Merge branch 'multithread-dev' into dev

doxygen/cairo-renderer.dox

@@ -1,4 +1,4 @@
 /**
  * @defgroup Cairo-Renderer Cairo Renderer 
- * @ingroup renderers
+ * @ingroup GdsOutputRenderer
  */

doxygen/external-renderer.dox

@@ -1,4 +1,15 @@
 /**
- * @defgroup external-renderer External Shared Object Renderer
+ * @defgroup ExternalRenderer External Shared Object Renderer
- * @ingroup renderers
+ * @ingroup GdsOutputRenderer
+ *
+ * @subsection ExternalRendererProps Properties
+ * This class inherits all properties from its parent @ref GdsOutputRenderer.
+ * In addition to that, it implements the following properties:
+ *
+ * Property Name    | Description
+ * -----------------|----------------------------------------------------------------
+ * shared-object-path  | Path to the shared object used for rendering
+ *
+ * All these properties have to be set for rendering.
+ *
  */

doxygen/gds-output-renderer.dox

@@ -0,0 +1,34 @@
+/**
+ * @defgroup GdsOutputRenderer GDS Output Renderer base class
+ * 
+ * The renderers are used to convert the cell structures read from the GDS layout file
+ * into different output formats.
+ * 
+ * The GdsOutputRenderer base class is used to derive all renderers from.
+ *
+ * @warning Although the GdsOutputRenderer class provides compatibility for asynchronous rendering,
+ * the class is not thread safe / re-entrant. Only use it from a signle context. Not even the rendering function called is allowed to modifiy this object.
+ * 
+ * A allowed function to be called from the async rendering thread is #gds_output_renderer_update_gui_status_from_async and the get functions for the properties.
+ *  
+ * @note The context that owned the renderer has to ensure that only one rendering is active at a time for a single instance of a renderer.
+ *
+ * By default this class implements the following features:
+ * 
+ * @subsection GdsOutputRendererProps Properties
+ * Property Name    | Description
+ * -----------------|----------------------------------------------------------------
+ * layer-settings   | LayerSettings object containing the layer rendering information
+ * output-file      | Output file name for rendering
+ *
+ * All these properties have to be set for rendering.
+ *
+ * @subsection GdsOutputRendererSignals Signals / Events
+ * Signal Name      | Description                                     | Callback prototype
+ * -----------------|-------------------------------------------------|-----------------------------------------------------------
+ * async-finished   | The asynchronous rendering is finished          | void callback(GdsOutputRenderer *src, gpointer user_data)
+ * progress-changed | The asynchronous rendering progress changed     | void callback(GdsOutputRenderer *src, const char *progress, gpointer user_data)
+ *
+ * @note The `char *progress` supplied to the callback function must not be modified or freed.
+ *
+ */

doxygen/latex-renderer.dox

@@ -1,4 +1,16 @@
 /**
  * @defgroup LaTeX-Renderer LaTeX/TikZ Renderer 
- * @ingroup renderers
+ * @ingroup GdsOutputRenderer
+ *
+ * This is the class implementing the Latex / tikz output rendering
+
+ * @subsection LaTeXRendererProps Properties
+ * This class inherits all properties from its parent @ref GdsOutputRenderer.
+ * In addition to that, it implements the following properties:
+ *
+ * Property Name    | Description
+ * -----------------|----------------------------------------------------------------
+ * standalone  | Configure output LaTeX document to be standalone compilable (requires standalone documentclass)
+ * pdf-layers | Create OCG layers in LaTeX output
+ *
  */

doxygen/renderers.dox

@@ -1,9 +0,0 @@
-/**
- * @defgroup renderers Output Renderers
- * 
- * The renderers are used to convert the cell structures read from the GDS layout file
- * into different output formats.
- * 
- * Currently the renders are statically implemented without the use of GObjects.
- * This will probably change in future releases in order to make it easier to integrate new rendering methods.
- */

gds-render-gui.c

@@ -47,6 +47,11 @@ enum gds_render_gui_signal_sig_ids {SIGNAL_WINDOW_CLOSED = 0, SIGNAL_COUNT};
 
 static guint gds_render_gui_signals[SIGNAL_COUNT];
 
