界面——C++_MFC从入门到放弃（四）——CImage数据结构的复制

bool CImageCopy(const CImage &srcImage, CImage &destImage)
{
	int i, j;//循环变量  
	if (srcImage.IsNull())
		return FALSE;
	//源图像参数  
	BYTE* srcPtr = (BYTE*)srcImage.GetBits();
	int srcBitsCount = srcImage.GetBPP();
	int srcWidth = srcImage.GetWidth();
	int srcHeight = srcImage.GetHeight();
	int srcPitch = srcImage.GetPitch();
	//销毁原有图像  
	if (!destImage.IsNull())
	{
		destImage.Destroy();
	}
	//创建新图像  
	if (srcBitsCount == 32)   //支持alpha通道  
	{
		destImage.Create(srcWidth, srcHeight, srcBitsCount, 1);
	}
	else
	{
		destImage.Create(srcWidth, srcHeight, srcBitsCount, 0);
	}
	//加载调色板  
	if (srcBitsCount <= 8 && srcImage.IsIndexed())//需要调色板  
	{
		RGBQUAD pal[256];
		int nColors = srcImage.GetMaxColorTableEntries();
		if (nColors>0)
		{
			srcImage.GetColorTable(0, nColors, pal);
			destImage.SetColorTable(0, nColors, pal);//复制调色板程序  
		}
	}
	//目标图像参数  
	BYTE *destPtr = (BYTE*)destImage.GetBits();
	int destPitch = destImage.GetPitch();
	//复制图像数据  
	for (i = 0; i