1  #include "pch.h"
 2  
 3  #include "BGRATextureView.h"
 4  
 5  #if defined(DEBUG_TEXTURE)
 6  void BGRATextureView::SaveAsBitmap(const char* filename) const
 7  {
 8      wil::unique_hbitmap bitmap{ CreateBitmap(static_cast<int>(pitch), static_cast<int>(height), 1, 32, pixels) };
 9      const HBITMAP hBitmap = bitmap.get();
10      DWORD dwPaletteSize = 0, dwBmBitsSize = 0, dwDIBSize = 0, dwWritten = 0;
11      LPBITMAPINFOHEADER lpBitmapInfo;
12      HANDLE hDib, hPal, hOldPal2 = NULL;
13      HDC hDC = CreateDC(TEXT("DISPLAY"), NULL, NULL, NULL);
14      const int iBits = GetDeviceCaps(hDC, BITSPIXEL) * GetDeviceCaps(hDC, PLANES);
15      DeleteDC(hDC);
16      WORD wBitCount = 24;
17      if (iBits <= 1)
18          wBitCount = 1;
19      else if (iBits <= 4)
20          wBitCount = 4;
21      else if (iBits <= 8)
22          wBitCount = 8;
23  
24      BITMAP Bitmap0;
25      GetObject(hBitmap, sizeof(Bitmap0), (LPSTR)&Bitmap0);
26      BITMAPINFOHEADER bi = {};
27      bi.biSize = sizeof(BITMAPINFOHEADER);
28      bi.biWidth = Bitmap0.bmWidth;
29      bi.biHeight = -Bitmap0.bmHeight;
30      bi.biPlanes = 1;
31      bi.biBitCount = wBitCount;
32      bi.biCompression = BI_RGB;
33      bi.biClrUsed = 256;
34      dwBmBitsSize = ((Bitmap0.bmWidth * wBitCount + 31) & ~31) / 8 * Bitmap0.bmHeight;
35      hDib = GlobalAlloc(GHND, dwBmBitsSize + dwPaletteSize + sizeof(BITMAPINFOHEADER));
36      lpBitmapInfo = (LPBITMAPINFOHEADER)GlobalLock(hDib);
37      *lpBitmapInfo = bi;
38  
39      hPal = GetStockObject(DEFAULT_PALETTE);
40      if (hPal)
41      {
42          hDC = GetDC(NULL);
43          hOldPal2 = SelectPalette(hDC, (HPALETTE)hPal, FALSE);
44          RealizePalette(hDC);
45      }
46  
47      GetDIBits(hDC, hBitmap, 0, (UINT)Bitmap0.bmHeight, (LPSTR)lpBitmapInfo + sizeof(BITMAPINFOHEADER) + dwPaletteSize, (BITMAPINFO*)lpBitmapInfo, DIB_RGB_COLORS);
48  
49      if (hOldPal2)
50      {
51          SelectPalette(hDC, (HPALETTE)hOldPal2, TRUE);
52          RealizePalette(hDC);
53          ReleaseDC(NULL, hDC);
54      }
55  
56      wil::unique_handle fh{ CreateFileA(filename, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN, NULL) };
57  
58      if (!fh)
59          return;
60  
61      BITMAPFILEHEADER bitmapFileHeader = {};
62      bitmapFileHeader.bfType = 0x4D42; // "BM"
63      dwDIBSize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + dwPaletteSize + dwBmBitsSize;
64      bitmapFileHeader.bfSize = dwDIBSize;
65      bitmapFileHeader.bfOffBits = (DWORD)sizeof(BITMAPFILEHEADER) + (DWORD)sizeof(BITMAPINFOHEADER) + dwPaletteSize;
66  
67      WriteFile(fh.get(), (LPSTR)&bitmapFileHeader, sizeof(BITMAPFILEHEADER), &dwWritten, NULL);
68  
69      WriteFile(fh.get(), (LPSTR)lpBitmapInfo, dwDIBSize, &dwWritten, NULL);
70      GlobalUnlock(hDib);
71      GlobalFree(hDib);
72  }
73  #endif