Include CLIPTextModel parameters in conversion (huggingface#695)

Author: kanewallmann

scripts/convert_original_stable_diffusion_to_diffusers.py

@@ -595,6 +595,22 @@ def _copy_layers(hf_layers, pt_layers):
     return hf_model
 
 
+def convert_ldm_clip_checkpoint(checkpoint):
+    text_model = CLIPTextModel.from_pretrained("openai/clip-vit-large-patch14")
+
+    keys = list(checkpoint.keys())
+
+    text_model_dict = {}
+
+    for key in keys:
+        if key.startswith("cond_stage_model.transformer"):
+            text_model_dict[key[len("cond_stage_model.transformer.") :]] = checkpoint[key]
+
+    text_model.load_state_dict(text_model_dict)
+
+    return text_model
+
+
 if __name__ == "__main__":
     parser = argparse.ArgumentParser()
 
@@ -668,7 +684,7 @@ def _copy_layers(hf_layers, pt_layers):
     # Convert the text model.
     text_model_type = original_config.model.params.cond_stage_config.target.split(".")[-1]
     if text_model_type == "FrozenCLIPEmbedder":
-        text_model = CLIPTextModel.from_pretrained("openai/clip-vit-large-patch14")
+        text_model = convert_ldm_clip_checkpoint(checkpoint)
         tokenizer = CLIPTokenizer.from_pretrained("openai/clip-vit-large-patch14")
         safety_checker = StableDiffusionSafetyChecker.from_pretrained("CompVis/stable-diffusion-safety-checker")
         feature_extractor = AutoFeatureExtractor.from_pretrained("CompVis/stable-diffusion-safety-checker")