utils/make_gl_stipple_from_xpm.py

   1 # SPDX-License-Identifier: GPL-2.0-or-later
   2
   3 # Converts 32x32 XPM images written be the gimp to GL stipples
   4 # takes XPM files as arguments, prints out C style definitions.
   5
   6 import sys
   7 import os
   8
   9
  10 def main():
  11     xpm_ls = [f for f in sys.argv[1:] if f.lower().endswith(".xpm")]
  12
  13     print("Converting: " + " ".join(xpm_ls))
  14
  15     for xpm in xpm_ls:
  16         f = open(xpm, "r")
  17         data = f.read()
  18         f.close()
  19
  20         # all after first {
  21         data = data.split("{", 1)[1]
  22
  23         # all before first }
  24         data = data.rsplit("}", 1)[0]
  25
  26         data = data.replace("\n", "")
  27
  28         data = data.split(",")
  29
  30         w, h, c, dummy = map(int, data[0].strip("\"").split())
  31
  32         if w != 32 or h != 32 or c != 2:
  33             print("Skipping %r, expected 32x32, monochrome, got %s" %
  34                   (xpm, data[0]))
  35             continue
  36
  37         # col_1 = data[1][1]
  38         col_2 = data[2][1]
  39
  40         data = [d[1:-1] for d in data[3:]]
  41
  42         bits = []
  43
  44         for d in data:
  45             for i, c in enumerate(d):
  46                 bits.append('01'[(c == col_2)])
  47
  48         if len(bits) != 1024:
  49             print("Skipping %r, expected 1024 bits, got %d" %
  50                   (xpm, len(bits)))
  51             continue
  52
  53         bits = "".join(bits)
  54
  55         chars = []
  56
  57         for i in range(0, len(bits), 8):
  58             chars.append("0x%.2x" % int(bits[i:i + 8], 2))
  59
  60         fout = sys.stdout
  61
  62         var = os.path.basename(xpm)
  63         var = os.path.splitext(var)[0]
  64
  65         fout.write("GLubyte stipple_%s[128] {\n\t" % var)
  66         for i, c in enumerate(chars):
  67             if i != 127:
  68                 fout.write("%s, " % c)
  69             else:
  70                 fout.write("%s" % c)
  71
  72             if not ((i + 1) % 8):
  73                 fout.write("\n\t")
  74         fout.write("};\n")
  75
  76
  77 if __name__ == "__main__":
  78     main()