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Drawing UPCA/E barcodes

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2 Nov 20054 min read 64.2K   1.9K   55  
Drawing UPCA/E barcodes based on Neil Van Eps' and Rainman_63's articles.
 
// UPC.cpp: implementation of the CUPC class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "UPCAE.h"
#include "UPC.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CUPC::CUPC()
{
	m_nSymbology = UPCA;
}

CUPC::CUPC(int nSymbology)
{
	m_nSymbology = nSymbology;
}


CUPC::~CUPC()
{

}

void CUPC::LoadData(CString csMessage, double dNarrowBar, double dFinalHeight, long nGuardbarHeight, HDC hDC, int nStartingXPixel, int nStartingYPixel, double dRatio)
{
	m_nGuardbarHeight = nGuardbarHeight;

	//standardize the message
	int nLen = csMessage.GetLength();
	int i,nNumberOfAdditionZero = m_nSymbology == UPCA ? 11 - nLen : 7 - nLen;

	if (nNumberOfAdditionZero > 0){ // missing some numbers
		
		for (i = 0 ; i < nNumberOfAdditionZero ; i ++)
			csMessage = '0' + csMessage ;// just adding zeros at the head of message
	}
	else if (nNumberOfAdditionZero < 0){ 
		if (m_nSymbology == UPCA)
				csMessage.Delete(10,-nNumberOfAdditionZero);
		else
				csMessage.Delete(6,-nNumberOfAdditionZero);
	}
		
	CBarcode::LoadData(csMessage,dNarrowBar,dFinalHeight,hDC,nStartingXPixel,nStartingYPixel,dRatio);
}


long CUPC::CalculateCheckSumDigit()
{
	int i, nLen, nSum = 0, nItem;
	nLen = m_csMessage.GetLength();

	for (i = 0 ; i < nLen ; i++){
		nItem = i%2 ? ((int)m_csMessage.GetAt(i)-48)*1 : ((int)m_csMessage.GetAt(i)-48)*3;
		nSum += nItem;
	}

	nSum %= 10;
	return (10-nSum)%10;
}


CString CUPC::RetrieveSystemNumberPattern(int iSystemNumber /* = 0 */, int iNumber)
{
	CString strCharPattern;
	if (iSystemNumber == 0){
		switch (iNumber){
			case 0: 
				strCharPattern = "EEEOOO"; 
				break;
			case 1: 
				strCharPattern = "EEOEOO"; 
				break;
			case 2: 
				strCharPattern = "EEOOEO"; 
				break;
			case 3: 
				strCharPattern = "EEOOOE"; 
				break;
			case 4: 
				strCharPattern = "EOEEOO"; 
				break;
			case 5:
				strCharPattern = "EOOEEO"; 
				break;
			case 6: 
				strCharPattern = "EOOOEE"; 
				break;
			case 7:
				strCharPattern = "EOEOEO"; 
				break;
			case 8: 
				strCharPattern = "EOEOOE"; 
				break;
			case 9: 
				strCharPattern = "EOOEOE"; 
				break;
		}
	}
	else{
		switch(iNumber){
			case 0: 
				strCharPattern = "OOOEEE"; 
				break;
			case 1: 
				strCharPattern = "OOEOEE"; 
				break;
			case 2: 
				strCharPattern = "OOEEOE"; 
				break;
			case 3: 
				strCharPattern = "OOEEEO"; 
				break;
			case 4: 
				strCharPattern = "OEOOEE"; 
				break;
			case 5: 
				strCharPattern = "OEEOOE"; 
				break;
			case 6: 
				strCharPattern = "OEEEOO"; 
				break;
			case 7: 
				strCharPattern = "OEOEOE"; 
				break;
			case 8: 
				strCharPattern = "OEOEEO"; 
				break;
			case 9: 
				strCharPattern = "OEEOEO"; 
				break;
		}
	}
	return strCharPattern;
}


