DaSiWa Resolution Scaler

A mathematically precise resolution scaling node for ComfyUI.

🚀 Why?

Standard scalers often change the total pixel count when you change aspect ratios, leading to unexpected VRAM spikes or OOM (Out of Memory) errors. This scaler uses a constant-area formula:

Width = \sqrt{TargetPixels \times AspectRatio} Height = \sqrt{TargetPixels / AspectRatio}

This ensures that whether you are generating 1:1, 9:16, or 21:9, the total stress on your GPU remains identical.

✨ Features

Pixel Precision Tiers: Choose from optimized Megapixel levels.
Resolution Presets: Standard targets like 720p, 1080p, and 4K areas.
Smart Aspect Engine:
- Scale From Image: Automatically detects the shape of your input image.
- Manual Aspect: Define custom ratios (e.g., 9:21) without changing the "detail" level.
WAN/LTX Optimization: Optional Div32 mode that snaps all dimensions to 32-pixel boundaries (mandatory for WAN/LTX VAEs to prevent artifacts).
Standard Mode: Clean rounding for use with SD1.5, SDXL, or Flux.
Error Protection: Built-in validation to prevent crashes if inputs are missing.

🛠 Installation

Manual install

Activate your venv inside your comfyui folder

Clone this repo into your custom_nodes folder:

git clone https://github.com/darksidewalker/ComfyUI-DaSiWa-Nodes

Install all dependencies
e.g.
```
uv pip install -r requirements.txt
```

Use ComfyUI-Manager

Search for DaSiWa-Nodes and install