+struct gui_button_states {
+	gboolean rendering_active;
+	gboolean valid_cell_selected;
+};
+
 struct _GdsRenderGui {
 	/* Parent GObject */
 	GObject parent;
@@ -54,6 +59,9 @@ struct _GdsRenderGui {
 	/* Custom fields */
 	GtkWindow *main_window;
 	GtkWidget *convert_button;
+	GtkWidget *open_button;
+	GtkWidget *load_layer_button;
+	GtkWidget *save_layer_button;
 	GtkTreeStore *cell_tree_store;
 	GtkWidget *cell_search_entry;
 	LayerSelector *layer_selector;
@@ -62,6 +70,7 @@ struct _GdsRenderGui {
 	ActivityBar *activity_status_bar;
 	struct render_settings render_dialog_settings;
 	ColorPalette *palette;
+	struct gui_button_states button_state_data;
 };
 
 G_DEFINE_TYPE(GdsRenderGui, gds_render_gui, G_TYPE_OBJECT)
@@ -240,6 +249,23 @@ end_destroy:
 	gtk_widget_destroy(open_dialog);
 }
 
+static void process_button_state_changes(GdsRenderGui *self)
+{
+	gboolean convert_button_state = FALSE;
+	gboolean open_gds_button_state = FALSE;
+
+	/* Calculate states */
+	if (!self->button_state_data.rendering_active) {
+		open_gds_button_state = TRUE;
+		if (self->button_state_data.valid_cell_selected)
+			convert_button_state = TRUE;
+	}
+
+	/* Apply states */
+	gtk_widget_set_sensitive(self->convert_button, convert_button_state);
+	gtk_widget_set_sensitive(self->open_button, open_gds_button_state);
+}
+
 /**
  * @brief Callback for auto coloring button
  * @param button
@@ -254,6 +280,29 @@ static void on_auto_color_clicked(gpointer button, gpointer user)
 	layer_selector_auto_color_layers(self->layer_selector, self->palette, 1.0);
 }
 
+static void async_rendering_finished_callback(GdsOutputRenderer *renderer, gpointer gui)
+{
+	GdsRenderGui *self;
+
+	self = RENDERER_GUI(gui);
+
+	self->button_state_data.rendering_active = FALSE;
+	process_button_state_changes(self);
+	activity_bar_set_ready(self->activity_status_bar);
+
+	g_object_unref(renderer);
+}
+
+static void async_rendering_status_update_callback(GdsOutputRenderer *renderer, const char *status_message, gpointer data)
+{
+	GdsRenderGui *gui;
+	(void)renderer;
+
+	gui = RENDERER_GUI(data);
+
+	activity_bar_set_busy(gui->activity_status_bar, status_message);
+}
+
 /**
  * @brief Convert button callback
  * @param button
@@ -283,6 +332,10 @@ static void on_convert_clicked(gpointer button, gpointer user)
 	if (!self)
 		return;
 
+	/* Abort if rendering is already active */
+	if (self->button_state_data.rendering_active == TRUE)
+		return;
+
 	sett = &self->render_dialog_settings;
 
 	/* Get selected cell */
@@ -369,16 +422,33 @@ static void on_convert_clicked(gpointer button, gpointer user)
 		case RENDERER_CAIROGRAPHICS_PDF:
 			render_engine = GDS_RENDER_OUTPUT_RENDERER(cairo_renderer_new_pdf());
 			break;
+		default:
+			/* Abort rendering */
+			render_engine = NULL;
+			break;
 		}
 
 		if (render_engine) {
 			gds_output_renderer_set_output_file(render_engine, file_name);
 			gds_output_renderer_set_layer_settings(render_engine, layer_settings);
+			/* Prevent user from overwriting library or triggering additional conversion */
+			self->button_state_data.rendering_active = TRUE;
+			process_button_state_changes(self);
 
+			g_signal_connect(render_engine, "async-finished", G_CALLBACK(async_rendering_finished_callback),
+					 self);
+
+			activity_bar_set_busy(self->activity_status_bar, "Rendering cell...");
 			/* TODO: Replace this with asynchronous rendering. However, this fixes issue #19 */
-			gds_output_renderer_render_output(render_engine, cell_to_render, sett->scale);
 
-			g_object_unref(render_engine);
+			g_signal_connect(render_engine, "progress-changed",
+					 G_CALLBACK(async_rendering_status_update_callback), self);
+			gds_output_renderer_render_output_async(render_engine, cell_to_render, sett->scale);
+
+
+			//self->button_state_data.rendering_active = FALSE;
+
+			//g_object_unref(render_engine);
 		}
 
 		g_free(file_name);
@@ -407,7 +477,6 @@ static void cell_tree_view_activated(gpointer tree_view, GtkTreePath *path,
 	on_convert_clicked(NULL, user);
 }
 
