targets/libgl-xlib: add code to inject trace and identity layers

Finally we can inject layers for debug, trace and "other" with
relative ease between state-tracker and driver.

src/gallium/drivers/trace/tr_drm.c

@@ -33,6 +33,7 @@
 #include "tr_context.h"
 #include "tr_buffer.h"
 #include "tr_texture.h"
+#include "tr_public.h"
 
 struct trace_drm_api
 {

src/gallium/drivers/trace/tr_public.h

@@ -0,0 +1,37 @@
+/**************************************************************************
+ *
+ * Copyright 2009 VMware, Inc.
+ * All Rights Reserved.
+ *
+ * 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, sub license, 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 (including the
+ * next paragraph) 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS 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 TR_PUBLIC_H
+#define TR_PUBLIC_H
+
+struct pipe_screen;
+struct pipe_context;
+
+struct pipe_screen *
+trace_screen_create(struct pipe_screen *screen);
+
+#endif /* TR_PUBLIC_H */

src/gallium/drivers/trace/tr_screen.h

@@ -99,9 +99,6 @@ trace_enabled(void);
 struct trace_screen *
 trace_screen(struct pipe_screen *screen);
 
-struct pipe_screen *
-trace_screen_create(struct pipe_screen *screen);
-
 void
 trace_screen_user_buffer_update(struct pipe_screen *screen,
                                 struct pipe_buffer *buffer);

src/gallium/state_trackers/glx/xlib/xm_api.c

@@ -63,10 +63,6 @@
 #include "pipe/p_screen.h"
 #include "pipe/p_context.h"
 
-#include "trace/tr_screen.h"
-#include "trace/tr_context.h"
-#include "trace/tr_texture.h"
-
 #include "xm_winsys.h"
 #include <GL/glx.h>
 
@@ -87,7 +83,6 @@ void xmesa_set_driver( const struct xm_driver *templ )
  */
 pipe_mutex _xmesa_lock;
 
-static struct pipe_screen *_screen = NULL;
 static struct pipe_screen *screen = NULL;
 
 
@@ -709,8 +704,7 @@ xmesa_init( Display *display )
    static GLboolean firstTime = GL_TRUE;
    if (firstTime) {
       pipe_mutex_init(_xmesa_lock);
-      _screen = driver.create_pipe_screen( display );
-      screen = trace_screen_create( _screen );
+      screen = driver.create_pipe_screen( display );
       firstTime = GL_FALSE;
    }
 }

src/gallium/targets/libgl-xlib/Makefile

@@ -39,6 +39,8 @@ LIBS = \
 	$(GALLIUM_DRIVERS) \
 	$(TOP)/src/gallium/state_trackers/glx/xlib/libxlib.a \
 	$(TOP)/src/gallium/winsys/xlib/libws_xlib.a \
+	$(TOP)/src/gallium/drivers/trace/libtrace.a \
+	$(TOP)/src/gallium/drivers/identity/libidentity.a \
 	$(TOP)/src/mesa/libglapi.a \
 	$(TOP)/src/mesa/libmesagallium.a \
 	$(GALLIUM_AUXILIARIES) \

src/gallium/targets/libgl-xlib/xlib.c

@@ -36,8 +36,11 @@
 #include "util/u_debug.h"
 #include "softpipe/sp_public.h"
 #include "llvmpipe/lp_public.h"
+#include "identity/id_public.h"
+#include "trace/tr_public.h"
 #include "cell/ppu/cell_public.h"
 
+
 /* advertise OpenGL support */
 PUBLIC const int st_api_OpenGL = 1;
 
@@ -46,7 +49,7 @@ static struct pipe_screen *
 create_screen( struct sw_winsys *winsys )
 {
 #if defined(GALLIUM_CELL)
-   if (!getenv("GALLIUM_NOCELL")) 
+   if (!debug_get_bool_option("GALLIUM_NOCELL", FALSE)) 
       return cell_create_screen( winsys );
 #endif
 
@@ -73,6 +76,17 @@ xlib_create_screen( Display *display )
    if (screen == NULL)
       goto fail;
 
+   /* Finally we have somewhere to inject layers into the stack in a
+    * clean fashion:
+    */
+   if (debug_get_bool_option("GALLIUM_WRAP", FALSE)) {
+      screen = identity_screen_create(screen);
+   }
+
+   if (debug_get_bool_option("GALLIUM_TRACE", FALSE)) {
+      screen = trace_screen_create( screen );
+   }
+
    return screen;
 
 fail: