gallium: add winsys interface for viewport changes to support DRI2

src/gallium/include/pipe/internal/p_winsys_screen.h

@@ -67,6 +67,11 @@ struct pipe_winsys
    /** Returns name of this winsys interface */
    const char *(*get_name)( struct pipe_winsys *ws );
 
+   /**
+    * Do any special operations to ensure buffer size is correct
+    */
+   void (*update_buffer)( struct pipe_winsys *ws,
+                          void *context_private );
    /**
     * Do any special operations to ensure frontbuffer contents are
     * displayed, eg copy fake frontbuffer.

src/mesa/sources.mak

@@ -201,6 +201,7 @@ STATETRACKER_SOURCES = \
 	state_tracker/st_cb_readpixels.c \
 	state_tracker/st_cb_strings.c \
 	state_tracker/st_cb_texture.c \
+	state_tracker/st_cb_viewport.c \
 	state_tracker/st_api.c \
 	state_tracker/st_context.c \
 	state_tracker/st_debug.c \

src/mesa/state_tracker/st_cb_viewport.c

@@ -0,0 +1,51 @@
+/**************************************************************************
+ * 
+ * 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 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 "main/glheader.h"
+#include "st_context.h"
+#include "st_public.h"
+#include "st_cb_viewport.h"
+
+#include "pipe/p_context.h"
+#include "pipe/p_inlines.h"
+#include "pipe/p_state.h"
+#include "pipe/p_defines.h"
+
+static void st_viewport(GLcontext * ctx, GLint x, GLint y,
+                        GLsizei width, GLsizei height)
+{
+   struct st_context *st = ctx->st;
+
+   if (st->pipe->winsys)
+      st->pipe->winsys->update_buffer( st->pipe->winsys,
+                                       st->pipe->priv );
+}
+
+void st_init_viewport_functions(struct dd_function_table *functions)
+{
+   functions->Viewport = st_viewport;
+}

src/mesa/state_tracker/st_cb_viewport.h

@@ -0,0 +1,29 @@
+/**************************************************************************
+ * 
+ * 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 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.
+ * 
+ **************************************************************************/
+
+extern void
+st_init_viewport_functions(struct dd_function_table *functions);

src/mesa/state_tracker/st_context.c

@@ -320,6 +320,7 @@ void st_init_driver_functions(struct dd_function_table *functions)
    st_init_texture_functions(functions);
    st_init_flush_functions(functions);
    st_init_string_functions(functions);
+   st_init_viewport_functions(functions);
 
    functions->UpdateState = st_invalidate_state;
 }