// Bitmaps einlesen und Paletten initialisieren
bool CBildObjekt :: InitDIB (const char *pcFullName)
{
int fh; /* Dateihandle (evtl. komprimiertes File) */
OFSTRUCT of; /* Dateistruktur */
HPALETTE hPalCurrent; /* PaletteStruct */
HBITMAP hDIBCurrent; /* DIB */
HBITMAP hBMCurrent; /* DDB */
// alte DIB freigeben
FreeDIB ();
// Datei eröffnen, Speicherplatz anlegen
fh = OpenFile (pcFullName, (OFSTRUCT *)&of, OF_READ);
if (fh < 0) return false;
hDIBCurrent = ReadDIBitmapInfo (fh); // Farbtabelle lesen
// Gültigkeit der DIB-Datei prüfen
if (hDIBCurrent == NULL) {
_lclose (fh);
return false;
}
m_hDIB = hDIBCurrent; // im Objekt merken
// PaletteSetup
hPalCurrent = CreateDIBPalette (); // Palette bilden
if (hPalCurrent == NULL) {
_lclose (fh);
return false;
}
m_hPal = hPalCurrent;
// DIB einlesen
hDIBCurrent = ReadDIB (fh);
if (!hDIBCurrent) {
_lclose (fh);
return false;
}
m_hDIB = hDIBCurrent;
_lclose (fh);
// DDB bilden
hBMCurrent = DIBToBitmap();
if (!hBMCurrent)
return false;
m_hDDB = hBMCurrent;
return true;
}
QPixmap* QTwainInterface::convertToPixmap(CDIB* pDib)//,const unsigned int nWidth,const unsigned int nHeight)
{
if (!pDib)
return 0;
unsigned int nUseWidth;
unsigned int nUseHeight;
// if (nUseWidth == 0)
nUseWidth = pDib->Width();
// if (nUseHeight == 0)
nUseHeight = pDib->Height();
//QPixmap* retval = new QPixmap(nUseWidth, nUseHeight);
HANDLE hdib=pDib->DIBHandle();
HPALETTE pepe =CreateDIBPalette(hdib);
HBITMAP ima =DIBToBitmap(hdib,pepe);
QPixmap* retval2= new QPixmap(QPixmap::fromWinHBITMAP ( ima,QPixmap::NoAlpha));
//return retval2;
//HDC hehe;
/*pDib->BitBlt(hehe,
0, 0,
nUseWidth, nUseHeight,
0, 0);
QPixmap buffer(400, 200);
...
bitBlt(&buffer, 0, 0, src, 0, 0, 400, 200);
...
QPainter p(this);
p.drawPixmap(0, 0, buffer);
//HBITMAP ima =pDib->DIBToDDB(pdib);
//QPixmap* retval2= new QPixmap(retval->fromWinHBITMAP ( ima,QPixmap::NoAlpha));
*/
return retval2;
} // !convertToPixmap()
HDIB ChangeDIBFormat(HDIB hDIB, WORD wBitCount, DWORD dwCompression)
{
HDC hDC; // Handle to DC
HBITMAP hBitmap; // Handle to bitmap
BITMAP Bitmap; // BITMAP data structure
BITMAPINFOHEADER bi; // Bitmap info header
LPBITMAPINFOHEADER lpbi; // Pointer to bitmap info
HDIB hNewDIB = NULL; // Handle to new DIB
HPALETTE hPal, hOldPal; // Handle to palette, prev pal
WORD DIBBPP, NewBPP; // DIB bits per pixel, new bpp
DWORD DIBComp, NewComp;// DIB compression, new compression
// Check for a valid DIB handle
if (!hDIB)
return NULL;
// Get the old DIB's bits per pixel and compression format
lpbi = (LPBITMAPINFOHEADER)GlobalLock(hDIB);
DIBBPP = ((LPBITMAPINFOHEADER)lpbi)->biBitCount;
DIBComp = ((LPBITMAPINFOHEADER)lpbi)->biCompression;
GlobalUnlock(hDIB);
// Validate wBitCount and dwCompression
// They must match correctly (i.e., BI_RLE4 and 4 BPP or
// BI_RLE8 and 8BPP, etc.) or we return failure
if (wBitCount == 0)
{
NewBPP = DIBBPP;
if ((dwCompression == BI_RLE4 && NewBPP == 4) ||
(dwCompression == BI_RLE8 && NewBPP == 8) ||
(dwCompression == BI_RGB))
NewComp = dwCompression;
else
return NULL;
}
else if (wBitCount == 1 && dwCompression == BI_RGB)
{
NewBPP = wBitCount;
NewComp = BI_RGB;
}
else if (wBitCount == 4)
{
NewBPP = wBitCount;
if (dwCompression == BI_RGB || dwCompression == BI_RLE4)
NewComp = dwCompression;
else
return NULL;
}
else if (wBitCount == 8)
{
NewBPP = wBitCount;
if (dwCompression == BI_RGB || dwCompression == BI_RLE8)
NewComp = dwCompression;
else
return NULL;
}
else if (wBitCount == 24 && dwCompression == BI_RGB)
{
NewBPP = wBitCount;
NewComp = BI_RGB;
}
else
return NULL;
// Save the old DIB's palette
hPal = CreateDIBPalette(hDIB);
if (!hPal)
return NULL;
// Convert old DIB to a bitmap
hBitmap = DIBToBitmap(hDIB, hPal);
if (!hBitmap)
{
DeleteObject(hPal);
return NULL;
}
// Get info about the bitmap
GetObject(hBitmap, sizeof(BITMAP), (LPSTR)&Bitmap);
// Fill in the BITMAPINFOHEADER appropriately
bi.biSize = sizeof(BITMAPINFOHEADER);
bi.biWidth = Bitmap.bmWidth;
bi.biHeight = Bitmap.bmHeight;
bi.biPlanes = 1;
bi.biBitCount = NewBPP;
bi.biCompression = NewComp;
bi.biSizeImage = 0;
bi.biXPelsPerMeter = 0;
bi.biYPelsPerMeter = 0;
bi.biClrUsed = 0;
bi.biClrImportant = 0;
// Go allocate room for the new DIB
hNewDIB = AllocRoomForDIB(bi, hBitmap);
if (!hNewDIB)
return NULL;
// Get a pointer to the new DIB
lpbi = (LPBITMAPINFOHEADER)GlobalLock(hNewDIB);
// Get a DC and select/realize our palette in it
hDC = GetDC(NULL);
hOldPal = SelectPalette(hDC, hPal, FALSE);
RealizePalette(hDC);
// Call GetDIBits and get the new DIB bits
if (!GetDIBits(hDC, hBitmap, 0, (UINT) lpbi->biHeight,
(LPSTR)lpbi + (WORD)lpbi->biSize + PaletteSize((LPSTR)lpbi),
(LPBITMAPINFO)lpbi, DIB_RGB_COLORS))
{
GlobalUnlock(hNewDIB);
GlobalFree(hNewDIB);
hNewDIB = NULL;
}
// Clean up and return
SelectPalette(hDC, hOldPal, TRUE);
RealizePalette(hDC);
ReleaseDC(NULL, hDC);
// Unlock the new DIB's memory block
if (hNewDIB)
GlobalUnlock(hNewDIB);
DeleteObject(hBitmap);
DeleteObject(hPal);
return hNewDIB;
}
