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
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <wlr/interfaces/wlr_output.h>
#include <wlr/render/gles2.h>
#include <wlr/render/wlr_renderer.h>
#include <wlr/util/log.h>
#include "backend/headless.h"
#include "render/swapchain.h"
#include "render/wlr_renderer.h"
#include "util/signal.h"
static struct wlr_headless_output *headless_output_from_output(
struct wlr_output *wlr_output) {
assert(wlr_output_is_headless(wlr_output));
return (struct wlr_headless_output *)wlr_output;
}
static bool output_set_custom_mode(struct wlr_output *wlr_output, int32_t width,
int32_t height, int32_t refresh) {
struct wlr_headless_output *output =
headless_output_from_output(wlr_output);
if (refresh <= 0) {
refresh = HEADLESS_DEFAULT_REFRESH;
}
wlr_swapchain_destroy(output->swapchain);
output->swapchain = wlr_swapchain_create(output->backend->allocator,
width, height, output->backend->format);
if (!output->swapchain) {
wlr_output_destroy(wlr_output);
return false;
}
output->frame_delay = 1000000 / refresh;
wlr_output_update_custom_mode(&output->wlr_output, width, height, refresh);
return true;
}
static bool output_attach_render(struct wlr_output *wlr_output,
int *buffer_age) {
struct wlr_headless_output *output =
headless_output_from_output(wlr_output);
struct wlr_egl *egl = wlr_gles2_renderer_get_egl(
output->backend->renderer);
wlr_buffer_unlock(output->back_buffer);
output->back_buffer = wlr_swapchain_acquire(output->swapchain, buffer_age);
if (!output->back_buffer) {
return false;
}
if (!wlr_egl_make_current(egl)) {
return false;
}
if (!wlr_renderer_bind_buffer(output->backend->renderer,
output->back_buffer)) {
return false;
}
return true;
}
static bool output_test(struct wlr_output *wlr_output) {
if (wlr_output->pending.committed & WLR_OUTPUT_STATE_ENABLED) {
wlr_log(WLR_DEBUG, "Cannot disable a headless output");
return false;
}
if (wlr_output->pending.committed & WLR_OUTPUT_STATE_MODE) {
assert(wlr_output->pending.mode_type == WLR_OUTPUT_STATE_MODE_CUSTOM);
}
return true;
}
static bool output_commit(struct wlr_output *wlr_output) {
struct wlr_headless_output *output =
headless_output_from_output(wlr_output);
if (!output_test(wlr_output)) {
return false;
}
if (wlr_output->pending.committed & WLR_OUTPUT_STATE_MODE) {
if (!output_set_custom_mode(wlr_output,
wlr_output->pending.custom_mode.width,
wlr_output->pending.custom_mode.height,
wlr_output->pending.custom_mode.refresh)) {
return false;
}
}
if (wlr_output->pending.committed & WLR_OUTPUT_STATE_BUFFER) {
struct wlr_buffer *buffer = NULL;
switch (wlr_output->pending.buffer_type) {
case WLR_OUTPUT_STATE_BUFFER_RENDER:
assert(output->back_buffer != NULL);
wlr_renderer_bind_buffer(output->backend->renderer, NULL);
struct wlr_egl *egl = wlr_gles2_renderer_get_egl(
output->backend->renderer);
wlr_egl_unset_current(egl);
buffer = output->back_buffer;
output->back_buffer = NULL;
break;
case WLR_OUTPUT_STATE_BUFFER_SCANOUT:
buffer = wlr_buffer_lock(wlr_output->pending.buffer);
break;
}
assert(buffer != NULL);
wlr_buffer_unlock(output->front_buffer);
output->front_buffer = buffer;
wlr_swapchain_set_buffer_submitted(output->swapchain, buffer);
wlr_output_send_present(wlr_output, NULL);
}
return true;
}
static void output_rollback_render(struct wlr_output *wlr_output) {
struct wlr_headless_output *output =
headless_output_from_output(wlr_output);
struct wlr_egl *egl = wlr_gles2_renderer_get_egl(
output->backend->renderer);
assert(wlr_egl_is_current(egl));
wlr_renderer_bind_buffer(output->backend->renderer, NULL);
wlr_egl_unset_current(egl);
wlr_buffer_unlock(output->back_buffer);
output->back_buffer = NULL;
}
static bool output_export_dmabuf(struct wlr_output *wlr_output,
struct wlr_dmabuf_attributes *attribs) {
struct wlr_headless_output *output =
headless_output_from_output(wlr_output);
if (!output->front_buffer) {
return false;
}
struct wlr_dmabuf_attributes tmp;
if (!wlr_buffer_get_dmabuf(output->front_buffer, &tmp)) {
return false;
}
return wlr_dmabuf_attributes_copy(attribs, &tmp);
}
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);
wlr_swapchain_destroy(output->swapchain);
wlr_buffer_unlock(output->back_buffer);
wlr_buffer_unlock(output->front_buffer);
free(output);
}
static const struct wlr_output_impl output_impl = {
.destroy = output_destroy,
.attach_render = output_attach_render,
.commit = output_commit,
.rollback_render = output_rollback_render,
.export_dmabuf = output_export_dmabuf,
};
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);
wl_event_source_timer_update(output->frame_timer, output->frame_delay);
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(struct wlr_headless_output));
if (output == NULL) {
wlr_log(WLR_ERROR, "Failed to allocate wlr_headless_output");
return NULL;
}
output->backend = backend;
wlr_output_init(&output->wlr_output, &backend->backend, &output_impl,
backend->display);
struct wlr_output *wlr_output = &output->wlr_output;
output->swapchain = wlr_swapchain_create(backend->allocator,
width, height, backend->format);
if (!output->swapchain) {
goto error;
}
output_set_custom_mode(wlr_output, width, height, 0);
strncpy(wlr_output->make, "headless", sizeof(wlr_output->make));
strncpy(wlr_output->model, "headless", sizeof(wlr_output->model));
snprintf(wlr_output->name, sizeof(wlr_output->name), "HEADLESS-%zd",
++backend->last_output_num);
char description[128];
snprintf(description, sizeof(description),
"Headless output %zd", backend->last_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_event_source_timer_update(output->frame_timer, output->frame_delay);
wlr_output_update_enabled(wlr_output, true);
wlr_signal_emit_safe(&backend->backend.events.new_output, wlr_output);
}
return wlr_output;
error:
wlr_output_destroy(&output->wlr_output);
return NULL;
}
|
