301 lines
9.3 KiB
Python
301 lines
9.3 KiB
Python
import os
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import io
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from inspect import cleandoc
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import logging
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from comfy.utils import common_upscale
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from comfy.comfy_types.node_typing import IO, ComfyNodeABC, InputTypeDict
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from .apis import (
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OpenAIImageGenerationRequest,
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OpenAIImageEditRequest,
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OpenAIImageGenerationResponse,
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)
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from .apis.client import ApiEndpoint, HttpMethod, SynchronousOperation
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import numpy as np
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from PIL import Image
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import requests
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import torch
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import math
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import base64
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import time
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import json
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def downscale_input(image):
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samples = image.movedim(-1, 1)
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# downscaling input images to roughly the same size as the outputs
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total = int(1536 * 1024)
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scale_by = math.sqrt(total / (samples.shape[3] * samples.shape[2]))
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if scale_by >= 1:
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return image
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width = round(samples.shape[3] * scale_by)
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height = round(samples.shape[2] * scale_by)
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s = common_upscale(samples, width, height, "lanczos", "disabled")
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s = s.movedim(1, -1)
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return s
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def validate_and_cast_response(response):
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# validate raw JSON response
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data = response.data
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if not data or len(data) == 0:
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raise Exception("No images returned from API endpoint")
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# Get base64 image data
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image_url = data[0].url
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b64_data = data[0].b64_json
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if not image_url and not b64_data:
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raise Exception("No image was generated in the response")
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if b64_data:
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img_data = base64.b64decode(b64_data)
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img = Image.open(io.BytesIO(img_data))
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elif image_url:
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img_response = requests.get(image_url)
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if img_response.status_code != 200:
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raise Exception("Failed to download the image")
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img = Image.open(io.BytesIO(img_response.content))
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img = img.convert("RGBA")
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# Convert to numpy array, normalize to float32 between 0 and 1
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img_array = np.array(img).astype(np.float32) / 255.0
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# Convert to torch tensor and add batch dimension
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return torch.from_numpy(img_array)[None,]
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class GPTImage1Generate(ComfyNodeABC):
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"""
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Generates images synchronously via OpenAI's GPT Image 1 endpoint.
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Uses the proxy at /proxy/openai/images/generations. Returned URLs are short‑lived,
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so download or cache results if you need to keep them.
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"""
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def __init__(self):
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pass
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@classmethod
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def INPUT_TYPES(self) -> InputTypeDict:
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return {
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"required": {
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"prompt": (
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IO.STRING,
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{
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"multiline": True,
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"default": "",
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"tooltip": "Text prompt for GPT Image 1",
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},
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),
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},
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"optional": {
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"api_base": (
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IO.STRING,
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{
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"default": "",
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"display": "string",
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"tooltip": "API Base URL",
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},
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),
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"auth_token": (
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IO.STRING,
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{
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"default": "",
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"display": "string",
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"tooltip": "API Auth Token",
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},
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),
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"model": (
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IO.STRING,
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{
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"default": "gpt-image-1",
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"display": "string",
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"tooltip": "GPT Image Model",
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},
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),
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"seed": (
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IO.INT,
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{
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"default": 0,
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"min": 0,
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"max": 2**31 - 1,
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"step": 1,
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"display": "number",
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"tooltip": "not implemented yet in backend",
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},
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),
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"quality": (
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IO.COMBO,
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{
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"options": ["low", "medium", "high"],
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"default": "low",
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"tooltip": "Image quality, affects cost and generation time.",
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},
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),
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"background": (
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IO.COMBO,
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{
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"options": ["opaque", "transparent"],
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"default": "opaque",
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"tooltip": "Return image with or without background",
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},
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),
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"size": (
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IO.COMBO,
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{
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"options": ["auto", "1024x1024", "1024x1536", "1536x1024"],
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"default": "auto",
