--- ./src-copy/develop/imageop.c	2019-04-23 12:35:26.133780700 +0100
+++ ./src/develop/imageop.c	2019-04-25 19:56:42.886286400 +0100
@@ -68,6 +68,7 @@
 typedef enum dt_module_header_icons_t
 {
   DT_MODULE_SWITCH = 0,
+  DT_MODULE_ICON,		  // mak insert
   DT_MODULE_LABEL,
   DT_MODULE_INSTANCE,
   DT_MODULE_RESET,
@@ -1908,8 +1909,27 @@
   return FALSE;
 }
 
+// mak insert start
+static GdkPixbuf *load_image(const char *filename, int size)
+{
+  GError *error = NULL;
+  if(!g_file_test(filename, G_FILE_TEST_IS_REGULAR)) return NULL;
+
+  GdkPixbuf *pixbuf = dt_gdk_pixbuf_new_from_file_at_size(filename, size, size, &error);
+  if(!pixbuf)
+  {
+    fprintf(stderr, "error loading file `%s': %s\n", filename, error->message);
+    g_error_free(error);
+  }
+  return pixbuf;
+}
+
+static const uint8_t fallback_pixel[4] = { 0, 0, 0, 0 };
+// mak insert end
+
 GtkWidget *dt_iop_gui_get_expander(dt_iop_module_t *module)
 {
+  int bs = DT_PIXEL_APPLY_DPI(12);  // mak insert
   char tooltip[512];
 
   GtkWidget *header = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 0);
@@ -1936,7 +1956,50 @@
    * initialize the header widgets
    */
   GtkWidget *hw[DT_MODULE_LAST] = { NULL };
-
+  
+  // mak insert start
+  /* add module icon */
+  GdkPixbuf *pixbuf;
+  cairo_surface_t *surface;
+  char filename[PATH_MAX] = { 0 };
+  char datadir[PATH_MAX] = { 0 };
+  dt_loc_get_datadir(datadir, sizeof(datadir));
+
+  // make the icons a little more visible
+  #define ICON_SIZE (bs * 1.7)
+
+  snprintf(filename, sizeof(filename), "%s/pixmaps/plugins/darkroom/%s.svg", datadir, module->op);
+  pixbuf = load_image(filename, ICON_SIZE);
+  if(pixbuf) goto got_image;
+
+  snprintf(filename, sizeof(filename), "%s/pixmaps/plugins/darkroom/%s.png", datadir, module->op);
+  pixbuf = load_image(filename, ICON_SIZE);
+  if(pixbuf) goto got_image;
+
+  snprintf(filename, sizeof(filename), "%s/pixmaps/plugins/darkroom/template.svg", datadir);
+  pixbuf = load_image(filename, ICON_SIZE);
+  if(pixbuf) goto got_image;
+
+  snprintf(filename, sizeof(filename), "%s/pixmaps/plugins/darkroom/template.png", datadir);
+  pixbuf = load_image(filename, ICON_SIZE);
+  if(pixbuf) goto got_image;
+
+  #undef ICON_SIZE
+
+  // wow, we could neither load the SVG nor the PNG files. something is fucked up.
+  pixbuf = gdk_pixbuf_new_from_data(fallback_pixel, GDK_COLORSPACE_RGB, TRUE, 8, 1, 1, 4, NULL, NULL);
+
+got_image:
+  surface = dt_gdk_cairo_surface_create_from_pixbuf(pixbuf, 1, NULL);
+  hw[DT_MODULE_ICON] = gtk_image_new_from_surface(surface);
+  gtk_widget_set_margin_start(GTK_WIDGET(hw[DT_MODULE_ICON]), DT_PIXEL_APPLY_DPI(5));
+  gtk_widget_set_size_request(GTK_WIDGET(hw[DT_MODULE_ICON]), bs, bs);
+  gtk_widget_set_name(GTK_WIDGET(hw[DT_MODULE_ICON]), "iop-panel-icon");
+  cairo_surface_destroy(surface);
+  g_object_unref(pixbuf);
+  
+  // mak insert end
+  
   /* add module label */
   hw[DT_MODULE_LABEL] = gtk_label_new("");
   _iop_panel_label(hw[DT_MODULE_LABEL], module);
@@ -1960,7 +2023,6 @@
   g_signal_connect(G_OBJECT(hw[DT_MODULE_RESET]), "clicked", G_CALLBACK(dt_iop_gui_reset_callback), module);
   gtk_widget_set_name(GTK_WIDGET(hw[DT_MODULE_RESET]), "module-reset-button");
 
-
   /* add preset button if module has implementation */
   hw[DT_MODULE_PRESETS] = dtgtk_button_new(dtgtk_cairo_paint_presets, CPF_STYLE_FLAT | CPF_DO_NOT_USE_BORDER, NULL);
   module->presets_button = GTK_WIDGET(hw[DT_MODULE_PRESETS]);