### Install Python Dependencies for sync.py

Source: https://github.com/laurenzv/hayro/blob/main/hayro-tests/README.md

Installs the 'rich' Python package required by the sync.py script. Run this command before executing sync.py.

```bash
python3 -m pip install --user rich
```

--------------------------------

### Run Hayro Fuzzer

Source: https://github.com/laurenzv/hayro/blob/main/hayro-fuzz/cmds.txt

Executes the Hayro fuzzer with specified parameters. Use this to start fuzzing a target like fuzz_jpeg2000.

```bash
cargo +nightly fuzz run fuzz_jpeg2000 --fuzz-dir . -- -print_final_stats=1 -timeout=3 -fork=$(sysctl -n hw.ncpu) -max_len=100000 -ignore_timeouts=1 -ignore_crashes=1 -ignore_ooms=1
```

--------------------------------

### Generate Baseline Snapshots

Source: https://github.com/laurenzv/hayro/blob/main/hayro-jpeg2000/TESTS.md

Execute this command to render all manifest entries and create initial PNG snapshots. This is useful for seeding the snapshot directory.

```bash
REPLACE=1 cargo test --release
```

--------------------------------

### Run Normal Test Suite

Source: https://github.com/laurenzv/hayro/blob/main/hayro-jpeg2000/TESTS.md

Run the test suite to verify changes against existing snapshots. If intentional changes are made to the decoder output, rerun with REPLACE=1 to update snapshots, then rerun without REPLACE to confirm.

```bash
cargo test  --release
```

--------------------------------

### Synchronize Test Inputs

Source: https://github.com/laurenzv/hayro/blob/main/hayro-jpeg2000/TESTS.md

Run this script to download test inputs from the remote asset server. Use --force to redownload files even if a cached copy exists.

```bash
python3 sync.py
```

--------------------------------

### Generate Baseline Snapshots

Source: https://github.com/laurenzv/hayro/blob/main/hayro-tests/README.md

Runs the Hayro test suite in release mode to generate initial reference image snapshots. These are stored in the 'snapshots/' directory.

```bash
cargo test --release
```

--------------------------------

### Load PDF and Iterate Page Content Streams in Rust

Source: https://github.com/laurenzv/hayro/blob/main/hayro-syntax/README.md

Demonstrates loading a PDF file from bytes and iterating through the content stream operators of each page. Ensure proper error handling for file reading.

```rust
use hayro_syntax::Pdf;
use std::path::PathBuf;

// First load the data that constitutes the PDF file.
let data = std::fs::read(
    PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("../hayro-tests/pdfs/custom/text_with_rise.pdf"),
)
.unwrap();

// Then create a new PDF file from it.
//
// Here we are just unwrapping in case reading the file failed, but you
// might instead want to apply proper error handling.
let pdf = Pdf::new(data).unwrap();

// First access all pages, and then iterate over the operators of each page's
// content stream and print them.
let pages = pdf.pages();
for page in pages.iter() {
    let mut ops = page.typed_operations();

    while let Some(op) = ops.next() {
        println!("{op:?}");
    }
}
```

--------------------------------

### Reduce Test Case with Hayro Fuzzer

Source: https://github.com/laurenzv/hayro/blob/main/hayro-fuzz/cmds.txt

Minimizes a specific test case, such as a crash artifact, to find the smallest reproducible input. Use the crash file path after the artifact name.

```bash
cargo +nightly fuzz tmin --fuzz-dir . fuzz_jpeg2000 artifacts/fuzz_jpeg2000/crash-{}
```

--------------------------------

### Decode JPEG 2000 Image in Rust

Source: https://github.com/laurenzv/hayro/blob/main/hayro-jpeg2000/README.md

Reads a JPEG 2000 image from a file and decodes it into a bitmap. Requires the `hayro_jpeg2000` crate and default decode settings.

```rust
use hayro_jpeg2000::{Image, DecodeSettings};

let data = std::fs::read("image.jp2").unwrap();
let image = Image::new(&data, &DecodeSettings::default()).unwrap();

println!(
    "{}x{} image in {:?} with alpha={}",
    image.width,
    image.height,
    image.color_space,
    image.has_alpha,
);

let bitmap = image.decode().unwrap();
```

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