85 lines
2.3 KiB
Python
85 lines
2.3 KiB
Python
import sys
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WIDTH = 80
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HEIGHT = 25
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# ANSI orders the colours black, red, green, yellow, blue, magenta, cyan, white
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# VGA orders them black, blue, green, cyan, red, magenta, yellow, white
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color_map = [0, 4, 2, 6, 1, 5, 3, 7]
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if len(sys.argv) != 7:
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print("Usage: {sys.argv[0]} outfile infile default_fgcolor default_bgcolor origin_x origin_y", file=sys.stderr)
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sys.exit(1)
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outfile = sys.argv[1]
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infile = sys.argv[2]
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default_fgcolor = int(sys.argv[3])
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assert 0 <= default_fgcolor <= 15
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default_bgcolor = int(sys.argv[4])
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assert 0 <= default_bgcolor <= 15
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origin_x = int(sys.argv[5])
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assert 0 <= origin_x < WIDTH
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origin_y = int(sys.argv[6])
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assert 0 <= origin_y < HEIGHT
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chars = [bytearray([0]*HEIGHT) for _ in range(WIDTH)]
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attributes = [[(default_fgcolor, default_bgcolor)]*HEIGHT for _ in range(WIDTH)]
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with open(infile, 'rb') as f:
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ansitext = f.read()
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x = origin_x
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y = origin_y
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fgcolor = default_fgcolor
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bgcolor = default_bgcolor
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line = 1
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line_start = 0
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index = 0
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while index < len(ansitext):
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if ansitext[index:].startswith(b'\x1b['):
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index += len(b'\x1b[')
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escape_length = ansitext[index:].index(b'm')
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escape = ansitext[index:index+escape_length]
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for color_parameter in escape.split(b';'):
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color_parameter = int(color_parameter)
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if color_parameter == 39:
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fgcolor = default_fgcolor
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elif color_parameter == 49:
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bgcolor = default_bgcolor
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elif 30 <= color_parameter <= 37:
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fgcolor = color_map[color_parameter - 30]
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elif 40 <= color_parameter <= 47:
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bgcolor = color_map[color_parameter - 40]
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elif 90 <= color_parameter <= 97:
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fgcolor = color_map[color_parameter - 90] + 8
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elif 100 <= color_parameter <= 107:
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bgcolor = color_map[color_parameter - 100] + 8
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else:
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print(f'{line},{index-line_start+1}: Unknown colour escape {color_parameter}')
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index += escape_length + len(b'm')
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elif ansitext[index] == 13:
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x = origin_x
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index += 1
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elif ansitext[index] == 10:
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for i in range(x, WIDTH):
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attributes[i][y] = (fgcolor, bgcolor)
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x = origin_x
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y += 1
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index += 1
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line += 1
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line_start = index
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else:
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chars[x][y] = ansitext[index]
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attributes[x][y] = (fgcolor, bgcolor)
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index += 1
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x += 1
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with open(outfile, 'wb') as f:
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for y in range(HEIGHT):
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for x in range(WIDTH):
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fgcolor, bgcolor = attributes[x][y]
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char = chars[x][y]
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f.write(bytes([char, (bgcolor<<4) | fgcolor]))
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