Jimmie He wrote: > I'm trying to read in the BMP data by the the code below,and I'm check > the data array with WINHEX,and it is correct,but which confuse me is > why the size is 0x180,but the actual picture should be 48*48 = 0x120 > bytes because I use 1-bit BMP not the 24bit BMP,could any one give some > hints?
According to wikipedia <http://en.wikipedia.org/wiki/BMP_file_format> """ The size of each row is rounded up to a multiple of 4 bytes [...] """ So 48/8 == 6 will be rounded to 8, and 8*48 == 384 == 0x180. > handle1=open( bmpfilename ,"rb") > raw = bytearray(handle1.read( )) > handle1.close To actually do something the last line should be handle1.close(). I recommend with open(bmpfilename ,"rb") as handle1: raw = bytearray(handle1.read()) instead which has the additional advantage that the file will be closed if an exception occurs in the with-suite. -- http://mail.python.org/mailman/listinfo/python-list
