diff options
Diffstat (limited to 'backend/headless')
| -rw-r--r-- | backend/headless/backend.c | 114 | ||||
| -rw-r--r-- | backend/headless/input_device.c | 91 | ||||
| -rw-r--r-- | backend/headless/output.c | 146 |
3 files changed, 351 insertions, 0 deletions
diff --git a/backend/headless/backend.c b/backend/headless/backend.c new file mode 100644 index 00000000..f95e3897 --- /dev/null +++ b/backend/headless/backend.c @@ -0,0 +1,114 @@ +#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); + wlr_output_create_global(&output->wlr_output, backend->display); + 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; +} diff --git a/backend/headless/input_device.c b/backend/headless/input_device.c new file mode 100644 index 00000000..05def775 --- /dev/null +++ b/backend/headless/input_device.c @@ -0,0 +1,91 @@ +#include <stdlib.h> +#include <wlr/interfaces/wlr_input_device.h> +#include <wlr/interfaces/wlr_pointer.h> +#include <wlr/interfaces/wlr_keyboard.h> +#include <wlr/interfaces/wlr_touch.h> +#include <wlr/interfaces/wlr_tablet_tool.h> +#include <wlr/interfaces/wlr_tablet_pad.h> +#include <wlr/util/log.h> +#include "backend/headless.h" + +static void input_device_destroy(struct wlr_input_device *wlr_dev) { + struct wlr_headless_input_device *device = + (struct wlr_headless_input_device *)wlr_dev; + wl_signal_emit(&device->backend->backend.events.input_remove, wlr_dev); + free(device); +} + +static struct wlr_input_device_impl input_device_impl = { + .destroy = input_device_destroy, +}; + +struct wlr_input_device *wlr_headless_add_input_device( + struct wlr_backend *wlr_backend, enum wlr_input_device_type type) { + struct wlr_headless_backend *backend = + (struct wlr_headless_backend *)wlr_backend; + + struct wlr_headless_input_device *device = + calloc(1, sizeof(struct wlr_headless_input_device)); + if (device == NULL) { + return NULL; + } + device->backend = backend; + + int vendor = 0; + int product = 0; + const char *name = "headless"; + struct wlr_input_device *wlr_device = &device->wlr_input_device; + wlr_input_device_init(wlr_device, type, &input_device_impl, name, vendor, + product); + + switch (type) { + case WLR_INPUT_DEVICE_KEYBOARD: + wlr_device->keyboard = calloc(1, sizeof(struct wlr_keyboard)); + if (wlr_device->keyboard == NULL) { + wlr_log(L_ERROR, "Unable to allocate wlr_keyboard"); + return NULL; + } + wlr_keyboard_init(wlr_device->keyboard, NULL); + break; + case WLR_INPUT_DEVICE_POINTER: + wlr_device->pointer = calloc(1, sizeof(struct wlr_pointer)); + if (wlr_device->pointer == NULL) { + wlr_log(L_ERROR, "Unable to allocate wlr_pointer"); + return NULL; + } + wlr_pointer_init(wlr_device->pointer, NULL); + break; + case WLR_INPUT_DEVICE_TOUCH: + wlr_device->touch = calloc(1, sizeof(struct wlr_touch)); + if (wlr_device->touch == NULL) { + wlr_log(L_ERROR, "Unable to allocate wlr_touch"); + return NULL; + } + wlr_touch_init(wlr_device->touch, NULL); + break; + case WLR_INPUT_DEVICE_TABLET_TOOL: + wlr_device->tablet_tool = calloc(1, sizeof(struct wlr_tablet_tool)); + if (wlr_device->tablet_tool == NULL) { + wlr_log(L_ERROR, "Unable to allocate wlr_tablet_tool"); + return NULL; + } + wlr_tablet_tool_init(wlr_device->tablet_tool, NULL); + break; + case WLR_INPUT_DEVICE_TABLET_PAD: + wlr_device->tablet_pad = calloc(1, sizeof(struct wlr_tablet_pad)); + if (wlr_device->tablet_pad == NULL) { + wlr_log(L_ERROR, "Unable to allocate wlr_tablet_pad"); + return NULL; + } + wlr_tablet_pad_init(wlr_device->tablet_pad, NULL); + break; + } + + wl_list_insert(&backend->input_devices, &wlr_device->link); + + if (backend->started) { + wl_signal_emit(&backend->backend.events.input_add, wlr_device); + } + + return wlr_device; +} diff --git a/backend/headless/output.c b/backend/headless/output.c new file mode 100644 index 00000000..9c4ba35e --- /dev/null +++ b/backend/headless/output.c @@ -0,0 +1,146 @@ +#include <stdlib.h> +#include <EGL/egl.h> +#include <EGL/eglext.h> +#include <GLES2/gl2.h> +#include <wlr/interfaces/wlr_output.h> +#include <wlr/util/log.h> +#include "backend/headless.h" + +static EGLSurface egl_create_surface(struct wlr_egl *egl, unsigned int width, + unsigned int height) { + EGLint attribs[] = {EGL_WIDTH, width, EGL_HEIGHT, height, EGL_NONE}; + + EGLSurface surf = eglCreatePbufferSurface(egl->display, egl->config, attribs); + if (surf == EGL_NO_SURFACE) { + wlr_log(L_ERROR, "Failed to create EGL surface: %s", egl_error()); + return EGL_NO_SURFACE; + } + return surf; +} + +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 = + (struct wlr_headless_output *)wlr_output; + struct wlr_headless_backend *backend = output->backend; + + if (output->egl_surface) { + eglDestroySurface(backend->egl.display, output->egl_surface); + } + + output->egl_surface = egl_create_surface(&backend->egl, width, height); + if (output->egl_surface == EGL_NO_SURFACE) { + wlr_log(L_ERROR, "Failed to recreate EGL surface"); + 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 void output_transform(struct wlr_output *wlr_output, + enum wl_output_transform transform) { + struct wlr_headless_output *output = + (struct wlr_headless_output *)wlr_output; + output->wlr_output.transform = transform; +} + +static void output_make_current(struct wlr_output *wlr_output) { + struct wlr_headless_output *output = + (struct wlr_headless_output *)wlr_output; + if (!eglMakeCurrent(output->backend->egl.display, + output->egl_surface, output->egl_surface, + output->backend->egl.context)) { + wlr_log(L_ERROR, "eglMakeCurrent failed: %s", egl_error()); + } +} + +static void output_swap_buffers(struct wlr_output *wlr_output) { + // No-op +} + +static void output_destroy(struct wlr_output *wlr_output) { + struct wlr_headless_output *output = + (struct wlr_headless_output *)wlr_output; + wl_signal_emit(&output->backend->backend.events.output_remove, + &output->wlr_output); + + wl_list_remove(&output->link); + + eglDestroySurface(output->backend->egl.display, output->egl_surface); + free(output); +} + +static const struct wlr_output_impl output_impl = { + .set_custom_mode = output_set_custom_mode, + .transform = output_transform, + .destroy = output_destroy, + .make_current = output_make_current, + .swap_buffers = output_swap_buffers, +}; + +static int signal_frame(void *data) { + struct wlr_headless_output *output = data; + wl_signal_emit(&output->wlr_output.events.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 = + (struct wlr_headless_backend *)wlr_backend; + + struct wlr_headless_output *output = + calloc(1, sizeof(struct wlr_headless_output)); + if (output == NULL) { + wlr_log(L_ERROR, "Failed to allocate wlr_headless_output"); + return NULL; + } + output->backend = backend; + wlr_output_init(&output->wlr_output, &backend->backend, &output_impl); + struct wlr_output *wlr_output = &output->wlr_output; + + output->egl_surface = egl_create_surface(&backend->egl, width, height); + if (output->egl_surface == EGL_NO_SURFACE) { + wlr_log(L_ERROR, "Failed to create EGL surface"); + goto error; + } + + output_set_custom_mode(wlr_output, width, height, 60*1000); + 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-%d", + wl_list_length(&backend->outputs) + 1); + + if (!eglMakeCurrent(output->backend->egl.display, + output->egl_surface, output->egl_surface, + output->backend->egl.context)) { + wlr_log(L_ERROR, "eglMakeCurrent failed: %s", egl_error()); + goto error; + } + + glViewport(0, 0, wlr_output->width, wlr_output->height); + glClearColor(1.0, 1.0, 1.0, 1.0); + glClear(GL_COLOR_BUFFER_BIT); + + 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_create_global(wlr_output, backend->display); + wl_signal_emit(&backend->backend.events.output_add, wlr_output); + } + + return wlr_output; + +error: + wlr_output_destroy(&output->wlr_output); + return NULL; +} |