Update nodes.py

nodes.py

@@ -4,6 +4,9 @@ import torch.nn.functional as F
 import scipy.ndimage
 import numpy as np
 from PIL import ImageColor, Image, ImageDraw, ImageFont
+from PIL.PngImagePlugin import PngInfo
+import json
+import re
 import os
 import librosa
 from scipy.special import erf
@@ -11,6 +14,8 @@ from .fluid import Fluid
 import comfy.model_management
 import math
 from nodes import MAX_RESOLUTION
+import folder_paths
+from comfy.cli_args import args
 
 script_dir = os.path.dirname(os.path.abspath(__file__))
 
@@ -999,6 +1004,79 @@ class ColorMatch:
             out.append(torch.from_numpy(image_result))
         return (torch.stack(out, dim=0).to(torch.float32), )
     
+class SaveImageWithAlpha:
+    def __init__(self):
+        self.output_dir = folder_paths.get_output_directory()
+        self.type = "output"
+        self.prefix_append = ""
+
+    @classmethod
+    def INPUT_TYPES(s):
+        return {"required": 
+                    {"images": ("IMAGE", ),
+                    "mask": ("MASK", ),
+                    "filename_prefix": ("STRING", {"default": "ComfyUI"})},
+                "hidden": {"prompt": "PROMPT", "extra_pnginfo": "EXTRA_PNGINFO"},
+                }
+
+    RETURN_TYPES = ()
+    FUNCTION = "save_images_alpha"
+
+    OUTPUT_NODE = True
+
+    CATEGORY = "image"
+
+    def save_images_alpha(self, images, mask, filename_prefix="ComfyUI_image_with_alpha", prompt=None, extra_pnginfo=None):
+        filename_prefix += self.prefix_append
+        full_output_folder, filename, counter, subfolder, filename_prefix = folder_paths.get_save_image_path(filename_prefix, self.output_dir, images[0].shape[1], images[0].shape[0])
+        results = list()
+
+        def file_counter():
+            max_counter = 0
+            # Loop through the existing files
+            for existing_file in os.listdir(full_output_folder):
+                # Check if the file matches the expected format
+                match = re.fullmatch(f"{filename}_(\d+)_?\.[a-zA-Z0-9]+", existing_file)
+                if match:
+                    # Extract the numeric portion of the filename
+                    file_counter = int(match.group(1))
+                    # Update the maximum counter value if necessary
+                    if file_counter > max_counter:
+                        max_counter = file_counter
+            return max_counter
+
+        for image, alpha in zip(images, mask):
+            i = 255. * image.cpu().numpy()
+            a = 255. * alpha.cpu().numpy()
+            img = Image.fromarray(np.clip(i, 0, 255).astype(np.uint8))
+            
+            if a.shape == img.size[::-1]:  # Check if the mask has the same size as the image
+                print("Applying mask")
+                a = np.clip(a, 0, 255).astype(np.uint8)
+                img.putalpha(Image.fromarray(a, mode='L'))
+            else:
+                raise ValueError("SaveImageWithAlpha: Mask size does not match")
+            metadata = None
+            if not args.disable_metadata:
+                metadata = PngInfo()
+                if prompt is not None:
+                    metadata.add_text("prompt", json.dumps(prompt))
+                if extra_pnginfo is not None:
+                    for x in extra_pnginfo:
+                        metadata.add_text(x, json.dumps(extra_pnginfo[x]))
+           
+            # Increment the counter by 1 to get the next available value
+            counter = file_counter() + 1
+            file = f"{filename}_{counter:05}.png"
+            img.save(os.path.join(full_output_folder, file), pnginfo=metadata, compress_level=4)
+            results.append({
+                "filename": file,
+                "subfolder": subfolder,
+                "type": self.type
+            })
+
+        return { "ui": { "images": results } }
+    
 NODE_CLASS_MAPPINGS = {
     "INTConstant": INTConstant,
     "FloatConstant": FloatConstant,
@@ -1019,7 +1097,8 @@ NODE_CLASS_MAPPINGS = {
     "CrossFadeImages": CrossFadeImages,
     "EmptyLatentImagePresets": EmptyLatentImagePresets,
     "ColorMatch": ColorMatch,
-    "GetImageRangeFromBatch": GetImageRangeFromBatch
+    "GetImageRangeFromBatch": GetImageRangeFromBatch,
+    "SaveImageWithAlpha": SaveImageWithAlpha
 }
 NODE_DISPLAY_NAME_MAPPINGS = {
     "INTConstant": "INT Constant",
@@ -1040,5 +1119,6 @@ NODE_DISPLAY_NAME_MAPPINGS = {
     "SomethingToString": "SomethingToString",
     "EmptyLatentImagePresets": "EmptyLatentImagePresets",
     "ColorMatch": "ColorMatch",
-    "GetImageRangeFromBatch": "GetImageRangeFromBatch"
+    "GetImageRangeFromBatch": "GetImageRangeFromBatch",
+    "SaveImageWithAlpha": "SaveImageWithAlpha"
 }