Add working Qwen 2512 ControlNet (Fun ControlNet) support

[krigeta]

Summary

This PR adds full support for Qwen 2.5 Fun ControlNet format, enabling ControlNet functionality for Qwen image generation models.

Related Issues

• Closes Please add support Qwen-Image-2512-Fun-ControlNet-Union #12100
• Closes Please support Qwen-Image-2512-Fun-ControlNet-Union and Z-Image-Turbo-Fun-Controlnet-Union-2.1...2601 #11821
• Closes qwen image 2512 fun controlnet support #11910

Changes Made

Files Modified:

• comfy/controlnet.py - Added loader and integration support for Fun ControlNet format
• comfy/ldm/qwen_image/controlnet.py - New file implementing the Qwen Fun ControlNet architecture

Key Features:

• Core loader support for Qwen Fun ControlNet format
• Proper hint injection with optimized strength scaling
• Fallback packing/mask behavior aligned with VideoX implementation
• Strength=1 behavior matching with softened high-strength response

Commits:

1. Add core loader/support for Qwen Fun ControlNet format
2. Tone down Qwen Fun ControlNet hint injection strength
3. Align Fun ControlNet fallback packing/mask behavior with VideoX
4. Fix Fun ControlNet concat-mask mismatch and restore effective hint scale
5. Match Fun strength=1 behavior and soften high-strength response

Testing

Tested with Qwen 2512 Image model with Fun ControlNet, verified proper hint generation and injection.

[krigeta]

Hey @comfyanonymous I fixed everything now please check it when you got time.

[Ken-g6]

If this is just Qwen it does not close #11821

[juangea]

Waiting for this to go into release!
we need controlnet for Qwen Image 2512!

[zdjun1984]

Perhaps you can pubulish it as a custom node,like the Flux.2 Fun Controlnet nodes

[bubbliiiing]

0 0.
This looks very impressive.

[jeremytenjo]

We need this merged please 🫶

[RamonGuthrie]

This doesn't seem to be working

[juangea]

I have not tested it myself yet, but I have a colleague that tested it and said it was working fine.

Hiwnare you applying it?