Update nodes.py

Fix image preview UI bug on Save Tiff and Save EXR

Add new nodes: Save Latent EXR, Load Latent EXR

nodes.py

@@ -1,3 +1,4 @@
+import torch
 import os
 import sys
 
@@ -44,11 +45,11 @@ class SaveTiff:
             img = np.clip(i, 0, 65535).astype(np.uint16)
             file = f"{filename}_{counter:05}_.tiff"
             imageio.imwrite(os.path.join(full_output_folder, file), img)
-            results.append({
-                "filename": file,
-                "subfolder": subfolder,
-                "type": self.type
-            })
+            #results.append({
+            #    "filename": file,
+            #    "subfolder": subfolder,
+            #    "type": self.type
+            #})
             counter += 1
 
         return { "ui": { "images": results } }
@@ -89,21 +90,100 @@ class SaveEXR:
             
             file = f"{filename}_{counter:05}_.exr"
             imageio.imwrite(os.path.join(full_output_folder, file), linear)
-            results.append({
-                "filename": file,
-                "subfolder": subfolder,
-                "type": self.type
-            })
+            #results.append({
+            #    "filename": file,
+            #    "subfolder": subfolder,
+            #    "type": self.type
+            #})
             counter += 1
 
         return { "ui": { "images": results } }
 
+class SaveLatentEXR:
+    def __init__(self):
+        self.output_dir = folder_paths.get_output_directory()
+
+    @classmethod
+    def INPUT_TYPES(s):
+        return {"required": { "samples": ("LATENT", ),
+                              "filename_prefix": ("STRING", {"default": "latents/ComfyUI"})},
+                "hidden": {"prompt": "PROMPT", "extra_pnginfo": "EXTRA_PNGINFO"},
+                }
+    RETURN_TYPES = ()
+    FUNCTION = "save"
+
+    OUTPUT_NODE = True
+
+    CATEGORY = "latent"
+
+    def save(self, samples, filename_prefix="ComfyUI", prompt=None, extra_pnginfo=None):
+        full_output_folder, filename, counter, subfolder, filename_prefix = folder_paths.get_save_image_path(filename_prefix, self.output_dir)
+
+        file = f"{filename}_{counter:05}_.exr"
+
+        results = list()
+        #results.append({
+        #    "filename": file,
+        #    "subfolder": subfolder,
+        #    "type": "output"
+        #})
+        counter += 1
+        
+        file = os.path.join(full_output_folder, file)
+        sample = torch.squeeze(samples["samples"], 0) # squeeze from [1, 4, x, y] to [4, x, y]
+        output = torch.movedim(sample, 0, 2)          # and then reshape to [x, y, 4]
+        imageio.imwrite(file, output)
+        return { "ui": { "latents": results } }
+
+class LoadLatentEXR:
+    @classmethod
+    def INPUT_TYPES(s):
+        input_dir = folder_paths.get_input_directory()
+        files = [f for f in os.listdir(input_dir) if os.path.isfile(os.path.join(input_dir, f)) and f.endswith(".exr")]
+        return {
+                "required": {
+                    "latent": (sorted(files), {"image_upload": True}),
+                },
+            }
+
+    CATEGORY = "latent"
+
+    RETURN_TYPES = ("LATENT", )
+    FUNCTION = "load"
+
+    def load(self, latent):
+        latent_path = folder_paths.get_annotated_filepath(latent)
+        read = imageio.imread(latent_path, flags=12) # freeimage FIT_RGBAF=12
+        latent = torch.from_numpy(read).float()
+        latent = torch.movedim(latent, 2, 0)         # reshape from [x, y, 4] to [4, x, y]
+        latent = torch.unsqueeze(latent, 0)          # and then to [1, 4, x, y]
+        samples = {"samples": latent}
+        return (samples, )
+
+    @classmethod
+    def IS_CHANGED(s, latent):
+        image_path = folder_paths.get_annotated_filepath(latent)
+        m = hashlib.sha256()
+        with open(image_path, 'rb') as f:
+            m.update(f.read())
+        return m.digest().hex()
+
+    @classmethod
+    def VALIDATE_INPUTS(s, latent):
+        if not folder_paths.exists_annotated_filepath(latent):
+                return "Invalid latent file: {}".format(latent)
+        return True
+
 NODE_CLASS_MAPPINGS = {
     "SaveTiff": SaveTiff,
     "SaveEXR": SaveEXR,
+    "SaveLatentEXR": SaveLatentEXR,
+    "LoadLatentEXR": LoadLatentEXR,
 }
 
 NODE_DISPLAY_NAME_MAPPINGS = {
     "SaveTiff": "Save Tiff",
     "SaveEXR": "Save EXR",
-}
+    "SaveLatentEXR": "Save Latent EXR",
+    "LoadLatentEXR": "Load Latent EXR",
+}