support FLUX

diffsynth/prompters/__init__.py

@@ -4,3 +4,4 @@ from .sdxl_prompter import SDXLPrompter
 from .sd3_prompter import SD3Prompter
 from .hunyuan_dit_prompter import HunyuanDiTPrompter
 from .kolors_prompter import KolorsPrompter
+from .flux_prompter import FluxPrompter

diffsynth/prompters/flux_prompter.py

@@ -0,0 +1,74 @@
+from .base_prompter import BasePrompter
+from ..models.flux_text_encoder import FluxTextEncoder1, FluxTextEncoder2
+from transformers import CLIPTokenizer, T5TokenizerFast
+import os, torch
+
+
+class FluxPrompter(BasePrompter):
+    def __init__(
+        self,
+        tokenizer_1_path=None,
+        tokenizer_2_path=None
+    ):
+        if tokenizer_1_path is None:
+            base_path = os.path.dirname(os.path.dirname(__file__))
+            tokenizer_1_path = os.path.join(base_path, "tokenizer_configs/flux/tokenizer_1")
+        if tokenizer_2_path is None:
+            base_path = os.path.dirname(os.path.dirname(__file__))
+            tokenizer_2_path = os.path.join(base_path, "tokenizer_configs/flux/tokenizer_2")
+        super().__init__()
+        self.tokenizer_1 = CLIPTokenizer.from_pretrained(tokenizer_1_path)
+        self.tokenizer_2 = T5TokenizerFast.from_pretrained(tokenizer_2_path)
+        self.text_encoder_1: FluxTextEncoder1 = None
+        self.text_encoder_2: FluxTextEncoder2 = None
+
+
+    def fetch_models(self, text_encoder_1: FluxTextEncoder1 = None, text_encoder_2: FluxTextEncoder2 = None):
+        self.text_encoder_1 = text_encoder_1
+        self.text_encoder_2 = text_encoder_2
+
+
+    def encode_prompt_using_clip(self, prompt, text_encoder, tokenizer, max_length, device):
+        input_ids = tokenizer(
+            prompt,
+            return_tensors="pt",
+            padding="max_length",
+            max_length=max_length,
+            truncation=True
+        ).input_ids.to(device)
+        _, pooled_prompt_emb = text_encoder(input_ids)
+        return pooled_prompt_emb
+    
+
+    def encode_prompt_using_t5(self, prompt, text_encoder, tokenizer, max_length, device):
+        input_ids = tokenizer(
+            prompt,
+            return_tensors="pt",
+            padding="max_length",
+            max_length=max_length,
+            truncation=True,
+        ).input_ids.to(device)
+        prompt_emb = text_encoder(input_ids)
+        prompt_emb = prompt_emb.reshape((1, prompt_emb.shape[0]*prompt_emb.shape[1], -1))
+
+        return prompt_emb
+    
+
+    def encode_prompt(
+        self,
+        prompt,
+        positive=True,
+        device="cuda"
+    ):
+        prompt = self.process_prompt(prompt, positive=positive)
+        
+        # CLIP
+        pooled_prompt_emb = self.encode_prompt_using_clip(prompt, self.text_encoder_1, self.tokenizer_1, 77, device)
+        
+        # T5
+        prompt_emb = self.encode_prompt_using_t5(prompt, self.text_encoder_2, self.tokenizer_2, 256, device)
+
+        # text_ids
+        text_ids = torch.zeros(prompt_emb.shape[0], prompt_emb.shape[1], 3).to(device=device, dtype=prompt_emb.dtype)
+
+        return prompt_emb, pooled_prompt_emb, text_ids