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138 lines
3.2 KiB
138 lines
3.2 KiB
#include <wayland-server.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <assert.h>
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#include <libinput.h>
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#include <wlr/backend/session.h>
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#include <wlr/backend/interface.h>
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#include <wlr/backend/drm.h>
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#include <wlr/backend/libinput.h>
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#include <wlr/backend/wayland.h>
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#include <wlr/backend/x11.h>
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#include <wlr/backend/multi.h>
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#include <wlr/util/log.h>
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void wlr_backend_init(struct wlr_backend *backend,
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const struct wlr_backend_impl *impl) {
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assert(backend);
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backend->impl = impl;
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wl_signal_init(&backend->events.input_add);
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wl_signal_init(&backend->events.input_remove);
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wl_signal_init(&backend->events.output_add);
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wl_signal_init(&backend->events.output_remove);
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}
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bool wlr_backend_start(struct wlr_backend *backend) {
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if (backend->impl->start) {
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return backend->impl->start(backend);
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}
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return true;
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}
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void wlr_backend_destroy(struct wlr_backend *backend) {
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if (backend->impl && backend->impl->destroy) {
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backend->impl->destroy(backend);
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} else {
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free(backend);
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}
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}
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struct wlr_egl *wlr_backend_get_egl(struct wlr_backend *backend) {
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if (backend->impl->get_egl) {
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return backend->impl->get_egl(backend);
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}
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return NULL;
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}
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static struct wlr_backend *attempt_wl_backend(struct wl_display *display) {
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struct wlr_backend *backend = wlr_wl_backend_create(display);
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if (backend) {
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int outputs = 1;
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const char *_outputs = getenv("WLR_WL_OUTPUTS");
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if (_outputs) {
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char *end;
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outputs = (int)strtol(_outputs, &end, 10);
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if (*end) {
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wlr_log(L_ERROR, "WLR_WL_OUTPUTS specified with invalid integer, ignoring");
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outputs = 1;
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} else if (outputs < 0) {
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wlr_log(L_ERROR, "WLR_WL_OUTPUTS specified with negative outputs, ignoring");
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outputs = 1;
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}
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}
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while (outputs--) {
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wlr_wl_output_create(backend);
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}
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}
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return backend;
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}
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struct wlr_backend *wlr_backend_autocreate(struct wl_display *display) {
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struct wlr_backend *backend;
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if (getenv("WAYLAND_DISPLAY") || getenv("_WAYLAND_DISPLAY")) {
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backend = attempt_wl_backend(display);
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if (backend) {
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return backend;
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}
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}
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const char *x11_display = getenv("DISPLAY");
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if (x11_display) {
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return wlr_x11_backend_create(display, x11_display);
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}
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// Attempt DRM+libinput
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struct wlr_session *session = wlr_session_create(display);
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if (!session) {
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wlr_log(L_ERROR, "Failed to start a DRM session");
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return NULL;
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}
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backend = wlr_multi_backend_create(session);
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if (!backend) {
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goto error_session;
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}
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struct wlr_backend *libinput = wlr_libinput_backend_create(display, session);
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if (!libinput) {
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goto error_multi;
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}
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wlr_multi_backend_add(backend, libinput);
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int gpus[8];
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size_t num_gpus = wlr_session_find_gpus(session, 8, gpus);
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struct wlr_backend *primary_drm = NULL;
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wlr_log(L_INFO, "Found %zu GPUs", num_gpus);
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for (size_t i = 0; i < num_gpus; ++i) {
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struct wlr_backend *drm = wlr_drm_backend_create(display, session, gpus[i]);
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if (!drm) {
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wlr_log(L_ERROR, "Failed to open DRM device");
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continue;
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}
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if (!primary_drm) {
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primary_drm = drm;
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}
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wlr_multi_backend_add(backend, drm);
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}
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if (!primary_drm) {
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wlr_log(L_ERROR, "Failed to open any DRM device");
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goto error_multi;
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}
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return backend;
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error_multi:
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wlr_backend_destroy(backend);
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error_session:
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wlr_session_destroy(session);
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return NULL;
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}
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