From 1bfec873fa13d803f3d4ac2a12bf6983838233fe Mon Sep 17 00:00:00 2001
From: AUTOMATIC <16777216c@gmail.com>
Date: Wed, 25 Jan 2023 11:29:46 +0300
Subject: [PATCH] add an experimental option to apply loras to outputs rather
 than inputs

---
 extensions-builtin/Lora/lora.py                | 5 ++++-
 extensions-builtin/Lora/scripts/lora_script.py | 7 ++++++-
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/extensions-builtin/Lora/lora.py b/extensions-builtin/Lora/lora.py
index 137e58f7..cb8f1d36 100644
--- a/extensions-builtin/Lora/lora.py
+++ b/extensions-builtin/Lora/lora.py
@@ -166,7 +166,10 @@ def lora_forward(module, input, res):
     for lora in loaded_loras:
         module = lora.modules.get(lora_layer_name, None)
         if module is not None:
-            res = res + module.up(module.down(input)) * lora.multiplier * (module.alpha / module.up.weight.shape[1] if module.alpha else 1.0)
+            if shared.opts.lora_apply_to_outputs and res.shape == input.shape:
+                res = res + module.up(module.down(res)) * lora.multiplier * (module.alpha / module.up.weight.shape[1] if module.alpha else 1.0)
+            else:
+                res = res + module.up(module.down(input)) * lora.multiplier * (module.alpha / module.up.weight.shape[1] if module.alpha else 1.0)
 
     return res
 
diff --git a/extensions-builtin/Lora/scripts/lora_script.py b/extensions-builtin/Lora/scripts/lora_script.py
index 60b9eb64..544b228d 100644
--- a/extensions-builtin/Lora/scripts/lora_script.py
+++ b/extensions-builtin/Lora/scripts/lora_script.py
@@ -3,7 +3,7 @@ import torch
 import lora
 import extra_networks_lora
 import ui_extra_networks_lora
-from modules import script_callbacks, ui_extra_networks, extra_networks
+from modules import script_callbacks, ui_extra_networks, extra_networks, shared
 
 
 def unload():
@@ -28,3 +28,8 @@ torch.nn.Conv2d.forward = lora.lora_Conv2d_forward
 script_callbacks.on_model_loaded(lora.assign_lora_names_to_compvis_modules)
 script_callbacks.on_script_unloaded(unload)
 script_callbacks.on_before_ui(before_ui)
+
+
+shared.options_templates.update(shared.options_section(('extra_networks', "Extra Networks"), {
+    "lora_apply_to_outputs": shared.OptionInfo(False, "Apply Lora to outputs rather than inputs when possible (experimental)"),
+}))