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"tooltip": "Image size",
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},
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),
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"n": (
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IO.INT,
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{
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"default": 1,
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"min": 1,
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"max": 8,
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"step": 1,
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"display": "number",
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"tooltip": "How many images to generate",
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},
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),
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"image": (
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IO.IMAGE,
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{
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"default": None,
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"tooltip": "Optional reference image for image editing.",
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},
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),
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"mask": (
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IO.MASK,
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{
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"default": None,
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"tooltip": "Optional mask for inpainting (white areas will be replaced)",
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},
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),
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},
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# "hidden": {
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# "auth_token": "AUTH_TOKEN_COMFY_ORG"
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# }
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}
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RETURN_TYPES = (IO.IMAGE,)
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FUNCTION = "api_call"
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CATEGORY = "GPT Image 1 Generate Node"
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DESCRIPTION = cleandoc(__doc__ or "")
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# API_NODE = True
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@classmethod
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def api_call(
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self,
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prompt,
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api_base=None,
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auth_token=None,
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model=None,
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seed=0,
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quality="low",
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background="opaque",
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image=None,
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mask=None,
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n=1,
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size="1024x1024",
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):
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# 如果model为空，则使用默认的模型
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if model is None:
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model = "gpt-image-1"
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path = "images/generations"
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request_class = OpenAIImageGenerationRequest
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img_binaries = []
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mask_binary = None
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files = []
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if image is not None:
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path = "images/edits"
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request_class = OpenAIImageEditRequest
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batch_size = image.shape[0]
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for i in range(batch_size):
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single_image = image[i : i + 1]
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scaled_image = downscale_input(single_image).squeeze()
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image_np = (scaled_image.numpy() * 255).astype(np.uint8)
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img = Image.fromarray(image_np)
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img_byte_arr = io.BytesIO()
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img.save(img_byte_arr, format="PNG")
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img_byte_arr.seek(0)
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img_binary = img_byte_arr
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img_binary.name = f"image_{i}.png"
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img_binaries.append(img_binary)
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if batch_size == 1:
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files.append(("image", img_binary))
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else:
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files.append(("image[]", img_binary))
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if mask is not None:
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if image.shape[0] != 1:
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raise Exception("Cannot use a mask with multiple image")
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if image is None:
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raise Exception("Cannot use a mask without an input image")
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if mask.shape[1:] != image.shape[1:-1]:
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raise Exception("Mask and Image must be the same size")
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batch, height, width = mask.shape
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rgba_mask = torch.zeros(height, width, 4, device="cpu")
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rgba_mask[:, :, 3] = 1 - mask.squeeze().cpu()
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scaled_mask = downscale_input(rgba_mask.unsqueeze(0)).squeeze()
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mask_np = (scaled_mask.numpy() * 255).astype(np.uint8)
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mask_img = Image.fromarray(mask_np)
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mask_img_byte_arr = io.BytesIO()
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mask_img.save(mask_img_byte_arr, format="PNG")
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mask_img_byte_arr.seek(0)
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mask_binary = mask_img_byte_arr
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mask_binary.name = "mask.png"
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files.append(("mask", mask_binary))
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# Build the operation
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operation = SynchronousOperation(
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endpoint=ApiEndpoint(
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path=path,
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method=HttpMethod.POST,
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request_model=request_class,
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response_model=OpenAIImageGenerationResponse,
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),
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request=request_class(
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model=model,
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prompt=prompt,
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quality=quality,
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background=background,
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n=n,
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seed=seed,
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size=size,
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),
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files=files if files else None,
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api_base=api_base,
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auth_token=auth_token,
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)
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response = operation.execute()
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img_tensor = validate_and_cast_response(response)
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return (img_tensor,)
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# A dictionary that contains all nodes you want to export with their names
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# NOTE: names should be globally unique
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NODE_CLASS_MAPPINGS = {
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"GPTImage1Generate": GPTImage1Generate,
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}
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# A dictionary that contains the friendly/humanly readable titles for the nodes
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NODE_DISPLAY_NAME_MAPPINGS = {
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"GPTImage1Generate": "OpenAI GPT Image 1",
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}
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