Bitmap bmp01;
int BmpWidth = bmp01.Width;
int BmpHeight = bmp01.Height;
PixelFormat BmpPixelFormat = bmp01.PixelFormat;
byte* RBuff = (byte*)Marshal.AllocHGlobal(177600);
byte* GBuff = (byte*)Marshal.AllocHGlobal(177600);
byte* BBuff = (byte*)Marshal.AllocHGlobal(177600);
BitmapData bmpData = bmp01.LockBits(new Rectangle(0, 0, BmpWidth, BmpHeight), ImageLockMode.WriteOnly, BmpPixelFormat);
int stride = bmpData.Stride; // 扫描线的宽度
int offset = stride - BmpWidth*3; // 显示宽度与扫描线宽度的间隙
byte* pSrc = (byte*)bmpData.Scan0; // 获取bmpData的内存起始位置
int posScan = 0, posReal = 0; // 分别设置两个位置指针,指向源数组和目标数组
for (int x = 0; x < BmpHeight; x++)
{
//// 下面的循环节是模拟行扫描
for (int y = 0; y < BmpWidth; y++)
{
RBuff[posScan] = pSrc[posReal];
GBuff[posScan] = pSrc[posReal+1];
BBuff[posScan] = pSrc[posReal+2];
posScan++;
posReal += 3;
}
posReal += offset; //行扫描结束,要将目标位置指针移过那段“间隙”
}
bmp01.UnlockBits(bmpData);