mirror of https://github.com/odrling/Aegisub
55 lines
2.3 KiB
Lua
55 lines
2.3 KiB
Lua
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-- Aegisub Automation demonstration script
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-- Original written by Niels Martin Hansen
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-- Given into the public domain
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include("utils.lua")
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name = "Text placement demo"
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description = "Demonstration of the text_extents function, to do per-syllable placement of text."
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version, kind, configuration = 3, 'basic_ass', {}
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function process_lines(meta, styles, lines, config)
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-- Prepare local variables
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local output = { n=0 }
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-- Loop through every line
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for i = 0, lines.n-1 do
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aegisub.report_progress(i/lines.n*100)
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-- Only process dialogue lines
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if lines[i].kind ~= "dialogue" then
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table.insert(output, lines[i])
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else
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-- This is just for making the code a bit easier to read
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local line = lines[i]
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-- Get the rendered size of the entire line. (Won't work if there's line breaks in it.)
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local totalx, totaly = aegisub.text_extents(styles[line.style], line.text_stripped)
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-- Calculate where the first syllable should be positioned, if the line is to appear centered on screen
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local curx, cury = (meta.res_x - totalx) / 2, meta.res_y / 2
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-- And more preparations for per-syllable placement
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local startx = curx
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local tstart, tend = 0, 0
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-- Now process each stllable
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for j = 1, line.karaoke.n-1 do
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-- A shortcut variable, and, most important: a copy of the original line
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local syl, syllin = line.karaoke[j], copy_line(line)
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-- Calculate the ending time of this syllable
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tend = tstart + syl.duration*10
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-- Get the rendered size of this syllable
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local extx, exty, extd, extl = aegisub.text_extents(styles[line.style], syl.text_stripped)
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-- Some debug stuff...
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aegisub.output_debug(string.format("text_extents returned: %d, %d, %d, %d", extx, exty, extd, extl));
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-- Replace the text of the copy of the line with this syllable, moving around
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syllin.text = string.format("{\\an4\\move(%d,%d,%d,%d,%d,%d)\\kf%d\\kf%d}%s", curx, cury, curx, cury-exty, tstart, tend, tstart/10, syl.duration, syl.text)
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-- Add the line to the output
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table.insert(output, syllin)
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-- And prepare for next iteration
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curx = curx + extx
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tstart = tend
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end
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-- More debug stuff
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aegisub.output_debug(string.format("after syllable loop: totalx=%d curx-startx=%d", totalx, curx-startx))
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end
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end
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-- And remember to return something :)
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return output
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end
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