From 87e8b9a2ab3f033e7fdadbb2fe258857915980ac Mon Sep 17 00:00:00 2001
From: AUTOMATIC <16777216c@gmail.com>
Date: Fri, 16 Sep 2022 09:47:03 +0300
Subject: [PATCH] prevent replacing torch_randn globally (instead replacing
 k_diffusion.sampling.torch) and add a setting to disable this all

---
 modules/processing.py  |  2 +-
 modules/sd_samplers.py | 25 ++++++++++++++++++++-----
 modules/shared.py      |  3 ++-
 3 files changed, 23 insertions(+), 7 deletions(-)

diff --git a/modules/processing.py b/modules/processing.py
index aab72903..5abdfd7c 100644
--- a/modules/processing.py
+++ b/modules/processing.py
@@ -122,7 +122,7 @@ def slerp(val, low, high):
 def create_random_tensors(shape, seeds, subseeds=None, subseed_strength=0.0, seed_resize_from_h=0, seed_resize_from_w=0, p=None):
     xs = []
 
-    if p is not None and p.sampler is not None and len(seeds) > 1:
+    if p is not None and p.sampler is not None and len(seeds) > 1 and opts.enable_batch_seeds:
         sampler_noises = [[] for _ in range(p.sampler.number_of_needed_noises(p))]
     else:
         sampler_noises = None
diff --git a/modules/sd_samplers.py b/modules/sd_samplers.py
index f77fe43f..d478c5bc 100644
--- a/modules/sd_samplers.py
+++ b/modules/sd_samplers.py
@@ -175,7 +175,19 @@ def extended_trange(count, *args, **kwargs):
         shared.total_tqdm.update()
 
 
-original_randn_like = torch.randn_like
+class TorchHijack:
+    def __init__(self, kdiff_sampler):
+        self.kdiff_sampler = kdiff_sampler
+
+    def __getattr__(self, item):
+        if item == 'randn_like':
+            return self.kdiff_sampler.randn_like
+
+        if hasattr(torch, item):
+            return getattr(torch, item)
+
+        raise AttributeError("'{}' object has no attribute '{}'".format(type(self).__name__, item))
+
 
 class KDiffusionSampler:
     def __init__(self, funcname, sd_model):
@@ -186,8 +198,6 @@ class KDiffusionSampler:
         self.sampler_noises = None
         self.sampler_noise_index = 0
 
-        k_diffusion.sampling.torch.randn_like = self.randn_like
-
     def callback_state(self, d):
         store_latent(d["denoised"])
 
@@ -200,8 +210,7 @@ class KDiffusionSampler:
         if noise is not None and x.shape == noise.shape:
             res = noise
         else:
-            print('generating')
-            res = original_randn_like(x)
+            res = torch.randn_like(x)
 
         self.sampler_noise_index += 1
         return res
@@ -223,6 +232,9 @@ class KDiffusionSampler:
         if hasattr(k_diffusion.sampling, 'trange'):
             k_diffusion.sampling.trange = lambda *args, **kwargs: extended_trange(*args, **kwargs)
 
+        if self.sampler_noises is not None:
+            k_diffusion.sampling.torch = TorchHijack(self)
+
         return self.func(self.model_wrap_cfg, xi, sigma_sched, extra_args={'cond': conditioning, 'uncond': unconditional_conditioning, 'cond_scale': p.cfg_scale}, disable=False, callback=self.callback_state)
 
     def sample(self, p, x, conditioning, unconditional_conditioning):
@@ -232,6 +244,9 @@ class KDiffusionSampler:
         if hasattr(k_diffusion.sampling, 'trange'):
             k_diffusion.sampling.trange = lambda *args, **kwargs: extended_trange(*args, **kwargs)
 
+        if self.sampler_noises is not None:
+            k_diffusion.sampling.torch = TorchHijack(self)
+
         samples_ddim = self.func(self.model_wrap_cfg, x, sigmas, extra_args={'cond': conditioning, 'uncond': unconditional_conditioning, 'cond_scale': p.cfg_scale}, disable=False, callback=self.callback_state)
         return samples_ddim
 
diff --git a/modules/shared.py b/modules/shared.py
index bc39ad1c..ac870ec4 100644
--- a/modules/shared.py
+++ b/modules/shared.py
@@ -124,7 +124,8 @@ class Options:
         "add_model_hash_to_info": OptionInfo(False, "Add model hash to generation information"),
         "img2img_color_correction": OptionInfo(False, "Apply color correction to img2img results to match original colors."),
         "font": OptionInfo("", "Font for image grids that have text"),
-        "enable_emphasis": OptionInfo(True, "Use (text) to make model pay more attention to text text and [text] to make it pay less attention"),
+        "enable_emphasis": OptionInfo(True, "Use (text) to make model pay more attention to text and [text] to make it pay less attention"),
+        "enable_batch_seeds": OptionInfo(True, "Make K-diffusion samplers produce same images in a batch as when making a single image"),
         "save_txt": OptionInfo(False, "Create a text file next to every image with generation parameters."),
         "ESRGAN_tile": OptionInfo(192, "Tile size for upscaling. 0 = no tiling.", gr.Slider, {"minimum": 0, "maximum": 512, "step": 16}),
         "ESRGAN_tile_overlap": OptionInfo(8, "Tile overlap, in pixels for upscaling. Low values = visible seam.", gr.Slider, {"minimum": 0, "maximum": 48, "step": 1}),