正在尝试为多种BPP格式创建“保存位图”功能

我有一个C++MFC项目，我需要翻转一个可以是不同格式的位图，然后保存它。我在创建一个以多种格式保存位图的函数时遇到了问题。

当我试图启用ATL（活动模板库）来使用CImage中的函数时，我添加的#includes破坏了项目。在尝试了几种不同的东西之后，我放弃了。

由于我不能使用CImage，我查看了Microsoft保存位图图像的示例。问题是，他们的例子不适用于除24位位图之外的任何图像。

以下是MSDN中的函数。

PBITMAPINFO BitmapTools::CreateBitmapInfoStruct(HBITMAP hBmp)
{ 
BITMAP bmp; 
PBITMAPINFO pbmi; 
WORD    cClrBits; 
// Retrieve the bitmap color format, width, and height.  
if (!GetObjectW(hBmp, sizeof(BITMAP), (LPSTR)&bmp)) 
    return pbmi;
// errhandler("GetObject", hwnd); 
// Convert the color format to a count of bits.  
cClrBits = (WORD)(bmp.bmPlanes * bmp.bmBitsPixel); 
if (cClrBits == 1) 
    cClrBits = 1; 
else if (cClrBits <= 4) 
    cClrBits = 4; 
else if (cClrBits <= 8) 
    cClrBits = 8; 
else if (cClrBits <= 16) 
    cClrBits = 16; 
else if (cClrBits <= 24) 
    cClrBits = 24; 
else cClrBits = 32; 
// Allocate memory for the BITMAPINFO structure. (This structure  
// contains a BITMAPINFOHEADER structure and an array of RGBQUAD  
// data structures.)  
if (cClrBits < 24)
{
    pbmi = (PBITMAPINFO) LocalAlloc(LPTR, 
        sizeof(BITMAPINFOHEADER) + 
        sizeof(RGBQUAD) * (1<< cClrBits)); 
    // There is no RGBQUAD array for these formats: 24-bit-per-pixel or 32-bit-per-pixel 
}
else
{
    pbmi = (PBITMAPINFO) LocalAlloc(LPTR, sizeof(BITMAPINFOHEADER)); 
}
// Initialize the fields in the BITMAPINFO structure.  
pbmi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER); 
pbmi->bmiHeader.biWidth = bmp.bmWidth; 
pbmi->bmiHeader.biHeight = bmp.bmHeight; 
pbmi->bmiHeader.biPlanes = bmp.bmPlanes; 
pbmi->bmiHeader.biBitCount = bmp.bmBitsPixel; 
if (cClrBits < 24) 
    pbmi->bmiHeader.biClrUsed = (1<<cClrBits); 
// If the bitmap is not compressed, set the BI_RGB flag.  
pbmi->bmiHeader.biCompression = BI_RGB; 
// Compute the number of bytes in the array of color  
// indices and store the result in biSizeImage.  
// The width must be DWORD aligned unless the bitmap is 
// RLE compressed. 
pbmi->bmiHeader.biSizeImage = ((pbmi->bmiHeader.biWidth * cClrBits +31) & ~31) /8
    * pbmi->bmiHeader.biHeight; 
// Set biClrImportant to 0, indicating that all of the  
// device colors are important.  
pbmi->bmiHeader.biClrImportant = 0; 
return pbmi; 
} 

创建文件的功能：

void BitmapTools::CreateBMPFile(LPTSTR pszFile, PBITMAPINFO pbi, HBITMAP hBMP, HDC hDC) 
{ 
HANDLE hf;                  // file handle  
BITMAPFILEHEADER hdr;       // bitmap file-header  
PBITMAPINFOHEADER pbih;     // bitmap info-header  
LPBYTE lpBits;              // memory pointer  
DWORD dwTotal;              // total count of bytes  
DWORD cb;                   // incremental count of bytes  
BYTE *hp;                   // byte pointer  
DWORD dwTmp; 
pbih = (PBITMAPINFOHEADER) pbi; 
lpBits = (LPBYTE) GlobalAlloc(GMEM_FIXED, pbih->biSizeImage);
if (!lpBits) 
    return;//errhandler("GlobalAlloc", hwnd); 

