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#1 Posted : Monday, March 3, 2014 4:37:33 AM(UTC)


Groups: Manager, Tech Support
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The Leadtools.RasterImage class has a constructor that allows you to create a bitmap from pixel data stored in a byte array if the data in the array meets certain conditions, which are:
1. It must be of known width and height.
2. It must be padded to multiples of 4 bytes per line. The sample below achieves this by using a bitmap width of 800 (in itself multiple of 4).
3. The byte order must be known (assumed BGR in this sample).
The code creates a dummy red-filled bitmap the slow way (looping through all pixels), but is only done to demonstrate where the data came from.

const int w = 800, h = 600;
byte[] b = new byte[w * h * 3]; //3 bytes per pixel
byte B = 0, G = 0, R = 255; //fill red with 0xff and others with zero
for (int i = 0; i < b.Length; i+=3) //fill entire bitmap with red
   b[i] = B;
   b[i + 1] = G;
   b[i + 2] = R;
RasterImage redImage = new RasterImage(RasterMemoryFlags.User, w, h, 24, RasterByteOrder.Bgr, RasterViewPerspective.TopLeft, null, b, b.Length);
_codecs.Save(redImage, "d:\RedImage.png", RasterImageFormat.Png, 24);

Amin Dodin

Senior Support Engineer
LEAD Technologies, Inc.

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