| import torch |
| from huggingface_guess import model_list |
|
|
| from backend import memory_management |
| from backend.diffusion_engine.base import ForgeDiffusionEngine, ForgeObjects |
| from backend.modules.k_prediction import PredictionFlux |
| from backend.patcher.clip import CLIP |
| from backend.patcher.unet import UnetPatcher |
| from backend.patcher.vae import VAE |
| from backend.text_processing.t5_engine import T5TextProcessingEngine |
|
|
|
|
| class Chroma(ForgeDiffusionEngine): |
| matched_guesses = [model_list.Chroma] |
|
|
| def __init__(self, estimated_config, huggingface_components): |
| super().__init__(estimated_config, huggingface_components) |
| self.is_inpaint = False |
|
|
| clip = CLIP(model_dict={"t5xxl": huggingface_components["text_encoder"]}, tokenizer_dict={"t5xxl": huggingface_components["tokenizer"]}) |
|
|
| vae = VAE(model=huggingface_components["vae"]) |
| k_predictor = PredictionFlux(mu=1.0) |
| unet = UnetPatcher.from_model(model=huggingface_components["transformer"], diffusers_scheduler=None, k_predictor=k_predictor, config=estimated_config) |
|
|
| self.text_processing_engine_t5 = T5TextProcessingEngine( |
| text_encoder=clip.cond_stage_model.t5xxl, |
| tokenizer=clip.tokenizer.t5xxl, |
| min_length=-1, |
| min_padding=1, |
| ) |
|
|
| self.forge_objects = ForgeObjects(unet=unet, clip=clip, vae=vae, clipvision=None) |
| self.forge_objects_original = self.forge_objects.shallow_copy() |
| self.forge_objects_after_applying_lora = self.forge_objects.shallow_copy() |
|
|
| self.is_flux = True |
|
|
| @torch.inference_mode() |
| def get_learned_conditioning(self, prompt: list[str]): |
| memory_management.load_model_gpu(self.forge_objects.clip.patcher) |
| return self.text_processing_engine_t5(prompt) |
|
|
| @torch.inference_mode() |
| def get_prompt_lengths_on_ui(self, prompt): |
| token_count = len(self.text_processing_engine_t5.tokenize([prompt])[0]) |
| return token_count, max(255, token_count) |
|
|
| @torch.inference_mode() |
| def encode_first_stage(self, x): |
| sample = self.forge_objects.vae.encode(x.movedim(1, -1) * 0.5 + 0.5) |
| sample = self.forge_objects.vae.first_stage_model.process_in(sample) |
| return sample.to(x) |
|
|
| @torch.inference_mode() |
| def decode_first_stage(self, x): |
| sample = self.forge_objects.vae.first_stage_model.process_out(x) |
| sample = self.forge_objects.vae.decode(sample).movedim(-1, 1) * 2.0 - 1.0 |
| return sample.to(x) |
|
|
