Support HiDpi icons

Port the rendering of icons to cairo surfaces, so that we can apply the
GDK scale factor when rendering icons.

origin commit:
https://gitlab.gnome.org/GNOME/nautilus/commit/0d4555d7

11 files changed, 177 insertions, 122 deletions

diff --git a/libcaja-private/caja-autorun.c b/libcaja-private/caja-autorun.c
index 0c08004e..cc19d280 100644
--- a/libcaja-private/caja-autorun.c
+++ b/libcaja-private/caja-autorun.c
@@ -469,7 +469,7 @@ caja_autorun_prepare_combo_box (GtkWidget *combo_box,
     GtkListStore *list_store;
     GtkTreeIter iter;
     GdkPixbuf *pixbuf;
-    int icon_size;
+    int icon_size, icon_scale;
     int set_active;
     int n;
     int num_apps;
@@ -485,6 +485,7 @@ caja_autorun_prepare_combo_box (GtkWidget *combo_box,
     pref_ask = !pref_start_app && !pref_ignore && !pref_open_folder;
 
     icon_size = caja_get_icon_size_for_stock_size (GTK_ICON_SIZE_MENU);
+    icon_scale = gtk_widget_get_scale_factor (combo_box);
 
     set_active = -1;
     data = NULL;
@@ -594,7 +595,7 @@ caja_autorun_prepare_combo_box (GtkWidget *combo_box,
              */
 
             icon = g_app_info_get_icon (app_info);
-            icon_info = caja_icon_info_lookup (icon, icon_size);
+            icon_info = caja_icon_info_lookup (icon, icon_size, icon_scale);
             pixbuf = caja_icon_info_get_pixbuf_at_size (icon_info, icon_size);
             g_object_unref (icon_info);
 
@@ -935,7 +936,7 @@ do_autorun_for_content_type (GMount *mount, const char *x_content_type, CajaAuto
     GIcon *icon;
     GdkPixbuf *pixbuf;
     CajaIconInfo *icon_info;
-    int icon_size;
+    int icon_size, icon_scale;
     gboolean user_forced_dialog;
     gboolean pref_ask;
     gboolean pref_start_app;
@@ -999,7 +1000,8 @@ show_dialog:
 
     icon = g_mount_get_icon (mount);
     icon_size = caja_get_icon_size_for_stock_size (GTK_ICON_SIZE_DIALOG);
-    icon_info = caja_icon_info_lookup (icon, icon_size);
+    icon_scale = gtk_widget_get_scale_factor (dialog);
+    icon_info = caja_icon_info_lookup (icon, icon_size, icon_scale);
     pixbuf = caja_icon_info_get_pixbuf_at_size (icon_info, icon_size);
     g_object_unref (icon_info);
     g_object_unref (icon);
diff --git a/libcaja-private/caja-bookmark.c b/libcaja-private/caja-bookmark.c
index 700d8f68..0b50a719 100644
--- a/libcaja-private/caja-bookmark.c
+++ b/libcaja-private/caja-bookmark.c
@@ -220,7 +220,7 @@ caja_bookmark_get_pixbuf (CajaBookmark *bookmark,
     GdkPixbuf *result;
     GIcon *icon;
     CajaIconInfo *info;
-    int pixel_size;
+    int pixel_size, pixel_scale;
 
 
     g_return_val_if_fail (CAJA_IS_BOOKMARK (bookmark), NULL);
@@ -232,7 +232,8 @@ caja_bookmark_get_pixbuf (CajaBookmark *bookmark,
     }
 
     pixel_size = caja_get_icon_size_for_stock_size (stock_size);
-    info = caja_icon_info_lookup (icon, pixel_size);
+    pixel_scale = gdk_window_get_scale_factor (gdk_get_default_root_window ());
+    info = caja_icon_info_lookup (icon, pixel_size, pixel_scale);
     result = caja_icon_info_get_pixbuf_at_size (info, pixel_size);
     g_object_unref (info);
 
diff --git a/libcaja-private/caja-file-conflict-dialog.c b/libcaja-private/caja-file-conflict-dialog.c
index 2b9a7955..c51c626e 100644
--- a/libcaja-private/caja-file-conflict-dialog.c
+++ b/libcaja-private/caja-file-conflict-dialog.c
@@ -80,6 +80,7 @@ file_icons_changed (CajaFile *file,
     pixbuf = caja_file_get_icon_pixbuf (fcd->details->destination,
                                         CAJA_ICON_SIZE_LARGE,
                                         TRUE,
+                                        gtk_widget_get_scale_factor (fcd->details->dest_image),
                                         CAJA_FILE_ICON_FLAGS_USE_THUMBNAILS);
 
     gtk_image_set_from_pixbuf (GTK_IMAGE (fcd->details->dest_image), pixbuf);
@@ -88,6 +89,7 @@ file_icons_changed (CajaFile *file,
     pixbuf = caja_file_get_icon_pixbuf (fcd->details->source,
                                         CAJA_ICON_SIZE_LARGE,
                                         TRUE,
+                                        gtk_widget_get_scale_factor (fcd->details->src_image),
                                         CAJA_FILE_ICON_FLAGS_USE_THUMBNAILS);
 
