How to convert int* (bgr image) from c++ to unity3d texture image? - opencv

Question

I have a bgr image uchar format from opencv c++.
the function is like int* texture(int* data, int width, int height); the function processes the image in c++ end and returns the pointer to the data. How do I convert this data in Unity to texture. basically make this data available to be put as a texture. I dont want to write it to a file. Please help.
Code snippet (I am using dlls) :::
public static WebCamTexture webCamTexture;
private Color32[] data;
private int[] imageData;
private int[] imdat;
void Start () {
....
data = new Color32[webCamTexture.width * webCamTexture.height];
imageData = new int[data.Length * 3];
}
void Update()
{
webCamTexture.GetPixels32(data);
// Convert the Color32[] in int* and emit it in bgr format
for (int i = 0; i < data.Length; ++i)
{
imageData[i * 3] = (int)data[i].b;
imageData[i * 3 + 1] = (int)data[i].g;
imageData[i * 3 + 2] = (int)data[i].r;
}
//this is the function called from dll
imdat = texture(imageData, int width, int height);
}
And the DLL end looks like ::
char *tmp;
int* texture(int* imageData ,int width ,int height)
{
int n = w * h * 3;
tmp = new char[n];
//ImageData inverted here and then passed onto tmp 3 channels image
for (int i = 0; i < (w*3); ++i)
for (int j = 0; j < h; ++j)
tmp[i + j * (w*3)] = (char)imageData[i + (h - j - 1) * (w*3)];
return (int)tmp;
}

Answer 1

I'm not sure what format texture you have is, but if you can convert it into byte[] you can use Texture2D.LoadImage(byte[]) to turn in into working texture.

Answer 2

You should be able to achieve what to want with BitConverter.GetBytes() and Texture2D.LoadImage(). Make sure you take special note of the image format restrictions in the Unity manual page there.
Not sure how your binding between your C++land and C#land code but you should be able to do something a little like this:
/* iImportedTexture = [Your c++ function here]; */
byte[] bImportedTexture = BitConverter.GetBytes(iImportedTexture);
Texture2D importedTexture = Texture2D.LoadImage(bImportedTexture);