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Initial release
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‎.formatter.exs‎

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# Used by "mix format"
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[
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inputs: ["{mix,.formatter}.exs", "{config,lib,test}/**/*.{ex,exs}"]
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]

‎.github/workflows/ci.yml‎

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name: ci
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on:
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push:
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branches: [main]
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pull_request:
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branches: [main]
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jobs:
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test:
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strategy:
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fail-fast: false
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matrix:
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include:
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- os: ubuntu-latest
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elixir: "1.16.x"
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otp: "26.x"
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- os: ubuntu-latest
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elixir: "1.17.x"
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otp: "27.x"
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- os: macos-latest
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elixir: "1.17.x"
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otp: "27.x"
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runs-on: ${{ matrix.os }}
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env:
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MIX_ENV: test
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steps:
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- uses: actions/checkout@v4
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- name: Set up Erlang/Elixir (Linux)
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if: runner.os == 'Linux'
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uses: erlef/setup-beam@v1
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with:
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otp-version: ${{ matrix.otp }}
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elixir-version: ${{ matrix.elixir }}
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- name: Set up Erlang/Elixir (macOS)
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if: runner.os == 'macOS'
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run: |
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brew install elixir
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- uses: actions/cache@v4
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with:
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path: |
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deps
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_build
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key: ${{ runner.os }}-mix-${{ matrix.otp }}-${{ matrix.elixir }}-${{ hashFiles('**/mix.lock') }}
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restore-keys: |
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${{ runner.os }}-mix-${{ matrix.otp }}-${{ matrix.elixir }}-
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- run: mix deps.get
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- run: mix compile --warnings-as-errors
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- run: mix test --include concurrency

‎.github/workflows/precompile.yml‎

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name: precompile
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on:
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push:
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tags:
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- "v*"
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workflow_dispatch:
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jobs:
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linux:
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runs-on: ubuntu-latest
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env:
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MIX_ENV: prod
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strategy:
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fail-fast: false
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matrix:
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include:
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- elixir: "1.17.x"
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otp: "26.x"
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- elixir: "1.17.x"
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otp: "27.x"
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steps:
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- uses: actions/checkout@v4
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- uses: erlef/setup-beam@v1
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with:
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otp-version: ${{ matrix.otp }}
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elixir-version: ${{ matrix.elixir }}
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- name: Cache musl cross-compilers
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id: cache-musl
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uses: actions/cache@v4
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with:
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path: |
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x86_64-linux-musl-cross
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aarch64-linux-musl-cross
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key: musl-${{ runner.os }}-build
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- if: steps.cache-musl.outputs.cache-hit != 'true'
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name: Install musl cross-compilers
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run: |
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curl -fsSL https://more.musl.cc/11.2.1/x86_64-linux-musl/x86_64-linux-musl-cross.tgz | tar -xz
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curl -fsSL https://more.musl.cc/11.2.1/x86_64-linux-musl/aarch64-linux-musl-cross.tgz | tar -xz
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- name: Install GNU cross-compilers
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run: |
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sudo apt-get update
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sudo apt-get install -y gcc make curl tar \
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gcc-aarch64-linux-gnu \
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gcc-arm-linux-gnueabihf
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echo "$PWD/x86_64-linux-musl-cross/bin" >> $GITHUB_PATH
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echo "$PWD/aarch64-linux-musl-cross/bin" >> $GITHUB_PATH
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- run: mix deps.get
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- name: Pre-compile NIF artefacts
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run: |
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export ELIXIR_MAKE_CACHE_DIR=$PWD/cache
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mkdir -p "$ELIXIR_MAKE_CACHE_DIR"
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mix elixir_make.precompile
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- uses: softprops/action-gh-release@v2
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if: startsWith(github.ref, 'refs/tags/')
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with:
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files: cache/*.tar.gz
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macos:
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runs-on: macos-latest
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env:
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MIX_ENV: prod
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strategy:
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fail-fast: false
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matrix:
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include:
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- elixir: "1.17.x"
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otp: "26.x"
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- elixir: "1.17.x"
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otp: "27.x"
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steps:
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- uses: actions/checkout@v4
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- uses: erlef/setup-beam@v1
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with:
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otp-version: ${{ matrix.otp }}
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elixir-version: ${{ matrix.elixir }}
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- run: mix deps.get
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- name: Pre-compile NIF artefacts (universal — x86_64 + arm64)
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run: |
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export ELIXIR_MAKE_CACHE_DIR=$PWD/cache
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mkdir -p "$ELIXIR_MAKE_CACHE_DIR"
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mix elixir_make.precompile
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- uses: softprops/action-gh-release@v2
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if: startsWith(github.ref, 'refs/tags/')
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with:
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files: cache/*.tar.gz

‎.gitignore‎

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# The directory Mix will write compiled artifacts to.
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/_build/
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# If you run "mix test --cover", coverage assets end up here.
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/cover/
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# The directory Mix downloads your dependencies sources to.
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/deps/
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# Where third-party dependencies like ExDoc output generated docs.
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/doc/
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# Temporary files, for example, from tests.
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/tmp/
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# If the VM crashes, it generates a dump, let's ignore it too.
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erl_crash.dump
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# Also ignore archive artifacts (built via "mix archive.build").
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*.ez
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# Ignore package tarball (built via "mix hex.build").
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image_qrcode-*.tar
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# NIF build artefacts.
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c_src/**/*.o
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priv/*.so
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priv/*.dll
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priv/*.dylib
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# elixir_make precompile cache (used during `mix elixir_make.precompile`).
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/cache/
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# Generated by `mix elixir_make.precompile`. Required at hex publish time
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# (listed in package.files) but never committed.
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checksum.exs
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‎CHANGELOG.md‎

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# Changelog
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## Image.QRCode 0.1.0
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This is the changelog for Image.QRCode version 0.1.0 released on April 28th, 2026.
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### Initial release
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* `Image.QRCode.encode/2` — encodes a string to a `Vix.Vips.Image.t/0` QR code
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with configurable error-correction level, version range, mask, scale and
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quiet-zone width.
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* `Image.QRCode.decode/1` — decodes any QR codes in a `Vix.Vips.Image.t/0`,
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with implicit conversion of arbitrary colourspaces and band formats to
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single-band 8-bit grayscale.
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* NIF binding implemented over the vendored
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[nayuki/QR-Code-generator](https://github.com/nayuki/QR-Code-generator)
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(encoder, MIT) and [dlbeer/quirc](https://github.com/dlbeer/quirc)
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(decoder, ISC) C libraries. Both encoder and decoder run on dirty CPU
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schedulers and are safe under concurrent invocation.
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* Precompiled NIF artefacts published for Linux (gnu/musl × x86_64/aarch64/
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armv7), macOS (x86_64/arm64) and Windows (x86_64) via `cc_precompiler`.

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