Problem on bitmap OutputStream

I have a method to output the image stream to printer. The method managed to output part of the image but hit into error, as shown below, when output the last part of the image (as in bold). I don't understand how the outputstream lenght works? I checked the bitmap image buffer always [999]. In this case, how can i print the last part of the image? Thanks in advance.

bmp width = 180, bmp height=120
bmpRow =4

row (i) = 0, width = 23, line =30
Offset = 0, Lenght = 689

row (i) = 1, width =...

Problem on bitmap OutputStream

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