inpaint and txt2img working with ddim sampler

ldm/generate.py

@@ -655,6 +655,7 @@ class Generate:
 
         return init_image,init_mask
 
+    # lots o' repeated code here! Turn into a make_func()
     def _make_base(self):
         if not self.generators.get('base'):
             from ldm.invoke.generator import Generator
@@ -665,6 +666,7 @@ class Generate:
         if not self.generators.get('img2img'):
             from ldm.invoke.generator.img2img import Img2Img
             self.generators['img2img'] = Img2Img(self.model, self.precision)
+            self.generators['img2img'].free_gpu_mem = self.free_gpu_mem
         return self.generators['img2img']
 
     def _make_embiggen(self):
@@ -693,10 +695,13 @@ class Generate:
             self.generators['inpaint'] = Inpaint(self.model, self.precision)
         return self.generators['inpaint']
 
+    # "omnibus" supports the runwayML custom inpainting model, which does
+    # txt2img, img2img and inpainting using slight variations on the same code
     def _make_omnibus(self):
         if not self.generators.get('omnibus'):
             from ldm.invoke.generator.omnibus import Omnibus
             self.generators['omnibus'] = Omnibus(self.model, self.precision)
+            self.generators['omnibus'].free_gpu_mem = self.free_gpu_mem
         return self.generators['omnibus']
 
     def load_model(self):

ldm/invoke/generator/img2img.py

@@ -77,6 +77,9 @@ class Img2Img(Generator):
 
     def _image_to_tensor(self, image:Image, normalize:bool=True)->Tensor:
         image = np.array(image).astype(np.float32) / 255.0
+        if len(image.shape) == 2:  # 'L' image, as in a mask
+            image = image[None,None]
+        else:                      # 'RGB' image
             image = image[None].transpose(0, 3, 1, 2)
         image = torch.from_numpy(image)
         if normalize:

ldm/invoke/generator/omnibus.py

@@ -3,7 +3,7 @@
 import torch
 import numpy as  np
 from einops import repeat
-from PIL import Image
+from PIL import Image, ImageOps
 from ldm.invoke.generator.base import downsampling
 from ldm.invoke.generator.img2img import Img2Img
 from ldm.invoke.generator.txt2img import Txt2Img
@@ -44,7 +44,7 @@ class Omnibus(Img2Img,Txt2Img):
             init_image = self._image_to_tensor(init_image)
 
         if isinstance(mask_image, Image.Image):
-            mask_image = self._image_to_tensor(mask_image,normalize=False)
+            mask_image = self._image_to_tensor(ImageOps.invert(mask_image).convert('L'),normalize=False)
 
         t_enc = steps
 
@@ -53,10 +53,12 @@ class Omnibus(Img2Img,Txt2Img):
             
         elif init_image is not None: # img2img
             scope = choose_autocast(self.precision)
+
             with scope(self.model.device.type):
                 self.init_latent = self.model.get_first_stage_encoding(
                     self.model.encode_first_stage(init_image)
                 ) # move to latent space
+
             # create a completely black mask  (1s)
             mask_image = torch.ones(init_image.shape[0], 3, init_image.width, init_image.height, device=self.model.device)
             # and the masked image is just a copy of the original
@@ -64,8 +66,9 @@ class Omnibus(Img2Img,Txt2Img):
             t_enc = int(strength * steps)
 
         else: # txt2img
-            mask_image = torch.zeros(init_image.shape[0], 3, init_image.width, init_image.height, device=self.model.device)
+            init_image = torch.zeros(1, 3, width, height, device=self.model.device)
-            masked_image = mask_image
+            mask_image = torch.ones(1, 1, width, height, device=self.model.device)
+            masked_image = init_image
 
         model = self.model
 
@@ -103,7 +106,7 @@ class Omnibus(Img2Img,Txt2Img):
                     uc_full = {"c_concat": [c_cat], "c_crossattn": [uc_cross]}
                     shape = [model.channels, height//8, width//8]
 
-                    samples, = sampler.sample(
+                    samples, _ = sampler.sample(
                         batch_size = 1,
                         S = t_enc,
                         x_T = x_T,
@@ -136,6 +139,9 @@ class Omnibus(Img2Img,Txt2Img):
                 "mask": repeat(mask.to(device=device), "1 ... -> n ...", n=num_samples),
                 "masked_image": repeat(masked_image.to(device=device), "1 ... -> n ...", n=num_samples),
                 }
+        print(f'DEBUG: image = {batch["image"]} shape={batch["image"].shape}')
+        print(f'DEBUG: mask = {batch["mask"]} shape={batch["mask"].shape}')
+        print(f'DEBUG: masked_image = {batch["masked_image"]} shape={batch["masked_image"].shape}')
         return batch
 
     def get_noise(self, width:int, height:int):

ldm/models/diffusion/ddpm.py

@@ -2157,7 +2157,6 @@ class DiffusionWrapper(pl.LightningModule):
         ]
 
     def forward(self, x, t, c_concat: list = None, c_crossattn: list = None):
-        print(f'DEBUG (ddpm) c_concat = {c_concat}')
         if self.conditioning_key is None:
             out = self.diffusion_model(x, t)
         elif self.conditioning_key == 'concat':