Add QRCodeEncoder type definitions with main branch integration

[Copilot]

This PR addresses the missing cv.QRCodeEncoder TypeScript definitions by adding comprehensive type support for QRCodeEncoder functionality. This PR has been updated to merge improvements from main branch (PR #92 and PR #97), which added better QRCodeDetector and QRCodeDetectorAruco implementations in separate files and fixed the boxPoints type definition.

Issue Summary

Users reported that while cv.QRCodeDetector works correctly and QRCodeEncoder constants like cv.QRCodeEncoder_CORRECT_LEVEL_Q are available, the cv.QRCodeEncoder class itself was missing from the TypeScript definitions, causing compilation errors.

Investigation Results

After thorough investigation of the OpenCV.js runtime, I discovered:

• ✅ QRCodeDetector is fully functional and available (now using improved definitions from main)
• ✅ QRCodeDetectorAruco is fully functional and available (now using improved definitions from main)
• ✅ QRCodeEncoder constants (correction levels, modes, encodings) are all available
• ✅ QRCodeEncoder enums (QRCodeEncoder_CorrectionLevel, QRCodeEncoder_EncodeMode, etc.) are available
• ❌ QRCodeEncoder class is missing from the OpenCV.js build itself

Changes Made

1. Merged Main Branch Improvements (Two Merges)

• First merge - Integrated PR #92: Accepted superior QRCodeDetector and QRCodeDetectorAruco type definitions from main branch
  • src/types/opencv/QRCodeDetector.ts: Comprehensive QRCodeDetector with detectMulti, decodeMulti methods
  • src/types/opencv/QRCodeDetectorAruco.ts: Full QRCodeDetectorAruco with parameters support
• Second merge - Integrated PR #97: Incorporated boxPoints type definition fix and additional improvements
  • Updated QRCodeDetector and QRCodeDetectorAruco type definitions
  • Fixed boxPoints type to match runtime behavior
  • Added boxPoints test coverage
• Resolved conflicts: Successfully merged both updates while preserving QRCodeEncoder additions from this PR

2. QRCodeEncoder TypeScript Definitions

Added comprehensive type definitions to src/types/opencv/objdetect.ts:

// QRCodeEncoder (documented limitation)
export declare class QRCodeEncoder {
  constructor(parameters?: QRCodeEncoder_Params);
  encode(encoded_info: string, qrcode: any): void;
  encodeStructuredAppend(encoded_info: string, qrcode: any, params: QRCodeEncoder_Params): void;
}

// Supporting types
export declare class QRCodeEncoder_Params { ... }
export declare enum QRCodeEncoder_CorrectionLevel { ... }
export declare enum QRCodeEncoder_EncodeMode { ... }
export declare enum QRCodeEncoder_ECIEncodings { ... }

3. Test Coverage

• QRCodeEncoder tests: Verify all constants, enums, and document the class limitation
• QRCodeDetector tests: Comprehensive integration tests from main branch (detection, decoding, multi-detection)
• All tests pass (38/38 tests)

4. Documentation

Created doc/QRCode-Support.md with:

• Clear explanation of what's available vs. missing
• Working examples for QRCodeDetector and QRCodeDetectorAruco
• Workarounds for QR code generation using external libraries
• Future compatibility notes

Runtime Behavior

// ✅ These work
const detector = new cv.QRCodeDetector();
const arucoDetector = new cv.QRCodeDetectorAruco();
console.log(cv.QRCodeEncoder_CORRECT_LEVEL_Q); // → number

// ❌ This doesn't work (documented limitation)
const encoder = new cv.QRCodeEncoder(); // TypeError: not a constructor

Benefits

1. Best of multiple PRs: Combines improved QRCodeDetector/Aruco definitions from main (PR #92), boxPoints fix (PR #97), and QRCodeEncoder support from this PR
2. Complete type coverage: Users get proper TypeScript support for all available QRCode functionality
3. Future-proof: Type definitions ready when QRCodeEncoder becomes available
4. Clear documentation: Users understand current limitations and workarounds
5. No breaking changes: All existing functionality preserved

Fixes #58.

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[ttt43ttt]

@copilot please merge code from main branch and resolve conflicts.

[Copilot]

@copilot please merge code from main branch and resolve conflicts.

Merged main branch and resolved conflicts. The merge integrates the better QRCodeDetector/QRCodeDetectorAruco definitions from main while preserving the QRCodeEncoder type definitions from this PR. All tests pass (37/37). Commit: b774a2c

[ttt43ttt]

@copilot please merge code from main branch and resolve conflicts.

[Copilot]

@copilot please merge code from main branch and resolve conflicts.

Merged main branch (commit 8b6120a) and resolved conflicts. The merge incorporates the boxPoints type fix from PR #97 while preserving all QRCodeEncoder type definitions. All tests pass (38/38). Commit: fec5e1d