weston screen shooter 뜯어보기

weston_screenshooter_shoot()을 따라오는데 영 어딜 파야 나올지 감이 안온다.

아무튼.. libweston의 screenshooter.c가 실제적으로 수행되는 부분 같은데

//git\include\libweston\libweston.h int weston_screenshooter_shoot(struct weston_output *output, struct weston_buffer *buffer,    weston_screenshooter_done_func_t done, void *data); //git\libweston\screenshooter.c WL_EXPORT int weston_screenshooter_shoot(struct weston_output *output,    struct weston_buffer *buffer,    weston_screenshooter_done_func_t done, void *data) { struct screenshooter_frame_listener *l; if (!wl_shm_buffer_get(buffer->resource)) { done(data, WESTON_SCREENSHOOTER_BAD_BUFFER); return -1; } buffer->shm_buffer = wl_shm_buffer_get(buffer->resource); buffer->width = wl_shm_buffer_get_width(buffer->shm_buffer); buffer->height = wl_shm_buffer_get_height(buffer->shm_buffer); if (buffer->width < output->current_mode->width ||     buffer->height < output->current_mode->height) { done(data, WESTON_SCREENSHOOTER_BAD_BUFFER); return -1; } l = malloc(sizeof *l); if (l == NULL) { done(data, WESTON_SCREENSHOOTER_NO_MEMORY); return -1; } l->buffer = buffer; l->output = output; l->done = done; l->data = data; l->listener.notify = screenshooter_frame_notify; wl_signal_add(&output->frame_signal, &l->listener); weston_output_disable_planes_incr(output); weston_output_damage(output); return 0; }

 

아무튼 추적을 계속해보면 아래와 같이 event_loop에 wl_event_loop_add_idle() 실행해서 추가해주고 끝.

//git\libweston\compositor.c static void weston_schedule_surface_protection_update(struct weston_compositor *compositor) { struct content_protection *cp = compositor->content_protection; struct wl_event_loop *loop; if (!cp || cp->surface_protection_update) return; loop = wl_display_get_event_loop(compositor->wl_display); cp->surface_protection_update = wl_event_loop_add_idle(loop,        notify_surface_protection_change,        compositor); } WL_EXPORT void weston_output_disable_planes_incr(struct weston_output *output) { output->disable_planes++; /*  * If disable_planes changes from 0 to non-zero, it means some type of  * recording of content has started, and therefore protection level of  * the protected surfaces must be updated to avoid the recording of  * the protected content.  */ if (output->disable_planes == 1) weston_schedule_surface_protection_update(output->compositor); }

 

struct content_protection은 누가 만드나 하면서 따라가보니

weston_compositor_enable_content_protection() 함수에서 만들어 주고 해당 함수는

//git\libweston\content-protection.c WL_EXPORT int weston_compositor_enable_content_protection(struct weston_compositor *compositor) { struct content_protection *cp; cp = zalloc(sizeof(*cp)); if (cp == NULL) return -1; cp->compositor = compositor; compositor->content_protection = cp; wl_list_init(&cp->protected_list); if (wl_global_create(compositor->wl_display,      &weston_content_protection_interface, 1, cp,      bind_weston_content_protection) == NULL) return -1; cp->destroy_listener.notify = cp_destroy_listener; wl_signal_add(&compositor->destroy_signal, &cp->destroy_listener); cp->debug = weston_compositor_add_log_scope(compositor, "content-protection-debug",     "debug-logs for content-protection",     NULL, NULL, NULL); return 0; }

 

drm_backend_create() 시에 b->atomic_modeset 조건에 의해서 생성된다.

//git\libweston\backend-drm\drm.c static struct drm_backend * drm_backend_create(struct weston_compositor *compositor,    struct weston_drm_backend_config *config) { if (b->atomic_modeset) if (weston_compositor_enable_content_protection(compositor) < 0) weston_log("Error: initializing content-protection "    "support failed.\n"); }

 

 

이름이 비슷한건지 걸려나오는 다른 녀석.

//protocol\weston-screenshooter-client-protocol.h #define WESTON_SCREENSHOOTER_SHOOT 0 static inline void weston_screenshooter_shoot(struct weston_screenshooter *weston_screenshooter, struct wl_output *output, struct wl_buffer *buffer) { wl_proxy_marshal((struct wl_proxy *) weston_screenshooter,  WESTON_SCREENSHOOTER_SHOOT, output, buffer); }

 

 wl_proxy_marshall()은 또 멀까해서 따라가 보지만.. 답이 안나온다 -_ㅠ

//wayland-main\src\wayland-client.c WL_EXPORT struct wl_proxy * wl_proxy_marshal_array_constructor_versioned(struct wl_proxy *proxy,      uint32_t opcode,      union wl_argument *args,      const struct wl_interface *interface,      uint32_t version) { return wl_proxy_marshal_array_flags(proxy, opcode, interface, version, 0, args); } WL_EXPORT struct wl_proxy * wl_proxy_marshal_array_constructor(struct wl_proxy *proxy,    uint32_t opcode, union wl_argument *args,    const struct wl_interface *interface) { return wl_proxy_marshal_array_constructor_versioned(proxy, opcode,     args, interface,     proxy->version); } WL_EXPORT void wl_proxy_marshal(struct wl_proxy *proxy, uint32_t opcode, ...) { union wl_argument args[WL_CLOSURE_MAX_ARGS]; va_list ap; va_start(ap, opcode); wl_argument_from_va_list(proxy->object.interface->methods[opcode].signature,  args, WL_CLOSURE_MAX_ARGS, ap); va_end(ap); wl_proxy_marshal_array_constructor(proxy, opcode, args, NULL); }