rework extras tab to use script system

scripts/postprocessing_codeformer.py

@@ -0,0 +1,36 @@
+from PIL import Image
+import numpy as np
+
+from modules import scripts_postprocessing, codeformer_model
+import gradio as gr
+
+from modules.ui_components import FormRow
+
+
+class ScriptPostprocessingCodeFormer(scripts_postprocessing.ScriptPostprocessing):
+    name = "CodeFormer"
+    order = 3000
+
+    def ui(self):
+        with FormRow():
+            codeformer_visibility = gr.Slider(minimum=0.0, maximum=1.0, step=0.001, label="CodeFormer visibility", value=0, elem_id="extras_codeformer_visibility")
+            codeformer_weight = gr.Slider(minimum=0.0, maximum=1.0, step=0.001, label="CodeFormer weight (0 = maximum effect, 1 = minimum effect)", value=0, elem_id="extras_codeformer_weight")
+
+        return {
+            "codeformer_visibility": codeformer_visibility,
+            "codeformer_weight": codeformer_weight,
+        }
+
+    def process(self, pp: scripts_postprocessing.PostprocessedImage, codeformer_visibility, codeformer_weight):
+        if codeformer_visibility == 0:
+            return
+
+        restored_img = codeformer_model.codeformer.restore(np.array(pp.image, dtype=np.uint8), w=codeformer_weight)
+        res = Image.fromarray(restored_img)
+
+        if codeformer_visibility < 1.0:
+            res = Image.blend(pp.image, res, codeformer_visibility)
+
+        pp.image = res
+        pp.info["CodeFormer visibility"] = round(codeformer_visibility, 3)
+        pp.info["CodeFormer weight"] = round(codeformer_weight, 3)