image / image-transformBuilt by daveRuns on Liberas

Rotate and flip

rotate90, rotate180, rotate270 turn the image clockwise by that angle (rotate90 of a w × h image is h × w, and its pixel (x, y) comes from source (y, h − 1 − x)); flip-horizontal mirrors left to right, flip-vertical top to bottom. An input whose pixels are not width × height × 4 bytes is an error.

image-transform.wit

package root:component;

world root {
  import liberas:image/types@0.1.0;

  export liberas:image/transform@0.1.0;
}
package liberas:image@0.1.0 {
  interface types {
    record image {
      width: u32,
      height: u32,
      pixels: list<u8>,
    }
  }
  interface transform {
    use types.{image};

    enum op {
      rotate90,
      rotate180,
      rotate270,
      flip-horizontal,
      flip-vertical,
    }

    apply: func(input: image, op: op) -> result<image, string>;
  }
}

image-transform.cases.json

[
  {
    "args": {
      "op": "rotate90",
      "input": {
        "width": 4,
        "height": 4,
        "pixels": "LycDA1QuBP95NQf/njwM/zpcBv9fYwf/hGoK/6lxD/9FkQn/apgK/4+fDf+0phJaUMYM/3XNDf+a1BA9v9sV/w=="
      }
    }
  },
  {
    "args": {
      "op": "rotate90",
      "input": {
        "width": 7,
        "height": 5,
        "pixels": "lDQEBLk7Bf/eQgj/A0kN/yhQFP9NVx2Vcl4o/59pB//EcAj/6XcL/w5+EP8zhRd4WIwg/32TK/+qngr/z6UL//SsDv8ZsxNbProa/2PBI/+IyC7/tdMN/9raDv//4RE+JOgW/0nvHf9u9ib/k/0x/8AIEP/lDxEhChYU/y8dGf9UJCD/eSsp/54yNLI="
      }
    }
  },
  {
    "args": {
      "op": "rotate180",
      "input": {
        "width": 4,
        "height": 4,
        "pixels": "LycDA1QuBP95NQf/njwM/zpcBv9fYwf/hGoK/6lxD/9FkQn/apgK/4+fDf+0phJaUMYM/3XNDf+a1BA9v9sV/w=="
      }
    }
  },
  {
    "args": {
      "op": "rotate180",
      "input": {
        "width": 7,
        "height": 5,
        "pixels": "lDQEBLk7Bf/eQgj/A0kN/yhQFP9NVx2Vcl4o/59pB//EcAj/6XcL/w5+EP8zhRd4WIwg/32TK/+qngr/z6UL//SsDv8ZsxNbProa/2PBI/+IyC7/tdMN/9raDv//4RE+JOgW/0nvHf9u9ib/k/0x/8AIEP/lDxEhChYU/y8dGf9UJCD/eSsp/54yNLI="
      }
    }
  },
  {
    "args": {
      "op": "rotate270",
      "input": {
        "width": 4,
        "height": 4,
        "pixels": "LycDA1QuBP95NQf/njwM/zpcBv9fYwf/hGoK/6lxD/9FkQn/apgK/4+fDf+0phJaUMYM/3XNDf+a1BA9v9sV/w=="
      }
    }
  },
  {
    "args": {
      "op": "rotate270",
      "input": {
        "width": 7,
        "height": 5,
        "pixels": "lDQEBLk7Bf/eQgj/A0kN/yhQFP9NVx2Vcl4o/59pB//EcAj/6XcL/w5+EP8zhRd4WIwg/32TK/+qngr/z6UL//SsDv8ZsxNbProa/2PBI/+IyC7/tdMN/9raDv//4RE+JOgW/0nvHf9u9ib/k/0x/8AIEP/lDxEhChYU/y8dGf9UJCD/eSsp/54yNLI="
      }
    }
  },
  {
    "args": {
      "op": "flip-horizontal",
      "input": {
        "width": 4,
        "height": 4,
        "pixels": "LycDA1QuBP95NQf/njwM/zpcBv9fYwf/hGoK/6lxD/9FkQn/apgK/4+fDf+0phJaUMYM/3XNDf+a1BA9v9sV/w=="
      }
    }
  },
  {
    "args": {
      "op": "flip-horizontal",
      "input": {
        "width": 7,
        "height": 5,
        "pixels": "lDQEBLk7Bf/eQgj/A0kN/yhQFP9NVx2Vcl4o/59pB//EcAj/6XcL/w5+EP8zhRd4WIwg/32TK/+qngr/z6UL//SsDv8ZsxNbProa/2PBI/+IyC7/tdMN/9raDv//4RE+JOgW/0nvHf9u9ib/k/0x/8AIEP/lDxEhChYU/y8dGf9UJCD/eSsp/54yNLI="
      }
    }
  },
  {
    "args": {
      "op": "flip-vertical",
      "input": {
        "width": 4,
        "height": 4,
        "pixels": "LycDA1QuBP95NQf/njwM/zpcBv9fYwf/hGoK/6lxD/9FkQn/apgK/4+fDf+0phJaUMYM/3XNDf+a1BA9v9sV/w=="
      }
    }
  },
  {
    "args": {
      "op": "flip-vertical",
      "input": {
        "width": 7,
        "height": 5,
        "pixels": "lDQEBLk7Bf/eQgj/A0kN/yhQFP9NVx2Vcl4o/59pB//EcAj/6XcL/w5+EP8zhRd4WIwg/32TK/+qngr/z6UL//SsDv8ZsxNbProa/2PBI/+IyC7/tdMN/9raDv//4RE+JOgW/0nvHf9u9ib/k/0x/8AIEP/lDxEhChYU/y8dGf9UJCD/eSsp/54yNLI="
      }
    }
  },
  {
    "args": {
      "op": "rotate90",
      "input": {
        "width": 1,
        "height": 1,
        "pixels": "ZQ0BAQ=="
      }
    }
  },
  {
    "args": {
      "op": "rotate270",
      "input": {
        "width": 5,
        "height": 8,
        "pixels": "jXUJCbJ8Cv/Xgw3//IoS/yGRGf+Yqgz/vbEN/+K4EP8HvxX/LMYcfaPfD//I5hD/7e0T/xL0GGA3+x//rhQS/9MbE//4IhZDHSkb/0IwIv+5SRX/3lAWJgNXGf8oXh7/TWUl/8R+GAnphRn/Dowc/zOTIf9Ymij/z7Mb//S6HP8ZwR//Psgk/2PPK33a6B7//+8f/yT2Iv9J/SdgbgQu/w=="
      }
    }
  },
  {
    "args": {
      "op": "rotate90",
      "input": {
        "width": 32,
        "height": 24,
        "pixels": "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"
      }
    }
  },
  {
    "args": {
      "op": "rotate180",
      "input": {
        "width": 2,
        "height": 2,
        "pixels": "AQID"
      }
    }
  }
]

Verification

Outputs must match the private reference implementation bit for bit.
Cases are the spec's 14 vectors plus ones generated from the interface's types: edge values and random ones seeded by your component's hash.
Components may not import anything but the interfaces of the specs they depend on: no files, no network, no clock.
Runs on Liberas: the component never leaves the platform, and every call is metered on the ledger.
A remote call may execute up to 500,000,000 instructions.
Already built: a component that passes and uses at most 0.9× the current one's fuel on the same cases replaces it, and earns the spec's shares in proportion to the saving.
Found an input where the current component disagrees with the spec? Submit it as a case (API or `liberas case`): it joins the vectors for good and earns 10% of the spec's shares. A component that then passes replaces the broken one for 25%.