// Retrieve the color table (RGBQUAD array) and the bits  
// (array of palette indices) from the DIB.  
if (!GetDIBits(hDC, hBMP, 0, (WORD) pbih->biHeight, lpBits, pbi, 
    DIB_RGB_COLORS)) 
{
    return;//errhandler("GetDIBits", hwnd); 
}
// Create the .BMP file.  
hf = CreateFile(pszFile, 
    GENERIC_READ | GENERIC_WRITE, 
    (DWORD) 0, 
    NULL, 
    CREATE_ALWAYS, 
    FILE_ATTRIBUTE_NORMAL, 
    (HANDLE) NULL); 
if (hf == INVALID_HANDLE_VALUE) 
    return;//errhandler("CreateFile", hwnd); 
hdr.bfType = 0x4d42;        // 0x42 = "B" 0x4d = "M"  
// Compute the size of the entire file.  
hdr.bfSize = (DWORD) (sizeof(BITMAPFILEHEADER) + 
    pbih->biSize + pbih->biClrUsed 
    * sizeof(RGBQUAD) + pbih->biSizeImage); 
hdr.bfReserved1 = 0; 
hdr.bfReserved2 = 0; 
// Compute the offset to the array of color indices.  
hdr.bfOffBits = (DWORD) sizeof(BITMAPFILEHEADER) + 
    pbih->biSize + pbih->biClrUsed 
    * sizeof (RGBQUAD); 
// Copy the BITMAPFILEHEADER into the .BMP file.  
if (!WriteFile(hf, (LPVOID) &hdr, sizeof(BITMAPFILEHEADER), 
    (LPDWORD) &dwTmp,  NULL)) 
{
    return;//errhandler("WriteFile", hwnd); 
}
// Copy the BITMAPINFOHEADER and RGBQUAD array into the file.  
if (!WriteFile(hf, (LPVOID) pbih, sizeof(BITMAPINFOHEADER) 
    + pbih->biClrUsed * sizeof (RGBQUAD), 
    (LPDWORD) &dwTmp, ( NULL)))
    return;//errhandler("WriteFile", hwnd); 
// Copy the array of color indices into the .BMP file.  
dwTotal = cb = pbih->biSizeImage; 
hp = lpBits; 
if (!WriteFile(hf, (LPSTR) hp, (int) cb, (LPDWORD) &dwTmp,NULL)) 
    return;// errhandler("WriteFile", hwnd); 
// Close the .BMP file.  
if (!CloseHandle(hf)) 
    return;// errhandler("CloseHandle", hwnd); 
// Free memory.  
GlobalFree((HGLOBAL)lpBits);
}

由于某种原因，当有调色板时，最后一个函数不起作用。如果有人有任何修改技巧，我会非常感激。

谢谢，-HL-

Edited：基本上，第一个函数从加载的位图中获取并存储BitmapInfo。以下是我的H文件中声明的函数。为了简洁起见，我不会在.cpp文件中发布所有已经正常工作的方法。

class BitmapTools : public CBitmap
{
public:
// PaddedWidth = ((Width * (BitsPerPixel / 8)) + 3) & (~3)
// ScanPadding = PaddedWidth - (Width * ( BitsPerPixel / 8 ));
HBITMAP H_Bitmap;   
PBITMAPINFO PBMI;
// If the color depth is 8 bits or lower there will be a color palette/table. 
RGBQUAD colortable;
PBITMAPINFO CreateBitmapInfoStruct(HBITMAP hBmp);
void CreateBMPFile(LPTSTR pszFile, PBITMAPINFO pbi, HBITMAP hBMP, HDC hDC);
bool LoadAttachBitmap(LPCTSTR bmpfile);
void GetWidthAndHeight (int* pw, int* ph) const;
void Invert (BOOL bLateral);
void InvertAndFlip();
};

用于调用方法：

BitmapTools tools;
if (!tools.LoadAttachBitmap("test.bmp"))
{
    return;
}
tools.InvertAndFlip();
tools.PBMI = tools.CreateBitmapInfoStruct(tools.H_Bitmap);
HDC dc = CreateCompatibleDC(NULL); 
tools.CreateBMPFile("temp.bmp", tools.PBMI, tools.H_Bitmap, dc);
return;