Use own clip vision model implementation.

comfy/clip_model.py

@@ -57,12 +57,7 @@ class CLIPEncoder(torch.nn.Module):
         self.layers = torch.nn.ModuleList([CLIPLayer(embed_dim, heads, intermediate_size, intermediate_activation, dtype, device, operations) for i in range(num_layers)])
 
     def forward(self, x, mask=None, intermediate_output=None):
-        optimized_attention = optimized_attention_for_device(x.device, mask=True)
-        causal_mask = torch.empty(x.shape[1], x.shape[1], dtype=x.dtype, device=x.device).fill_(float("-inf")).triu_(1)
-        if mask is not None:
-            mask += causal_mask
-        else:
-            mask = causal_mask
+        optimized_attention = optimized_attention_for_device(x.device, mask=mask is not None)
 
         if intermediate_output is not None:
             if intermediate_output < 0:
@@ -105,6 +100,12 @@ class CLIPTextModel_(torch.nn.Module):
             mask = 1.0 - attention_mask.to(x.dtype).unsqueeze(1).unsqueeze(1).expand(attention_mask.shape[0], 1, attention_mask.shape[-1], attention_mask.shape[-1])
             mask = mask.masked_fill(mask.to(torch.bool), float("-inf"))
 
+        causal_mask = torch.empty(x.shape[1], x.shape[1], dtype=x.dtype, device=x.device).fill_(float("-inf")).triu_(1)
+        if mask is not None:
+            mask += causal_mask
+        else:
+            mask = causal_mask
+
         x, i = self.encoder(x, mask=mask, intermediate_output=intermediate_output)
         x = self.final_layer_norm(x)
         if i is not None and final_layer_norm_intermediate:
@@ -128,3 +129,60 @@ class CLIPTextModel(torch.nn.Module):
 
     def forward(self, *args, **kwargs):
         return self.text_model(*args, **kwargs)
+
+class CLIPVisionEmbeddings(torch.nn.Module):
+    def __init__(self, embed_dim, num_channels=3, patch_size=14, image_size=224, dtype=None, device=None, operations=None):
+        super().__init__()
+        self.class_embedding = torch.nn.Parameter(torch.empty(embed_dim, dtype=dtype, device=device))
+
+        self.patch_embedding = operations.Conv2d(
+            in_channels=num_channels,
+            out_channels=embed_dim,
+            kernel_size=patch_size,
+            stride=patch_size,
+            bias=False,
+            dtype=dtype,
+            device=device
+        )
+
+        num_patches = (image_size // patch_size) ** 2
+        num_positions = num_patches + 1
+        self.position_embedding = torch.nn.Embedding(num_positions, embed_dim, dtype=dtype, device=device)
+
+    def forward(self, pixel_values):
+        embeds = self.patch_embedding(pixel_values).flatten(2).transpose(1, 2)
+        return torch.cat([self.class_embedding.expand(pixel_values.shape[0], 1, -1), embeds], dim=1) + self.position_embedding.weight
+
+
+class CLIPVision(torch.nn.Module):
+    def __init__(self, config_dict, dtype, device, operations):
+        super().__init__()
+        num_layers = config_dict["num_hidden_layers"]
+        embed_dim = config_dict["hidden_size"]
+        heads = config_dict["num_attention_heads"]
+        intermediate_size = config_dict["intermediate_size"]
+        intermediate_activation = config_dict["hidden_act"]
+
+        self.embeddings = CLIPVisionEmbeddings(embed_dim, config_dict["num_channels"], config_dict["patch_size"], config_dict["image_size"], dtype=torch.float32, device=device, operations=operations)
+        self.pre_layrnorm = operations.LayerNorm(embed_dim)
+        self.encoder = CLIPEncoder(num_layers, embed_dim, heads, intermediate_size, intermediate_activation, dtype, device, operations)
+        self.post_layernorm = operations.LayerNorm(embed_dim)
+
+    def forward(self, pixel_values, attention_mask=None, intermediate_output=None):
+        x = self.embeddings(pixel_values)
+        x = self.pre_layrnorm(x)
+        #TODO: attention_mask?
+        x, i = self.encoder(x, mask=None, intermediate_output=intermediate_output)
+        pooled_output = self.post_layernorm(x[:, 0, :])
+        return x, i, pooled_output
+
+class CLIPVisionModelProjection(torch.nn.Module):
+    def __init__(self, config_dict, dtype, device, operations):
+        super().__init__()
+        self.vision_model = CLIPVision(config_dict, dtype, device, operations)
+        self.visual_projection = operations.Linear(config_dict["hidden_size"], config_dict["projection_dim"], bias=False)
+
+    def forward(self, *args, **kwargs):
+        x = self.vision_model(*args, **kwargs)
+        out = self.visual_projection(x[2])
+        return (x[0], x[1], out)

