2018-04-05 02:15:51 +10:00
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The "braille" library, contrary to
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its name, in fact a library for the
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drawing of graphics using the...
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"repurposed" Braille characters in
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OC's font. This library is meant to
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be usable easily from applications,
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including those that mix text and
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graphics in a normal UI.
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Upon requiring, you get a wrapMeta'd
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table, which consists of two
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functions at this time:
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calcLine(x, y, w, span, get
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[, colour]) -> calc:
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Given an X/Y character position,
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and a given width in characters,
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along with the get function:
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get(xp, yp) -> r, g, b
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(NOTE: These coords are 0-based!)
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and colour (a number, the amount of
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difference required to cause an
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FG/BG change - not giving this
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disables colour output),
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output spans to the span function:
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span(x, y, str, bg, fg)
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new(x, y, w, h, cbs, colour) -> nux:
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Creates a NeoUX component for an
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embedded braille image.
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X, Y, W and H are in characters,
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each character offering 2x4 pixels.
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cbs is a table that may have the
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following fields:
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selectable : The selectable flag.
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key/clipboard :
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Identical to NeoUX's.
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touch/drag/drop/scroll: See NeoUX
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for full details, but the xI and
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yI parameters are gone, and the
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X/Y coordinates are in Braille
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pixels. The button/direction value
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if any remains unchanged, but in
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an earlier position.
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and must have a "get" function:
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get(window, x, y) -> r, g, b
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Gets the R/G/B of a pixel on the
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image, with a 1-based pixel X/Y.
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Details of conversion are hidden
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from the user of this library for
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future improvement by the end-user
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or another party, but in no-colour
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mode, 255, 255, 255 will always
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show white and 0, 0, 0 will always
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show black.
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colour enables colour (see above),
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though if displayed on a screen
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without colour, this option is
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ignored for that time.
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-- This is released into
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the public domain.
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-- No warranty is provided,
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implied or otherwise.
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