1/**************************************************************************
2 *
3 * Copyright 2010 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 SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
18 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
19 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
20 * USE OR OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * The above copyright notice and this permission notice (including the
23 * next paragraph) shall be included in all copies or substantial portions
24 * of the Software.
25 *
26 **************************************************************************/
27
28/**
29 * @file
30 * Null software rasterizer winsys.
31 *
32 * There is no present support. Framebuffer data needs to be obtained via
33 * transfers.
34 *
35 * @author Jose Fonseca
36 */
37
38#include <stdio.h>
39
40#include "pipe/p_format.h"
41#include "util/u_memory.h"
42#include "frontend/sw_winsys.h"
43#include "null_sw_winsys.h"
44
45
46static bool
47null_sw_is_displaytarget_format_supported(struct sw_winsys *ws,
48                                          unsigned tex_usage,
49                                          enum pipe_format format )
50{
51   return false;
52}
53
54
55static void *
56null_sw_displaytarget_map(struct sw_winsys *ws,
57                          struct sw_displaytarget *dt,
58                          unsigned flags )
59{
60   assert(0);
61   return NULL;
62}
63
64
65static void
66null_sw_displaytarget_unmap(struct sw_winsys *ws,
67                            struct sw_displaytarget *dt )
68{
69   assert(0);
70}
71
72
73static void
74null_sw_displaytarget_destroy(struct sw_winsys *winsys,
75                              struct sw_displaytarget *dt)
76{
77   assert(0);
78}
79
80
81static struct sw_displaytarget *
82null_sw_displaytarget_create(struct sw_winsys *winsys,
83                             unsigned tex_usage,
84                             enum pipe_format format,
85                             unsigned width, unsigned height,
86                             unsigned alignment,
87                             const void *front_private,
88                             unsigned *stride)
89{
90   fprintf(stderr, "null_sw_displaytarget_create() returning NULL\n");
91   return NULL;
92}
93
94
95static struct sw_displaytarget *
96null_sw_displaytarget_from_handle(struct sw_winsys *winsys,
97                                  const struct pipe_resource *templat,
98                                  struct winsys_handle *whandle,
99                                  unsigned *stride)
100{
101   return NULL;
102}
103
104
105static bool
106null_sw_displaytarget_get_handle(struct sw_winsys *winsys,
107                                 struct sw_displaytarget *dt,
108                                 struct winsys_handle *whandle)
109{
110   assert(0);
111   return false;
112}
113
114
115static void
116null_sw_displaytarget_display(struct sw_winsys *winsys,
117                              struct sw_displaytarget *dt,
118                              void *context_private,
119                              struct pipe_box *box)
120{
121   assert(0);
122}
123
124
125static void
126null_sw_destroy(struct sw_winsys *winsys)
127{
128   FREE(winsys);
129}
130
131
132struct sw_winsys *
133null_sw_create(void)
134{
135   static struct sw_winsys *winsys;
136
137   winsys = CALLOC_STRUCT(sw_winsys);
138   if (!winsys)
139      return NULL;
140
141   winsys->destroy = null_sw_destroy;
142   winsys->is_displaytarget_format_supported = null_sw_is_displaytarget_format_supported;
143   winsys->displaytarget_create = null_sw_displaytarget_create;
144   winsys->displaytarget_from_handle = null_sw_displaytarget_from_handle;
145   winsys->displaytarget_get_handle = null_sw_displaytarget_get_handle;
146   winsys->displaytarget_map = null_sw_displaytarget_map;
147   winsys->displaytarget_unmap = null_sw_displaytarget_unmap;
148   winsys->displaytarget_display = null_sw_displaytarget_display;
149   winsys->displaytarget_destroy = null_sw_displaytarget_destroy;
150
151   return winsys;
152}
153