     gtk_image_set_from_pixbuf (GTK_IMAGE (fcd->details->src_image), pixbuf);
@@ -239,6 +241,7 @@ file_list_ready_cb (GList *files,
     pixbuf = caja_file_get_icon_pixbuf (dest,
                                         CAJA_ICON_SIZE_LARGE,
                                         TRUE,
+                                        gtk_widget_get_scale_factor (fcd->details->titles_vbox),
                                         CAJA_FILE_ICON_FLAGS_USE_THUMBNAILS);
     details->dest_image = gtk_image_new_from_pixbuf (pixbuf);
     gtk_box_pack_start (GTK_BOX (details->first_hbox),
@@ -249,6 +252,7 @@ file_list_ready_cb (GList *files,
     pixbuf = caja_file_get_icon_pixbuf (src,
                                         CAJA_ICON_SIZE_LARGE,
                                         TRUE,
+                                        gtk_widget_get_scale_factor (fcd->details->titles_vbox),
                                         CAJA_FILE_ICON_FLAGS_USE_THUMBNAILS);
     details->src_image = gtk_image_new_from_pixbuf (pixbuf);
     gtk_box_pack_start (GTK_BOX (details->second_hbox),
diff --git a/libcaja-private/caja-file.c b/libcaja-private/caja-file.c
index 769ca822..667f74af 100644
--- a/libcaja-private/caja-file.c
+++ b/libcaja-private/caja-file.c
@@ -4288,6 +4288,7 @@ get_default_file_icon (CajaFileIconFlags flags)
 CajaIconInfo *
 caja_file_get_icon (CajaFile *file,
 			int size,
+			int scale,
 			CajaFileIconFlags flags)
 {
 	CajaIconInfo *icon;
@@ -4303,7 +4304,7 @@ caja_file_get_icon (CajaFile *file,
 	if (gicon) {
 		GdkPixbuf *pixbuf;
 
-		icon = caja_icon_info_lookup (gicon, size);
+		icon = caja_icon_info_lookup (gicon, size, scale);
 		g_object_unref (gicon);
 
 		pixbuf = caja_icon_info_get_pixbuf (icon);
@@ -4313,7 +4314,7 @@ caja_file_get_icon (CajaFile *file,
 			}
 			g_object_unref (icon);
 
-			icon = caja_icon_info_new_for_pixbuf (pixbuf);
+			icon = caja_icon_info_new_for_pixbuf (pixbuf, scale);
 			g_object_unref (pixbuf);
 		}
 
@@ -4329,7 +4330,7 @@ caja_file_get_icon (CajaFile *file,
 	    caja_file_should_show_thumbnail (file)) {
 		if (file->details->thumbnail) {
 			int w, h, s;
-			double scale;
+			double thumb_scale;
 
 			raw_pixbuf = g_object_ref (file->details->thumbnail);
 
@@ -4339,19 +4340,19 @@ caja_file_get_icon (CajaFile *file,
 			s = MAX (w, h);
 			/* Don't scale up small thumbnails in the standard view */
 			if (s <= cached_thumbnail_size) {
-				scale = (double)size / CAJA_ICON_SIZE_STANDARD;
+				thumb_scale = (double)size / CAJA_ICON_SIZE_STANDARD;
 			}
 			else {
-				scale = (double)modified_size / s;
+				thumb_scale = (double)modified_size / s;
 			}
 			/* Make sure that icons don't get smaller than CAJA_ICON_SIZE_SMALLEST */
-			if (s*scale <= CAJA_ICON_SIZE_SMALLEST) {
-				scale = (double) CAJA_ICON_SIZE_SMALLEST / s;
+			if (s*thumb_scale <= CAJA_ICON_SIZE_SMALLEST) {
+				thumb_scale = (double) CAJA_ICON_SIZE_SMALLEST / s;
 			}
 
 			scaled_pixbuf = gdk_pixbuf_scale_simple (raw_pixbuf,
-								 MAX (w * scale, 1),
-								 MAX (h * scale, 1),
+								 MAX (w * thumb_scale, 1),
+								 MAX (h * thumb_scale, 1),
 								 GDK_INTERP_BILINEAR);
 
 			/* Render frames only for thumbnails of non-image files 
@@ -4377,7 +4378,7 @@ caja_file_get_icon (CajaFile *file,
 				caja_file_invalidate_attributes (file, CAJA_FILE_ATTRIBUTE_THUMBNAIL);
 			}
 
-			icon = caja_icon_info_new_for_pixbuf (scaled_pixbuf);
+			icon = caja_icon_info_new_for_pixbuf (scaled_pixbuf, scale);
 			g_object_unref (scaled_pixbuf);
 			return icon;
 		} else if (file->details->thumbnail_path == NULL &&
@@ -4397,15 +4398,15 @@ caja_file_get_icon (CajaFile *file,
 		gicon = caja_file_get_gicon (file, flags);
 
 	if (gicon) {
-		icon = caja_icon_info_lookup (gicon, size);
+		icon = caja_icon_info_lookup (gicon, size, scale);
 		if (caja_icon_info_is_fallback (icon)) {
 			g_object_unref (icon);
-			icon = caja_icon_info_lookup (get_default_file_icon (flags), size);
+			icon = caja_icon_info_lookup (get_default_file_icon (flags), size, scale);
 		}
 		g_object_unref (gicon);
 		return icon;
 	} else {
-		return caja_icon_info_lookup (get_default_file_icon (flags), size);
+		return caja_icon_info_lookup (get_default_file_icon (flags), size, scale);
 	}
 }
 
@@ -4413,12 +4414,13 @@ GdkPixbuf *
 caja_file_get_icon_pixbuf (CajaFile *file,
 			       int size,
 			       gboolean force_size,
+			       int scale,
 			       CajaFileIconFlags flags)
 {
 	CajaIconInfo *info;
 	GdkPixbuf *pixbuf;
 