comfy/clip_vision.py

@@ -1,13 +1,20 @@
-from transformers import CLIPVisionModelWithProjection, CLIPVisionConfig, modeling_utils
 from .utils import load_torch_file, transformers_convert, common_upscale
 import os
 import torch
 import contextlib
+import json
 
 import comfy.ops
 import comfy.model_patcher
 import comfy.model_management
 import comfy.utils
+import comfy.clip_model
+
+class Output:
+    def __getitem__(self, key):
+        return getattr(self, key)
+    def __setitem__(self, key, item):
+        setattr(self, key, item)
 
 def clip_preprocess(image, size=224):
     mean = torch.tensor([ 0.48145466,0.4578275,0.40821073], device=image.device, dtype=image.dtype)
@@ -22,17 +29,16 @@ def clip_preprocess(image, size=224):
 
 class ClipVisionModel():
     def __init__(self, json_config):
-        config = CLIPVisionConfig.from_json_file(json_config)
+        with open(json_config) as f:
+            config = json.load(f)
+
         self.load_device = comfy.model_management.text_encoder_device()
         offload_device = comfy.model_management.text_encoder_offload_device()
         self.dtype = torch.float32
         if comfy.model_management.should_use_fp16(self.load_device, prioritize_performance=False):
             self.dtype = torch.float16
 
-        with comfy.ops.use_comfy_ops(offload_device, self.dtype):
-            with modeling_utils.no_init_weights():
-                self.model = CLIPVisionModelWithProjection(config)
-        self.model.to(self.dtype)
+        self.model = comfy.clip_model.CLIPVisionModelProjection(config, self.dtype, offload_device, comfy.ops)
 
         self.patcher = comfy.model_patcher.ModelPatcher(self.model, load_device=self.load_device, offload_device=offload_device)
     def load_sd(self, sd):
@@ -48,17 +54,12 @@ class ClipVisionModel():
             precision_scope = lambda a, b: contextlib.nullcontext(a)
 
         with precision_scope(comfy.model_management.get_autocast_device(self.load_device), torch.float32):
-            outputs = self.model(pixel_values=pixel_values, output_hidden_states=True)
-
-        for k in outputs:
-            t = outputs[k]
-            if t is not None:
-                if k == 'hidden_states':
-                    outputs["penultimate_hidden_states"] = t[-2].to(comfy.model_management.intermediate_device())
-                    outputs["hidden_states"] = None
-                else:
-                    outputs[k] = t.to(comfy.model_management.intermediate_device())
+            out = self.model(pixel_values=pixel_values, intermediate_output=-2)
 
+        outputs = Output()
+        outputs["last_hidden_state"] = out[0].to(comfy.model_management.intermediate_device())
+        outputs["image_embeds"] = out[2].to(comfy.model_management.intermediate_device())
+        outputs["penultimate_hidden_states"] = out[1].to(comfy.model_management.intermediate_device())
         return outputs
 
 def convert_to_transformers(sd, prefix):