txt2img Hires Fix

modules/processing.py

@@ -268,6 +268,7 @@ class Processed:
         self.height = p.height
         self.sampler_name = p.sampler_name
         self.cfg_scale = p.cfg_scale
+        self.image_cfg_scale = getattr(p, 'image_cfg_scale', None)
         self.steps = p.steps
         self.batch_size = p.batch_size
         self.restore_faces = p.restore_faces

modules/sd_samplers_kdiffusion.py

@@ -352,7 +352,7 @@ class KDiffusionSampler:
             'cond_scale': p.cfg_scale,
         }
 
-        if p.image_cfg_scale:
+        if hasattr(p, 'image_cfg_scale'):
             extra_args['image_cfg_scale'] = p.image_cfg_scale
 
         samples = self.launch_sampling(t_enc + 1, lambda: self.func(self.model_wrap_cfg, xi, extra_args=extra_args, disable=False, callback=self.callback_state, **extra_params_kwargs))