-
 /**
  * @brief Callback for cell-selection change event
  *
@@ -423,10 +492,12 @@ static void cell_selection_changed(GtkTreeSelection *sel, GdsRenderGui *self)
 
 	if (gtk_tree_selection_get_selected(sel, &model, &iter)) {
 		/* Node selected. Show button */
-		gtk_widget_set_sensitive(self->convert_button, TRUE);
+		self->button_state_data.valid_cell_selected = TRUE;
 	} else {
-		gtk_widget_set_sensitive(self->convert_button, FALSE);
+		self->button_state_data.valid_cell_selected = FALSE;
 	}
+
+	process_button_state_changes(self);
 }
 
 static void sort_up_callback(GtkWidget *widget, gpointer user)
@@ -466,6 +537,9 @@ static void gds_render_gui_dispose(GObject *gobject)
 	g_clear_object(&self->cell_search_entry);
 	g_clear_object(&self->activity_status_bar);
 	g_clear_object(&self->palette);
+	g_clear_object(&self->load_layer_button);
+	g_clear_object(&self->save_layer_button);
+	g_clear_object(&self->open_button);
 
 	if (self->main_window) {
 		g_signal_handlers_destroy(self->main_window);
@@ -521,7 +595,8 @@ static void gds_render_gui_init(GdsRenderGui *self)
 	self->cell_tree_store = cell_selector_stores->base_store;
 
 	self->main_window = GTK_WINDOW(gtk_builder_get_object(main_builder, "main-window"));
-	g_signal_connect(GTK_WIDGET(gtk_builder_get_object(main_builder, "button-load-gds")),
+	self->open_button = GTK_WIDGET(gtk_builder_get_object(main_builder, "button-load-gds"));
+	g_signal_connect(self->open_button,
 			 "clicked", G_CALLBACK(on_load_gds), (gpointer)self);
 
 	self->convert_button = GTK_WIDGET(gtk_builder_get_object(main_builder, "convert-button"));
@@ -550,11 +625,10 @@ static void gds_render_gui_init(GdsRenderGui *self)
 	g_signal_connect(sort_down_button, "clicked", G_CALLBACK(sort_down_callback), self);
 
 	/* Set buttons for loading and saving */
-	layer_selector_set_load_mapping_button(self->layer_selector,
+	self->load_layer_button = GTK_WIDGET(gtk_builder_get_object(main_builder, "button-load-mapping"));
-					       GTK_WIDGET(gtk_builder_get_object(main_builder, "button-load-mapping")),
+	self->save_layer_button = GTK_WIDGET(gtk_builder_get_object(main_builder, "button-save-mapping"));
-					       self->main_window);
+	layer_selector_set_load_mapping_button(self->layer_selector, self->load_layer_button, self->main_window);
-	layer_selector_set_save_mapping_button(self->layer_selector, GTK_WIDGET(gtk_builder_get_object(main_builder, "button-save-mapping")),
+	layer_selector_set_save_mapping_button(self->layer_selector, self->save_layer_button, self->main_window);
-					       self->main_window);
 
 	/* Connect delete-event */
 	g_signal_connect(GTK_WIDGET(self->main_window), "delete-event",
@@ -579,6 +653,10 @@ static void gds_render_gui_init(GdsRenderGui *self)
 
 	g_object_unref(main_builder);
 
+	/* Setup default button sensibility data */
+	self->button_state_data.rendering_active = FALSE;
+	self->button_state_data.valid_cell_selected = FALSE;
+
 	/* Reference all objects referenced by this object */
 	g_object_ref(self->activity_status_bar);
 	g_object_ref(self->main_window);
@@ -588,6 +666,9 @@ static void gds_render_gui_init(GdsRenderGui *self)
 	g_object_ref(self->cell_tree_store);
 	g_object_ref(self->cell_search_entry);
 	g_object_ref(self->palette);
+	g_object_ref(self->open_button);
+	g_object_ref(self->load_layer_button);
+	g_object_ref(self->save_layer_button);
 }
 
