Add wl_output globals for wlr_outputs

backend/drm/backend.c

@@ -118,6 +118,7 @@ struct wlr_backend *wlr_drm_backend_create(struct wl_display *display,
 	state->drm_invalidated.notify = drm_invalidated;
 	wlr_udev_signal_add(udev, state->dev, &state->drm_invalidated);
 
+	state->display = display;
 	struct wl_event_loop *event_loop = wl_display_get_event_loop(display);
 
 	state->drm_event = wl_event_loop_add_fd(event_loop, state->fd,

backend/drm/drm.c

@@ -564,6 +564,7 @@ void wlr_drm_scan_connectors(struct wlr_backend_state *state) {
 
 			scan_property_ids(state->fd, conn, output);
 
+			wlr_output_create_global(wlr_output, state->display);
 			list_add(state->outputs, output);
 			wlr_log(L_INFO, "Found display '%s'", wlr_output->name);
 		} else {

backend/egl.c

@@ -99,8 +99,6 @@ static bool egl_get_config(EGLDisplay disp, EGLConfig *out, EGLenum platform) {
 			continue;
 		}
 
-		// XXX: Is GBM_FORMAT_XRGB8888 what we want?
-		// I don't know if this works for wl_displays.
 		if (gbm_format == GBM_FORMAT_XRGB8888) {
 			*out = configs[i];
 			return true;
@@ -111,7 +109,6 @@ static bool egl_get_config(EGLDisplay disp, EGLConfig *out, EGLenum platform) {
 	return false;
 }
 
-
 bool wlr_egl_init(struct wlr_egl *egl, EGLenum platform, void *display) {
 	if (!egl_exts()) {
 		return false;
@@ -155,14 +152,12 @@ bool wlr_egl_init(struct wlr_egl *egl, EGLenum platform, void *display) {
 		EGL_EXTENSIONS));
 	wlr_log(L_INFO, "Using %s", glGetString(GL_VERSION));
 	wlr_log(L_INFO, "Supported OpenGL ES extensions: %s", glGetString(GL_EXTENSIONS));
-
 	return true;
 
 error:
 	eglTerminate(egl->display);
 	eglReleaseThread();
 	eglMakeCurrent(EGL_NO_DISPLAY, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
-
 	return false;
 }
 
@@ -180,6 +175,5 @@ EGLSurface wlr_egl_create_surface(struct wlr_egl *egl, void *window) {
 		wlr_log(L_ERROR, "Failed to create EGL surface: %s", egl_error());
 		return EGL_NO_SURFACE;
 	}
-
 	return surf;
 }

backend/wayland/output.c

@@ -150,6 +150,7 @@ struct wlr_output *wlr_wl_output_create(struct wlr_backend *_backend) {
 		return false;
 	}
 
+	wlr_output_create_global(wlr_output, backend->local_display);
 	list_add(backend->outputs, wlr_output);
 	wl_signal_emit(&backend->backend->events.output_add, wlr_output);
 	return wlr_output;

include/backend/drm.h

@@ -32,6 +32,7 @@ struct wlr_backend_state {
 	dev_t dev;
 
 	struct wlr_backend *backend;
+	struct wl_display *display;
 	struct wl_event_source *drm_event;
 
 	struct wl_listener session_signal;

include/wlr/interfaces/wlr_output.h

@@ -19,5 +19,7 @@ struct wlr_output *wlr_output_create(struct wlr_output_impl *impl,
 		struct wlr_output_state *state);
 void wlr_output_free(struct wlr_output *output);
 void wlr_output_update_matrix(struct wlr_output *output);
+struct wl_global *wlr_output_create_global(
+		struct wlr_output *wlr_output, struct wl_display *display);
 
