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Perpneg guider with updated pre and post-cfg (#8698)

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chaObserv 2025-06-29 06:13:13 +08:00 committed by GitHub
parent 396454fa41
commit 5b4eb021cb
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1 changed files with 12 additions and 2 deletions
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14
comfy_extras/nodes_perpneg.py
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@ -69,8 +69,17 @@ class Guider_PerpNeg(comfy.samplers.CFGGuider):
negative_cond = self.conds.get("negative", None)
empty_cond = self.conds.get("empty_negative_prompt", None)
(noise_pred_pos, noise_pred_neg, noise_pred_empty) = \
comfy.samplers.calc_cond_batch(self.inner_model, [positive_cond, negative_cond, empty_cond], x, timestep, model_options)
conds = [positive_cond, negative_cond, empty_cond]
out = comfy.samplers.calc_cond_batch(self.inner_model, conds, x, timestep, model_options)
# Apply pre_cfg_functions since sampling_function() is skipped
for fn in model_options.get("sampler_pre_cfg_function", []):
args = {"conds":conds, "conds_out": out, "cond_scale": self.cfg, "timestep": timestep,
"input": x, "sigma": timestep, "model": self.inner_model, "model_options": model_options}
out = fn(args)
noise_pred_pos, noise_pred_neg, noise_pred_empty = out
cfg_result = perp_neg(x, noise_pred_pos, noise_pred_neg, noise_pred_empty, self.neg_scale, self.cfg)
# normally this would be done in cfg_function, but we skipped
@ -82,6 +91,7 @@ class Guider_PerpNeg(comfy.samplers.CFGGuider):
"denoised": cfg_result,
"cond": positive_cond,
"uncond": negative_cond,
"cond_scale": self.cfg,
"model": self.inner_model,
"uncond_denoised": noise_pred_neg,
"cond_denoised": noise_pred_pos,