid_format (MirConnection *connection)
+{
+  MirPixelFormat formats[mir_pixel_formats];
+  guint valid_formats;
+  guint f;
+
+  mir_connection_get_available_surface_formats(connection, formats,
+                                               mir_pixel_formats,
+                                               &valid_formats);
+
+  for (f = 0; f < valid_formats; f++)
+    {
+      switch (formats[f])
+        {
+          case mir_pixel_format_abgr_8888:
+          case mir_pixel_format_xbgr_8888:
+          case mir_pixel_format_argb_8888:
+          case mir_pixel_format_xrgb_8888:
+            return formats[f];
+          default:
+            continue;
+        }
+  }
+
+  return mir_pixel_format_invalid;
+}
+
+static void
+_cogl_winsys_renderer_disconnect (CoglRenderer *renderer)
+{
+  CoglRendererEGL *egl_renderer = renderer->winsys;
+  CoglRendererMir *mir_renderer = egl_renderer->platform;
+
+  if (egl_renderer->edpy)
+    eglTerminate (egl_renderer->edpy);
+
+  if (mir_connection_is_valid (mir_renderer->mir_connection))
+    mir_connection_release (mir_renderer->mir_connection);
+
+  g_slice_free (CoglRendererMir, egl_renderer->platform);
+  g_slice_free (CoglRendererEGL, egl_renderer);
+}
+
+static CoglBool
+_cogl_winsys_renderer_connect (CoglRenderer *renderer,
+                               CoglError **error)
+{
+  CoglRendererEGL *egl_renderer;
+  CoglRendererMir *mir_renderer;
+  MirEGLNativeDisplayType mir_native_dpy;
+
+  renderer->winsys = g_slice_new0 (CoglRendererEGL);
+  egl_renderer = renderer->winsys;
+  mir_renderer = g_slice_new0 (CoglRendererMir);
+  egl_renderer->platform = mir_renderer;
+
+  egl_renderer->platform_vtable = &_cogl_winsys_egl_vtable;
+
+  mir_renderer->mir_connection = mir_connect_sync (NULL, __PRETTY_FUNCTION__);
+  if (!mir_connection_is_valid (mir_renderer->mir_connection))
+    {
+      _cogl_set_error (error, COGL_WINSYS_ERROR,
+                       COGL_WINSYS_ERROR_INIT,
+                       "Failed to connect mir display");
+      goto error;
+    }
+
+  mir_native_dpy =
+    mir_connection_get_egl_native_display (mir_renderer->mir_connection);
+  egl_renderer->edpy =
+    eglGetDisplay (mir_native_dpy);
+
+  if (!_cogl_winsys_egl_renderer_connect_common (renderer, error))
+    goto error;
+
+  return TRUE;
+
+error:
+  _cogl_winsys_renderer_disconnect (renderer);
+  return FALSE;
+}
+
+static CoglBool
+_cogl_winsys_egl_display_setup (CoglDisplay *display,
+                                CoglError **error)
+{
+  CoglDisplayEGL *egl_display = display->winsys;
+  CoglDisplayMir *mir_display;
+
+  mir_display = g_slice_new0 (CoglDisplayMir);
+  egl_display->platform = mir_display;
+
+  return TRUE;
+}
+
+static void
+_cogl_winsys_egl_display_destroy (CoglDisplay *display)
+{
+  CoglDisplayEGL *egl_display = display->winsys;
+
+  g_slice_free (CoglDisplayMir, egl_display->platform);
+}
+
+static CoglBool
+make_dummy_surface (CoglDisplay *display,
+                    CoglError **error)
+{
+  CoglRenderer *renderer = display->renderer;
+  CoglRendererEGL *egl_renderer = renderer->winsys;
+  CoglRendererMir *mir_renderer = egl_renderer->platform;
+  CoglDisplayEGL *egl_display = display->winsys;
+  CoglDisplayMir *mir_display = egl_display->platform;
+  MirEGLNativeWindowType dummy_mir_egl_native_window;
+  MirSurfaceParameters surfaceparm;
+  const char *error_message;
+
+  surfaceparm.name = "CoglDummySurface";
+  surfaceparm.width = 1;
+  surfaceparm.height = 1;
+  surfaceparm.pixel_format = _mir_connection_get_valid_format (mir_renderer->mir_connection);
+  surfaceparm.buffer_usage = mir_buffer_usage_hardware;
+  surfaceparm.output_id = mir_display_output_id_invalid;
+
+  mir_display->dummy_mir_surface =
+    mir_connection_create_surface_sync (mir_renderer->mir_connection, &surfaceparm);
+  if (!mir_display->dummy_mir_surface)
+    {
+      error_message= "Failed to create a dummy mir surface";
+      goto fail;
+    }
