comfy_extras/nodes_flux.py

import node_helpers
import comfy.utils

class CLIPTextEncodeFlux:
    @classmethod
    def INPUT_TYPES(s):
        return {"required": {
            "clip": ("CLIP", ),
            "clip_l": ("STRING", {"multiline": True, "dynamicPrompts": True}),
            "t5xxl": ("STRING", {"multiline": True, "dynamicPrompts": True}),
            "guidance": ("FLOAT", {"default": 3.5, "min": 0.0, "max": 100.0, "step": 0.1}),
            }}
    RETURN_TYPES = ("CONDITIONING",)
    FUNCTION = "encode"

    CATEGORY = "advanced/conditioning/flux"

    def encode(self, clip, clip_l, t5xxl, guidance):
        tokens = clip.tokenize(clip_l)
        tokens["t5xxl"] = clip.tokenize(t5xxl)["t5xxl"]

        return (clip.encode_from_tokens_scheduled(tokens, add_dict={"guidance": guidance}), )

class FluxGuidance:
    @classmethod
    def INPUT_TYPES(s):
        return {"required": {
            "conditioning": ("CONDITIONING", ),
            "guidance": ("FLOAT", {"default": 3.5, "min": 0.0, "max": 100.0, "step": 0.1}),
            }}

    RETURN_TYPES = ("CONDITIONING",)
    FUNCTION = "append"

    CATEGORY = "advanced/conditioning/flux"

    def append(self, conditioning, guidance):
        c = node_helpers.conditioning_set_values(conditioning, {"guidance": guidance})
        return (c, )


class FluxDisableGuidance:
    @classmethod
    def INPUT_TYPES(s):
        return {"required": {
            "conditioning": ("CONDITIONING", ),
            }}

    RETURN_TYPES = ("CONDITIONING",)
    FUNCTION = "append"

    CATEGORY = "advanced/conditioning/flux"
    DESCRIPTION = "This node completely disables the guidance embed on Flux and Flux like models"

    def append(self, conditioning):
        c = node_helpers.conditioning_set_values(conditioning, {"guidance": None})
        return (c, )


PREFERED_KONTEXT_RESOLUTIONS = [
    (672, 1568),
    (688, 1504),
    (720, 1456),
    (752, 1392),
    (800, 1328),
    (832, 1248),
    (880, 1184),
    (944, 1104),
    (1024, 1024),
    (1104, 944),
    (1184, 880),
    (1248, 832),
    (1328, 800),
    (1392, 752),
    (1456, 720),
    (1504, 688),
    (1568, 672),
]


class FluxKontextImageScale:
    @classmethod
    def INPUT_TYPES(s):
        return {"required": {"image": ("IMAGE", ),
                            },
               }

    RETURN_TYPES = ("IMAGE",)
    FUNCTION = "scale"

    CATEGORY = "advanced/conditioning/flux"
    DESCRIPTION = "This node resizes the image to one that is more optimal for flux kontext."

    def scale(self, image):
        width = image.shape[2]
        height = image.shape[1]
        aspect_ratio = width / height
        _, width, height = min((abs(aspect_ratio - w / h), w, h) for w, h in PREFERED_KONTEXT_RESOLUTIONS)
        image = comfy.utils.common_upscale(image.movedim(-1, 1), width, height, "lanczos", "center").movedim(1, -1)
        return (image, )


NODE_CLASS_MAPPINGS = {
    "CLIPTextEncodeFlux": CLIPTextEncodeFlux,
    "FluxGuidance": FluxGuidance,
    "FluxDisableGuidance": FluxDisableGuidance,
    "FluxKontextImageScale": FluxKontextImageScale,
}