diff options
Diffstat (limited to 'backend/backend.c')
| -rw-r--r-- | backend/backend.c | 139 |
1 files changed, 114 insertions, 25 deletions
diff --git a/backend/backend.c b/backend/backend.c index 20bf42b3..b57fd424 100644 --- a/backend/backend.c +++ b/backend/backend.c @@ -1,3 +1,4 @@ +#define _POSIX_C_SOURCE 200809L #include <assert.h> #include <errno.h> #include <libinput.h> @@ -6,6 +7,7 @@ #include <unistd.h> #include <wayland-server.h> #include <wlr/backend/drm.h> +#include <wlr/backend/headless.h> #include <wlr/backend/interface.h> #include <wlr/backend/libinput.h> #include <wlr/backend/multi.h> @@ -101,6 +103,76 @@ static struct wlr_backend *attempt_x11_backend(struct wl_display *display, } #endif +static struct wlr_backend *attempt_headless_backend( + struct wl_display *display) { + struct wlr_backend *backend = wlr_headless_backend_create(display); + if (backend == NULL) { + return NULL; + } + + size_t outputs = parse_outputs_env("WLR_HEADLESS_OUTPUTS"); + for (size_t i = 0; i < outputs; ++i) { + wlr_headless_add_output(backend, 1280, 720); + } + + return backend; +} + +static struct wlr_backend *attempt_drm_backend(struct wl_display *display, + struct wlr_backend *backend, struct wlr_session *session) { + int gpus[8]; + size_t num_gpus = wlr_session_find_gpus(session, 8, gpus); + struct wlr_backend *primary_drm = NULL; + wlr_log(L_INFO, "Found %zu GPUs", num_gpus); + + for (size_t i = 0; i < num_gpus; ++i) { + struct wlr_backend *drm = wlr_drm_backend_create(display, session, + gpus[i], primary_drm); + if (!drm) { + wlr_log(L_ERROR, "Failed to open DRM device %d", gpus[i]); + continue; + } + + if (!primary_drm) { + primary_drm = drm; + } + + wlr_multi_backend_add(backend, drm); + } + + return primary_drm; +} + +static struct wlr_backend *attempt_backend_by_name(struct wl_display *display, + struct wlr_backend *backend, struct wlr_session **session, + const char *name) { + if (strcmp(name, "wayland") == 0) { + return attempt_wl_backend(display); +#ifdef WLR_HAS_X11_BACKEND + } else if (strcmp(name, "x11") == 0) { + return attempt_x11_backend(display, NULL); +#endif + } else if (strcmp(name, "headless") == 0) { + return attempt_headless_backend(display); + } else if (strcmp(name, "drm") == 0 || strcmp(name, "libinput") == 0) { + // DRM and libinput need a session + *session = wlr_session_create(display); + if (!*session) { + wlr_log(L_ERROR, "failed to start a session"); + return NULL; + } + + if (strcmp(name, "libinput") == 0) { + return wlr_libinput_backend_create(display, *session); + } else { + return attempt_drm_backend(display, backend, *session); + } + } + + wlr_log(L_ERROR, "unrecognized backend '%s'", name); + return NULL; +} + struct wlr_backend *wlr_backend_autocreate(struct wl_display *display) { struct wlr_backend *backend = wlr_multi_backend_create(display); if (!backend) { @@ -108,6 +180,42 @@ struct wlr_backend *wlr_backend_autocreate(struct wl_display *display) { return NULL; } + struct wlr_session *session = NULL; + + char *names = getenv("WLR_BACKENDS"); + if (names) { + names = strdup(names); + if (names == NULL) { + wlr_log(L_ERROR, "allocation failed"); + wlr_backend_destroy(backend); + return NULL; + } + + char *saveptr; + char *name = strtok_r(names, ",", &saveptr); + while (name != NULL) { + struct wlr_backend *subbackend = + attempt_backend_by_name(display, backend, &session, name); + if (subbackend == NULL) { + wlr_log(L_ERROR, "failed to start backend '%s'", name); + wlr_backend_destroy(backend); + wlr_session_destroy(session); + return NULL; + } + + if (!wlr_multi_backend_add(backend, subbackend)) { + wlr_log(L_ERROR, "failed to add backend '%s'", name); + wlr_backend_destroy(backend); + wlr_session_destroy(session); + return NULL; + } + + name = strtok_r(NULL, ",", &saveptr); + } + + return backend; + } + if (getenv("WAYLAND_DISPLAY") || getenv("_WAYLAND_DISPLAY") || getenv("WAYLAND_SOCKET")) { struct wlr_backend *wl_backend = attempt_wl_backend(display); @@ -130,7 +238,7 @@ struct wlr_backend *wlr_backend_autocreate(struct wl_display *display) { #endif // Attempt DRM+libinput - struct wlr_session *session = wlr_session_create(display); + session = wlr_session_create(display); if (!session) { wlr_log(L_ERROR, "Failed to start a DRM session"); wlr_backend_destroy(backend); @@ -138,40 +246,21 @@ struct wlr_backend *wlr_backend_autocreate(struct wl_display *display) { } struct wlr_backend *libinput = wlr_libinput_backend_create(display, session); - if (libinput) { - wlr_multi_backend_add(backend, libinput); - } else { + if (!libinput) { wlr_log(L_ERROR, "Failed to start libinput backend"); wlr_backend_destroy(backend); wlr_session_destroy(session); return NULL; } + wlr_multi_backend_add(backend, libinput); - int gpus[8]; - size_t num_gpus = wlr_session_find_gpus(session, 8, gpus); - struct wlr_backend *primary_drm = NULL; - wlr_log(L_INFO, "Found %zu GPUs", num_gpus); - - for (size_t i = 0; i < num_gpus; ++i) { - struct wlr_backend *drm = wlr_drm_backend_create(display, session, - gpus[i], primary_drm); - if (!drm) { - wlr_log(L_ERROR, "Failed to open DRM device"); - continue; - } - - if (!primary_drm) { - primary_drm = drm; - } - - wlr_multi_backend_add(backend, drm); - } - + struct wlr_backend *primary_drm = + attempt_drm_backend(display, backend, session); if (!primary_drm) { wlr_log(L_ERROR, "Failed to open any DRM device"); wlr_backend_destroy(libinput); - wlr_session_destroy(session); wlr_backend_destroy(backend); + wlr_session_destroy(session); return NULL; } |