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ScreenClient.cpp

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// ScreenClient.cpp: implementation of the ScreenClient class.


#include "stdafx.h"
#include "ScreenClient.h"

// Construction

ScreenClient::ScreenClient(const TString &name)
:PClient(TString( TEXT("SCREEN") ) + name, true)
{}

// Member Functions

bool ScreenClient::write(const int width, 
                      const int height, 
                      const int clrUsed, 
                      const int bitCount, 
                      const RGBTRIPLE* palette, 
                      const LPBYTE imageBits)
{
    screenInfo header;
    DWORD numBytesWritten;
    bool fOk;

    if( (palette == NULL && clrUsed > 0) || imageBits == NULL )
        return false;

    header.hdrSize = sizeof(screenInfo);
    header.width = width;
    header.height = height;
    header.clrUsed = clrUsed;
    header.bitCount = bitCount;

    fOk = !WriteFile(hPipe,
            &header,
            sizeof(screenInfo),
            &numBytesWritten,
            NULL);

    if( fOk || (numBytesWritten != sizeof(screenInfo)) )
        return false;

    if(palette != NULL){
        fOk = !WriteFile(hPipe,
            palette,
            sizeof(RGBTRIPLE) * clrUsed,
            &numBytesWritten,
            NULL);

        if( fOk || (numBytesWritten != (sizeof(RGBTRIPLE) * clrUsed)) )
            return false;

    }

    /* \note see DIBitmap documentation for an explanation of this formula */
    DWORD size = (((( width * bitCount ) + 31) & ~31) >> 3) * height;

    fOk = !WriteFile(hPipe,
            imageBits,
            size,
            &numBytesWritten,
            NULL);

    if( fOk || (numBytesWritten != size) )
        return false;

    return true;
}

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