+
+  dummy_mir_egl_native_window =
+    mir_surface_get_egl_native_window (mir_display->dummy_mir_surface);
+  if (!dummy_mir_egl_native_window)
+    {
+      error_message= "Failed to get a dummy mir native egl surface";
+      goto fail;
+    }
+
+  egl_display->dummy_surface =
+    eglCreateWindowSurface (egl_renderer->edpy,
+                            egl_display->egl_config,
+                            (EGLNativeWindowType) dummy_mir_egl_native_window,
+                            NULL);
+  if (egl_display->dummy_surface == EGL_NO_SURFACE)
+    {
+      error_message= "Unable to create dummy window surface";
+      goto fail;
+    }
+
+  return TRUE;
+
+ fail:
+  _cogl_set_error (error, COGL_WINSYS_ERROR,
+                   COGL_WINSYS_ERROR_CREATE_CONTEXT,
+                   "%s", error_message);
+
+  return FALSE;
+}
+
+static CoglBool
+_cogl_winsys_egl_context_created (CoglDisplay *display,
+                                  CoglError **error)
+{
+  CoglRenderer *renderer = display->renderer;
+  CoglRendererEGL *egl_renderer = renderer->winsys;
+  CoglDisplayEGL *egl_display = display->winsys;
+
+  if ((egl_renderer->private_features &
+       COGL_EGL_WINSYS_FEATURE_SURFACELESS_CONTEXT) == 0 &&
+      !make_dummy_surface(display, error))
+    return FALSE;
+
+  if (!_cogl_winsys_egl_make_current (display,
+                                      egl_display->dummy_surface,
+                                      egl_display->dummy_surface,
+                                      egl_display->egl_context))
+    {
+      _cogl_set_error (error,
+                       COGL_WINSYS_ERROR,
+                       COGL_WINSYS_ERROR_CREATE_CONTEXT,
+                       "%s",
+                       "Unable to eglMakeCurrent with dummy surface");
+    }
+
+  return TRUE;
+}
+
+static void
+_cogl_winsys_egl_cleanup_context (CoglDisplay *display)
+{
+  CoglRenderer *renderer = display->renderer;
+  CoglRendererEGL *egl_renderer = renderer->winsys;
+  CoglDisplayEGL *egl_display = display->winsys;
+  CoglDisplayMir *mir_display = egl_display->platform;
+
+  if (egl_display->dummy_surface != EGL_NO_SURFACE)
+    {
+      eglDestroySurface (egl_renderer->edpy, egl_display->dummy_surface);
+      egl_display->dummy_surface = EGL_NO_SURFACE;
+    }
+
+  if (mir_display->dummy_mir_surface)
+    {
+      mir_surface_release (mir_display->dummy_mir_surface, NULL, NULL);
+      mir_display->dummy_mir_surface = NULL;
+    }
+}
+
+static CoglBool
+_cogl_winsys_egl_context_init (CoglContext *context,
+                               CoglError **error)
+{
+  COGL_FLAGS_SET (context->features,
+                  COGL_FEATURE_ID_ONSCREEN_MULTIPLE, TRUE);
+  COGL_FLAGS_SET (context->winsys_features,
+                  COGL_WINSYS_FEATURE_MULTIPLE_ONSCREEN,
+                  TRUE);
+
+  return TRUE;
+}
+
+static CoglBool
+_cogl_winsys_egl_onscreen_init (CoglOnscreen *onscreen,
+                                EGLConfig egl_config,
+                                CoglError **error)
+{
+  CoglOnscreenEGL *egl_onscreen = onscreen->winsys;
+  CoglOnscreenMir *mir_onscreen;
+  CoglFramebuffer *framebuffer = COGL_FRAMEBUFFER (onscreen);
+  CoglContext *context = framebuffer->context;
+  CoglRenderer *renderer = context->display->renderer;
+  CoglRendererEGL *egl_renderer = renderer->winsys;
+  CoglRendererMir *mir_renderer = egl_renderer->platform;
+  MirEGLNativeWindowType mir_egl_native_window;
+  MirSurfaceParameters surfaceparm;
+
+  mir_onscreen = g_slice_new0 (CoglOnscreenMir);
+  egl_onscreen->platform = mir_onscreen;
+
+  surfaceparm.name = "CoglSurface";
+  surfaceparm.width = cogl_framebuffer_get_width (framebuffer);
+  surfaceparm.height = cogl_framebuffer_get_height (framebuffer);
+  surfaceparm.pixel_format = _mir_connection_get_valid_format (mir_renderer->mir_connection);
+  surfaceparm.buffer_usage = mir_buffer_usage_hardware;
+  surfaceparm.output_id = mir_display_output_id_invalid;
