diff options
Diffstat (limited to 'backend/headless/output.c')
| -rw-r--r-- | backend/headless/output.c | 146 |
1 files changed, 146 insertions, 0 deletions
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; +} |