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Drawn map is described by a list of points, which define polylines to draw and format of each polyline.
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Point is defined as
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|| Big-endian int16 || Big-endian int16 || Byte ||
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|| *X* coordinate || *Y* coordinate || *flags* ||
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where *flags* are:
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8 |
|| 8th bit || 7th bit || 6th-1st bits ||
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|| if set, this is a first point of polyline || if set, polyline is erasing || *width*(thickness) of line ||
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where *width* defines `(width * 10) + 6` pixels width line to draw
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Second and further points of polyline have 8th bit of *flags* unset, the content of others doesn't matter.
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Single-point polyline defines a circle (well, that's kinda obvious). |