+
+  mir_onscreen->mir_surface =
+    mir_connection_create_surface_sync (mir_renderer->mir_connection, &surfaceparm);
+
+  mir_onscreen->last_state = mir_surface_get_state (mir_onscreen->mir_surface);
+
+  if (!mir_surface_is_valid (mir_onscreen->mir_surface))
+    {
+      _cogl_set_error (error, COGL_WINSYS_ERROR,
+                       COGL_WINSYS_ERROR_CREATE_ONSCREEN,
+                      "Error while creating mir surface for CoglOnscreen");
+      return FALSE;
+    }
+
+  mir_egl_native_window = mir_surface_get_egl_native_window (mir_onscreen->mir_surface);
+  if (!mir_egl_native_window)
+    {
+      _cogl_set_error (error, COGL_WINSYS_ERROR,
+                       COGL_WINSYS_ERROR_CREATE_ONSCREEN,
+                       "Error while getting mir egl native window "
+                       "for CoglOnscreen");
+      return FALSE;
+    }
+
+  egl_onscreen->egl_surface =
+    eglCreateWindowSurface (egl_renderer->edpy,
+                            egl_config,
+                            (EGLNativeWindowType) mir_egl_native_window,
+                            NULL);
+
+  return TRUE;
+}
+
+static void
+_cogl_winsys_egl_onscreen_deinit (CoglOnscreen *onscreen)
+{
+  CoglOnscreenEGL *egl_onscreen = onscreen->winsys;
+  CoglOnscreenMir *mir_onscreen = egl_onscreen->platform;
+
+  if (mir_onscreen->mir_surface)
+    {
+      mir_surface_release (mir_onscreen->mir_surface, NULL, NULL);
+      mir_onscreen->mir_surface = NULL;
+    }
+
+  mir_onscreen->last_state = mir_surface_state_unknown;
+
+  g_slice_free (CoglOnscreenMir, mir_onscreen);
+}
+
+static void
+_cogl_winsys_onscreen_set_visibility (CoglOnscreen *onscreen,
+                                      CoglBool visibility)
+{
+  CoglOnscreenEGL *egl_onscreen = onscreen->winsys;
+  CoglOnscreenMir *mir_onscreen = egl_onscreen->platform;
+  MirSurfaceState new_state, current_state;
+
+  current_state = mir_surface_get_state (mir_onscreen->mir_surface);
+
+  if ((visibility && current_state != mir_surface_state_minimized) ||
+      (!visibility && current_state == mir_surface_state_minimized))
+    {
+      return;
+    }
+
+  if (!visibility)
+    {
+      new_state = mir_surface_state_minimized;
+      mir_onscreen->last_state = current_state;
+    }
+  else
+    {
+      new_state = mir_onscreen->last_state;
+    }
+
+  mir_surface_set_state (mir_onscreen->mir_surface, new_state);
+}
+
+MirSurface *
+cogl_mir_onscreen_get_surface (CoglOnscreen *onscreen)
+{
+  CoglOnscreenEGL *egl_onscreen;
+  CoglOnscreenMir *mir_onscreen;
+
+  cogl_framebuffer_allocate (COGL_FRAMEBUFFER (onscreen), NULL);
+
+  egl_onscreen = onscreen->winsys;
+  mir_onscreen = egl_onscreen->platform;
+
+  return mir_onscreen->mir_surface;
+}
+
+static const CoglWinsysEGLVtable
+_cogl_winsys_egl_vtable =
+  {
+    .display_setup = _cogl_winsys_egl_display_setup,
+    .display_destroy = _cogl_winsys_egl_display_destroy,
+    .context_created = _cogl_winsys_egl_context_created,
+    .cleanup_context = _cogl_winsys_egl_cleanup_context,
+    .context_init = _cogl_winsys_egl_context_init,
+    .onscreen_init = _cogl_winsys_egl_onscreen_init,
+    .onscreen_deinit = _cogl_winsys_egl_onscreen_deinit
+  };
+
+const CoglWinsysVtable *
+_cogl_winsys_egl_mir_get_vtable (void)
+{
+  static CoglBool vtable_inited = FALSE;
+  static CoglWinsysVtable vtable;
+
+  if (!vtable_inited)
+    {
+      /* The EGL_MIR winsys is a subclass of the EGL winsys so we
+         start by copying its vtable */
+
+      parent_vtable = _cogl_winsys_egl_get_vtable ();
+      vtable = *parent_vtable;
+
+      vtable.id = COGL_WINSYS_ID_EGL_MIR;
+      vtable.name = "EGL_MIR";
+
+      vtable.renderer_connect = _cogl_winsys_renderer_connect;
+      vtable.renderer_disconnect = _cogl_winsys_renderer_disconnect;
+
+      vtable.onscreen_set_visibility =
+        _cogl_winsys_onscreen_set_visibility;
+
+      vtable_inited = TRUE;
+    }
+
+  return &vtable;
+}

