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kakzaki / blue_thermal_printer

Working with thermal printer via bluetooth (Flutter)
MIT License
164 stars 205 forks source link

Print images problem #141

Closed kkooi closed 2 years ago

kkooi commented 2 years ago

I use print Image Bytes(bytes) uint8list but the image comes out with unknown characters nonstop.

s2yed commented 2 years ago

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YahalomsGuy commented 2 years ago

I use print Image Bytes(bytes) uint8list but the image comes out with unknown characters nonstop.

I am using images print with printImageBytes and noticed that my printer can only handle certain ammound of data to be printed.

Therefore, I have splitted the object I am printing to multiple parts of print, each with its own parts to print ( I have actually imlemented 4 parts, each containing the widget, it's own controller and its own capture. Here's a simplified example ( no refactoring yet....):

var imgText1 = await screenshotController1.capture(pixelRatio: ratio) ?? Uint8List(0);

bluetooth.printImageBytes(imgText1);

var imgText2 = await screenshotController2.capture(pixelRatio: ratio) ?? Uint8List(0);

bluetooth.printImageBytes(imgText2);

var imgText3 = await screenshotController3.capture(pixelRatio: ratio) ?? Uint8List(0);

bluetooth.printImageBytes(imgText3);

var imgText4 = await screenshotController4.capture(pixelRatio: ratio) ?? Uint8List(0);

bluetooth.printImageBytes(imgText4);

bluetooth.printNewLine();

github-actions[bot] commented 2 years ago

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.