captcha_generator 0.0.1

A Flutter package to generate captcha images with custom text, colors, and styles.

Flutter CAPTCHA Generator

A simple and customizable CAPTCHA generator for Flutter applications. This package allows you to generate CAPTCHA images with random text, distortion effects, and easy verification.

Features

• Generate random CAPTCHA images
• Customizable text length, font size, and colors
• Enable or disable distortion for added security
• Easy verification of user input

Example CAPTCHA Output

Installation

Add this package to your pubspec.yaml:

dependencies:
  captcha_generator: latest

Then, run:

flutter pub get

Usage

Import the package

import 'package:captcha_generator/captcha_generator.dart';

Generate and Verify CAPTCHA

final CaptchaController _captchaController = CaptchaController();
Uint8List? _captchaBytes;

void generateCaptcha() async {
  _captchaBytes = await _captchaController.generateCaptchaImage();
}

bool isValid = _captchaController.verifyCaptcha(userInput);

API Reference

CaptchaController

• generateCaptchaImage() → Generates a new CAPTCHA image and returns Uint8List.
• verifyCaptcha(String userInput) → Verifies user input against the generated CAPTCHA text. Returns true if matched, false otherwise.

Customization

You can customize the CAPTCHA using the CaptchaController constructor:

CaptchaController(
  length: 6, // Length of the CAPTCHA text
  fontSize: 30.0, // Font size of CAPTCHA text
  textColor: Colors.black, // Text color
  backgroundColor: Colors.grey, // Background color
  enableDistortion: true, // Enable distortion for security
  includeLowercase: false, // Adds lowercase to the captcha text
);

License

This project is licensed under the MIT License.

Contributions

Feel free to contribute by submitting issues or pull requests!

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Happy coding! 🚀