 GdsRenderGui *gds_render_gui_new()

geometric/vector-operations.c

@@ -33,7 +33,7 @@
 
 #include <gds-render/geometric/vector-operations.h>
 
-#define ABS_DBL(a) ((a) < 0 ? -(a) : (a))
+#define ABS_DBL(a) ((a) < 0.0 ? -(a) : (a))
 
 double vector_2d_scalar_multipy(struct vector_2d *a, struct vector_2d *b)
 {

include/gds-render/gds-utils/gds-types.h

@@ -58,7 +58,7 @@ enum graphics_type
 enum path_type {PATH_FLUSH = 0, PATH_ROUNDED = 1, PATH_SQUARED = 2}; /**< Path line caps */
 
 /**
- * @brief A point in the 2D plane. Sometimes references as vertex
+ * @brief A point in the 2D plane. Sometimes reffered to as vertex
  */
 struct gds_point {
 	int x;

include/gds-render/output-renderers/gds-output-renderer.h

@@ -144,6 +144,16 @@ void gds_output_renderer_set_layer_settings(GdsOutputRenderer *renderer, LayerSe
  */
 int gds_output_renderer_render_output_async(GdsOutputRenderer *renderer, struct gds_cell *cell, double scale);
 
+/**
+ * @brief This function emits the 'progress-changed' in the thread/context that triggered an asynchronous rendering
+ *
+ * If the rendering is not asynchronous, this function has no effect.
+ *
+ * @param renderer GdsOutputrenderer object
+ * @param status Status to supply to signal emission
+ */
+void gds_output_renderer_update_gui_status_from_async(GdsOutputRenderer *renderer, const char *status);
+
 G_END_DECLS
 
 #endif /* _GDS_OUTPUT_RENDERER_H_ */

include/gds-render/widgets/activity-bar.h

@@ -53,6 +53,14 @@ ActivityBar *activity_bar_new();
  */
 void activity_bar_set_ready(ActivityBar *bar);
 
+/**
+ * @brief Enable spinner and set \p text. If text is NULL, 'Working...' is displayed
+ * @param bar Activity bar object
+ * @param text Text to display, may be NULL
+
+ */
+void activity_bar_set_busy(ActivityBar *bar, const char *text);
+
 G_END_DECLS
 
 #endif /* __LAYER_ELEMENT_H__ */

layer/layer-info.c

@@ -39,9 +39,36 @@ static void layer_settings_init(LayerSettings *self)
 	self->layer_infos = NULL;
 }
 
+static void layer_info_delete_with_name(struct layer_info *const info)
+{
+	if (!info)
+		return;
+
+	if (info->name)
+		free(info->name);
+	free(info);
+}
+
+static void layer_settings_dispose(GObject *obj)
+{
+	LayerSettings *self;
+
+	self = GDS_RENDER_LAYER_SETTINGS(obj);
+
+	if (self->layer_infos) {
+		g_list_free_full(self->layer_infos, (GDestroyNotify)layer_info_delete_with_name);
+		self->layer_infos = NULL;
+	}
+
+	G_OBJECT_CLASS(layer_settings_parent_class)->dispose(obj);
+}
+
 static void layer_settings_class_init(LayerSettingsClass *klass)
 {
-	(void)klass;
+	GObjectClass *oclass;
+
+	oclass = G_OBJECT_CLASS(klass);
+	oclass->dispose = layer_settings_dispose;
 
 	return;
 }
@@ -76,16 +103,6 @@ static struct layer_info *layer_info_copy(const struct layer_info * const info)
 	return copy;
 }
 
-static void layer_info_delete_with_name(struct layer_info *const info)
-{
-	if (!info)
-		return;
-
-	if (info->name)
-		free(info->name);
-	free(info);
-}
-
 LayerSettings *layer_settings_new()
 {
 	return g_object_new(GDS_RENDER_TYPE_LAYER_SETTINGS, NULL);

output-renderers/cairo-renderer.c

@@ -400,6 +400,7 @@ static int cairo_renderer_render_output(GdsOutputRenderer *renderer,
 	else
 		pdf_file = output_file;
 
