1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
|
#include <assert.h>
#include <stdlib.h>
#include "til_fb.h"
#include "til_settings.h"
#include "til_util.h"
/* dummy mem_fb backend; render to anonymous memory */
/* useful for testing/debugging, and benchmarking systems even if headless */
typedef struct mem_fb_page_t mem_fb_page_t;
struct mem_fb_page_t {
void *unused;
uint32_t buf[];
};
typedef struct mem_fb_setup_t {
til_setup_t til_setup;
unsigned width, height;
} mem_fb_setup_t;
typedef struct mem_fb_t {
mem_fb_setup_t setup;
} mem_fb_t;
static int mem_fb_setup(const til_settings_t *settings, til_setting_t **res_setting, const til_setting_desc_t **res_desc, til_setup_t **res_setup)
{
const char *size;
int r;
r = til_settings_get_and_describe_value(settings,
&(til_setting_desc_t){
.name = "Virtual window size",
.key = "size",
.regex = "[1-9][0-9]*[xX][1-9][0-9]*",
.preferred = "640x480",
.values = NULL,
.annotations = NULL
},
&size,
res_setting,
res_desc);
if (r)
return r;
if (res_setup) {
mem_fb_setup_t *setup;
setup = til_setup_new(sizeof(*setup), (void(*)(til_setup_t *))free);
if (!setup)
return -ENOMEM;
/* TODO FIXME: parse errors */
sscanf(size, "%ux%u", &setup->width, &setup->height);
*res_setup = &setup->til_setup;
}
return 0;
}
static int mem_fb_init(const til_setup_t *setup, void **res_context)
{
mem_fb_t *c;
int r;
assert(setup);
assert(res_context);
c = calloc(1, sizeof(mem_fb_t));
if (!c) {
r = -ENOMEM;
goto _err;
}
c->setup = *(mem_fb_setup_t *)setup;
*res_context = c;
return 0;
_err:
return r;
}
static void mem_fb_shutdown(til_fb_t *fb, void *context)
{
mem_fb_t *c = context;
assert(c);
free(c);
}
static int mem_fb_acquire(til_fb_t *fb, void *context, void *page)
{
mem_fb_t *c = context;
mem_fb_page_t *p = page;
return 0;
}
static void mem_fb_release(til_fb_t *fb, void *context)
{
}
static void * mem_fb_page_alloc(til_fb_t *fb, void *context, til_fb_fragment_t *res_fragment)
{
mem_fb_t *c = context;
mem_fb_page_t *p;
p = calloc(1, sizeof(mem_fb_page_t) + c->setup.width * c->setup.height * sizeof(uint32_t));
if (!p)
return NULL;
*res_fragment = (til_fb_fragment_t){
.buf = p->buf,
.width = c->setup.width,
.frame_width = c->setup.width,
.height = c->setup.height,
.frame_height = c->setup.height,
.pitch = c->setup.width,
};
return p;
}
static int mem_fb_page_free(til_fb_t *fb, void *context, void *page)
{
mem_fb_t *c = context;
mem_fb_page_t *p = page;
free(p);
return 0;
}
static int mem_fb_page_flip(til_fb_t *fb, void *context, void *page)
{
mem_fb_t *c = context;
mem_fb_page_t *p = page;
/* TODO: add a timer for supporting an fps setting? */
return 0;
}
til_fb_ops_t mem_fb_ops = {
.setup = mem_fb_setup,
.init = mem_fb_init,
.shutdown = mem_fb_shutdown,
.acquire = mem_fb_acquire,
.release = mem_fb_release,
.page_alloc = mem_fb_page_alloc,
.page_free = mem_fb_page_free,
.page_flip = mem_fb_page_flip
};
|
