Getting started

Install Pixer and process an image with the Dart API.

Install Pixer

dependencies:
  pixer: ^0.0.10

Run your package manager as usual:

dart pub get

Pixer’s build hook downloads the matching native binary for the current platform. The package and binary ABI versions must match.

Load an image

Load from a path on native platforms:

final image = Pixer.fromFile('photo.jpg');

Or load bytes on every platform, including the web:

final bytes = await File('photo.png').readAsBytes();
final image = Pixer.fromMemory(bytes);

Pixer auto-detects the format. Use fromMemoryWithFormat only when the format must be supplied explicitly.

Transform and encode

final image = Pixer.fromFile('photo.jpg');
try {
  final thumbnail = image.resize(640, 640);
  try {
    final bytes = thumbnail.encode(PixerJpegEncoder(quality: 85));
    await File('thumbnail.jpg').writeAsBytes(bytes);
  } finally {
    thumbnail.dispose();
  }
} finally {
  image.dispose();
}

resize preserves aspect ratio and fits the image within the requested bounds. Use resizeExact when the output must have those exact dimensions.

Supported formats

Pixer decodes and encodes PNG, JPEG, GIF, WebP, BMP, ICO, and TIFF.