-	info = caja_file_get_icon (file, size, flags);
+	info = caja_file_get_icon (file, size, scale, flags);
 	if (force_size) {
 		pixbuf =  caja_icon_info_get_pixbuf_at_size (info, size);
 	} else {
@@ -6719,7 +6721,7 @@ caja_file_get_emblem_pixbufs (CajaFile *file,
 	for (l = icons; l != NULL; l = l->next) {
 		icon = l->data;
 
-		icon_info = caja_icon_info_lookup (icon, size);
+		icon_info = caja_icon_info_lookup (icon, size, 1);
 		if (force_size) {
 			pixbuf = caja_icon_info_get_pixbuf_nodefault_at_size (icon_info, size);
 		} else {
diff --git a/libcaja-private/caja-file.h b/libcaja-private/caja-file.h
index f94bbe33..6a30b618 100644
--- a/libcaja-private/caja-file.h
+++ b/libcaja-private/caja-file.h
@@ -453,10 +453,12 @@ GIcon *                 caja_file_get_gicon                         (CajaFile
         CajaFileIconFlags           flags);
 CajaIconInfo *      caja_file_get_icon                          (CajaFile                   *file,
         int                             size,
+        int                             scale,
         CajaFileIconFlags           flags);
 GdkPixbuf *             caja_file_get_icon_pixbuf                   (CajaFile                   *file,
         int                             size,
         gboolean                        force_size,
+        int                             scale,
         CajaFileIconFlags           flags);
 
 gboolean                caja_file_has_open_window                   (CajaFile                   *file);
diff --git a/libcaja-private/caja-icon-canvas-item.c b/libcaja-private/caja-icon-canvas-item.c
index 88908196..98551be4 100644
--- a/libcaja-private/caja-icon-canvas-item.c
+++ b/libcaja-private/caja-icon-canvas-item.c
@@ -83,7 +83,7 @@ struct CajaIconCanvasItemDetails
     /* The image, text, font. */
     double x, y;
     GdkPixbuf *pixbuf;
-    GdkPixbuf *rendered_pixbuf;
+    cairo_surface_t *rendered_surface;
     GList *emblem_pixbufs;
     char *editable_text;		/* Text that can be modified by a renaming function */
     char *additional_text;		/* Text that cannot be modifed, such as file size, etc. */
@@ -278,9 +278,9 @@ caja_icon_canvas_item_finalize (GObject *object)
     g_free (details->additional_text);
     g_free (details->attach_points);
 
-    if (details->rendered_pixbuf != NULL)
+    if (details->rendered_surface != NULL)
     {
-        g_object_unref (details->rendered_pixbuf);
+        g_object_unref (details->rendered_surface);
     }
 
     if (details->editable_text_layout != NULL)
@@ -498,6 +498,27 @@ caja_icon_canvas_item_get_property (GObject        *object,
     }
 }
 
+static void
+get_scaled_icon_size (CajaIconCanvasItem *item,
+		      gint *width,
+		      gint *height)
+{
+    EelCanvas *canvas;
+    GdkPixbuf *pixbuf = NULL;
+    gint scale;
+
+    if (item != NULL) {
+        canvas = EEL_CANVAS_ITEM (item)->canvas;
+        scale = gtk_widget_get_scale_factor (GTK_WIDGET (canvas));
+        pixbuf = item->details->pixbuf;
+    }
+
+    if (width)
+        *width = (pixbuf == NULL) ? 0 : (gdk_pixbuf_get_width (pixbuf) / scale);
+    if (height)
+        *height = (pixbuf == NULL) ? 0 : (gdk_pixbuf_get_height (pixbuf) / scale);
+}
+
 cairo_surface_t *
 caja_icon_canvas_item_get_drag_surface (CajaIconCanvasItem *item)
 {
@@ -506,6 +527,7 @@ caja_icon_canvas_item_get_drag_surface (CajaIconCanvasItem *item)
     EelCanvas *canvas;
     GdkScreen *screen;
     int width, height;
+    int pix_width, pix_height;
     int item_offset_x, item_offset_y;
     EelIRect icon_rect;
     EelIRect emblem_rect;
@@ -554,11 +576,12 @@ caja_icon_canvas_item_get_drag_surface (CajaIconCanvasItem *item)
                              item_offset_x, item_offset_y);
     cairo_surface_destroy (drag_surface);
 
+    get_scaled_icon_size (item, &pix_width, &pix_height);
 
     icon_rect.x0 = item_offset_x;
     icon_rect.y0 = item_offset_y;
-    icon_rect.x1 = item_offset_x + gdk_pixbuf_get_width (item->details->pixbuf);
-    icon_rect.y1 = item_offset_y + gdk_pixbuf_get_height (item->details->pixbuf);
+    icon_rect.x1 = item_offset_x + pix_width;
+    icon_rect.y1 = item_offset_y + pix_height;
 
     is_rtl = caja_icon_container_is_layout_rtl (CAJA_ICON_CONTAINER (canvas));
 
@@ -607,10 +630,10 @@ caja_icon_canvas_item_set_image (CajaIconCanvasItem *item,
     {
         g_object_unref (details->pixbuf);
     }
-    if (details->rendered_pixbuf != NULL)
+    if (details->rendered_surface != NULL)
     {
-        g_object_unref (details->rendered_pixbuf);
-        details->rendered_pixbuf = NULL;
+        cairo_surface_destroy (details->rendered_surface);
+        details->rendered_surface = NULL;
     }
 
     details->pixbuf = image;
@@ -1671,8 +1694,8 @@ draw_pixbuf (GdkPixbuf *pixbuf,
 }
 
