Ich bastle also DIB-Sections und möchte das Ganze dann per StretchBlt darstellen:
<< sämtliche Variablenwerte sind an sich ok..>>

typedef unsigned char T_KACHEL[2500];
struct S_ARCHEAD
{
  int  SizeOfKachel;
  int  XKCount, YKCount;
  char WaterMark;
};
...

HBITMAP CreateBitMap (HWND hwnd, T_KACHEL *K, S_ARCHEAD *aH)
{
  BITMAPINFOHEADER  bi, 
                   *lpbi;
  RGBQUAD          *lpQuad;
  HBITMAP           hBitmap;
  HDC               hDC;
  HANDLE            hDIB;
  int i;

  bi.biSize         = sizeof(BITMAPINFOHEADER);
  bi.biWidth        = aH->XKCount;
  bi.biHeight       = aH->YKCount;
  bi.biPlanes       = 1;
  bi.biBitCount     = 8;
  bi.biCompression  = BI_RGB;
  bi.biSizeImage    = aH->XKCount * aH->YKCount;

  bi.biXPelsPerMeter = 0;
  bi.biYPelsPerMeter = 0;
  bi.biClrUsed       = 0;
  bi.biClrImportant  = 0;

  hDIB = GlobalAlloc (GHND, sizeof (BITMAPINFOHEADER) + 256 * sizeof(RGBQUAD));
  lpbi = (BITMAPINFOHEADER*) GlobalLock ( hDIB );

  *lpbi = bi;

  lpQuad = &((LPBITMAPINFO)lpbi)->bmiColors[0]; 

  for (i = 0; i <= aH->WaterMark; i++)  // Blau bis zur Wassermarke
  {
    lpQuad->rgbRed   = 0 + 5 * i;
    lpQuad->rgbGreen = 0 + 5 * i;
    lpQuad->rgbBlue  = 0x80;
    lpQuad++;
  }

  for (i = aH->WaterMark + 1; i <= 255; i++)  // Braun bis zur Wassermarke
  {
    lpQuad->rgbRed   = 0 + i;
    lpQuad->rgbGreen = 0 + i;
    lpQuad->rgbBlue  = aH->WaterMark;
    lpQuad++;
  }

   hDC = GetDC(hwnd);

      hBitmap = CreateDIBSection(hDC, (LPBITMAPINFO)lpbi, DIB_RGB_COLORS, 
                                 (VOID **) &K, NULL, 0);

   ReleaseDC(hwnd, hDC);
   GlobalUnlock( hDIB );                               
   GlobalFree  ( hDIB );

}

Soviel zum CreateDIBSection()..

hier die (gekürzte Fensterfunktion:

LRESULT CALLBACK C_mygrid::ChildProc(HWND hWnd, UINT message, 
                                      WPARAM wParam, LPARAM lParam)
{
C_mygrid *Sc = (C_mygrid*) GetWindowLong(hWnd, GWL_USERDATA);
  int ScItemX, ScItemY, ScStep;
  T_KACHEL *K;

  PAINTSTRUCT ps;
  HDC hDC, hMemDC;
  BITMAP bm;  
  RECT rect;
  HBRUSH Brush;

  float MapCX, MapCY; 
  int CiRad; 

    switch (message)                  /* handle the messages */
    {
   ...
        case WM_PAINT:    
/* Todo: Mapdaten darstellen */
            ScStep =(int)(Sc->fZoom * (float)50);
            K = &Sc->Felddaten[0];
            GetClientRect(hWnd, &rect);
            for (ScItemX= 0; ScItemX <= Sc->FileHeader.XKCount; ScItemX += 1)
             {
             for (ScItemY = 0; ScItemY <= Sc->FileHeader.YKCount; ScItemY += 1)
                 {
                  K = &Sc->Felddaten[ScItemY * Sc->FileHeader.XKCount + ScItemX];
                  hMemDC = CreateCompatibleDC( hDC );
                  Sc->BitMap = CreateBitMap(hWnd, K, &Sc->FileHeader);

                  GetObject ( Sc->BitMap, sizeof(BITMAP), &bm);
                  SelectObject (hMemDC, Sc->BitMap);

//                  rect.left = (int)  (Sc->fZoom * (50 * Sc->TickX + ScItemX));
//                  rect.top = (int)   (Sc->fZoom * (50 * Sc->TickY + ScItemY));
//                  rect.right = (int) (Sc->fZoom * (50 * Sc->TickX + ScItemX + 1.0));
//                  rect.bottom = (int)(Sc->fZoom * (50 * Sc->TickY + ScItemY + 1.0));

                  SetStretchBltMode (hDC, STRETCH_DELETESCANS);
                  StretchBlt(hDC, rect.left, rect.top, rect.right, rect.bottom,
                              hMemDC, 0, 0, bm.bmWidth, bm.bmHeight, SRCCOPY);
                  DeleteDC( hMemDC );
                  ReleaseDC ( hWnd, hDC );
                  DeleteObject ( Sc->BitMap );                       
                 }
             }

/* Raster Darstellen */
             /* funktioniert - deswegen kommt's hier raus. */
            break;
...
        default:                      /* for messages that we don't deal with */
            return DefWindowProc (hWnd, message, wParam, lParam);
    }

    return 0;

}

So, was ist nun nicht richtig?
Ich gebe zu, dass ich sowas noch nie probiert habe und deswegen relativ wenig Ahnung von DIBSections..

plz hlp!!

cYa && thx
DjR

[ Dieser Beitrag wurde am 04.12.2002 um 21:30 Uhr von DocJunioR editiert. ]

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