+	gds_output_renderer_update_gui_status_from_async(renderer, "Rendering Cairo Output...");
 	ret = cairo_renderer_render_cell_to_vector_file(cell, layer_infos, pdf_file, svg_file, scale);
 
 	if (settings)

output-renderers/external-renderer.c

@@ -50,6 +50,7 @@ G_DEFINE_TYPE(ExternalRenderer, external_renderer, GDS_RENDER_TYPE_OUTPUT_RENDER
  * @param toplevel_cell Cell to render
  * @param layer_info_list Layer information (Color etc.)
  * @param output_file Destination file
+ * @param scale the scaling value to scale the output cell down by.
  * @param so_path Path to shared object
  * @return 0 if successful
  */

output-renderers/gds-output-renderer.c

@@ -20,9 +20,6 @@
 /**
   * @file gds-output-renderer.c
   * @brief Base GObject class for output renderers
-  *
-  * All output renderers are derived from this class
-  *
   * @author Mario Hüttel <mario.huettel@gmx.net>
   */
 
@@ -38,13 +35,20 @@ struct renderer_params {
 		double scale;
 };
 
+struct idle_function_params {
+	GMutex message_lock;
+	char *status_message;
+};
+
 typedef struct {
 	gchar *output_file;
 	LayerSettings *layer_settings;
 	GMutex settings_lock;
 	gboolean mutex_init_status;
 	GTask *task;
+	GMainContext *main_context;
 	struct renderer_params async_params;
+	struct idle_function_params idle_function_parameters;
 	gpointer padding[11];
 } GdsOutputRendererPrivate;
 
@@ -56,7 +60,7 @@ enum {
 
 G_DEFINE_TYPE_WITH_PRIVATE(GdsOutputRenderer, gds_output_renderer, G_TYPE_OBJECT)
 
-enum gds_output_renderer_signal_ids {ASYNC_FINISHED = 0, ASYNC_PROGRESS_UPDATE, GDS_OUTPUT_RENDERER_SIGNAL_COUNT};
+enum gds_output_renderer_signal_ids {ASYNC_FINISHED = 0, ASYNC_PROGRESS_CHANGED, GDS_OUTPUT_RENDERER_SIGNAL_COUNT};
 static guint gds_output_renderer_signals[GDS_OUTPUT_RENDERER_SIGNAL_COUNT];
 
 static int gds_output_renderer_render_dummy(GdsOutputRenderer *renderer,
@@ -83,6 +87,11 @@ static void gds_output_renderer_dispose(GObject *self_obj)
 		g_mutex_lock(&priv->settings_lock);
 		g_mutex_unlock(&priv->settings_lock);
 		g_mutex_clear(&priv->settings_lock);
+
+		g_mutex_lock(&priv->idle_function_parameters.message_lock);
+		g_mutex_unlock(&priv->idle_function_parameters.message_lock);
+		g_mutex_clear(&priv->idle_function_parameters.message_lock);
+
 		priv->mutex_init_status = FALSE;
 	}
 
@@ -150,6 +159,7 @@ static GParamSpec *gds_output_renderer_properties[N_PROPERTIES] = {NULL};
 static void gds_output_renderer_class_init(GdsOutputRendererClass *klass)
 {
 	GObjectClass *oclass = G_OBJECT_CLASS(klass);
+	GType progress_changed_param_types[1] = {G_TYPE_POINTER};
 
 	klass->render_output = gds_output_renderer_render_dummy;
 
@@ -178,16 +188,16 @@ static void gds_output_renderer_class_init(GdsOutputRendererClass *klass)
 				      G_TYPE_NONE,
 				      0,
 				      NULL);
-	gds_output_renderer_signals[ASYNC_PROGRESS_UPDATE] =
+	gds_output_renderer_signals[ASYNC_PROGRESS_CHANGED] =
-			g_signal_newv("progress-update", GDS_RENDER_TYPE_OUTPUT_RENDERER,
+			g_signal_newv("progress-changed", GDS_RENDER_TYPE_OUTPUT_RENDERER,
 				      G_SIGNAL_RUN_LAST | G_SIGNAL_NO_RECURSE,
 				      NULL,
 				      NULL,
 				      NULL,
 				      NULL,
 				      G_TYPE_NONE,
-				      0,
+				      1,
-				      NULL);
+				      progress_changed_param_types);
 }
 
 void gds_output_renderer_init(GdsOutputRenderer *self)
@@ -200,7 +210,10 @@ void gds_output_renderer_init(GdsOutputRenderer *self)
 	priv->output_file = NULL;
 	priv->task = NULL;
 	priv->mutex_init_status = TRUE;
+	priv->main_context = NULL;
+	priv->idle_function_parameters.status_message = NULL;
 	g_mutex_init(&priv->settings_lock);
+	g_mutex_init(&priv->idle_function_parameters.message_lock);
 
 	return;
 }
@@ -321,9 +334,7 @@ static void gds_output_renderer_async_wrapper(GTask *task,
 		goto ret_from_task;
 	}
 
