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Add APNG read/write support #283

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3 changes: 3 additions & 0 deletions .gitignore
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Expand Up @@ -7,6 +7,9 @@
/check_build/
/benchmark_images/
/subprojects/*/
!/subprojects/packagefiles
/subprojects/.wraplock
/.cache/
/.vscode/
/.frama-c/
/trash/
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2 changes: 1 addition & 1 deletion README.md
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Expand Up @@ -32,7 +32,7 @@ it outperforms the reference implementation in common use cases.
| Parses all standard chunks | ✅ | ✅ | ❌ | ❌ |
| Doesn't require zlib<sup>[2]</sup> | ✅ | ❌ | ✅ | ✅ |
| Encoding | ✅ | ✅ | ✅ | ✅ |
| Animated PNG | Planned | ✅<sup>[3]</sup> | ❌ | ❌ |
| Animated PNG | ✅ | ✅<sup>[3]</sup> | ❌ | ❌ |

<sup>[1]</sup> The project is fuzz tested on [OSS-Fuzz](https://github.com/google/oss-fuzz) and vulnerabilities are fixed before they become public.

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15 changes: 15 additions & 0 deletions docs/build.md
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Expand Up @@ -30,6 +30,21 @@ ninja
ninja install
```

## Testing

Tests require [libpng](http://libpng.org/pub/png/libpng.html) with Animated PNG (APNG) support
and are enabled through the `dev_build` option:

```bash
meson setup build -Ddev_build=true
cd build
meson test
```

If the system libpng does not include APNG support, a fallback is provided
that downloads libpng 1.6 and applies the APNG patch automatically.
This requires Meson 0.63 or newer.

## Embedding the source code

The source files `spng.c`/`spng.h` can be embedded in a project without
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