Function EncodeLowLevel

czxing/src/main/cpp/zxing/src/pdf417/PDFEncoder.cpp:396–441

}

static BarcodeMatrix EncodeLowLevel(const std::vector<int>& fullCodewords, int c, int r, int errorCorrectionLevel, bool compact)
{
	BarcodeMatrix logic;
	logic.init(r, c);

	int idx = 0;
	for (int y = 0; y < r; y++) {
		int cluster = y % 3;
		logic.startRow();
		EncodeChar(START_PATTERN, 17, logic.currentRow());

		int left;
		int right;
		if (cluster == 0) {
			left = (30 * (y / 3)) + ((r - 1) / 3);
			right = (30 * (y / 3)) + (c - 1);
		}
		else if (cluster == 1) {
			left = (30 * (y / 3)) + (errorCorrectionLevel * 3) + ((r - 1) % 3);
			right = (30 * (y / 3)) + ((r - 1) / 3);
		}
		else {
			left = (30 * (y / 3)) + (c - 1);
			right = (30 * (y / 3)) + (errorCorrectionLevel * 3) + ((r - 1) % 3);
		}

		int pattern = CODEWORD_TABLE[cluster][left];
		EncodeChar(pattern, 17, logic.currentRow());

		for (int x = 0; x < c; x++) {
			pattern = CODEWORD_TABLE[cluster][fullCodewords[idx]];
			EncodeChar(pattern, 17, logic.currentRow());
			idx++;
		}

		if (compact) {
			EncodeChar(STOP_PATTERN, 1, logic.currentRow()); // encodes stop line for compact pdf417
		}
		else {
			pattern = CODEWORD_TABLE[cluster][right];
			EncodeChar(pattern, 17, logic.currentRow());
			EncodeChar(STOP_PATTERN, 18, logic.currentRow());
		}
	}
	return logic;
}

/**
* Determine optimal nr of columns and rows for the specified number of