-	g_mutex_lock(&priv->settings_lock);
 	ret = gds_output_renderer_render_output(renderer, priv->async_params.cell, priv->async_params.scale);
-	g_mutex_unlock(&priv->settings_lock);
 
 ret_from_task:
 	g_task_return_int(task, ret);
@@ -337,8 +348,13 @@ static void gds_output_renderer_async_finished(GObject *src_obj, GAsyncResult *r
 
 	priv = gds_output_renderer_get_instance_private(GDS_RENDER_OUTPUT_RENDERER(src_obj));
 
+	priv->main_context = NULL;
+
 	g_signal_emit(src_obj, gds_output_renderer_signals[ASYNC_FINISHED], 0);
 	g_clear_object(&priv->task);
+
+	/* Clear reference set in gds_output_renderer_render_output_async() */
+	g_object_unref(src_obj);
 }
 
 int gds_output_renderer_render_output_async(GdsOutputRenderer *renderer, struct gds_cell *cell, double scale)
@@ -353,14 +369,82 @@ int gds_output_renderer_render_output_async(GdsOutputRenderer *renderer, struct
 	}
 
 	priv->task = g_task_new(renderer, NULL, gds_output_renderer_async_finished, NULL);
+	g_task_set_name(priv->task, "Rendering Thread");
+
 	g_mutex_lock(&priv->settings_lock);
 	priv->async_params.cell = cell;
 	priv->async_params.scale = scale;
+	priv->main_context = g_main_context_default();
 	g_mutex_unlock(&priv->settings_lock);
 
+	/* Self reference. This could end up being nasty... */
+	g_object_ref(renderer);
+
+	/* Do the magic */
 	g_task_run_in_thread(priv->task, gds_output_renderer_async_wrapper);
 
 	return ret;
 }
 
+static gboolean idle_event_processor_callback(gpointer user_data)
+{
+	GdsOutputRenderer *renderer;
+	GdsOutputRendererPrivate *priv;
+	char *status_message;
+
+	/* If the rendering is finished before the mainloop gets to this point
+	 * the renderer is already disposed. Catch this!
+	 */
+	if (!GDS_RENDER_IS_OUTPUT_RENDERER(user_data))
+		return FALSE;
+
+	renderer = GDS_RENDER_OUTPUT_RENDERER(user_data);
+	priv = gds_output_renderer_get_instance_private(renderer);
+
+	if (g_mutex_trylock(&priv->idle_function_parameters.message_lock)) {
+		status_message = priv->idle_function_parameters.status_message;
+		g_signal_emit(renderer, gds_output_renderer_signals[ASYNC_PROGRESS_CHANGED], 0, status_message);
+		g_free(priv->idle_function_parameters.status_message);
+		priv->idle_function_parameters.status_message = NULL;
+		g_mutex_unlock(&priv->idle_function_parameters.message_lock);
+	} else {
+		return TRUE;
+	}
+
+	return FALSE;
+}
+
+void gds_output_renderer_update_gui_status_from_async(GdsOutputRenderer *renderer, const char *status)
+{
+	GSource *idle_event_processor;
+	GdsOutputRendererPrivate *priv;
+	gboolean skip_source = FALSE;
+
+	g_return_if_fail(GDS_RENDER_IS_OUTPUT_RENDERER(renderer));
+	if (!status)
+		return;
+
+	priv = gds_output_renderer_get_instance_private(renderer);
+
+	/* If rendering is not async */
+	if (!priv->main_context)
+		return;
+
+	g_mutex_lock(&priv->idle_function_parameters.message_lock);
+	if (priv->idle_function_parameters.status_message) {
+		g_free(priv->idle_function_parameters.status_message);
+
+		/* Skip adding new idle source because there's already an active one */
+		skip_source = TRUE;
+	}
+	priv->idle_function_parameters.status_message = g_strdup(status);
+	g_mutex_unlock(&priv->idle_function_parameters.message_lock);
+
+	if (!skip_source) {
+		idle_event_processor = g_idle_source_new();
+		g_source_set_callback(idle_event_processor, idle_event_processor_callback, (gpointer)renderer, NULL);
+		g_source_attach(idle_event_processor, priv->main_context);
+	}
+}
+
 /** @} */

output-renderers/latex-renderer.c

@@ -29,10 +29,15 @@
 #include <gdk/gdk.h>
 #include <gds-render/layer/layer-info.h>
 /**
- * @addtogroup LatexRenderer
+ * @addtogroup LaTeX-Renderer
  * @{
  */
 
