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
|
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <wlr/interfaces/wlr_output.h>
#include <wlr/types/wlr_output_layer.h>
#include <wlr/util/log.h>
#include "backend/headless.h"
#include "types/wlr_output.h"
static const uint32_t SUPPORTED_OUTPUT_STATE =
WLR_OUTPUT_STATE_BACKEND_OPTIONAL |
WLR_OUTPUT_STATE_BUFFER |
WLR_OUTPUT_STATE_ENABLED |
WLR_OUTPUT_STATE_MODE;
static size_t last_output_num = 0;
static struct wlr_headless_output *headless_output_from_output(
struct wlr_output *wlr_output) {
assert(wlr_output_is_headless(wlr_output));
struct wlr_headless_output *output = wl_container_of(wlr_output, output, wlr_output);
return output;
}
static void output_update_refresh(struct wlr_headless_output *output,
int32_t refresh) {
if (refresh <= 0) {
refresh = HEADLESS_DEFAULT_REFRESH;
}
output->frame_delay = 1000000 / refresh;
}
static bool output_test(struct wlr_output *wlr_output,
const struct wlr_output_state *state) {
uint32_t unsupported = state->committed & ~SUPPORTED_OUTPUT_STATE;
if (unsupported != 0) {
wlr_log(WLR_DEBUG, "Unsupported output state fields: 0x%"PRIx32,
unsupported);
return false;
}
if (state->committed & WLR_OUTPUT_STATE_MODE) {
assert(state->mode_type == WLR_OUTPUT_STATE_MODE_CUSTOM);
}
if (state->committed & WLR_OUTPUT_STATE_LAYERS) {
for (size_t i = 0; i < state->layers_len; i++) {
state->layers[i].accepted = true;
}
}
return true;
}
static bool output_commit(struct wlr_output *wlr_output,
const struct wlr_output_state *state) {
struct wlr_headless_output *output =
headless_output_from_output(wlr_output);
if (!output_test(wlr_output, state)) {
return false;
}
if (state->committed & WLR_OUTPUT_STATE_MODE) {
output_update_refresh(output, state->custom_mode.refresh);
}
if (output_pending_enabled(wlr_output, state)) {
struct wlr_output_event_present present_event = {
.commit_seq = wlr_output->commit_seq + 1,
.presented = true,
};
output_defer_present(wlr_output, present_event);
wl_event_source_timer_update(output->frame_timer, output->frame_delay);
}
return true;
}
static void output_destroy(struct wlr_output *wlr_output) {
struct wlr_headless_output *output =
headless_output_from_output(wlr_output);
wl_list_remove(&output->link);
wl_event_source_remove(output->frame_timer);
free(output);
}
static const struct wlr_output_impl output_impl = {
.destroy = output_destroy,
.commit = output_commit,
};
bool wlr_output_is_headless(struct wlr_output *wlr_output) {
return wlr_output->impl == &output_impl;
}
static int signal_frame(void *data) {
struct wlr_headless_output *output = data;
wlr_output_send_frame(&output->wlr_output);
return 0;
}
struct wlr_output *wlr_headless_add_output(struct wlr_backend *wlr_backend,
unsigned int width, unsigned int height) {
struct wlr_headless_backend *backend =
headless_backend_from_backend(wlr_backend);
struct wlr_headless_output *output = calloc(1, sizeof(*output));
if (output == NULL) {
wlr_log(WLR_ERROR, "Failed to allocate wlr_headless_output");
return NULL;
}
output->backend = backend;
struct wlr_output *wlr_output = &output->wlr_output;
struct wlr_output_state state;
wlr_output_state_init(&state);
wlr_output_state_set_custom_mode(&state, width, height, 0);
wlr_output_init(wlr_output, &backend->backend, &output_impl, backend->display, &state);
wlr_output_state_finish(&state);
output_update_refresh(output, 0);
size_t output_num = ++last_output_num;
char name[64];
snprintf(name, sizeof(name), "HEADLESS-%zu", output_num);
wlr_output_set_name(wlr_output, name);
char description[128];
snprintf(description, sizeof(description), "Headless output %zu", output_num);
wlr_output_set_description(wlr_output, description);
struct wl_event_loop *ev = wl_display_get_event_loop(backend->display);
output->frame_timer = wl_event_loop_add_timer(ev, signal_frame, output);
wl_list_insert(&backend->outputs, &output->link);
if (backend->started) {
wl_signal_emit_mutable(&backend->backend.events.new_output, wlr_output);
}
return wlr_output;
}
|
