Buffer.BlockCopy? (memcpy equiv?)

[Insider1984]

We are creating a C# app that needs to copy an image (or rather a (pointer + image size) to another memory location. Currently we are using IntPtr or byte* to do this in a for loop for each pixel. Apparently this is really slow compared to the old memcpy of the C++ C world.

A quick search finds that Buffer.BlockCopy seems to be the same style of function as memCpy. The problem is that it takes an Array not our current IntPtr.

Any advice on a faster approach?

//lock bits

            byte* outPtr = (byte*)outData.Scan0;
            byte* inPtr = (byte*)inputImagePointer;
            //Buffer.BlockCopy(inPtr, 0, outPtr, 0, (width * height));
            for (int i = 0; i < (width * height); i++)
            {
                *outPtr = *inPtr;
                outPtr++;
                inPtr++;
            }
//unlock bits

=====================
Insider
4 year 'on the fly' programmer
C, C++, C#, MFC, Basic, Java ASP.NET

 

[chiph]

Look into using the unsafe keyword, and then you can do stuff like this.

Chip H.


____________________________________________________________________
If you want to get the best response to a question, please read FAQ222-2244 first

 

[Insider1984]

we are currently unsafe but the issue that I'm unfamiliar with is the Buffer.BlockCopy needs Array and I'm using IntPointers.

This works but I need a faster approach.

Thanks for your input.

=====================
Insider
4 year 'on the fly' programmer
C, C++, C#, MFC, Basic, Java ASP.NET