[nautilus/wip/antoniof/hidpi-and-icons-cleanup: 7/11] ui-utilities: Add filmholes using GdkSnapshot

[António Fernandes <antoniof src gnome org>]

commit 2dbe024775edf0e0670584375ce7253723cedd3c
Author: António Fernandes <antoniof gnome org>
Date:   Sun Aug 7 23:10:23 2022 +0100

    ui-utilities: Add filmholes using GdkSnapshot
    
    This can take advantage of GPU and prepares for next changes.

 src/nautilus-file.c         | 33 ++++++++++++++++++++------------
 src/nautilus-ui-utilities.c | 46 +++++++++++++++++++++++----------------------
 src/nautilus-ui-utilities.h |  4 +++-
 3 files changed, 48 insertions(+), 35 deletions(-)
---
diff --git a/src/nautilus-file.c b/src/nautilus-file.c
index 6b7d7f91c..2a63cd1cb 100644
--- a/src/nautilus-file.c
+++ b/src/nautilus-file.c
@@ -5146,6 +5146,7 @@ nautilus_file_get_thumbnail_icon (NautilusFile          *file,
                                   int                    scale,
                                   NautilusFileIconFlags  flags)
 {
+    g_autoptr (GdkPaintable) paintable = NULL;
     int modified_size;
     GdkPixbuf *pixbuf;
     int w, h, s;
@@ -5159,6 +5160,11 @@ nautilus_file_get_thumbnail_icon (NautilusFile          *file,
 
     if (file->details->thumbnail)
     {
+        gdouble texture_width;
+        gdouble texture_height;
+        g_autoptr (GdkTexture) texture = NULL;
+        g_autoptr (GtkSnapshot) snapshot = gtk_snapshot_new ();
+
         w = gdk_pixbuf_get_width (file->details->thumbnail);
         h = gdk_pixbuf_get_height (file->details->thumbnail);
 
@@ -5191,20 +5197,24 @@ nautilus_file_get_thumbnail_icon (NautilusFile          *file,
                                               MAX (h * thumb_scale, 1),
                                               GDK_INTERP_BILINEAR);
 
-            /* We don't want frames around small icons */
-            if (!gdk_pixbuf_get_has_alpha (file->details->thumbnail) || s >= 128 * scale)
-            {
-                if (nautilus_is_video_file (file))
-                {
-                    nautilus_ui_frame_video (&pixbuf);
-                }
-            }
-
             g_clear_object (&file->details->scaled_thumbnail);
             file->details->scaled_thumbnail = pixbuf;
             file->details->thumbnail_scale = thumb_scale;
         }
 
+        texture = gdk_texture_new_for_pixbuf (pixbuf);
+        texture_width = gdk_texture_get_width (texture);
+        texture_height = gdk_texture_get_height (texture);
+        gdk_paintable_snapshot (GDK_PAINTABLE (texture),
+                                GDK_SNAPSHOT (snapshot),
+                                texture_width, texture_height);
+        if (size >= NAUTILUS_GRID_ICON_SIZE_SMALL &&
+            nautilus_is_video_file (file))
+        {
+            nautilus_ui_frame_video (snapshot, texture_width, texture_height);
+        }
+        paintable = gtk_snapshot_to_paintable (snapshot, NULL);
+
         DEBUG ("Returning thumbnailed image, at size %d %d",
                (int) (w * thumb_scale), (int) (h * thumb_scale));
     }
@@ -5217,10 +5227,9 @@ nautilus_file_get_thumbnail_icon (NautilusFile          *file,
         nautilus_create_thumbnail (file);
     }
 
-    if (pixbuf != NULL)
+    if (paintable != NULL)
     {
-        g_autoptr (GdkTexture) texture = gdk_texture_new_for_pixbuf (pixbuf);
-        icon = nautilus_icon_info_new_for_paintable (GDK_PAINTABLE (texture), scale);
+        icon = nautilus_icon_info_new_for_paintable (paintable, scale);
     }
     else if (file->details->is_thumbnailing)
     {
diff --git a/src/nautilus-ui-utilities.c b/src/nautilus-ui-utilities.c
index 74bba91f2..d87422460 100644
--- a/src/nautilus-ui-utilities.c
+++ b/src/nautilus-ui-utilities.c
@@ -164,39 +164,41 @@ ensure_filmholes (void)
 }
 
 void
-nautilus_ui_frame_video (GdkPixbuf **pixbuf)
+nautilus_ui_frame_video (GtkSnapshot *snapshot,
+                         gdouble      width,
+                         gdouble      height)
 {
-    int width, height;
+    g_autoptr (GdkTexture) left_texture = NULL;
+    g_autoptr (GdkTexture) right_texture = NULL;
     int holes_width, holes_height;
-    int i;
 
     if (!ensure_filmholes ())
     {
         return;
     }
 
-    width = gdk_pixbuf_get_width (*pixbuf);
-    height = gdk_pixbuf_get_height (*pixbuf);
     holes_width = gdk_pixbuf_get_width (filmholes_left);
     holes_height = gdk_pixbuf_get_height (filmholes_left);
 
-    for (i = 0; i < height; i += holes_height)
-    {
-        gdk_pixbuf_composite (filmholes_left, *pixbuf, 0, i,
-                              MIN (width, holes_width),
-                              MIN (height - i, holes_height),
-                              0, i, 1, 1, GDK_INTERP_NEAREST, 255);
-    }
-
-    for (i = 0; i < height; i += holes_height)
-    {
-        gdk_pixbuf_composite (filmholes_right, *pixbuf,
-                              width - holes_width, i,
-                              MIN (width, holes_width),
-                              MIN (height - i, holes_height),
-                              width - holes_width, i,
-                              1, 1, GDK_INTERP_NEAREST, 255);
-    }
+    /* Left */
+    gtk_snapshot_push_repeat (snapshot,
+                              &GRAPHENE_RECT_INIT (0, 0, holes_width, height),
+                              NULL);
+    left_texture = gdk_texture_new_for_pixbuf (filmholes_left);
+    gtk_snapshot_append_texture (snapshot,
+                                 left_texture,
+                                 &GRAPHENE_RECT_INIT (0, 0, holes_width, holes_height));
+    gtk_snapshot_pop (snapshot);
+
+    /* Right */
+    gtk_snapshot_push_repeat (snapshot,
+                              &GRAPHENE_RECT_INIT (width - holes_width, 0, holes_width, height),
+                              NULL);
+    right_texture = gdk_texture_new_for_pixbuf (filmholes_right);
+    gtk_snapshot_append_texture (snapshot,
+                                 right_texture,
+                                 &GRAPHENE_RECT_INIT (width - holes_width, 0, holes_width, holes_height));
+    gtk_snapshot_pop (snapshot);
 }
 
 gboolean
diff --git a/src/nautilus-ui-utilities.h b/src/nautilus-ui-utilities.h
index 44af13586..f3df67f9c 100644
--- a/src/nautilus-ui-utilities.h
+++ b/src/nautilus-ui-utilities.h
@@ -35,7 +35,9 @@ void        nautilus_g_menu_replace_string_in_item  (GMenu             *menu,
                                                      const gchar       *attribute,
                                                      const gchar       *string);
 
-void        nautilus_ui_frame_video                 (GdkPixbuf        **pixbuf);
+void        nautilus_ui_frame_video                 (GtkSnapshot       *snapshot,
+                                                     gdouble            width,
+                                                     gdouble            height);
 
 gboolean    nautilus_date_time_is_between_dates     (GDateTime         *date,
                                                      GDateTime         *initial_date,