62 lines
2.1 KiB
Python
62 lines
2.1 KiB
Python
from art_export import ArtExporter
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WIDTH = 80
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ENCODING = "cp1252" # old default
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ENCODING = "us-ascii" # DEBUG
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ENCODING = "latin_1" # DEBUG - seems to handle >128 chars ok?
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class ANSExporter(ArtExporter):
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format_name = "ANSI"
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format_description = """
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Classic scene format using ANSI standard codes.
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Assumes 80 columns, DOS character set and EGA palette.
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Exports active layer of active frame.
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"""
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file_extension = "ans"
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def get_display_command(self, fg, bg):
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"return a display command sequence string for given colors"
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# reset colors on every tile
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s = chr(27) + chr(91) + "0;"
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if fg >= 8:
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s += "1;"
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fg -= 8
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if bg >= 8:
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s += "5;"
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bg -= 8
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s += "%s;" % (fg + 30)
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s += "%s" % (bg + 40)
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s += "m"
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return s
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def write(self, data):
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self.outfile.write(data.encode(ENCODING))
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def run_export(self, out_filename, options):
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# binary file; encoding into ANSI bytes happens just before write
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self.outfile = open(out_filename, "wb")
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layer = self.art.active_layer
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frame = self.art.active_frame
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for y in range(self.art.height):
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for x in range(WIDTH):
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# cut off tiles beyond supported width
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if x >= self.art.width - 1:
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continue
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char, fg, bg, xform = self.art.get_tile_at(frame, layer, x, y)
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# offset palette indices so 0 = black not transparent
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fg -= 1
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bg -= 1
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# write a display command every tile
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# works fine, though it's a larger file - any real downside to this?
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self.write(self.get_display_command(fg, bg))
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# write the character for this tile
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if char > 31:
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self.write(chr(char))
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else:
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# special (top row) chars won't display in terminal anyway
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self.write(chr(0))
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# carriage return + line feed
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self.outfile.write(b"\r\n")
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self.outfile.close()
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return True
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