1 /**************************************************************************
3 * Copyright 2009 VMware, Inc.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
28 #include "main/glheader.h"
29 #include "st_context.h"
30 #include "st_cb_fbo.h"
31 #include "st_cb_viewport.h"
33 #include "pipe/p_state.h"
34 #include "pipe/p_defines.h"
35 #include "util/u_atomic.h"
38 static void st_viewport(struct gl_context
*ctx
)
40 struct st_context
*st
= ctx
->st
;
41 struct st_framebuffer
*stdraw
;
42 struct st_framebuffer
*stread
;
44 if (!st
->invalidate_on_gl_viewport
)
48 * Normally we'd want the state tracker manager to mark the drawables
49 * invalid only when needed. This will force the state tracker manager
50 * to revalidate the drawable, rather than just update the context with
51 * the latest cached drawable info.
54 stdraw
= st_ws_framebuffer(st
->ctx
->DrawBuffer
);
55 stread
= st_ws_framebuffer(st
->ctx
->ReadBuffer
);
58 stdraw
->iface_stamp
= p_atomic_read(&stdraw
->iface
->stamp
) - 1;
59 if (stread
&& stread
!= stdraw
)
60 stread
->iface_stamp
= p_atomic_read(&stread
->iface
->stamp
) - 1;
63 void st_init_viewport_functions(struct dd_function_table
*functions
)
65 functions
->Viewport
= st_viewport
;