public static IntPtr LoadFromMemory(byte[] sprData, FI_FORMAT type)
{
//读图像数据并储存在非托管内存
IntPtr sprPoint = Marshal.AllocHGlobal(sprData.Length);
Marshal.Copy(sprData, 0, sprPoint, sprData.Length);
//从非托管内存提交给FreeImage
int sprStream = FI.OpenMemory((int)sprPoint, sprData.Length);
IntPtr dib = FI.LoadFromMemory(type, sprStream, 0);
//释放
Marshal.FreeHGlobal(sprPoint);
FI.CloseMemory(sprStream);
return(dib);
}
public static bool SaveToMemory(IntPtr dib, ref byte[] sprData, FI_FORMAT type)
{
//保存图像到流
int newSprStream = FI.OpenMemory(0, 0);
if (FI.SaveToMemory(type, dib, newSprStream, 0) == false)
{
return(false);
}
//将非托管数据重新转为托管类型
int newSprPoint = 0;
int newLen = 0;
FI.AcquireMemory(newSprStream, ref newSprPoint, ref newLen);
sprData = new byte[newLen];
Marshal.Copy((IntPtr)newSprPoint, sprData, 0, newLen);
//释放
FI.CloseMemory(newSprStream);
return(true);
}