configure.ac

@@ -97,6 +97,7 @@ m4_define([xrandr_req_version],         [1.2])
 m4_define([cairo_req_version],          [1.10])
 m4_define([wayland_req_version],        [1.0.0])
 m4_define([wayland_server_req_version], [1.1.90])
+m4_define([mirclient_req_version],      [0.9.0])
 
 dnl These variables get copied into the generated README
 AC_SUBST([GLIB_REQ_VERSION], [glib_req_version])
@@ -110,6 +111,7 @@ AC_SUBST([GI_REQ_VERSION], [gi_req_version])
 AC_SUBST([UPROF_REQ_VERSION], [uprof_req_version])
 AC_SUBST([WAYLAND_REQ_VERSION], [wayland_req_version])
 AC_SUBST([WAYLAND_SERVER_REQ_VERSION], [wayland_server_req_version])
+AC_SUBST([MIRCLIENT_REQ_VERSION], [mirclient_req_version])
 
 # Save this value here, since automake will set cflags later and we
 # want to know if the user specified custom cflags or not.
@@ -1151,6 +1153,29 @@ AS_IF([test "x$enable_android_egl_platform" = "xyes"],
 AM_CONDITIONAL(SUPPORT_EGL_PLATFORM_ANDROID,
                [test "x$enable_android_egl_platform" = "xyes"])
 
+
+dnl Mir EGL platform
+AC_ARG_ENABLE(
+  [mir-egl-platform],
+  [AC_HELP_STRING([--enable-mir-egl-platform=@<:@no/yes@:>@], [Enable support for the Mir egl platform @<:@default=no@:>@])],
+  [],
+  enable_mir_egl_platform=no
+)
+AS_IF([test "x$enable_mir_egl_platform" = "xyes"],
+      [
+        EGL_PLATFORM_COUNT=$((EGL_PLATFORM_COUNT+1))
+        NEED_EGL=yes
+        EGL_PLATFORMS="$EGL_PLATFORMS mir"
+
+        PKG_CHECK_MODULES(MIR_CLIENT,
+                          [mirclient >= mirclient_req_version])
+        COGL_PKG_REQUIRES="$COGL_PKG_REQUIRES mirclient >= mirclient_req_version"
+
+        COGL_DEFINES_SYMBOLS="$COGL_DEFINES_SYMBOLS COGL_HAS_EGL_PLATFORM_MIR_SUPPORT"
+      ])
+AM_CONDITIONAL(SUPPORT_EGL_PLATFORM_MIR,
+               [test "x$enable_mir_egl_platform" = "xyes"])
+
 dnl This should go last, since it's the default fallback and we need
 dnl to check the value of $EGL_PLATFORM_COUNT here.
 AC_ARG_ENABLE(

examples/cogl-info.c

@@ -147,6 +147,8 @@ get_winsys_name_for_id (CoglWinsysID winsys_id)
       return "EGL + KMS platform";
     case COGL_WINSYS_ID_EGL_ANDROID:
       return "EGL + Android platform";
+    case COGL_WINSYS_ID_EGL_MIR:
+      return "EGL + Mir platform";
     case COGL_WINSYS_ID_WGL:
       return "EGL + Windows WGL platform";
     case COGL_WINSYS_ID_SDL: