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if not modules then modules = { } end modules ['back-mps'] = {
version = 1.001,
comment = "companion to lpdf-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- The basics are the same as the lua variant.
local formatters = string.formatters
local bpfactor = number.dimenfactors.bp
local buffer = { }
local b = 0
local function reset()
buffer = { }
b = 0
end
local function initialize(specification)
reset()
end
local function finalize()
end
local function fetch()
local saved = buffer
reset()
return saved
end
local function flushcharacter(current, pos_h, pos_v, pod_r, font, char)
b = b + 1 ; buffer[b] = { "glyph", font, char, pos_h, pos_v, pos_r }
end
local function flushrule(current, pos_h, pos_v, pod_r, size_h, size_v)
b = b + 1 ; buffer[b] = { "rule", size_h, size_v, pos_h, pos_v, pos_r }
end
drivers.install {
name = "mps",
actions = {
initialize = initialize,
finalize = finalize,
fetch = fetch,
reset = reset,
},
flushers = {
character = flushcharacter,
rule = flushrule,
}
}
if not mp then
return
end
local mpprint = mp.print
local f_glyph = formatters[ [[draw textext.drt("\setfontid%i\relax\char%i\relax") shifted (%N,%N);]] ]
local f_rule = formatters[ [[fill unitsquare xscaled %N yscaled %N shifted (%N,%N);]] ]
local current = nil
local size = 0
function mp.place_buffermake(box)
drivers.convert("mps",box)
current = drivers.action("mps","fetch")
size = #current
end
function mp.place_buffersize()
mpprint(size)
end
function mp.place_bufferslot(i)
if i > 0 and i <= size then
local b = buffer[i]
local t = b[1]
if t == "glyph" then
mpprint(f_glyph(b[2],b[3],b[4]*bpfactor,b[5]*bpfactor))
elseif t == "rule" then
mpprint(f_rule(b[2]*bpfactor,b[3]*bpfactor,b[4]*bpfactor,b[5]*bpfactor))
end
end
end
function mp.place_bufferwipe()
current = nil
size = 0
end
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