+/**
+ * @brief Struct representing the LaTeX-Renderer object.
+ *
+ * This struct holds the LaTeX renderer internal data. It is only used inside the @ref LatexRenderer class.
+ */
 struct _LatexRenderer {
 	GdsOutputRenderer parent;
 	gboolean tex_standalone;
@@ -226,13 +231,20 @@ static void generate_graphics(FILE *tex_file, GList *graphics, GList *linfo, GSt
  * @param tex_file File to write to
  * @param buffer Working buffer
  * @param scale Scale output down by this value
+ * @param renderer The current renderer as GdsOutputRenderer. This is used to emit the status updates to the GUI
  */
-static void render_cell(struct gds_cell *cell, GList *layer_infos, FILE *tex_file, GString *buffer, double scale)
+static void render_cell(struct gds_cell *cell, GList *layer_infos, FILE *tex_file, GString *buffer, double scale,
+			GdsOutputRenderer *renderer)
 {
-
+	GString *status;
 	GList *list_child;
 	struct gds_cell_instance *inst;
 
+	status = g_string_new(NULL);
+	g_string_printf(status, "Generating cell %s", cell->name);
+	gds_output_renderer_update_gui_status_from_async(renderer, status->str);
+	g_string_free(status, TRUE);
+
 	/* Draw polygons of current cell */
 	generate_graphics(tex_file, cell->graphic_objs, layer_infos, buffer, scale);
 
@@ -256,7 +268,7 @@ static void render_cell(struct gds_cell *cell, GList *layer_infos, FILE *tex_fil
 				inst->magnification);
 		WRITEOUT_BUFFER(buffer);
 
-		render_cell(inst->cell_ref, layer_infos, tex_file, buffer, scale);
+		render_cell(inst->cell_ref, layer_infos, tex_file, buffer, scale, renderer);
 
 		g_string_printf(buffer, "\\end{scope}\n");
 		WRITEOUT_BUFFER(buffer);
@@ -271,7 +283,7 @@ static void render_cell(struct gds_cell *cell, GList *layer_infos, FILE *tex_fil
 }
 
 static int latex_render_cell_to_code(struct gds_cell *cell, GList *layer_infos, FILE *tex_file, double scale,
-			       gboolean create_pdf_layers, gboolean standalone_document)
+			       gboolean create_pdf_layers, gboolean standalone_document, GdsOutputRenderer *renderer)
 {
 	GString *working_line;
 
@@ -304,7 +316,7 @@ static int latex_render_cell_to_code(struct gds_cell *cell, GList *layer_infos,
 	WRITEOUT_BUFFER(working_line);
 
 	/* Generate graphics output */
-	render_cell(cell, layer_infos, tex_file, working_line, scale);
+	render_cell(cell, layer_infos, tex_file, working_line, scale, renderer);
 
 
 	g_string_printf(working_line, "\\end{tikzpicture}\n");
@@ -344,7 +356,7 @@ static int latex_renderer_render_output(GdsOutputRenderer *renderer,
 	tex_file = fopen(output_file, "w");
 	if (tex_file) {
 		ret = latex_render_cell_to_code(cell, layer_infos, tex_file, scale,
-						l_renderer->pdf_layers, l_renderer->tex_standalone);
+						l_renderer->pdf_layers, l_renderer->tex_standalone, renderer);
 		fclose(tex_file);
 	} else {
 		g_error("Could not open LaTeX output file");

widgets/activity-bar.c

@@ -105,5 +105,11 @@ void activity_bar_set_ready(ActivityBar *bar)
 	gtk_spinner_stop(GTK_SPINNER(bar->spinner));
 }
 
+void activity_bar_set_busy(ActivityBar *bar, const char *text)
+{
+	gtk_label_set_text(GTK_LABEL(bar->label), (text ? text : "Working..."));
+	gtk_spinner_start(GTK_SPINNER(bar->spinner));
+}
+
 
 /** @} */