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#include <stdlib.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <wlr/util/log.h>
#include <wlr/interfaces/wlr_output.h>
#include <wlr/interfaces/wlr_input_device.h>
#include "backend/headless.h"
#include "glapi.h"
static bool backend_start(struct wlr_backend *wlr_backend) {
struct wlr_headless_backend *backend =
(struct wlr_headless_backend *)wlr_backend;
wlr_log(L_INFO, "Starting headless backend");
struct wlr_headless_output *output;
wl_list_for_each(output, &backend->outputs, link) {
wl_event_source_timer_update(output->frame_timer, output->frame_delay);
output->wlr_output.enabled = true;
wl_signal_emit(&backend->backend.events.output_add,
&output->wlr_output);
}
struct wlr_headless_input_device *input_device;
wl_list_for_each(input_device, &backend->input_devices,
wlr_input_device.link) {
wl_signal_emit(&backend->backend.events.input_add,
&input_device->wlr_input_device);
}
backend->started = true;
return true;
}
static void backend_destroy(struct wlr_backend *wlr_backend) {
struct wlr_headless_backend *backend =
(struct wlr_headless_backend *)wlr_backend;
if (!wlr_backend) {
return;
}
wl_list_remove(&backend->display_destroy.link);
struct wlr_headless_output *output, *output_tmp;
wl_list_for_each_safe(output, output_tmp, &backend->outputs, link) {
wlr_output_destroy(&output->wlr_output);
}
struct wlr_headless_input_device *input_device, *input_device_tmp;
wl_list_for_each_safe(input_device, input_device_tmp,
&backend->input_devices, wlr_input_device.link) {
wlr_input_device_destroy(&input_device->wlr_input_device);
}
wlr_egl_finish(&backend->egl);
free(backend);
}
static struct wlr_egl *backend_get_egl(struct wlr_backend *wlr_backend) {
struct wlr_headless_backend *backend =
(struct wlr_headless_backend *)wlr_backend;
return &backend->egl;
}
static const struct wlr_backend_impl backend_impl = {
.start = backend_start,
.destroy = backend_destroy,
.get_egl = backend_get_egl,
};
static void handle_display_destroy(struct wl_listener *listener, void *data) {
struct wlr_headless_backend *backend =
wl_container_of(listener, backend, display_destroy);
backend_destroy(&backend->backend);
}
struct wlr_backend *wlr_headless_backend_create(struct wl_display *display) {
wlr_log(L_INFO, "Creating headless backend");
struct wlr_headless_backend *backend =
calloc(1, sizeof(struct wlr_headless_backend));
if (!backend) {
wlr_log(L_ERROR, "Failed to allocate wlr_headless_backend");
return NULL;
}
wlr_backend_init(&backend->backend, &backend_impl);
backend->display = display;
wl_list_init(&backend->outputs);
wl_list_init(&backend->input_devices);
static const EGLint config_attribs[] = {
EGL_SURFACE_TYPE, EGL_PBUFFER_BIT,
EGL_ALPHA_SIZE, 0,
EGL_BLUE_SIZE, 8,
EGL_GREEN_SIZE, 8,
EGL_RED_SIZE, 8,
EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
EGL_NONE,
};
bool ok = wlr_egl_init(&backend->egl, EGL_PLATFORM_SURFACELESS_MESA, NULL,
(EGLint *)config_attribs, 0);
if (!ok) {
free(backend);
return NULL;
}
backend->display_destroy.notify = handle_display_destroy;
wl_display_add_destroy_listener(display, &backend->display_destroy);
return &backend->backend;
}
bool wlr_backend_is_headless(struct wlr_backend *backend) {
return backend->impl == &backend_impl;
}
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