C / C++ / MFC

BOOL CMeineFormDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Symbol für dieses Dialogfeld festlegen. Wird automatisch erledigt
	//  wenn das Hauptfenster der Anwendung kein Dialogfeld ist
	SetIcon(m_hIcon, TRUE);					// Großes Symbol verwenden
	SetIcon(m_hIcon, FALSE);				// Kleines Symbol verwenden

	// TODO: Hier zusätzliche Initialisierung einfügen

	CBitmap bg_Image;						// Bild erstellen
	bg_Image.LoadBitmap(IDB_BITMAP1);		// Bild aus Resource laden

	BITMAP bBitmap;							// Damit man auf die Daten des Bitmap zugreifen kann
	bg_Image.GetBitmap(&bBitmap);			// Daten reinladen aus dem CBitmap
	
	int  iByteSize = bBitmap.bmWidthBytes * bBitmap.bmHeight * (bBitmap.bmBitsPixel/8);
    BYTE *pBuffer = new BYTE[iByteSize];

	bg_Image.GetBitmapBits(iByteSize, pBuffer);

	CRgn    newRgn;							// Eine neue Region für den Dialog
	newRgn.CreateRectRgn(0,0,0,0);

	CRgn	tmpRgn;							// Eine Temporäre Region
	
	int iOffset = bBitmap.bmBitsPixel/8;
	int r,g,b,c;
	for (int y=0; y< bBitmap.bmHeight; ++y)
	{
		for (int x=0; x < bBitmap.bmWidth; ++x)
		{
			c = y*bBitmap.bmWidthBytes + x*iOffset;
			r = pBuffer[c+2];
			g = pBuffer[c+1];
			b = pBuffer[c];

			if (r == 255 && g == 255 && b == 255)					// weiß
			{
				tmpRgn.DeleteObject();								// Die Region erstmal leer machen
				tmpRgn.CreateRectRgn(x,y,x+1,y+1);
				newRgn.CombineRgn(&newRgn, &tmpRgn, RGN_OR);
			}
		}
	}
	this->SetWindowRgn(newRgn, true);
	delete [] pBuffer;


	return TRUE;  // Geben Sie TRUE zurück, außer ein Steuerelement soll den Fokus erhalten
}

zqueezy wrote:

int iByteSize = bBitmap.bmWidthBytes * bBitmap.bmHeight * (bBitmap.bmBitsPixel/8);

Mark Salsbery
Microsoft MVP - Visual C++

Cyrilix wrote:

I'm pretty sure this will write the characters to file in ASCII, won't it?

...

for (int i = 0; i < numOrds; ++i)
{
    ordX[i] = 0;
    ordY[i] = 0;
}

ifstream instream("C:\\file.dat", ios::in);
instream.read((char*)ordX, sizeof(int) * numOrds);
instream.read((char*)ordY, sizeof(int) * numOrds);
instream.close();

Mark Salsbery
Microsoft MVP - Visual C++

<br />
//Dialog - prevent changes from being redrawn<br />
this->SetRedraw(FALSE);<br />
<br />
//invert parts of static image onthe Dialog, behind the controls<br />
pDC = this->GetDC();<br />
targetDC.CreateCompatibleDC(pDC);<br />
pOldTargetBmp = targetDC.SelectObject(&m_BmpTarget);<br />
targetDC.PatBlt(X,Y,iWidth,iHeight,DSTINVERT);<br />
targetDC.SelectObject(pOldTargetBmp);<br />
targetDC.DeleteDC();<br />
ReleaseDC(pDC);<br />
m_DialogStaticImage.SetBitmap(HBITMAP(m_BmpTarget));<br />
<br />
//redraw all controls to put them into foreground<br />
m_staticText.RedrawWindow(NULL,NULL,RDW_UPDATENOW);<br />
m_editBox.RedrawWindow(NULL,NULL,RDW_FRAME+RDW_INVALIDATE+RDW_UPDATENOW);<br />
.<br />
. about 15 controls<br />
.<br />
<br />
//Dialog - allow changes to be redrawn<br />
this->SetRedraw(TRUE);<br />
<br />
//no need to erase background since SetBitmap covered everything up<br />
this->Invalidate(FALSE);<br />
<br />
//show updated Dialog<br />
this->UpdateWindow();<br />

abiemann wrote:

I was surprised that it would still flicker; I was hoping that all the graphics operations were done in memory, then simply shown when UpdateWindow was called - thus avoiding flicker.

Mark Salsbery
Microsoft MVP - Visual C++

abiemann wrote:

//no need to erase background since SetBitmap covered everything up
this->Invalidate(FALSE);

abiemann wrote:

no I haven't touched the OnEraseBkgnd()...

this->Invalidate(TRUE);<br />
this->UpdateWindow();