Print Uint8List

[blue492]

Hi, thanks for this package.

I want to print base64 pdf or base64 image. Is it possible to print Uint8List in printSingleBitmap or is there another function to print it?

Here is my code:

import 'dart:convert';
import 'dart:typed_data';

import 'package:image/image.dart' as img;
import 'package:imin_printer/imin_printer.dart';
import 'package:pdfx/pdfx.dart';

  Future<void> printBase64Image(String base64Image) async {
    final base64String = base64Image.split(',').last;          // Remove 'data:image/png;base64,'
    final Uint8List imageBytes = base64Decode(base64String);

    final iminPrinter = IminPrinter();
    await iminPrinter.initPrinter();

    await iminPrinter.printSingleBitmap(imageBytes);      
    await iminPrinter.fullCut();

  }

  Future<void> printBase64Pdf(String base64Pdf) async {
    final Uint8List pdfBytes = base64Decode('data:application/pdf;base64,' + base64Pdf);
    final doc = await PdfDocument.openData(pdfBytes);
    final page = await doc.getPage(1);
    final imgPage = await page.render(
      width: page.width, height: page.height,
      format: PdfPageImageFormat.png,
    );
    await page.close();
    await doc.close();

    final png = imgPage!.bytes;
    if (png == null || png.isEmpty) {
      print('❌ Render failed');
      return;
    }

    final original = img.decodeImage(png)!;
    final resized = original.width > maxWidth
        ? img.copyResize(original, width: maxWidth)
        : original;
    final mono = img.luminanceThreshold(resized, threshold: 0.5);
    final monoBytes = Uint8List.fromList(img.encodePng(mono));

    final iminPrinter = IminPrinter();
    await iminPrinter.initPrinter();

    await iminPrinter.printSingleBitmap(monoBytes);        
    await iminPrinter.fullCut();
  }

[iminsoftware]

上面有使用示例，你可以参考一下