From ce5d77082a226c1a6cdaef839f617e6e9cc667ea Mon Sep 17 00:00:00 2001
From: Yuan-Man <68322456+Yuan-ManX@users.noreply.github.com>
Date: Mon, 10 Mar 2025 14:37:36 +0800
Subject: [PATCH] Create utils.py

---
 StyleStudio/ip_adapter/utils.py | 142 ++++++++++++++++++++++++++++++++
 1 file changed, 142 insertions(+)
 create mode 100644 StyleStudio/ip_adapter/utils.py

diff --git a/StyleStudio/ip_adapter/utils.py b/StyleStudio/ip_adapter/utils.py
new file mode 100644
index 0000000..09ca0c8
--- /dev/null
+++ b/StyleStudio/ip_adapter/utils.py
@@ -0,0 +1,142 @@
+import torch
+import torch.nn.functional as F
+import numpy as np
+from PIL import Image
+
+BLOCKS = {
+    'content': ['down_blocks'],
+    'style': ["up_blocks"],
+
+}
+
+controlnet_BLOCKS = {
+    'content': [],
+    'style': ["down_blocks"],
+}
+
+
+def resize_width_height(width, height, min_short_side=512, max_long_side=1024):
+
+    if width < height:
+
+        if width < min_short_side:
+            scale_factor = min_short_side / width
+            new_width = min_short_side
+            new_height = int(height * scale_factor)
+        else:
+            new_width, new_height = width, height
+    else:
+
+        if height < min_short_side:
+            scale_factor = min_short_side / height
+            new_width = int(width * scale_factor)
+            new_height = min_short_side
+        else:
+            new_width, new_height = width, height
+
+    if max(new_width, new_height) > max_long_side:
+        scale_factor = max_long_side / max(new_width, new_height)
+        new_width = int(new_width * scale_factor)
+        new_height = int(new_height * scale_factor)
+    return new_width, new_height
+
+def resize_content(content_image):
+    max_long_side = 1024
+    min_short_side = 1024
+
+    new_width, new_height = resize_width_height(content_image.size[0], content_image.size[1],
+                                                min_short_side=min_short_side, max_long_side=max_long_side)
+    height = new_height // 16 * 16
+    width = new_width // 16 * 16
+    content_image = content_image.resize((width, height))
+
+    return width,height,content_image
+
+attn_maps = {}
+def hook_fn(name):
+    def forward_hook(module, input, output):
+        if hasattr(module.processor, "attn_map"):
+            attn_maps[name] = module.processor.attn_map
+            del module.processor.attn_map
+
+    return forward_hook
+
+def register_cross_attention_hook(unet):
+    for name, module in unet.named_modules():
+        if name.split('.')[-1].startswith('attn2'):
+            module.register_forward_hook(hook_fn(name))
+
+    return unet
+
+def upscale(attn_map, target_size):
+    attn_map = torch.mean(attn_map, dim=0)
+    attn_map = attn_map.permute(1,0)
+    temp_size = None
+
+    for i in range(0,5):
+        scale = 2 ** i
+        if ( target_size[0] // scale ) * ( target_size[1] // scale) == attn_map.shape[1]*64:
+            temp_size = (target_size[0]//(scale*8), target_size[1]//(scale*8))
+            break
+
+    assert temp_size is not None, "temp_size cannot is None"
+
+    attn_map = attn_map.view(attn_map.shape[0], *temp_size)
+
+    attn_map = F.interpolate(
+        attn_map.unsqueeze(0).to(dtype=torch.float32),
+        size=target_size,
+        mode='bilinear',
+        align_corners=False
+    )[0]
+
+    attn_map = torch.softmax(attn_map, dim=0)
+    return attn_map
+def get_net_attn_map(image_size, batch_size=2, instance_or_negative=False, detach=True):
+
+    idx = 0 if instance_or_negative else 1
+    net_attn_maps = []
+
+    for name, attn_map in attn_maps.items():
+        attn_map = attn_map.cpu() if detach else attn_map
+        attn_map = torch.chunk(attn_map, batch_size)[idx].squeeze()
+        attn_map = upscale(attn_map, image_size) 
+        net_attn_maps.append(attn_map) 
+
+    net_attn_maps = torch.mean(torch.stack(net_attn_maps,dim=0),dim=0)
+
+    return net_attn_maps
+
+def attnmaps2images(net_attn_maps):
+
+    #total_attn_scores = 0
+    images = []
+
+    for attn_map in net_attn_maps:
+        attn_map = attn_map.cpu().numpy()
+        #total_attn_scores += attn_map.mean().item()
+
+        normalized_attn_map = (attn_map - np.min(attn_map)) / (np.max(attn_map) - np.min(attn_map)) * 255
+        normalized_attn_map = normalized_attn_map.astype(np.uint8)
+        #print("norm: ", normalized_attn_map.shape)
+        image = Image.fromarray(normalized_attn_map)
+
+        #image = fix_save_attn_map(attn_map)
+        images.append(image)
+
+    #print(total_attn_scores)
+    return images
+def is_torch2_available():
+    return hasattr(F, "scaled_dot_product_attention")
+
+def get_generator(seed, device):
+
+    if seed is not None:
+        if isinstance(seed, list):
+            generator = [torch.Generator(device).manual_seed(seed_item) for seed_item in seed]
+        else:
+            generator = torch.Generator(device).manual_seed(seed)
+    else:
+        generator = None
+
+    return generator