batch processing for img2img with an empty output directory, by request

modules/img2img.py

@@ -23,8 +23,10 @@ def process_batch(p, input_dir, output_dir, args):
 
     print(f"Will process {len(images)} images, creating {p.n_iter * p.batch_size} new images for each.")
 
+    save_normally = output_dir == ''
+
     p.do_not_save_grid = True
-    p.do_not_save_samples = True
+    p.do_not_save_samples = not save_normally
 
     state.job_count = len(images) * p.n_iter
 
@@ -48,7 +50,8 @@ def process_batch(p, input_dir, output_dir, args):
                 left, right = os.path.splitext(filename)
                 filename = f"{left}-{n}{right}"
 
-            processed_image.save(os.path.join(output_dir, filename))
+            if not save_normally:
+                processed_image.save(os.path.join(output_dir, filename))
 
 
 def img2img(mode: int, prompt: str, negative_prompt: str, prompt_style: str, prompt_style2: str, init_img, init_img_with_mask, init_img_inpaint, init_mask_inpaint, mask_mode, steps: int, sampler_index: int, mask_blur: int, inpainting_fill: int, restore_faces: bool, tiling: bool, n_iter: int, batch_size: int, cfg_scale: float, denoising_strength: float, seed: int, subseed: int, subseed_strength: float, seed_resize_from_h: int, seed_resize_from_w: int, seed_enable_extras: bool, height: int, width: int, resize_mode: int, inpaint_full_res: bool, inpaint_full_res_padding: int, inpainting_mask_invert: int, img2img_batch_input_dir: str, img2img_batch_output_dir: str, *args):