1.1 --- a/tools/makesprites.py	Thu Aug 25 01:41:20 2011 +0200
     1.2 +++ b/tools/makesprites.py	Thu Aug 25 01:41:46 2011 +0200
     1.3 @@ -170,30 +170,81 @@
     1.4      
     1.5      # Read 8 rows at a time.
     1.6      for row in range(0, len(lines), 8):
     1.7 -
     1.8 +    
     1.9          # Read 4 columns at a time.
    1.10          for column in range(0, len(lines[0]), 4):
    1.11 -
    1.12 +        
    1.13              # Read the rows.
    1.14              for line in lines[row:row + 8]:
    1.15 -
    1.16 +            
    1.17                  shift = 3
    1.18                  byte = 0
    1.19                  for pixel in line[column:column + 4]:
    1.20 -
    1.21 +                
    1.22                      if pixel == "1":
    1.23                          byte = byte | (0x01 << shift)
    1.24                      elif pixel == "2":
    1.25                          byte = byte | (0x10 << shift)
    1.26                      elif pixel == "3":
    1.27                          byte = byte | (0x11 << shift)
    1.28 -
    1.29 +                    
    1.30                      shift -= 1
    1.31 -
    1.32 +                
    1.33                  data += chr(byte)
    1.34      
    1.35      return data
    1.36  
    1.37 +def make_scanline_bytes(lines):
    1.38 +
    1.39 +    data = []
    1.40 +    for line in lines:
    1.41 +    
    1.42 +        line_data = ""
    1.43 +        # Read 4 columns at a time.
    1.44 +        for column in range(0, len(lines[0]), 4):
    1.45 +        
    1.46 +            shift = 3
    1.47 +            byte = 0
    1.48 +            for pixel in line[column:column + 4]:
    1.49 +            
    1.50 +                if pixel == "1":
    1.51 +                    byte = byte | (0x01 << shift)
    1.52 +                elif pixel == "2":
    1.53 +                    byte = byte | (0x10 << shift)
    1.54 +                elif pixel == "3":
    1.55 +                    byte = byte | (0x11 << shift)
    1.56 +                
    1.57 +                shift -= 1
    1.58 +            
    1.59 +            line_data += chr(byte)
    1.60 +        
    1.61 +        data.append(line_data)
    1.62 +    
    1.63 +    return data
    1.64 +
    1.65 +def compress(data):
    1.66 +
    1.67 +    output = []
    1.68 +    current = None
    1.69 +    length = 0
    1.70 +    
    1.71 +    for byte in data:
    1.72 +    
    1.73 +        if current != byte:
    1.74 +            if length > 0:
    1.75 +                output.append(current + chr(length))
    1.76 +            current = byte
    1.77 +            length = 1
    1.78 +        else:
    1.79 +            length += 1
    1.80 +            if length == 255:
    1.81 +                output.append(current + chr(length))
    1.82 +                length = 0
    1.83 +    
    1.84 +    if length > 0:
    1.85 +        output.append(current + chr(length))
    1.86 +    
    1.87 +    return "".join(output)
    1.88  
    1.89  def read_sprites(sprites):
    1.90