OTA. to TGA extractor

[kudos]

Do you remeber the OTA format? The simple graphic format that you could send as a SMS message? Anyway, I found a cool OTA image on my cellphone, and wanted to extract it to a "normal" graphics format, and add it to a t-shirt (it also writes the image out to stdout as a number of '#'s)

#ota2tga
 
def writetga(width,height,data,filename):
 f = open(filename,"wb")
 file = ""
 file+="%c%c%c" % (0,0,2)
 file+="%c%c%c%c%c" % (0,0,0,0,0)
 file+="%c%c%c%c" % (0,0,0,0)
 file+="%c%c" % ((width & 0x00ff)%0xff,(width & 0xff00)%0xff)
 file+="%c%c" % ((height & 0x00ff)%0xff,(height & 0xff00)%0xff)
 file+="%c%c" % (0x18,0x0)
 for i in range(height):
  for j in range(width):
   file+="%c%c%c" % (data[j+(height-1-i)*(width-1)][0],data[j+(height-1-i)*(width-1)][1],data[j+(height-1-i)*(width-1)][2])
 f.write(file)
 f.close()
 
# add the name of your .ota file here.
f = open("Grafikkmelding.ota","rb")
info = ord(f.read(1))
width = ord(f.read(1))
height = ord(f.read(1))
color = ord(f.read(1))
 
pixmap = [[255,255,255]]*(72*28)
print width
print height
x = 0
y = 0
l = ""
for i in range(height):
 for j in range(width / 8):
  v = ord(f.read(1))
  for k in range(8):
   if( ((v >> 7-k) & 0x01) == 0):
    l+=" "
    pixmap[x+y*width] = [255,255,255]
   else:
    l+="#"
    pixmap[x+y*width] = [0,0,0]
   x+=1
   if(x > width):
    x=0
    y+=1
 l+="\n"   
f.close()
print l
writetga(width,height,pixmap,"output.tga")
 

-kudos