Edit Question - KnowledgeHub

Title Body

I have several (~2GB) raw 24bpp RGB files on HDD. Now I want to retrieve a portion of it and scale it to the desired size. (The only scales allowed are 1, 1/2, 1/4, 1/8, ..., 1/256) So I'm currently reading every line from the rectangle of interest into an array, which leaves me with a bitmap which has correct height but wrong width. As the next step I'm creating a Bitmap from the newly created array. This is done with by using a pointer so there is no copying of data involved. Next I'm calling GetThumbnailImage on the Bitmap, which creates a new bitmap with the correct dimensions. Now I want to return the raw pixel data (as a byte array) of the newly created bitmap. But to achieve that I'm currently copying the data using LockBits into a new array. So my question is: Is there a way to get the pixel data from a Bitmap into a byte array without copying it? Something like: var bitmapData = scaledBitmap.LockBits(...) byte[] rawBitmapData = (byte[])bitmapData.Scan0.ToPointer() scaledBitmap.UnlockBits(bitmapData) return rawBitmapData I'm well aware that this doesn't work, it is just an example to what I basically want to achieve.

Tags (comma-separated) Cancel