windows-nt/Source/XPSP1/NT/printscan/wia/test/wiatest2/wiadatacallback.cpp

// WiaDataCallback.cpp: implementation of the CWiaDataCallback class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "wiatest.h"
#include "WiaDataCallback.h"

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

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

CWiaDataCallback::CWiaDataCallback()
{
    m_cRef              = 0;
    m_pBuffer           = NULL;
    m_BytesTransferred  = 0;    
    m_pAcquireDlg       = NULL;    
    m_lBufferSize       = 65535; // default
    m_bBitmapData       = FALSE;
    m_bNewPageArrived   = TRUE;

    // initialize progress dialog
    m_pAcquireDlg = new CWiaAcquireDlg();
    if(m_pAcquireDlg){
        m_pAcquireDlg->Create(IDD_DATA_ACQUISITION_DIALOG,NULL);
        m_pAcquireDlg->ShowWindow(TRUE);
    }
}

CWiaDataCallback::~CWiaDataCallback()
{
    if (m_pBuffer != NULL){
        LocalFree(m_pBuffer);
        m_pBuffer = NULL;
    }
    if(m_pAcquireDlg){
        m_pAcquireDlg->DestroyWindow();
        delete m_pAcquireDlg;
        m_pAcquireDlg = NULL;
    }
}

HRESULT _stdcall CWiaDataCallback::QueryInterface(const IID& iid, void** ppv)
{
    *ppv = NULL;
    if (iid == IID_IUnknown || iid == IID_IWiaDataCallback)
        *ppv = (IWiaDataCallback*) this;
    else
        return E_NOINTERFACE;
    AddRef();
    return S_OK;
}

ULONG   _stdcall CWiaDataCallback::AddRef()
{
    InterlockedIncrement((long*) &m_cRef);
    return m_cRef;
}

ULONG   _stdcall CWiaDataCallback::Release()
{
    ULONG ulRefCount = m_cRef - 1;
    if (InterlockedDecrement((long*) &m_cRef) == 0)
    {
        delete this;
        return 0;
    }
    return ulRefCount;
}

HRESULT _stdcall CWiaDataCallback::BandedDataCallback(LONG lMessage, LONG lStatus,
                                                      LONG lPercentComplete, LONG  lOffset,
                                                      LONG lLength, LONG lReserved, LONG lResLength, BYTE* pbBuffer)
{
    // check for cancel button presses
    if(m_pAcquireDlg->CheckCancelButton()){
        return S_FALSE;
    }

    PWIA_DATA_CALLBACK_HEADER pHeader = NULL;
    switch (lMessage) {
    case IT_MSG_DATA_HEADER:
        pHeader = (PWIA_DATA_CALLBACK_HEADER)pbBuffer;
        if(pHeader->guidFormatID == WiaImgFmt_MEMORYBMP){
            m_bBitmapData = TRUE;
        }
        m_MemBlockSize      = pHeader->lBufferSize;                
        if(m_MemBlockSize <= 0)
            m_MemBlockSize = m_lBufferSize;
        
        m_pBuffer           = (PBYTE)LocalAlloc(LPTR,m_MemBlockSize);
        m_BytesTransferred  = 0;
        UpdateAcqusitionDialog(TEXT("IT_MSG_DATA_HEADER"),lPercentComplete);
        break;        
    case IT_MSG_DATA:
        if(m_bNewPageArrived){
            m_BytesTransferred = 0;
            m_bNewPageArrived = FALSE;
        }
        if (m_pBuffer != NULL) {                
            m_BytesTransferred += lLength;
            if(m_BytesTransferred >= m_MemBlockSize){                
                m_MemBlockSize += (lLength * MEMORY_BLOCK_FACTOR);
                m_pBuffer = (PBYTE)LocalReAlloc(m_pBuffer,m_MemBlockSize,LMEM_MOVEABLE);
            }                
            memcpy(m_pBuffer + lOffset, pbBuffer, lLength);
        }                
        UpdateAcqusitionDialog(TEXT("IT_MSG_DATA"),lPercentComplete);        
        break;
    case IT_MSG_STATUS:
        if (lStatus & IT_STATUS_TRANSFER_FROM_DEVICE){
            UpdateAcqusitionDialog(TEXT("IT_MSG_STATUS\n(IT_STATUS_TRANSFER_FROM_DEVICE)"),lPercentComplete);
        } else if (lStatus & IT_STATUS_PROCESSING_DATA){
            UpdateAcqusitionDialog(TEXT("IT_MSG_STATUS\n(IT_STATUS_PROCESSING_DATA)"),lPercentComplete);
        } else if (lStatus & IT_STATUS_TRANSFER_TO_CLIENT) {
            UpdateAcqusitionDialog(TEXT("IT_MSG_STATUS\n(IT_STATUS_TRANSFER_TO_CLIENT)"),lPercentComplete);
        }
        break;        
    case IT_MSG_NEW_PAGE:
        UpdateAcqusitionDialog(TEXT("IT_MSG_NEWPAGE"),0);
        pHeader = (PWIA_DATA_CALLBACK_HEADER)pbBuffer;
        m_lPageCount =  pHeader->lPageCount;        
        m_bNewPageArrived = TRUE;
        break;
    case IT_MSG_FILE_PREVIEW_DATA:
        UpdateAcqusitionDialog(TEXT("IT_MSG_FILE_PREVIEW_DATA"),-1);
        break;
    case IT_MSG_FILE_PREVIEW_DATA_HEADER:
        UpdateAcqusitionDialog(TEXT("IT_MSG_FILE_PREVIEW_DATA_HEADER"),-1);
        break;
    case IT_MSG_TERMINATION:
        UpdateAcqusitionDialog(TEXT("IT_MSG_TERMINATION"),-1);
        break;
    default:
        break;
    }
    return S_OK;
}

void CWiaDataCallback::UpdateAcqusitionDialog(TCHAR *szMessage, LONG lPercentComplete)
{
    m_pAcquireDlg->SetCallbackMessage(szMessage);    
    if(lPercentComplete > -1){
        m_pAcquireDlg->SetPercentComplete(lPercentComplete);
        m_pAcquireDlg->m_AcquireProgressCtrl.SetPos(lPercentComplete);
    }
}

void CWiaDataCallback::SetBufferSizeRequest(LONG lBufferSize)
{
    m_lBufferSize = lBufferSize;
}

BYTE* CWiaDataCallback::GetCallbackMemoryPtr(LONG *plDataSize)
{
    *plDataSize = m_BytesTransferred;
    return m_pBuffer;    
}

BOOL CWiaDataCallback::IsBITMAPDATA()
{
    return m_bBitmapData;
}