67 lines
2.1 KiB
Python
67 lines
2.1 KiB
Python
from art_import import ArtImporter
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# import as white on black for ease of edit + export
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DEFAULT_FG, DEFAULT_BG = 113, 1
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# most ATAs are 40 columns, but some are a couple chars longer and a few are 80!
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WIDTH, HEIGHT = 80, 40
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class ATAImporter(ArtImporter):
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format_name = "ATASCII"
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format_description = """
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ATARI 8-bit computer version of ASCII.
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Imports with ATASCII character set and Atari palette.
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"""
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allowed_file_extensions = ["ata"]
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def run_import(self, in_filename, options={}):
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self.set_art_charset("atari")
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self.set_art_palette("atari")
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self.resize(WIDTH, HEIGHT)
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self.art.clear_frame_layer(0, 0, DEFAULT_BG)
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# iterate over the bytes
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data = open(in_filename, "rb").read()
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i = 0
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x, y = 0, 0
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while i < len(data):
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fg, bg = DEFAULT_FG, DEFAULT_BG
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if x >= WIDTH:
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x = 0
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y += 1
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if y >= HEIGHT:
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y = HEIGHT - 1
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char = data[i]
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# handle control characters
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# (most not supported!)
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# https://en.wikipedia.org/wiki/ATASCII#Control_characters_2
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# tab
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if char == 127:
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x += 4
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i += 1
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continue
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# backspace
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elif char == 126:
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x -= 1
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i += 1
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continue
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# line break
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elif char == 155:
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x = 0
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y += 1
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i += 1
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continue
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# over 127: inverted set
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elif char > 127:
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fg, bg = DEFAULT_BG, DEFAULT_FG
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# being a little fancy here, redo if it backfires
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char -= 128
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# handle mismatch between playscii's version of ATASCII (which
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# prefers to have character index 0 empty) and the real ATASCII
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if char == 0:
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char = 32
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elif char == 32:
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char = 0
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self.art.set_tile_at(0, 0, x, y, char, fg, bg)
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x += 1
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i += 1
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return True
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