Created
October 7, 2015 04:55
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Generating a ppm p6 file in python
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# Define screen size | |
DISPLAY_WIDTH = 32 * 1 #32 pixels x 1 displays | |
DISPLAY_HEIGHT = 16 | |
# Define a screen that has (width X height) numbers of 'pixels'. Each pixel is an RGB triplet | |
# with max value of 255. Even though our actual screen is 2-D it is stored as a 1-D array. Pixels | |
# 0 - 31 are the first row, 32 - 63 are the second row, etc. | |
screen = [[0,0,0] for x in xrange(self.DISPLAY_WIDTH*self.DISPLAY_HEIGHT)] | |
# Here is where you would set the value of each pixel | |
# Output | |
# Header values for the file | |
width=self.DISPLAY_WIDTH | |
height=self.DISPLAY_HEIGHT | |
comment='any comment string' | |
ftype='P6' #'P6' for binary | |
# First write the header values | |
ppmfile=open("picture.ppm",'wb+') # note the binary flag | |
ppmfile.write("%s\n" % (ftype)) | |
ppmfile.write("#%s\n" % comment ) | |
ppmfile.write("%d %d\n" % (width, height)) | |
ppmfile.write("255\n") | |
# Then loop through the screen and write the values | |
for red,green,blue in self.screen: | |
ppmfile.write("%c%c%c" % (red,green,blue)) | |
ppmfile.close() |
It is a really simple yet useful code snippet. Thanks!
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It helped me a lot.