An implementation of a server for the Stability AI API

Installation

Option 1 (recommended):

Install Miniconda, then in a Conda console:

git clone https://github.com/hafriedlander/stable-diffusion-grpcserver.git
cd stable-diffusion-grpcserver
conda env create -f environment.yaml
conda activate sd-grpc-server
sets HF_API_TOKEN={your huggingface token}
python ./server.py

Option 2:

PIP_EXTRA_INDEX_URL=https://download.pytorch.org/whl/cu116 pip install stable-diffusion-grpcserver
set HF_API_TOKEN={your huggingface token} 
sdgrpcserver

Features

• Txt2Img and Img2Img from Stability-AI/Stability-SDK, specifying a prompt
• Can load multiple pipelines, such as Stable and Waifu Diffusion, and swap between them as needed
• Mid and Low VRAM modes for larger generated images at the expense of some performance
• Adjustable NSFW behaviour
• Significantly enhanced masked painting:
  • When Strength < 1, uses normal diffusers inpainting (with improved mask gradient handling)
  • When Strength >= 1 and <= 2, uses seamless outpainting algorithm. Strength above 1 acts as a boost - the higher the value, the more even areas protected by a mask are allowed to change
• Euler, Euler_A samplers are currently integrated, and DDIM accepts an ETA parameter
• Cancel over API (using GRPC cancel will abort the currently in progress generation)
• Negative prompting (send a Prompt object with text and a negative weight)

Thanks to / Credits:

• Seamless outpainting https://github.com/parlance-zz/g-diffuser-bot/tree/g-diffuser-bot-beta2

Roadmap

Core API functions not working yet:

• Some samplers (like dpm2) are not currently supported in Diffusers
• ChainGenerate not implemented

Extra features to add

• Progress reporting over the API is included but not exposed yet
• Embedding params in png
• Extra APIs
  • Image resizing
  • Aspect ratio shifting
  • Asset management
  • Extension negotiation so we can:
    • Ping back progress notices
    • Allow cancellation requests
    • Specify negative prompts
• CLIP guided generation https://github.com/huggingface/diffusers/pull/561
• Community features:
  • Prompt calculation https://github.com/pharmapsychotic/clip-interrogator/blob/main/clip_interrogator.ipynb
  • Prompt suggestion https://huggingface.co/spaces/Gustavosta/MagicPrompt-Stable-Diffusion
  • Prompt compositing https://github.com/energy-based-model/Compositional-Visual-Generation-with-Composable-Diffusion-Models-PyTorch
  • Automasking https://github.com/ThstereforeGames/txt2mask
  • Other schedulers (needs custom pipeline for some). https://github.com/huggingface/diffusers/commit/489894e4d9272dec88fa3a64a8161aeab471fc18
  • Huge seeds
• Other thoughts
  • Figure out how to just suppress NSFW filtering altogether (takes VRAM, if you're not interested)