 #endif

include/wlr/types/wlr_output.h

@@ -19,6 +19,8 @@ struct wlr_output_state;
 struct wlr_output {
 	const struct wlr_output_impl *impl;
 	struct wlr_output_state *state;
+	struct wl_global *wl_global;
+	struct wl_list resource_list;
 
 	uint32_t flags;
 	char name[16];

types/wlr_output.c

@@ -1,3 +1,4 @@
+#include <assert.h>
 #include <stdlib.h>
 #include <string.h>
 #include <tgmath.h>
@@ -5,6 +6,83 @@
 #include <wlr/types/wlr_output.h>
 #include <wlr/interfaces/wlr_output.h>
 #include <wlr/util/list.h>
+#include <wlr/util/log.h>
+
+static void wl_output_send_to_resource(struct wl_resource *resource) {
+	assert(resource);
+	struct wlr_output *output = wl_resource_get_user_data(resource);
+	assert(output);
+	const uint32_t version = wl_resource_get_version(resource);
+	if (version >= WL_OUTPUT_GEOMETRY_SINCE_VERSION) {
+		wl_output_send_geometry(resource, 0, 0, // TODO: get position from layout?
+				output->phys_width, output->phys_height, output->subpixel,
+				output->make, output->model, output->transform);
+	}
+	if (version >= WL_OUTPUT_MODE_SINCE_VERSION) {
+		for (size_t i = 0; i < output->modes->length; ++i) {
+			struct wlr_output_mode *mode = output->modes->items[i];
+			// TODO: mode->flags should just be preferred
+			uint32_t flags = mode->flags;
+			if (output->current_mode == mode) {
+				flags |= WL_OUTPUT_MODE_CURRENT;
+			}
+			wl_output_send_mode(resource, flags,
+					mode->width, mode->height, mode->refresh);
+		}
+	}
+	if (version >= WL_OUTPUT_SCALE_SINCE_VERSION) {
+		wl_output_send_scale(resource, output->scale);
+	}
+	if (version >= WL_OUTPUT_DONE_SINCE_VERSION) {
+		wl_output_send_done(resource);
+	}
+}
+
+static void wl_output_destroy(struct wl_resource *resource) {
+	struct wlr_output *output = wl_resource_get_user_data(resource);
+	struct wl_resource *_resource = NULL;
+	wl_resource_for_each(_resource, &output->resource_list) {
+		if (_resource == resource) {
+			struct wl_list *link = wl_resource_get_link(_resource);
+			wl_list_remove(link);
+			break;
+		}
+	}
+}
+
+static void wl_output_release(struct wl_client *client, struct wl_resource *resource) {
+	wl_output_destroy(resource);
+}
+
+static struct wl_output_interface wl_output_impl = {
+	.release = wl_output_release
+};
+
+static void wl_output_bind(struct wl_client *wl_client, void *_wlr_output,
+		uint32_t version, uint32_t id) {
+	struct wlr_output *wlr_output = _wlr_output;
+	assert(wl_client && wlr_output);
+	if (version > 3) {
+		wlr_log(L_ERROR, "Client requested unsupported wl_output version, disconnecting");
+		wl_client_destroy(wl_client);
+		return;
+	}
+	struct wl_resource *wl_resource = wl_resource_create(
+			wl_client, &wl_output_interface, version, id);
+	wl_resource_set_implementation(wl_resource, &wl_output_impl,
+			wlr_output, wl_output_destroy);
+	wl_list_insert(&wlr_output->resource_list, wl_resource_get_link(wl_resource));
+	wl_output_send_to_resource(wl_resource);
+}
+
+struct wl_global *wlr_output_create_global(
+		struct wlr_output *wlr_output, struct wl_display *display) {
+	struct wl_global *wl_global = wl_global_create(display,
+		&wl_output_interface, 3, wlr_output, wl_output_bind);
+	wlr_output->wl_global = wl_global;
+	wl_list_init(&wlr_output->resource_list);
+	return wl_global;
+}
 
 static const float transforms[][4] = {
 	[WL_OUTPUT_TRANSFORM_NORMAL] = {