save previews for extra networks in the selected format

extensions-builtin/Lora/ui_extra_networks_lora.py

@@ -22,7 +22,7 @@ class ExtraNetworksPageLora(ui_extra_networks.ExtraNetworksPage):
                 "description": self.find_description(path),
                 "search_term": self.search_terms_from_path(lora_on_disk.filename),
                 "prompt": json.dumps(f"<lora:{name}:") + " + opts.extra_networks_default_multiplier + " + json.dumps(">"),
-                "local_preview": path + ".png",
+                "local_preview": f"{path}.{shared.opts.samples_format}",
             }
 
     def allowed_directories_for_previews(self):

modules/ui_extra_networks.py

@@ -144,6 +144,9 @@ class ExtraNetworksPage:
         """
 
         preview_extensions = ["png", "jpg", "webp"]
+        if shared.opts.samples_format not in preview_extensions:
+            preview_extensions.append(shared.opts.samples_format)
+
         potential_files = sum([[path + "." + ext, path + ".preview." + ext] for ext in preview_extensions], [])
 
         for file in potential_files:

modules/ui_extra_networks_checkpoints.py

@@ -23,7 +23,7 @@ class ExtraNetworksPageCheckpoints(ui_extra_networks.ExtraNetworksPage):
                 "description": self.find_description(path),
                 "search_term": self.search_terms_from_path(checkpoint.filename) + " " + (checkpoint.sha256 or ""),
                 "onclick": '"' + html.escape(f"""return selectCheckpoint({json.dumps(name)})""") + '"',
-                "local_preview": path + ".png",
+                "local_preview": f"{path}.{shared.opts.samples_format}",
             }
 
     def allowed_directories_for_previews(self):

modules/ui_extra_networks_hypernets.py

@@ -22,7 +22,7 @@ class ExtraNetworksPageHypernetworks(ui_extra_networks.ExtraNetworksPage):
                 "description": self.find_description(path),
                 "search_term": self.search_terms_from_path(path),
                 "prompt": json.dumps(f"<hypernet:{name}:") + " + opts.extra_networks_default_multiplier + " + json.dumps(">"),
-                "local_preview": path + ".png",
+                "local_preview": f"{path}.preview.{shared.opts.samples_format}",
             }
 
     def allowed_directories_for_previews(self):

modules/ui_extra_networks_textual_inversion.py

@@ -1,7 +1,7 @@
 import json
 import os
 
-from modules import ui_extra_networks, sd_hijack
+from modules import ui_extra_networks, sd_hijack, shared
 
 
 class ExtraNetworksPageTextualInversion(ui_extra_networks.ExtraNetworksPage):
@@ -22,7 +22,7 @@ class ExtraNetworksPageTextualInversion(ui_extra_networks.ExtraNetworksPage):
                 "description": self.find_description(path),
                 "search_term": self.search_terms_from_path(embedding.filename),
                 "prompt": json.dumps(embedding.name),
-                "local_preview": path + ".preview.png",
+                "local_preview": f"{path}.preview.{shared.opts.samples_format}",
             }
 
     def allowed_directories_for_previews(self):