wgl: Expose pipe_screen/pipe_context via an extension.

src/gallium/state_trackers/wgl/SConscript

@@ -29,6 +29,7 @@ if env['platform'] in ['windows']:
         'shared/stw_extensionsstring.c',
         'shared/stw_extswapinterval.c',
         'shared/stw_getprocaddress.c',
+        'shared/stw_extgallium.c',
         'shared/stw_arbpixelformat.c',
         'shared/stw_tls.c',
     ]

src/gallium/state_trackers/wgl/shared/stw_extgallium.c

@@ -0,0 +1,79 @@
+/**************************************************************************
+ *
+ * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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 TUNGSTEN GRAPHICS 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.
+ *
+ **************************************************************************/
+
+
+#include "pipe/p_screen.h"
+#include "stw_public.h"
+#include "stw_device.h"
+#include "stw_winsys.h"
+
+#ifdef DEBUG
+#include "trace/tr_screen.h"
+#include "trace/tr_context.h"
+#endif
+
+
+struct pipe_screen * APIENTRY
+wglGetGalliumScreenMESA(void)
+{
+   return stw_dev ? stw_dev->screen : NULL;
+}
+
+
+/* XXX: Unify with stw_create_layer_context */
+struct pipe_context * APIENTRY
+wglCreateGalliumContextMESA(void)
+{
+   struct pipe_screen *screen = NULL;
+   struct pipe_context *pipe = NULL;
+
+   if(!stw_dev)
+      return NULL;
+
+   screen = stw_dev->screen;
+
+#ifdef DEBUG
+   /* Unwrap screen */
+   if(stw_dev->trace_running)
+      screen = trace_screen(screen)->screen;
+#endif
+
+   pipe = stw_dev->stw_winsys->create_context( screen );
+   if (pipe == NULL)
+      goto no_pipe;
+
+#ifdef DEBUG
+   /* Wrap context */
+   if(stw_dev->trace_running)
+      pipe = trace_context_create(stw_dev->screen, pipe);
+#endif
+
+   return pipe;
+
+no_pipe:
+   return NULL;
+}

src/gallium/state_trackers/wgl/shared/stw_extgallium.h

@@ -0,0 +1,47 @@
+/**************************************************************************
+ *
+ * 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 STW_EXTGALLIUM_H_
+#define STW_EXTGALLIUM_H_
+
+
+#include <windows.h>
+
+
+struct pipe_screen;
+struct pipe_context;
+
+
+struct pipe_screen * APIENTRY
+wglGetGalliumScreenMESA(void);
+
+
+struct pipe_context * APIENTRY
+wglCreateGalliumContextMESA(void);
+
+
+#endif /* STW_EXTGALLIUM_H_ */

src/gallium/state_trackers/wgl/shared/stw_getprocaddress.c

@@ -34,6 +34,7 @@
 
 #include "glapi/glapi.h"
 #include "stw_public.h"
+#include "stw_extgallium.h"
 
 struct stw_extension_entry
 {
@@ -60,6 +61,10 @@ static const struct stw_extension_entry stw_extension_entries[] = {
    STW_EXTENSION_ENTRY( wglGetSwapIntervalEXT ),
    STW_EXTENSION_ENTRY( wglSwapIntervalEXT ),
 
+   /* WGL_EXT_gallium ? */
+   STW_EXTENSION_ENTRY( wglGetGalliumScreenMESA ),
+   STW_EXTENSION_ENTRY( wglCreateGalliumContextMESA ),
+
    { NULL, NULL }
 };
 
@@ -75,7 +80,7 @@ stw_get_proc_address(
             return entry->proc;
 
    if (lpszProc[0] == 'g' && lpszProc[1] == 'l')
-        return (PROC) _glapi_get_proc_address( lpszProc );
+      return (PROC) _glapi_get_proc_address( lpszProc );
 
    return NULL;
 }