CString CUPC::RetrieveLeftOddParityPattern(int iNumber)
{
	CString strCharPattern;

	switch(iNumber){
		case 0: 
			strCharPattern = "sssbbsb"; 
			break;
		case 1: 
			strCharPattern = "ssbbssb";
			break;
		case 2: 
			strCharPattern = "ssbssbb"; 
			break;
		case 3: 
			strCharPattern = "sbbbbsb"; 
			break; 
		case 4: 
			strCharPattern = "sbsssbb"; 
			break; 
		case 5: 
			strCharPattern = "sbbsssb"; 
			break;
		case 6:
			strCharPattern = "sbsbbbb";
			break;
		case 7:
			strCharPattern = "sbbbsbb"; 
			break;
		case 8:
			strCharPattern = "sbbsbbb";
			break; 
		case 9:
			strCharPattern = "sssbsbb"; 
			break;
	}
	return strCharPattern;
}


CString CUPC::RetrieveLeftEvenParityPattern(int iNumber)
{
	CString strCharPattern;
	
	switch(iNumber){
		case 0: 
			strCharPattern = "sbssbbb";
			break;
		case 1: 
			strCharPattern = "sbbssbb";
			break; 
		case 2:
			strCharPattern = "ssbbsbb";
			break; 
		case 3: 
			strCharPattern = "sbssssb";
			break;
		case 4:
			strCharPattern = "ssbbbsb";
			break;
		case 5:
			strCharPattern = "sbbbssb";
			break;
		case 6: 
			strCharPattern = "ssssbsb";
			break; 
		case 7: 
			strCharPattern = "ssbsssb";
			break;
		case 8: 
			strCharPattern = "sssbssb"; 
			break;
		case 9:
			strCharPattern = "ssbsbbb";
			break;
	}
	return strCharPattern;
}



CString CUPC::RetrieveLeftPattern(int iNumber)
{
	CString strCharPattern;
	
	switch(iNumber){
		case 0: 
			strCharPattern = "sssbbsb";
			break; 
		case 1:
			strCharPattern = "ssbbssb";
			break; 
		case 2: 
			strCharPattern = "ssbssbb";
			break; 
		case 3:
			strCharPattern = "sbbbbsb"; 
			break; 
		case 4:
			strCharPattern = "sbsssbb"; 
			break; 
		case 5:
			strCharPattern = "sbbsssb";
			break; 
		case 6: 
			strCharPattern = "sbsbbbb";
			break; 
		case 7: 
			strCharPattern = "sbbbsbb";
			break; 
		case 8:
			strCharPattern = "sbbsbbb";
			break; 
		case 9: 
			strCharPattern = "sssbsbb"; 
			break;
	}

	return strCharPattern;
}


CString CUPC::RetrieveRightPattern(int iNumber)
{
	CString strCharPattern;
	
	switch(iNumber){
		case 0: 
			strCharPattern = "bbbssbs";
			break; 
		case 1:
			strCharPattern = "bbssbbs";
			break; 
		case 2: 
			strCharPattern = "bbsbbss";
			break; 
		case 3:
			strCharPattern = "bssssbs"; 
			break; 
		case 4:
			strCharPattern = "bsbbbss"; 
			break; 
		case 5:
			strCharPattern = "bssbbbs";
			break; 
		case 6: 
			strCharPattern = "bsbssss";
			break; 
		case 7: 
			strCharPattern = "bsssbss";
			break; 
		case 8:
			strCharPattern = "bssbsss";
			break; 
		case 9: 
			strCharPattern = "bbbsbss"; 
			break;
	}

	return strCharPattern;
}

void CUPC::DrawPattern(CString csPattern)
{
	int			i,nXPixel,nYPixel;
	CDC			oDC;

	// attach to the device context
	oDC.Attach(m_hDC);

