Create Bitmap File（Win32）

Create Bitmap File（Win32）

void SaveBitmap(HBITMAP hResult, wstring strBmpFile)
{
	BITMAP bmp = {0};
	GetObject(hResult, sizeof(BITMAP), &bmp);

	BITMAPINFO bmpInfo = {0};
	bmpInfo.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
	bmpInfo.bmiHeader.biWidth = bmp.bmWidth;
	bmpInfo.bmiHeader.biHeight = bmp.bmHeight;
	bmpInfo.bmiHeader.biPlanes = 1;
	bmpInfo.bmiHeader.biBitCount = bmp.bmBitsPixel;
	bmpInfo.bmiHeader.biCompression = BI_RGB;
	bmpInfo.bmiHeader.biSizeImage = 0;
	bmpInfo.bmiHeader.biXPelsPerMeter = 0;
	bmpInfo.bmiHeader.biYPelsPerMeter = 0;
	bmpInfo.bmiHeader.biClrUsed = 0;
	bmpInfo.bmiHeader.biClrImportant = 0;

	BITMAPFILEHEADER bmpFileHead = {0};
	bmpFileHead.bfType = 0x4D42;
	bmpFileHead.bfSize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + bmp.bmWidthBytes * bmp.bmHeight;
	bmpFileHead.bfReserved1 = 0;
	bmpFileHead.bfReserved2 = 0;
	bmpFileHead.bfOffBits = (DWORD)sizeof(BITMAPFILEHEADER) + (DWORD)sizeof(BITMAPINFOHEADER);

	DWORD dwWritten = 0;
	HANDLE fh = CreateFile(strBmpFile.c_str(), GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN, NULL);
	WriteFile(fh, (LPSTR)&bmpFileHead, sizeof(BITMAPFILEHEADER), &dwWritten, NULL);
	WriteFile(fh, (char *)&(bmpInfo.bmiHeader), sizeof(BITMAPINFOHEADER), &dwWritten, NULL);
	WriteFile(fh, (char *)bmp.bmBits, bmp.bmWidthBytes * bmp.bmHeight, &dwWritten, NULL);
	FlushFileBuffers(fh);

	CloseHandle(fh);
}

void SvaeBitmap2(HBITMAP hResult, wstring strBmpFile)
{
	BITMAP bmp = {0};
	GetObject(hResult, sizeof(BITMAP), &bmp);
	int iPalletSize = (bmp.bmPlanes * bmp.bmBitsPixel < 24)? (1 << bmp.bmPlanes * bmp.bmBitsPixel) : 0;

	BITMAPFILEHEADER bmpFileHeader = {0};
	bmpFileHeader.bfType = 0x4D42;
	bmpFileHeader.bfSize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD) * iPalletSize + bmp.bmWidthBytes * bmp.bmHeight;
	bmpFileHeader.bfReserved1 = 0;
	bmpFileHeader.bfReserved2 = 0;
	bmpFileHeader.bfOffBits = (DWORD)sizeof(BITMAPFILEHEADER) + (DWORD)sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD) * iPalletSize;

	PBITMAPINFO pbmpInfo = (PBITMAPINFO)LocalAlloc(LPTR, sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD) * iPalletSize);
	pbmpInfo->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
	pbmpInfo->bmiHeader.biWidth = bmp.bmWidth;
	pbmpInfo->bmiHeader.biHeight = bmp.bmHeight;
	pbmpInfo->bmiHeader.biSizeImage = 0;
	pbmpInfo->bmiHeader.biCompression = BI_RGB;
	pbmpInfo->bmiHeader.biPlanes = bmp.bmPlanes;
	pbmpInfo->bmiHeader.biBitCount = bmp.bmBitsPixel;
	pbmpInfo->bmiHeader.biXPelsPerMeter = 0;
	pbmpInfo->bmiHeader.biYPelsPerMeter = 0;
	pbmpInfo->bmiHeader.biClrUsed = 0;
	pbmpInfo->bmiHeader.biClrImportant = 0;

	LPRGBQUAD pPallet = &pbmpInfo->bmiColors[0];
	for(int i = 0; i < iPalletSize; i++)
	{
		pPallet[i].rgbBlue = pPallet[i].rgbGreen = pPallet[i].rgbRed = static_cast<BYTE>(i * 255 / (iPalletSize - 1));
		pPallet[i].rgbReserved = 0;
	}

	DWORD dwWritten = 0;
	HANDLE fh = CreateFile(strBmpFile.c_str(), GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN, NULL);
	WriteFile(fh, (LPVOID)&bmpFileHeader, sizeof(BITMAPFILEHEADER), &dwWritten, NULL);
	WriteFile(fh, (LPVOID)pbmpInfo, sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD) * iPalletSize, &dwWritten, NULL);
	WriteFile(fh, (LPVOID)bmp.bmBits, bmp.bmWidthBytes * bmp.bmHeight, &dwWritten, NULL);
	FlushFileBuffers(fh);
	CloseHandle(fh);
	LocalFree((HGLOBAL)pbmpInfo);
}