 /* shared code to highlight or dim the passed-in pixbuf */
-static GdkPixbuf *
-real_map_pixbuf (CajaIconCanvasItem *icon_item)
+static cairo_surface_t *
+real_map_surface (CajaIconCanvasItem *icon_item)
 {
     EelCanvas *canvas;
     char *audio_filename;
@@ -1681,6 +1704,7 @@ real_map_pixbuf (CajaIconCanvasItem *icon_item)
     int emblem_size;
     GtkStyleContext *style;
     GdkRGBA color;
+    cairo_surface_t *surface;
 
     temp_pixbuf = icon_item->details->pixbuf;
     canvas = EEL_CANVAS_ITEM(icon_item)->canvas;
@@ -1758,13 +1782,18 @@ real_map_pixbuf (CajaIconCanvasItem *icon_item)
         g_object_unref (old_pixbuf);
     }
 
-    return temp_pixbuf;
+    surface = gdk_cairo_surface_create_from_pixbuf (temp_pixbuf,
+                                                    gtk_widget_get_scale_factor (GTK_WIDGET (canvas)),
+                                                    gtk_widget_get_window (GTK_WIDGET (canvas)));
+    g_object_unref (temp_pixbuf);
+
+    return surface;
 }
 
-static GdkPixbuf *
-map_pixbuf (CajaIconCanvasItem *icon_item)
+static cairo_surface_t *
+map_surface (CajaIconCanvasItem *icon_item)
 {
-    if (!(icon_item->details->rendered_pixbuf != NULL
+    if (!(icon_item->details->rendered_surface != NULL
             && icon_item->details->rendered_is_active == icon_item->details->is_active
             && icon_item->details->rendered_is_prelit == icon_item->details->is_prelit
             && icon_item->details->rendered_is_highlighted_for_selection == icon_item->details->is_highlighted_for_selection
@@ -1772,11 +1801,11 @@ map_pixbuf (CajaIconCanvasItem *icon_item)
             && icon_item->details->rendered_is_highlighted_for_clipboard == icon_item->details->is_highlighted_for_clipboard
             && (icon_item->details->is_highlighted_for_selection && icon_item->details->rendered_is_focused == gtk_widget_has_focus (GTK_WIDGET (EEL_CANVAS_ITEM (icon_item)->canvas)))))
     {
-        if (icon_item->details->rendered_pixbuf != NULL)
+        if (icon_item->details->rendered_surface != NULL)
         {
-            g_object_unref (icon_item->details->rendered_pixbuf);
+            cairo_surface_destroy (icon_item->details->rendered_surface);
         }
-        icon_item->details->rendered_pixbuf = real_map_pixbuf (icon_item);
+        icon_item->details->rendered_surface = real_map_surface (icon_item);
         icon_item->details->rendered_is_active = icon_item->details->is_active;
         icon_item->details->rendered_is_prelit = icon_item->details->is_prelit;
         icon_item->details->rendered_is_highlighted_for_selection = icon_item->details->is_highlighted_for_selection;
@@ -1785,9 +1814,9 @@ map_pixbuf (CajaIconCanvasItem *icon_item)
         icon_item->details->rendered_is_focused = gtk_widget_has_focus (GTK_WIDGET (EEL_CANVAS_ITEM (icon_item)->canvas));
     }
 
-    g_object_ref (icon_item->details->rendered_pixbuf);
+    cairo_surface_reference (icon_item->details->rendered_surface);
 
-    return icon_item->details->rendered_pixbuf;
+    return icon_item->details->rendered_surface;
 }
 
 static void
@@ -1863,7 +1892,8 @@ caja_icon_canvas_item_draw (EelCanvasItem *item,
     CajaIconCanvasItemDetails *details;
     EelIRect icon_rect, emblem_rect;
     EmblemLayout emblem_layout;
-    GdkPixbuf *emblem_pixbuf, *temp_pixbuf;
+    GdkPixbuf *emblem_pixbuf;
+    cairo_surface_t *temp_surface;
     GtkStyleContext *context;
 
     container = CAJA_ICON_CONTAINER (item->canvas);
@@ -1884,12 +1914,12 @@ caja_icon_canvas_item_draw (EelCanvasItem *item,
 
     icon_rect = icon_item->details->canvas_rect;
 
-    temp_pixbuf = map_pixbuf (icon_item);
+    temp_surface = map_surface (icon_item);
 
-    gtk_render_icon (context, cr,
-                     temp_pixbuf,
-                     icon_rect.x0, icon_rect.y0);
-    g_object_unref (temp_pixbuf);
+    gtk_render_icon_surface (context, cr,
+                             temp_surface,
+                             icon_rect.x0, icon_rect.y0);
+    cairo_surface_destroy (temp_surface);
 
     draw_embedded_text (icon_item, cr, icon_rect.x0, icon_rect.y0);
 
