146 lines
4.3 KiB
C++
146 lines
4.3 KiB
C++
//---------------------------------------------------------------------------
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// blackrect.cpp - special code for debugging the infamous black rect
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// problem. not compiled; keep around until we fix this
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// problem.
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//---------------------------------------------------------------------------
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HRESULT CRenderObj::CreateBitmapFromData(HDC hdc, int iDibOffset, OUT HBITMAP *phBitmap)
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{
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RESOURCE HDC hdcTemp = NULL;
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RESOURCE HBITMAP hBitmap = NULL;
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HRESULT hr = S_OK;
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BYTE *pDibData = (BYTE *)(_pbThemeData + iDibOffset);
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BITMAPINFOHEADER *pBitmapHdr;
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pBitmapHdr = (BITMAPINFOHEADER *)pDibData;
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BOOL fAlphaChannel;
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fAlphaChannel = (pBitmapHdr->biBitCount == 32);
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if (! hdc)
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{
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hdcTemp = GetWindowDC(NULL);
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if (! hdcTemp)
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{
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Log(LOG_ERROR, L"GetWindowDC() failed in CreateBitmapFromData");
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hr = MakeErrorLast();
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goto exit;
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}
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hdc = hdcTemp;
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}
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//---- create the actual bitmap ----
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//---- if using alpha channel, we must use a DIB ----
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if (fAlphaChannel)
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{
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void *pv;
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hBitmap = CreateDIBSection(hdc, (BITMAPINFO *)pBitmapHdr, DIB_RGB_COLORS,
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&pv, NULL, 0);
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//Log(LOG_TM, L"CreateDIBSection() returned hBitmap=0x%x, lasterr=0x%x", hBitmap, GetLastError());
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}
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else
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{
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hBitmap = CreateCompatibleBitmap(hdc, pBitmapHdr->biWidth, pBitmapHdr->biHeight);
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//Log(LOG_TM, L"CreateCompatibleBitmap() returned hBitmap=0x%x, lasterr=0x%x", hBitmap, GetLastError());
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}
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if (! hBitmap)
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{
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hr = MakeErrorLast();
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goto exit;
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}
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int iSetVal;
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#if 1
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//---- SetDIBits() can take unaligned data, right? ----
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iSetVal = SetDIBits(hdc, hBitmap, 0, pBitmapHdr->biHeight, DIBDATA(pBitmapHdr), (BITMAPINFO *)pBitmapHdr,
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DIB_RGB_COLORS);
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#else
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//---- ensure all is DWORD aligned for SetDIBits() call ----
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BITMAPINFOHEADER AlignedHdr;
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int iBytesPerPixel, iRawBytes, iBytesPerRow, iTotalBytes;
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BYTE *pbAlignedBits;
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iBytesPerPixel = pBitmapHdr->biBitCount/8; // bitcount will be 24 or 32
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iRawBytes = pBitmapHdr->biWidth * iBytesPerPixel;
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iBytesPerRow = 4*((iRawBytes+3)/4);
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iTotalBytes = pBitmapHdr->biHeight * iBytesPerRow;
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pbAlignedBits = new BYTE[iTotalBytes];
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if (! pbAlignedBits)
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{
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hr = E_OUTOFMEMORY;
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goto exit;
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}
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memcpy(pbAlignedBits, DIBDATA(pBitmapHdr), iTotalBytes);
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AlignedHdr = *pBitmapHdr;
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Log(LOG_TM, L"Calling SetDIBits() with BITMAPINFOHEADER and bits DWORD aligned");
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iSetVal = SetDIBits(hdc, hBitmap, 0, AlignedHdr.biHeight, pbAlignedBits, (BITMAPINFO *)&AlignedHdr,
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DIB_RGB_COLORS);
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delete [] pbAlignedBits;
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#endif
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//Log(LOG_TM, L"SetDIBits() returned iSetVal=%d, lasterr=0x%x", iSetVal, GetLastError());
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#if 0 // #ifdef LOGGING
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if ((pBitmapHdr->biWidth == 16) && (pBitmapHdr->biHeight == 16)) // problem bitmap we are debugging
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{
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const int len = 3*16*16;
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DWORD pbNewBits[16*16]; // aligned, quadwords (when we only use 3 bytes) to make GetDIBits() happy
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BITMAPINFOHEADER NewHdr = *pBitmapHdr;
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int iGetVal;
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iGetVal = GetDIBits(hdc, hBitmap, 0, pBitmapHdr->biHeight, pbNewBits, (LPBITMAPINFO)&NewHdr, DIB_RGB_COLORS);
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Log(LOG_TM, L"GetDIBits() returned iGetVal=%d, lasterr=0x%x", iGetVal, GetLastError());
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if (iGetVal)
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{
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BYTE *bOrig = DIBDATA(pBitmapHdr);
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BYTE *bNew = (BYTE *)pbNewBits;
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for (int b=0; b < len; b++)
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{
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if (*bOrig != *bNew)
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{
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Log(LOG_TM, L"old/new bitmap bytes do not match: offset=%d, bOrig=0x%x, bNew=0x%x",
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b, bOrig, bNew);
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DEBUG_BREAK;
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break;
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}
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bOrig++;
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bNew++;
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}
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}
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}
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#endif
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if (! iSetVal)
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{
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hr = MakeErrorLast();
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goto exit;
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}
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*phBitmap = hBitmap;
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exit:
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if (hdcTemp)
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ReleaseDC(NULL, hdcTemp);
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if (FAILED(hr))
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{
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if (hBitmap)
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DeleteObject(hBitmap);
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}
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return hr;
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}
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//---------------------------------------------------------------------------
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