image_v3

Description:

image v3

image #


Overview #
A Dart library providing the ability to load, save and manipulate images in a variety of different file formats.
The library is written entirely in Dart and has no reliance on dart:io, so it can be used for both
server and web applications.
Performance Warning #
Because this library is written entirely in Dart and is a not native executed library, its performance
will not be as fast as a native library.
Supported Image Formats #
Read/Write

PNG / Animated APNG
JPEG
Targa
GIF / Animated GIF
PVR(PVRTC)
ICO
BMP

Read Only

WebP / Animated WebP
TIFF
Photoshop PSD
OpenEXR

Write Only

CUR

Documentation #
API #
Examples #
Format Decoding Functions #
Example #
Load an image asynchronously and resize it as a thumbnail.
import 'dart:io';
import 'dart:isolate';
import 'package:image/image.dart';

class DecodeParam {
final File file;
final SendPort sendPort;
DecodeParam(this.file, this.sendPort);
}

void decodeIsolate(DecodeParam param) {
// Read an image from file (webp in this case).
// decodeImage will identify the format of the image and use the appropriate
// decoder.
var image = decodeImage(param.file.readAsBytesSync())!;
// Resize the image to a 120x? thumbnail (maintaining the aspect ratio).
var thumbnail = copyResize(image, width: 120);
param.sendPort.send(thumbnail);
}

// Decode and process an image file in a separate thread (isolate) to avoid
// stalling the main UI thread.
void main() async {
var receivePort = ReceivePort();

await Isolate.spawn(
decodeIsolate, DecodeParam(File('test.webp'), receivePort.sendPort));

// Get the processed image from the isolate.
var image = await receivePort.first as Image;

await File('thumbnail.png').writeAsBytes(encodePng(image));
}
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