@@ -2360,6 +2390,7 @@ caja_icon_canvas_item_ensure_bounds_up_to_date (CajaIconCanvasItem *icon_item)
     EelIRect total_rect, total_rect_for_layout, total_rect_for_entire_text;
     EelCanvasItem *item;
     double pixels_per_unit;
+    gint width, height;
     EmblemLayout emblem_layout;
     GdkPixbuf *emblem_pixbuf;
     gboolean is_rtl;
@@ -2378,20 +2409,13 @@ caja_icon_canvas_item_ensure_bounds_up_to_date (CajaIconCanvasItem *icon_item)
         icon_rect.y0 = 0;
         icon_rect_raw.x0 = 0;
         icon_rect_raw.y0 = 0;
-        if (details->pixbuf == NULL)
-        {
-            icon_rect.x1 = icon_rect.x0;
-            icon_rect.y1 = icon_rect.y0;
-            icon_rect_raw.x1 = icon_rect_raw.x0;
-            icon_rect_raw.y1 = icon_rect_raw.y0;
-        }
-        else
-        {
-            icon_rect_raw.x1 = icon_rect_raw.x0 + gdk_pixbuf_get_width (details->pixbuf);
-            icon_rect_raw.y1 = icon_rect_raw.y0 + gdk_pixbuf_get_height (details->pixbuf);
-            icon_rect.x1 = icon_rect_raw.x1 / pixels_per_unit;
-            icon_rect.y1 = icon_rect_raw.y1 / pixels_per_unit;
-        }
+
+        get_scaled_icon_size (icon_item, &width, &height);
+
+        icon_rect_raw.x1 = icon_rect_raw.x0 + width;
+        icon_rect_raw.y1 = icon_rect_raw.y0 + height;
+        icon_rect.x1 = icon_rect_raw.x1 / pixels_per_unit;
+        icon_rect.y1 = icon_rect_raw.y1 / pixels_per_unit;
 
         /* Compute text rectangle. */
         text_rect = compute_text_rectangle (icon_item, icon_rect, FALSE, BOUNDS_USAGE_FOR_DISPLAY);
@@ -2430,18 +2454,17 @@ caja_icon_canvas_item_get_icon_rectangle (const CajaIconCanvasItem *item)
 {
     EelDRect rectangle;
     double pixels_per_unit;
-    GdkPixbuf *pixbuf;
+    gint width, height;
 
     g_return_val_if_fail (CAJA_IS_ICON_CANVAS_ITEM (item), eel_drect_empty);
 
     rectangle.x0 = item->details->x;
     rectangle.y0 = item->details->y;
 
-    pixbuf = item->details->pixbuf;
-
     pixels_per_unit = EEL_CANVAS_ITEM (item)->canvas->pixels_per_unit;
-    rectangle.x1 = rectangle.x0 + (pixbuf == NULL ? 0 : gdk_pixbuf_get_width (pixbuf)) / pixels_per_unit;
-    rectangle.y1 = rectangle.y0 + (pixbuf == NULL ? 0 : gdk_pixbuf_get_height (pixbuf)) / pixels_per_unit;
+    get_scaled_icon_size (EEL_CANVAS_ITEM (item), &width, &height);
+    rectangle.x1 = rectangle.x0 + width / pixels_per_unit;
+    rectangle.y1 = rectangle.y0 + height / pixels_per_unit;
 
     eel_canvas_item_i2w (EEL_CANVAS_ITEM (item),
                          &rectangle.x0,
@@ -2462,18 +2485,17 @@ caja_icon_canvas_item_get_text_rectangle (CajaIconCanvasItem *item,
     EelIRect text_rectangle;
     EelDRect ret;
     double pixels_per_unit;
-    GdkPixbuf *pixbuf;
+    gint width, height;
 
     g_return_val_if_fail (CAJA_IS_ICON_CANVAS_ITEM (item), eel_drect_empty);
 
     icon_rectangle.x0 = item->details->x;
     icon_rectangle.y0 = item->details->y;
 
-    pixbuf = item->details->pixbuf;
-
     pixels_per_unit = EEL_CANVAS_ITEM (item)->canvas->pixels_per_unit;
-    icon_rectangle.x1 = icon_rectangle.x0 + (pixbuf == NULL ? 0 : gdk_pixbuf_get_width (pixbuf)) / pixels_per_unit;
-    icon_rectangle.y1 = icon_rectangle.y0 + (pixbuf == NULL ? 0 : gdk_pixbuf_get_height (pixbuf)) / pixels_per_unit;
+    get_scaled_icon_size (item, &width, &height);
+    icon_rectangle.x1 = icon_rectangle.x0 + width / pixels_per_unit;
+    icon_rectangle.y1 = icon_rectangle.y0 + height / pixels_per_unit;
 
     measure_label_text (item);
 
@@ -2495,27 +2517,27 @@ caja_icon_canvas_item_get_text_rectangle (CajaIconCanvasItem *item,
     return ret;
 }
 
-
 /* Get the rectangle of the icon only, in canvas coordinates. */
 static void
 get_icon_canvas_rectangle (CajaIconCanvasItem *item,
                            EelIRect *rect)
 {
-    GdkPixbuf *pixbuf;
+    gint width, height;
 
     g_assert (CAJA_IS_ICON_CANVAS_ITEM (item));
     g_assert (rect != NULL);
 
+
     eel_canvas_w2c (EEL_CANVAS_ITEM (item)->canvas,
                     item->details->x,
                     item->details->y,
                     &rect->x0,
                     &rect->y0);
 
-    pixbuf = item->details->pixbuf;
+    get_scaled_icon_size (item, &width, &height);
 
