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mpv/TOOLS/lua/osd-test.lua

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command: extend osd-overlay command with bounds reporting This is more or less a minimal hack to make _some_ text measurement functionality available to scripts. Since libass does not support such a thing, this simply uses the bounding box of the rendered text. This is far from ideal. Problems include: - using a bitmap bounding box - additional memory waste and/or flushing caches - dependency on window size - odd small deviations with different window sizes (run osd-test.lua and resize the window after each timer update; the bounding boxes aren't adjusted in an overly useful way) - inability to query the size _after_ actual rendering But I guess it's a start. Since I'm aware that it's crap, add a threat to the manpage that this may be changed/removed again. For now, I'm interested whether anyone will have use for it in its current form, as it's an often requested feature.
2020-03-06 17:20:11 +00:00
local assdraw = require 'mp.assdraw'
local utils = require 'mp.utils'
TOOLS/osd-test.lua: fix lint warning
2024-05-27 21:11:53 +00:00
local things = {}
command: extend osd-overlay command with bounds reporting This is more or less a minimal hack to make _some_ text measurement functionality available to scripts. Since libass does not support such a thing, this simply uses the bounding box of the rendered text. This is far from ideal. Problems include: - using a bitmap bounding box - additional memory waste and/or flushing caches - dependency on window size - odd small deviations with different window sizes (run osd-test.lua and resize the window after each timer update; the bounding boxes aren't adjusted in an overly useful way) - inability to query the size _after_ actual rendering But I guess it's a start. Since I'm aware that it's crap, add a threat to the manpage that this may be changed/removed again. For now, I'm interested whether anyone will have use for it in its current form, as it's an often requested feature.
2020-03-06 17:20:11 +00:00
for i = 1, 2 do
things[i] = {
osd1 = mp.create_osd_overlay("ass-events"),
osd2 = mp.create_osd_overlay("ass-events")
}
end
things[1].text = "{\\an5}hello\\Nworld"
things[2].text = "{\\pos(400, 200)}something something"
mp.add_periodic_timer(2, function()
for i, thing in ipairs(things) do
thing.osd1.data = thing.text
thing.osd1.compute_bounds = true
--thing.osd1.hidden = true
local res = thing.osd1:update()
print("res " .. i .. ": " .. utils.to_string(res))
thing.osd2.hidden = true
if res ~= nil and res.x0 ~= nil then
local draw = assdraw.ass_new()
draw:append("{\\alpha&H80}")
draw:draw_start()
draw:pos(0, 0)
draw:rect_cw(res.x0, res.y0, res.x1, res.y1)
draw:draw_stop()
thing.osd2.hidden = false
thing.osd2.data = draw.text
end
thing.osd2:update()
end
end)