	// initialize X pixel value
	nXPixel = m_nStartingXPixel;
	
	for (i=0;i<csPattern.GetLength();i++)
	{
		// X value for loop
		for (nXPixel=m_nStartingXPixel;nXPixel<m_nStartingXPixel+m_nNarrowBarPixelWidth;nXPixel++)
		{
			// Y value for loop
			for (nYPixel=m_nStartingYPixel;nYPixel<m_nStartingYPixel+m_nPixelHeight+m_nGuardbarHeight;nYPixel++)
			{
				// if this is a bar
				if (csPattern.GetAt(i)=='b')
					oDC.SetPixelV(nXPixel,nYPixel,COLORBLACK);

			//	else
				//	oDC.SetPixelV(nXPixel,nYPixel,COLORWHITE);
			}
		}

		// advance the starting position
		m_nStartingXPixel+= m_nNarrowBarPixelWidth;
	}

	// detach from the device context
	oDC.Detach();
	
	return;

}

void CUPC::DrawUPCA()
{
	int i, tmpGuardBarHeight;
	
	DrawPattern("sssssssss"); // draw quite zone	
	DrawPattern("bsb"); // draw lead

	DrawPattern(RetrieveLeftPattern((int)m_csMessage.GetAt(0)-48)); // draw number system
	
	tmpGuardBarHeight = m_nGuardbarHeight;
	m_nGuardbarHeight = 0;

	for (i = 1 ; i < 6 ; i++)// draw manufacturer code
		DrawPattern(RetrieveLeftPattern((int)m_csMessage.GetAt(i)-48));

	m_nGuardbarHeight = tmpGuardBarHeight;

	DrawPattern("sbsbs"); // draw separator bars

	tmpGuardBarHeight = m_nGuardbarHeight;
	m_nGuardbarHeight = 0;

	for (i = 6 ; i < 11 ; i ++) // draw product code
		DrawPattern(RetrieveRightPattern((int)m_csMessage.GetAt(i)-48));

	m_nGuardbarHeight = tmpGuardBarHeight;
	DrawPattern(RetrieveRightPattern(CalculateCheckSumDigit())); //draw check sum digits
 
	
	DrawPattern("bsb"); // draw trailer bars
	DrawPattern("sssssssss"); // draw quite zone 

}

void CUPC::DrawUPCE()
{
	
	int i,nCheckDigit, nSystemNumber, tmpGuardBarHeight;

	nSystemNumber = (int)m_csMessage.GetAt(0)-48;
	nCheckDigit = CalculateCheckSumDigit();
	
	CString strSystemNumberPattern = RetrieveSystemNumberPattern(nSystemNumber,nCheckDigit);

	DrawPattern("sssssssss"); // draw quite zone	
	DrawPattern("bsb"); // draw lead
	
	tmpGuardBarHeight = m_nGuardbarHeight;
	m_nGuardbarHeight = 0;
	
	for (i = 1 ; i < 7 ; i ++){
		if (strSystemNumberPattern[i-1] == 'O')
			DrawPattern(RetrieveLeftOddParityPattern((int)m_csMessage.GetAt(i)-48));

		if (strSystemNumberPattern[i-1] == 'E')
			DrawPattern(RetrieveLeftEvenParityPattern((int)m_csMessage.GetAt(i)-48));
	}

	m_nGuardbarHeight = tmpGuardBarHeight;

	DrawPattern("sbsbs"); // draw separator bars
	DrawPattern("b"); // draw trailer bars
	DrawPattern("sssssssss"); // draw quite zone 

}


void CUPC::DrawBitmap()
{
	if (m_nSymbology == UPCA)
		DrawUPCA();
	else
		DrawUPCE();
}

void CUPC::BitmapToClipboard()
{
}

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Written By
Lam Do
Software Developer (Senior)
Vietnam Vietnam
I joined CodeProject since working in MFC/C++ applications. For some personal reasons, I switched to Flash/Flex web applications and joined Pyramid Consulting Vietnam. I left Pyramid Consulting Vietnam in 2009 and started my free-lance jobs. Now I am a professional multimedia developer with specialized in Flash/Flex technologies and intend to turn back this community as a chance to contribute my knowledge in Flash/Flex technologies.

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Posted 2 Nov 2005

Article Copyright 2005 by Lam Do
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