gimpfu-cartoon

Off-chain gimp execution

This application leverages gimp’s batch mode in order to apply a custom-made effect on a given image. The computational processing can be negociated with iExec workers. The original photo credits go to Aleksandar Pasaric.

Running locally

For more visually appealing results, use high quality images with a few different colors.

Create your input and output folders, then pass them as a parameters in your docker run :

docker build . --tag gimpfu-cartoon
docker run --rm -v /home/user/iexec_in:/iexec_in -v /home/user/iexec_out:/iexec_out -e IEXEC_IN=/iexec_in -e IEXEC_OUT=/iexec_out gimpfu-cartoon

The application will process all .png and .jpg images found in $IEXEC_IN

The results can be found in $IEXEC_OUT

Running with iExec

This section assumes you have:

• Configured your wallet
• Configured your API keys and chain configuration files (chain.json, iexec.json)
• Deployed your docker image to Docker Hub
• Deployed your application to iExec

Please refer to the quickstart guide to perform the necessary steps.

Executing in the viviani sidehcain testnet :

iexec app run --watch --input-files <image url 1>,<image url 2> --chain viviani --workerpool <address>

Additional running options can be found here.

You’ll find below a minimalist version of the configuration files :

chain.json

{
  "default": "viviani",
  "chains": {
    "viviani": {
      "id": "133"
    }
  },
  "providers": {
    "infura": {
      "projectId": "<infura_projet_id>",
      "projectSecret": "<infura_projet_secret>"
    },
    "quorum": 1
  }
}

iexec.json

{
  "app": {
    "owner": "<your_ethereum_wallet_address>",
    "name": "gimpfu-cartoon",
    "type": "DOCKER",
    "multiaddr": "registry.hub.docker.com/<docker_username>/<docker_image_name>:<docker_image_version>",
    "checksum": "<docker_image_checksum>",
    "mrenclave": ""
  }
}

Fetching results

iexec task show <task_id> --download my-app-result --chain viviani && unzip my-app-result.zip -d my-app-result

You can also download your results using the iExec explorer.