-    rect->x1 = rect->x0 + (pixbuf == NULL ? 0 : gdk_pixbuf_get_width (pixbuf));
-    rect->y1 = rect->y0 + (pixbuf == NULL ? 0 : gdk_pixbuf_get_height (pixbuf));
+    rect->x1 = rect->x0 + width;
+    rect->y1 = rect->y0 + height;
 }
 
 void
@@ -3114,15 +3136,7 @@ caja_icon_canvas_item_accessible_get_image_size
 
     item = CAJA_ICON_CANVAS_ITEM (atk_gobject_accessible_get_object (ATK_GOBJECT_ACCESSIBLE (image)));
 
-    if (!item || !item->details->pixbuf)
-    {
-        *width = *height = 0;
-    }
-    else
-    {
-        *width = gdk_pixbuf_get_width (item->details->pixbuf);
-        *height = gdk_pixbuf_get_height (item->details->pixbuf);
-    }
+    get_scaled_icon_size (item, width, height);
 }
 
 static void
@@ -3224,7 +3238,7 @@ caja_icon_canvas_item_accessible_get_offset_at_point (AtkText	 *text,
     char *icon_text;
     gboolean have_editable;
     gboolean have_additional;
-    gint text_offset;
+    gint text_offset, height;
 
     atk_component_get_extents (ATK_COMPONENT (text), &real_x, &real_y,
                                &real_width, &real_height, coords);
@@ -3236,7 +3250,8 @@ caja_icon_canvas_item_accessible_get_offset_at_point (AtkText	 *text,
 
     if (item->details->pixbuf)
     {
-        y -= gdk_pixbuf_get_height (item->details->pixbuf);
+        get_scaled_icon_size (item, NULL, &height);
+        y -= height;
     }
     have_editable = item->details->editable_text != NULL &&
                     item->details->editable_text[0] != '\0';
@@ -3353,14 +3368,15 @@ caja_icon_canvas_item_accessible_get_character_extents (AtkText	   *text,
     PangoRectangle rect;
     PangoRectangle rect0;
     gboolean have_editable;
-    gint text_offset;
+    gint text_offset, pix_height;
 
     atk_component_get_extents (ATK_COMPONENT (text), &pos_x, &pos_y, NULL, NULL, coords);
     item = CAJA_ICON_CANVAS_ITEM (atk_gobject_accessible_get_object (ATK_GOBJECT_ACCESSIBLE (text)));
 
     if (item->details->pixbuf)
     {
-        pos_y += gdk_pixbuf_get_height (item->details->pixbuf);
+        get_scaled_icon_size (item, NULL, &pix_height);
+        pos_y += pix_height;
     }
 
     have_editable = item->details->editable_text != NULL &&
diff --git a/libcaja-private/caja-icon-info.c b/libcaja-private/caja-icon-info.c
index 3cb90c54..7c35f713 100644
--- a/libcaja-private/caja-icon-info.c
+++ b/libcaja-private/caja-icon-info.c
@@ -40,6 +40,8 @@ struct _CajaIconInfo
     GdkPoint *attach_points;
     char *display_name;
     char *icon_name;
+
+    gint  orig_scale;
 };
 
 struct _CajaIconInfoClass
@@ -121,7 +123,8 @@ caja_icon_info_class_init (CajaIconInfoClass *icon_info_class)
 }
 
 CajaIconInfo *
-caja_icon_info_new_for_pixbuf (GdkPixbuf *pixbuf)
+caja_icon_info_new_for_pixbuf (GdkPixbuf *pixbuf,
+                               gint       scale)
 {
     CajaIconInfo *icon;
 
@@ -132,11 +135,14 @@ caja_icon_info_new_for_pixbuf (GdkPixbuf *pixbuf)
         icon->pixbuf = g_object_ref (pixbuf);
     }
 
+    icon->orig_scale = scale;
+
     return icon;
 }
 
 static CajaIconInfo *
-caja_icon_info_new_for_icon_info (GtkIconInfo *icon_info)
+caja_icon_info_new_for_icon_info (GtkIconInfo *icon_info,
+                                  gint         scale)
 {
     CajaIconInfo *icon;
     GdkPoint *points;
@@ -171,6 +177,8 @@ caja_icon_info_new_for_icon_info (GtkIconInfo *icon_info)
         icon->icon_name = basename;
     }
 
+    icon->orig_scale = scale;
+
     return icon;
 }
 
@@ -347,7 +355,8 @@ themed_icon_key_free (ThemedIconKey *key)
 
 CajaIconInfo *
 caja_icon_info_lookup (GIcon *icon,
-                       int size)
+                       int size,
+                       int scale)
 {
     CajaIconInfo *icon_info;
     GdkPixbuf *pixbuf;
@@ -378,18 +387,19 @@ caja_icon_info_lookup (GIcon *icon,
 
         pixbuf = NULL;
         stream = g_loadable_icon_load (G_LOADABLE_ICON (icon),
-                                       size,
+                                       size * scale,
                                        NULL, NULL, NULL);
         if (stream)
         {
             pixbuf = gdk_pixbuf_new_from_stream_at_scale (stream,
-                                                          size, size, TRUE,
+                                                          size * scale, size * scale,
+                                                          TRUE,
                                                           NULL, NULL);
             g_input_stream_close (stream, NULL, NULL);
             g_object_unref (stream);
         }
 
