zz_clip_mod.py

import os
import torch

import gradio as gr

from modules import script_callbacks, scripts, shared


class CLIPBlend:
    def __init__(self):
        self.process_tokens = None

    def __call__(self, remade_batch_tokens, multipliers):
        if shared.opts.clip_blend_enabled:
            ratio1 = shared.opts.clip_blend_ratio1
            ratio2 = shared.opts.clip_blend_ratio2

            CLIP_original = shared.opts.CLIP_stop_at_last_layers

            shared.opts.CLIP_stop_at_last_layers = 1
            z1 = self.process_tokens(remade_batch_tokens, multipliers) # type: ignore
            shared.opts.CLIP_stop_at_last_layers = 2
            z2 = self.process_tokens(remade_batch_tokens, multipliers) # type: ignore

            shared.opts.CLIP_stop_at_last_layers = CLIP_original

            blend1 = z1*(1.-ratio1)+z2*ratio1

            if shared.opts.clip_blend_concat:
                blend2 = z1*(1.-ratio2)+z2*ratio2
                return torch.hstack([blend1,blend2])
            return blend1

        z = self.process_tokens(remade_batch_tokens, multipliers) # type: ignore
        return z

clip_blend = CLIPBlend()

def on_model_loaded(sd_model):
    try:
        clip_blend.process_tokens = sd_model.cond_stage_model.process_tokens
        sd_model.cond_stage_model.process_tokens = clip_blend
    except AttributeError:
        pass

def on_script_unloaded():
    cond_stage_model = shared.sd_model.cond_stage_model # type: ignore
    try:
        if type(cond_stage_model.process_tokens) == CLIPBlend:
            cond_stage_model.process_tokens = cond_stage_model.process_tokens.process_tokens
    except AttributeError:
        pass

def on_ui_settings():
    section = ('clip_blend', 'CLIP Blend')
    shared.opts.add_option('clip_blend_enabled', shared.OptionInfo(
        False, 'Enable CLIP Blend', section=section
    ))
    shared.opts.add_option("clip_blend_ratio1", shared.OptionInfo(
        0, "Blend Ratio (R1) - The result is calculated as Z1 * (1 - R1) + Z2 * R1. Set to 0 to get CLIP skip=1; set to 1 to get CLIP skip=2",
        gr.Slider, {"minimum": -1, "maximum": 2, "step": 0.1}, section=section
    ))
    shared.opts.add_option("clip_blend_concat", shared.OptionInfo(
        False, "Concatenate second CLIP Blend", section=section
    ))
    shared.opts.add_option("clip_blend_ratio2", shared.OptionInfo(
        1, "Blend Ratio (R2) - The result is calculated as Z1 * (1 - R2) + Z2 * R2. Set to 0 to get CLIP skip=1; set to 1 to get CLIP skip=2",
        gr.Slider, {"minimum": -1, "maximum": 2, "step": 0.1}, section=section
    ))

def format_bool(x):
    return not x.lower().strip() in ['0', 'false']

def apply_override(p, opt, x, is_bool=False):
    getattr(p, 'override_settings')[opt] = format_bool(x) if is_bool else x

def apply_label(label, x, is_bool=False):
    return f"{label + (': ' if label else '')}{str(format_bool(x)) if is_bool else x}"

for scriptDataTuple in scripts.scripts_data:
    if os.path.basename(scriptDataTuple.path) == "xyz_grid.py":
        xy_grid = scriptDataTuple.module
        blend_enabled = xy_grid.AxisOption(
            "[CLIP Blend] Blend Enabled",
            str,
            lambda p, field, _: apply_override(p, 'clip_blend_enabled', field, is_bool=True),
            format_value=lambda p, opt, x: apply_label('CLIP Blend Enabled', x, is_bool=True)
        )

        ratio1 = xy_grid.AxisOption(
            "[CLIP Blend] Blend Ratio (R1)",
            float,
            lambda p, field, _: apply_override(p, 'clip_blend_ratio1', field, is_bool=False)
        )

        concat_enabled = xy_grid.AxisOption(
            "[CLIP Blend] Concatenate Second Blend",
            str,
            lambda p, field, _: apply_override(p, 'clip_blend_concat', field, is_bool=True),
            format_value=lambda p, opt, x: apply_label('Concatenated Second CLIP Blend', x, is_bool=True)
        )

        ratio2 = xy_grid.AxisOption(
            "[CLIP Blend] Blend Ratio (R2)",
            float,
            lambda p, field, _: apply_override(p, 'clip_blend_ratio2', field, is_bool=False)
        )

        xy_grid.axis_options.extend([
            blend_enabled,
            ratio1,
            concat_enabled,
            ratio2
        ])

script_callbacks.on_script_unloaded(on_script_unloaded)
script_callbacks.on_model_loaded(on_model_loaded)
script_callbacks.on_ui_settings(on_ui_settings)

Based on https://pastebin.com/tr0BJe6E, https://pastebin.com/Y1L66Gmu

Most code is not mine and is provided by an anon from 4chan.

For a similar script/extension, but for interpolating with lerp/slerp between CLIP layers, see https://github.com/hnmr293/stable-diffusion-webui-tripclipskip

Note: As of version 1.6.0, the webui now caches the prompt conds when it can by default. This means that attempting to use this extension with the XYZ script or quickly toggling this script for the same prompt will yield the previous result. This can be disabled in settings under Optimizations -> Persistent cond cache