passing the data one function to another function

[krishnasamy]

Hi,



I am retrieving the image from DLL through vc++ dll. Actually Image is retrieving in Callback function of main function. When I writing that image file inside of the Callback function then no problem in retrieving. At the same I want to send the Imagedata to the another function and write the same which cause the error.



Here I given that code,



//Callback function



prResponse prSTDCALL MyGetFileDataFu nction(

prHandle CameraHandle,

prObjectHandle ObjectHandle,

prContext Context,

prProgress* pProgress

)

{

static ofstream out("capture.jp g", ios::out|ios::b inary);


switch( pProgress->lMessage )

{

prUInt8 imgbuffer[1024];


case prMSG_DATA_HEAD ER:

break;

case prMSG_DATA:

for (prUInt32 index = 0; index < pProgress->lLength; index++)

{

imgbuffer[index] = pProgress->pbData[index];

}





PowershotDll::P owershotSdkDll: :Copy(imgbuffer ,pProgress->lLength); //Calling another function and send the data

memcpy(CaptureI mage,imgbuffer, 1024L);

out.write((cons t char*)CaptureIm age,1024L);


break;

case prMSG_TERMINATI ON:

out.close();


break;

}





return prOK;

}



Copy function:

void PowershotSdkDll ::Copy(prUInt8 *pDataBuffer, prUInt32 dataLength)

{

// Byte managedDataBuff er __gc[] = new System::Byte[dataLength];

BYTE managedDataBuff er[1024];


for (prUInt32 index = 0; index < dataLength; index++)

{

managedDataBuff er[index] = pDataBuffer[index];

}

/// Write the data to the memoryStream

//pMemoryStream->Write(managedD ataBuffer, 0, dataLength);

static ofstream out1("Copycaptu re.jpg", ios::out|ios::b inary|ios::app) ;

out1.write((con st char*)managedDa taBuffer, 1024L);

out1.close();


}



I got the image capture.jpg but i didnt get the copycapture.jpg image which contain only 1024 bytes.

How to re-assign the array for every data?

Pleae give your suggestion.

[krishnasamy]

----

Now I have changed my function as follows,

Default declaration:

static ofstream out("capture.jpg", ios::out|ios::binary);
 
void PowershotSdkDll::Copy(prUInt8 *pDataBuffer, prUInt32 dataLength)
    {
    out.write((const char*)pDataBuffer, dataLength);
    out.close();
 
 
    }
 

In Callback function:

prResponse prSTDCALL  MyGetFileDataFunction(
    prHandle       CameraHandle,
    prObjectHandle ObjectHandle,
    prContext      Context,
    prProgress*    pProgress
)
{
    /* Display progress */
 
 
        switch( pProgress->lMessage )
        {
            //prUInt8        imgbuffer[1024];
 
 
            case prMSG_DATA_HEADER:
            break;
            case prMSG_DATA:
 
 
 
            PowershotDll::PowershotSdkDll::Copy(pProgress->pbData,pProgress->lLength);        
                    break;
 
            case prMSG_TERMINATION:
 
            break;
        }
 
 
 
    return prOK;
}
 

But I have retrieved the last block image data only. What is the problem?