1 /*
2 * Mesa 3-D graphics library
3 * Version: 7.12
4 *
5 * Copyright (C) 2011 LunarG Inc.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
22 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
23 * DEALINGS IN THE SOFTWARE.
24 *
25 * Authors:
26 * Chia-I Wu <olv@lunarg.com>
27 */
28
29 /**
30 * For NULL window system,
31 *
32 * - the only valid native display is EGL_DEFAULT_DISPLAY
33 * - there is no window or pixmap
34 */
35
36 #include "util/u_memory.h"
37 #include "null/null_sw_winsys.h"
38 #include "common/native.h"
39
40 struct null_display {
41 struct native_display base;
42
43 const struct native_event_handler *event_handler;
44
45 struct native_config *configs;
46 int num_configs;
47 };
48
49 static INLINE struct null_display *
null_display(const struct native_display * ndpy)50 null_display(const struct native_display *ndpy)
51 {
52 return (struct null_display *) ndpy;
53 }
54
55 static const struct native_config **
null_display_get_configs(struct native_display * ndpy,int * num_configs)56 null_display_get_configs(struct native_display *ndpy, int *num_configs)
57 {
58 struct null_display *null = null_display(ndpy);
59 const struct native_config **configs;
60 int i;
61
62 configs = MALLOC(sizeof(*configs) * null->num_configs);
63 if (configs) {
64 for (i = 0; i < null->num_configs; i++)
65 configs[i] = &null->configs[i];
66 if (num_configs)
67 *num_configs = null->num_configs;
68 }
69
70 return configs;
71 }
72
73 static int
null_display_get_param(struct native_display * ndpy,enum native_param_type param)74 null_display_get_param(struct native_display *ndpy,
75 enum native_param_type param)
76 {
77 return 0;
78 }
79
80 static void
null_display_destroy(struct native_display * ndpy)81 null_display_destroy(struct native_display *ndpy)
82 {
83 struct null_display *null = null_display(ndpy);
84
85 FREE(null->configs);
86 ndpy_uninit(&null->base);
87 FREE(null);
88 }
89
90 static boolean
null_display_init_config(struct native_display * ndpy)91 null_display_init_config(struct native_display *ndpy)
92 {
93 const enum pipe_format color_formats[] = {
94 PIPE_FORMAT_B8G8R8A8_UNORM,
95 PIPE_FORMAT_B8G8R8X8_UNORM,
96 PIPE_FORMAT_B5G6R5_UNORM,
97 PIPE_FORMAT_NONE
98 };
99 struct null_display *null = null_display(ndpy);
100 int i;
101
102 null->configs = CALLOC(Elements(color_formats) - 1, sizeof(*null->configs));
103 if (!null->configs)
104 return FALSE;
105
106 /* add configs */
107 for (i = 0; color_formats[i] != PIPE_FORMAT_NONE; i++) {
108 if (null->base.screen->is_format_supported(null->base.screen,
109 color_formats[i], PIPE_TEXTURE_2D, 0,
110 PIPE_BIND_RENDER_TARGET)) {
111 struct native_config *nconf = &null->configs[null->num_configs];
112
113 nconf->color_format = color_formats[i];
114 nconf->buffer_mask = 1 << NATIVE_ATTACHMENT_BACK_LEFT;
115 null->num_configs++;
116 }
117 }
118
119 return TRUE;
120 }
121
122 static boolean
null_display_init_screen(struct native_display * ndpy)123 null_display_init_screen(struct native_display *ndpy)
124 {
125 struct null_display *null = null_display(ndpy);
126 struct sw_winsys *ws;
127
128 ws = null_sw_create();
129 if (!ws)
130 return FALSE;
131
132 null->base.screen = null->event_handler->new_sw_screen(&null->base, ws);
133 if (!null->base.screen) {
134 if (ws->destroy)
135 ws->destroy(ws);
136 return FALSE;
137 }
138
139 if (!null_display_init_config(&null->base)) {
140 ndpy_uninit(&null->base);
141 return FALSE;
142 }
143
144 return TRUE;
145 }
146
147 static struct native_display *
null_display_create(const struct native_event_handler * event_handler)148 null_display_create(const struct native_event_handler *event_handler)
149 {
150 struct null_display *null;
151
152 null = CALLOC_STRUCT(null_display);
153 if (!null)
154 return NULL;
155
156 null->event_handler = event_handler;
157
158 null->base.init_screen = null_display_init_screen;
159 null->base.destroy = null_display_destroy;
160 null->base.get_param = null_display_get_param;
161 null->base.get_configs = null_display_get_configs;
162
163 return &null->base;
164 }
165
166 static const struct native_event_handler *null_event_handler;
167
168 static struct native_display *
native_create_display(void * dpy,boolean use_sw)169 native_create_display(void *dpy, boolean use_sw)
170 {
171 struct native_display *ndpy = NULL;
172
173 /* the only valid display is NULL */
174 if (!dpy)
175 ndpy = null_display_create(null_event_handler);
176
177 return ndpy;
178 }
179
180 static const struct native_platform null_platform = {
181 "NULL", /* name */
182 native_create_display
183 };
184
185 const struct native_platform *
native_get_null_platform(const struct native_event_handler * event_handler)186 native_get_null_platform(const struct native_event_handler *event_handler)
187 {
188 null_event_handler = event_handler;
189 return &null_platform;
190 }
191