Add temporary cogl-clutter.h to aid splitting out Cogl

This gives us a way to clearly track the internal Cogl API that Clutter
depends on. The aim is to split Cogl out from Clutter into a standalone
3D graphics API and eventually we want to get rid of any private
interfaces for Clutter so its useful to have a handle on that task.
Actually it's not as bad as I was expecting though.

cogl/Makefile.am

@@ -78,6 +78,7 @@ cogl_public_h = \
 	$(srcdir)/cogl-attribute.h 		\
 	$(srcdir)/cogl-primitive.h 		\
 	$(srcdir)/cogl-clip-state.h		\
+	$(srcdir)/cogl-clutter.h       		\
 	$(srcdir)/cogl.h			\
 	$(NULL)
 
@@ -273,6 +274,7 @@ cogl_sources_c = \
 	$(srcdir)/cogl-gtype-private.h                  \
 	$(srcdir)/cogl-point-in-poly-private.h       	\
 	$(srcdir)/cogl-point-in-poly.c       		\
+	$(srcdir)/cogl-clutter.c       			\
 	$(NULL)
 
 if SUPPORT_XLIB

cogl/cogl-clutter.c

@@ -0,0 +1,59 @@
+/*
+ * Cogl
+ *
+ * An object oriented GL/GLES Abstraction/Utility Layer
+ *
+ * Copyright (C) 2011 Intel Corporation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * Authors:
+ *   Robert Bragg <robert@linux.intel.com>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <glib.h>
+
+#include "cogl.h"
+#include "cogl-types.h"
+#include "cogl-private.h"
+#include "cogl-context-private.h"
+#include "cogl-winsys-private.h"
+#include "cogl-framebuffer-private.h"
+
+gboolean
+cogl_clutter_check_extension (const char *name, const char *ext)
+{
+  return _cogl_check_extension (name, ext);
+}
+
+void
+cogl_onscreen_clutter_backend_set_size (int width, int height)
+{
+  CoglFramebuffer *framebuffer;
+
+  _COGL_GET_CONTEXT (ctx, NO_RETVAL);
+
+  if (!ctx->stub_winsys)
+    return;
+
+  framebuffer = COGL_FRAMEBUFFER (ctx->window_buffer);
+
+  _cogl_framebuffer_winsys_update_size (framebuffer, width, height);
+}

cogl/cogl-clutter.h

@@ -0,0 +1,47 @@
+/*
+ * Cogl
+ *
+ * An object oriented GL/GLES Abstraction/Utility Layer
+ *
+ * Copyright (C) 2011 Intel Corporation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#if !defined(__COGL_H_INSIDE__) && !defined(CLUTTER_COMPILATION)
+#error "Only <cogl/cogl.h> can be included directly."
+#endif
+
+#ifndef __COGL_CLUTTER_H__
+#define __COGL_CLUTTER_H__
+
+#ifdef COGL_HAS_XLIB
+#include <X11/Xutil.h>
+#endif
+
+G_BEGIN_DECLS
+
+#define cogl_clutter_check_extension cogl_clutter_check_extension_CLUTTER
+gboolean
+cogl_clutter_check_extension (const char *name, const char *ext);
+
+#define cogl_onscreen_clutter_backend_set_size cogl_onscreen_clutter_backend_set_size_CLUTTER
+void
+cogl_onscreen_clutter_backend_set_size (int width, int height);
+
+G_END_DECLS
+
+#endif /* __COGL_CLUTTER_H__ */

cogl/cogl-framebuffer-private.h

@@ -113,6 +113,10 @@ typedef struct _CoglOnscreen
 void
 _cogl_framebuffer_state_init (void);
 
+void
+_cogl_framebuffer_winsys_update_size (CoglFramebuffer *framebuffer,
+                                      int width, int height);
+
 void
 _cogl_clear4f (unsigned long buffers,
                float red,

cogl/cogl-framebuffer.c

@@ -989,13 +989,10 @@ _cogl_onscreen_free (CoglOnscreen *onscreen)
 }
 
 void
-_cogl_onscreen_clutter_backend_set_size (int width, int height)
+_cogl_framebuffer_winsys_update_size (CoglFramebuffer *framebuffer,
+                                      int width, int height)
 {
-  CoglFramebuffer *framebuffer;
-
-  _COGL_GET_CONTEXT (ctx, NO_RETVAL);
-
-  framebuffer = COGL_FRAMEBUFFER (ctx->window_buffer);
+  CoglContext *ctx = framebuffer->context;
 
   if (framebuffer->width == width && framebuffer->height == height)
     return;

cogl/cogl-private.h

@@ -26,6 +26,9 @@
 
 G_BEGIN_DECLS
 
+gboolean
+_cogl_check_extension (const char *name, const char *ext);
+
 void
 _cogl_clear (const CoglColor *color, unsigned long buffers);
 

cogl/cogl.h

@@ -1277,9 +1277,6 @@ _cogl_check_driver_valid (GError **error);
 GQuark
 _cogl_driver_error_quark (void);
 
-void
-_cogl_onscreen_clutter_backend_set_size (int width, int height);
-
 #ifdef COGL_ENABLE_EXPERIMENTAL_API
 #define cogl_get_draw_framebuffer cogl_get_draw_framebuffer_EXP
 CoglFramebuffer *