-        icon_info = caja_icon_info_new_for_pixbuf (pixbuf);
+        icon_info = caja_icon_info_new_for_pixbuf (pixbuf, scale);
 
         key = loadable_icon_key_new (icon, size);
         g_hash_table_insert (loadable_icon_cache, key, icon_info);
@@ -417,17 +427,18 @@ caja_icon_info_lookup (GIcon *icon,
         names = g_themed_icon_get_names (G_THEMED_ICON (icon));
 
         icon_theme = gtk_icon_theme_get_default ();
-        gtkicon_info = gtk_icon_theme_choose_icon (icon_theme, (const char **)names, size, 0);
+        gtkicon_info = gtk_icon_theme_choose_icon_for_scale (icon_theme, (const char **)names,
+                                                             size, scale, 0);
 
         if (gtkicon_info == NULL)
         {
-            return caja_icon_info_new_for_pixbuf (NULL);
+            return caja_icon_info_new_for_pixbuf (NULL, scale);
         }
 
         filename = gtk_icon_info_get_filename (gtkicon_info);
         if (filename == NULL) {
             g_object_unref (gtkicon_info);
-            return caja_icon_info_new_for_pixbuf (NULL);
+            return caja_icon_info_new_for_pixbuf (NULL, scale);
         }
 
         lookup_key.filename = (char *)filename;
@@ -440,7 +451,7 @@ caja_icon_info_lookup (GIcon *icon,
             return g_object_ref (icon_info);
         }
 
-        icon_info = caja_icon_info_new_for_icon_info (gtkicon_info);
+        icon_info = caja_icon_info_new_for_icon_info (gtkicon_info, scale);
 
         key = themed_icon_key_new (filename, size);
         g_hash_table_insert (themed_icon_cache, key, icon_info);
@@ -454,9 +465,10 @@ caja_icon_info_lookup (GIcon *icon,
         GdkPixbuf *pixbuf;
         GtkIconInfo *gtk_icon_info;
 
-        gtk_icon_info = gtk_icon_theme_lookup_by_gicon (gtk_icon_theme_get_default (),
+        gtk_icon_info = gtk_icon_theme_lookup_by_gicon_for_scale (gtk_icon_theme_get_default (),
                         icon,
                         size,
+                        scale,
                         GTK_ICON_LOOKUP_FORCE_SIZE);
         if (gtk_icon_info != NULL)
         {
@@ -468,7 +480,7 @@ caja_icon_info_lookup (GIcon *icon,
             pixbuf = NULL;
         }
 
-        icon_info = caja_icon_info_new_for_pixbuf (pixbuf);
+        icon_info = caja_icon_info_new_for_pixbuf (pixbuf, scale);
 
         if (pixbuf != NULL) {
                 g_object_unref (pixbuf);
@@ -480,20 +492,22 @@ caja_icon_info_lookup (GIcon *icon,
 
 CajaIconInfo *
 caja_icon_info_lookup_from_name (const char *name,
-                                 int size)
+                                 int size,
+                                 int scale)
 {
     GIcon *icon;
     CajaIconInfo *info;
 
     icon = g_themed_icon_new (name);
-    info = caja_icon_info_lookup (icon, size);
+    info = caja_icon_info_lookup (icon, size, scale);
     g_object_unref (icon);
     return info;
 }
 
 CajaIconInfo *
 caja_icon_info_lookup_from_path (const char *path,
-                                 int size)
+                                 int size,
+                                 int scale)
 {
     GFile *icon_file;
     GIcon *icon;
@@ -501,7 +515,7 @@ caja_icon_info_lookup_from_path (const char *path,
 
     icon_file = g_file_new_for_path (path);
     icon = g_file_icon_new (icon_file);
-    info = caja_icon_info_lookup (icon, size);
+    info = caja_icon_info_lookup (icon, size, scale);
     g_object_unref (icon);
     g_object_unref (icon_file);
     return info;
@@ -568,8 +582,8 @@ caja_icon_info_get_pixbuf_nodefault_at_size (CajaIconInfo  *icon,
     if (pixbuf == NULL)
         return NULL;
 
-    w = gdk_pixbuf_get_width (pixbuf);
-    h = gdk_pixbuf_get_height (pixbuf);
+    w = gdk_pixbuf_get_width (pixbuf) / icon->orig_scale;
+    h = gdk_pixbuf_get_height (pixbuf) / icon->orig_scale;
     s = MAX (w, h);
     if (s == forced_size)
     {
@@ -595,8 +609,8 @@ caja_icon_info_get_pixbuf_at_size (CajaIconInfo  *icon,
 
     pixbuf = caja_icon_info_get_pixbuf (icon);
 
-    w = gdk_pixbuf_get_width (pixbuf);
-    h = gdk_pixbuf_get_height (pixbuf);
+    w = gdk_pixbuf_get_width (pixbuf) / icon->orig_scale;
+    h = gdk_pixbuf_get_height (pixbuf) / icon->orig_scale;
     s = MAX (w, h);
     if (s == forced_size)
     {
diff --git a/libcaja-private/caja-icon-info.h b/libcaja-private/caja-icon-info.h
index d4523d1a..d456e575 100644
--- a/libcaja-private/caja-icon-info.h
+++ b/libcaja-private/caja-icon-info.h
@@ -56,13 +56,17 @@ extern "C" {
 
     GType    caja_icon_info_get_type (void) G_GNUC_CONST;
 
