author almikes@aol.com
Wed, 03 Dec 2014 20:55:58 +0000
changeset 436 0afdd1b1042c
parent 432 e441f3f51dac
child 666 f38a002a0796
permissions -rw-r--r--
Some basic clarifications about mask, add link to nemo’s mask guide, add link to Pngcrush, some typographic improvements.

#summary Short description of the file format of hand-drawn maps

Drawn map is described by a list of points, which define polylines to draw and format of each polyline.

Point is defined as
|| Big-endian int16 || Big-endian int16 || Byte ||
|| *X* coordinate || *Y* coordinate || *flags* ||

where *flags* are:
|| 8th bit || 7th bit || 6th-1st bits ||
|| if set, this is a first point of polyline || if set, polyline is erasing || *width*(thickness) of line ||

where *width* defines `(width * 10) + 6` pixels width line to draw

Second and further points of polyline have 8th bit of *flags* unset, the content of others doesn't matter.

Single-point polyline defines a circle (well, that's kinda obvious).