1 /**************************************************************************
2 *
3 * Copyright 2009 VMware, Inc.
4 * All Rights Reserved.
5 *
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:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
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.
25 *
26 **************************************************************************/
27
28 #include "main/glheader.h"
29 #include "st_context.h"
30 #include "st_cb_viewport.h"
31
32 #include "pipe/p_state.h"
33 #include "pipe/p_defines.h"
34 #include "util/u_atomic.h"
35
36 /**
37 * Cast wrapper to convert a struct gl_framebuffer to an st_framebuffer.
38 * Return NULL if the struct gl_framebuffer is a user-created framebuffer.
39 * We'll only return non-null for window system framebuffers.
40 * Note that this function may fail.
41 */
42 static inline struct st_framebuffer *
st_ws_framebuffer(struct gl_framebuffer * fb)43 st_ws_framebuffer(struct gl_framebuffer *fb)
44 {
45 /* FBO cannot be casted. See st_new_framebuffer */
46 if (fb && _mesa_is_winsys_fbo(fb))
47 return (struct st_framebuffer *) fb;
48 return NULL;
49 }
50
st_viewport(struct gl_context * ctx)51 static void st_viewport(struct gl_context *ctx)
52 {
53 struct st_context *st = ctx->st;
54 struct st_framebuffer *stdraw;
55 struct st_framebuffer *stread;
56
57 if (!st->invalidate_on_gl_viewport)
58 return;
59
60 /*
61 * Normally we'd want the state tracker manager to mark the drawables
62 * invalid only when needed. This will force the state tracker manager
63 * to revalidate the drawable, rather than just update the context with
64 * the latest cached drawable info.
65 */
66
67 stdraw = st_ws_framebuffer(st->ctx->DrawBuffer);
68 stread = st_ws_framebuffer(st->ctx->ReadBuffer);
69
70 if (stdraw && stdraw->iface)
71 stdraw->iface_stamp = p_atomic_read(&stdraw->iface->stamp) - 1;
72 if (stread && stread != stdraw && stread->iface)
73 stread->iface_stamp = p_atomic_read(&stread->iface->stamp) - 1;
74 }
75
st_init_viewport_functions(struct dd_function_table * functions)76 void st_init_viewport_functions(struct dd_function_table *functions)
77 {
78 functions->Viewport = st_viewport;
79 }
80