-    CajaIconInfo *    caja_icon_info_new_for_pixbuf               (GdkPixbuf         *pixbuf);
+    CajaIconInfo *    caja_icon_info_new_for_pixbuf               (GdkPixbuf         *pixbuf,
+            int                scale);
     CajaIconInfo *    caja_icon_info_lookup                       (GIcon             *icon,
-            int                size);
+            int                size,
+            int                scale);
     CajaIconInfo *    caja_icon_info_lookup_from_name             (const char        *name,
-            int                size);
+            int                size,
+            int                scale);
     CajaIconInfo *    caja_icon_info_lookup_from_path             (const char        *path,
-            int                size);
+            int                size,
+            int                scale);
     gboolean              caja_icon_info_is_fallback                  (CajaIconInfo  *icon);
     GdkPixbuf *           caja_icon_info_get_pixbuf                   (CajaIconInfo  *icon);
     GdkPixbuf *           caja_icon_info_get_pixbuf_nodefault         (CajaIconInfo  *icon);
diff --git a/libcaja-private/caja-program-choosing.c b/libcaja-private/caja-program-choosing.c
index 27043583..a49a96e9 100644
--- a/libcaja-private/caja-program-choosing.c
+++ b/libcaja-private/caja-program-choosing.c
@@ -244,7 +244,9 @@ caja_launch_application_by_uri (GAppInfo *application,
     }
 
     file = caja_file_get_by_uri (uris->data);
-    icon = caja_file_get_icon (file, 48, 0);
+    icon = caja_file_get_icon (file,
+                               48, gtk_widget_get_scale_factor (GTK_WIDGET (parent_window)),
+                               0);
     caja_file_unref (file);
     if (icon)
     {
diff --git a/libcaja-private/caja-ui-utilities.c b/libcaja-private/caja-ui-utilities.c
index 8077e975..0bd096e1 100644
--- a/libcaja-private/caja-ui-utilities.c
+++ b/libcaja-private/caja-ui-utilities.c
@@ -138,18 +138,23 @@ extension_action_sensitive_callback (CajaMenuItem *item,
 }
 
 static GdkPixbuf *
-get_action_icon (const char *icon_name, int size)
+get_action_icon (const char *icon_name,
+                 int         size,
+                 GtkWidget  *parent_widget)
 {
     CajaIconInfo *info;
     GdkPixbuf *pixbuf;
+    int scale;
+
+    scale = gtk_widget_get_scale_factor (parent_widget);
 
     if (g_path_is_absolute (icon_name))
     {
-        info = caja_icon_info_lookup_from_path (icon_name, size);
+        info = caja_icon_info_lookup_from_path (icon_name, size, scale);
     }
     else
     {
-        info = caja_icon_info_lookup_from_name (icon_name, size);
+        info = caja_icon_info_lookup_from_name (icon_name, size, scale);
     }
     pixbuf = caja_icon_info_get_pixbuf_nodefault_at_size (info, size);
     g_object_unref (info);
@@ -158,7 +163,8 @@ get_action_icon (const char *icon_name, int size)
 }
 
 GtkAction *
-caja_action_from_menu_item (CajaMenuItem *item)
+caja_action_from_menu_item (CajaMenuItem *item,
+                            GtkWidget    *parent_widget)
 {
     char *name, *label, *tip, *icon_name;
     gboolean sensitive, priority;
@@ -180,7 +186,8 @@ caja_action_from_menu_item (CajaMenuItem *item)
     if (icon_name != NULL)
     {
         pixbuf = get_action_icon (icon_name,
-                                  caja_get_icon_size_for_stock_size (GTK_ICON_SIZE_MENU));
+                                  caja_get_icon_size_for_stock_size (GTK_ICON_SIZE_MENU),
+                                  parent_widget);
         if (pixbuf != NULL)
         {
             g_object_set_data_full (G_OBJECT (action), "menu-icon",
@@ -206,7 +213,7 @@ caja_action_from_menu_item (CajaMenuItem *item)
 }
 
 GtkAction *
-caja_toolbar_action_from_menu_item (CajaMenuItem *item)
+caja_toolbar_action_from_menu_item (CajaMenuItem *item, GtkWidget *parent_widget)
 {
     char *name, *label, *tip, *icon_name;
     gboolean sensitive, priority;
@@ -228,7 +235,8 @@ caja_toolbar_action_from_menu_item (CajaMenuItem *item)
     if (icon_name != NULL)
     {
         pixbuf = get_action_icon (icon_name,
-                                  caja_get_icon_size_for_stock_size (GTK_ICON_SIZE_LARGE_TOOLBAR));
+                                  caja_get_icon_size_for_stock_size (GTK_ICON_SIZE_LARGE_TOOLBAR),
+                                  parent_widget);
         if (pixbuf != NULL)
         {
             g_object_set_data_full (G_OBJECT (action), "toolbar-icon",
diff --git a/libcaja-private/caja-ui-utilities.h b/libcaja-private/caja-ui-utilities.h
index 7fed1f5e..c7a8d595 100644
--- a/libcaja-private/caja-ui-utilities.h
+++ b/libcaja-private/caja-ui-utilities.h
@@ -36,8 +36,8 @@ void        caja_ui_prepare_merge_ui           (GtkUIManager      *ui_manager,
         const char        *name,
         guint             *merge_id,
         GtkActionGroup   **action_group);
-GtkAction * caja_action_from_menu_item         (CajaMenuItem  *item);
-GtkAction * caja_toolbar_action_from_menu_item (CajaMenuItem  *item);
+GtkAction * caja_action_from_menu_item         (CajaMenuItem  *item, GtkWidget *parent_widget);
+GtkAction * caja_toolbar_action_from_menu_item (CajaMenuItem  *item, GtkWidget *parent_widget);
 const char *caja_ui_string_get                 (const char        *filename);
 void   caja_ui_frame_image                     (GdkPixbuf        **pixbuf);