loopback moved to scripts, added support for multiple batches, changed to honor save grids and how grids in web setting

scripts/loopback.py

@@ -0,0 +1,78 @@
+import numpy as np
+from tqdm import trange
+
+import modules.scripts as scripts
+import gradio as gr
+
+from modules import processing, shared, sd_samplers, images
+from modules.processing import Processed
+from modules.sd_samplers import samplers
+from modules.shared import opts, cmd_opts, state
+
+class Script(scripts.Script):
+    def title(self):
+        return "Loopback"
+
+    def show(self, is_img2img):
+        return is_img2img
+
+    def ui(self, is_img2img):
+        loops = gr.Slider(minimum=1, maximum=32, step=1, label='Loops', value=4)
+        denoising_strength_change_factor = gr.Slider(minimum=0.9, maximum=1.1, step=0.01, label='Denoising strength change factor', value=1)
+
+        return [loops, denoising_strength_change_factor]
+
+    def run(self, p, loops, denoising_strength_change_factor):
+        processing.fix_seed(p)
+        batch_count = p.n_iter
+        p.extra_generation_params = {
+            "Denoising strength change factor": denoising_strength_change_factor,
+        }
+
+        p.batch_size = 1
+        p.n_iter = 1
+
+        output_images, info = None, None
+        initial_seed = None
+        initial_info = None
+
+        grids = []
+        all_images = []
+        state.job_count = loops * batch_count
+
+        for n in range(batch_count):
+            history = []
+
+            for i in range(loops):
+                p.n_iter = 1
+                p.batch_size = 1
+                p.do_not_save_grid = True
+
+                state.job = f"Iteration {i + 1}/{loops}, batch {n + 1}/{batch_count}"
+
+                processed = processing.process_images(p)
+
+                if initial_seed is None:
+                    initial_seed = processed.seed
+                    initial_info = processed.info
+
+                init_img = processed.images[0]
+
+                p.init_images = [init_img]
+                p.seed = processed.seed + 1
+                p.denoising_strength = min(max(p.denoising_strength * denoising_strength_change_factor, 0.1), 1)
+                history.append(processed.images[0])
+
+            grid = images.image_grid(history, rows=1)
+            if opts.grid_save:
+                images.save_image(grid, p.outpath_grids, "grid", initial_seed, p.prompt, opts.grid_format, info=info, short_filename=not opts.grid_extended_filename, grid=True, p=p)
+
+            grids.append(grid)
+            all_images += history
+
+        if opts.return_grid:
+            all_images = grids + all_images
+
+        processed = Processed(p, all_images, initial_seed, initial_info)
+
+        return processed