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--[[
This file is part of mpv.
mpv is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
mpv is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with mpv. If not, see <http://www.gnu.org/licenses/>.
]]
local options = {
toggle_align_to_cursor = false,
suppress_osd = false,
}
require "mp.options".read_options(options, nil, function () end)
local function clamp(value, min, max)
return math.min(math.max(value, min), max)
end
mp.add_key_binding(nil, "pan-x", function (t)
if t.event == "up" then
return
end
local dims = mp.get_property_native("osd-dimensions")
local width = dims.w - dims.ml - dims.mr
-- 1 video-align shifts the OSD by (width - osd-width) / 2 pixels, so the
-- equation to find how much video-align to add to offset the OSD by
-- osd-width is:
-- x/1 = osd-width / ((width - osd-width) / 2)
local amount = t.arg * t.scale * 2 * dims.w / (width - dims.w)
mp.commandv("add", "video-align-x", clamp(amount, -2, 2))
end, { complex = true, scalable = true })
mp.add_key_binding(nil, "pan-y", function (t)
if t.event == "up" then
return
end
local dims = mp.get_property_native("osd-dimensions")
local height = dims.h - dims.mt - dims.mb
local amount = t.arg * t.scale * 2 * dims.h / (height - dims.h)
mp.commandv("add", "video-align-y", clamp(amount, -2, 2))
end, { complex = true, scalable = true })
mp.add_key_binding(nil, "drag-to-pan", function (t)
if t.event == "up" then
mp.remove_key_binding("drag-to-pan-mouse-move")
return
end
local dims = mp.get_property_native("osd-dimensions")
local old_mouse_pos = mp.get_property_native("mouse-pos")
local old_align_x = mp.get_property_native("video-align-x")
local old_align_y = mp.get_property_native("video-align-y")
mp.add_forced_key_binding("MOUSE_MOVE", "drag-to-pan-mouse-move", function ()
local mouse_pos = mp.get_property_native("mouse-pos")
-- 1 video-align shifts the OSD by (dimension - osd_dimension) / 2 pixels,
-- so the equation to find how much video-align to add to offset the OSD
-- by the difference in mouse position is:
-- x/1 = (mouse_pos - old_mouse_pos) / ((dimension - osd_dimension) / 2)
local align = old_align_x + 2 * (mouse_pos.x - old_mouse_pos.x)
/ (dims.ml + dims.mr)
mp.set_property("video-align-x", clamp(align, -1, 1))
align = old_align_y + 2 * (mouse_pos.y - old_mouse_pos.y)
/ (dims.mt + dims.mb)
mp.set_property("video-align-y", clamp(align, -1, 1))
end)
end, { complex = true })
local align_to_cursor_bound = false
local function align_to_cursor(_, mouse_pos)
local dims = mp.get_property_native("osd-dimensions")
local align = (mouse_pos.x * 2 - dims.w) / dims.w
mp.set_property("video-align-x", clamp(align, -1, 1))
align = (mouse_pos.y * 2 - dims.h) / dims.h
mp.set_property("video-align-y", clamp(align, -1, 1))
end
mp.add_key_binding(nil, "align-to-cursor", function (t)
if options.toggle_align_to_cursor == false then
if t.event == "down" then
mp.observe_property("mouse-pos", "native", align_to_cursor)
else
mp.unobserve_property(align_to_cursor)
end
return
end
if t.event ~= "up" then
return
end
if align_to_cursor_bound then
mp.unobserve_property(align_to_cursor)
else
mp.observe_property("mouse-pos", "native", align_to_cursor)
end
align_to_cursor_bound = not align_to_cursor_bound
end, { complex = true })
mp.add_key_binding(nil, "cursor-centric-zoom", function (t)
local amount = t.arg * t.scale
local command = (options.suppress_osd and "no-osd " or "") ..
"add video-zoom " .. amount .. ";"
local x, y
local touch_positions = mp.get_property_native("touch-pos")
if touch_positions[1] then
for _, position in pairs(touch_positions) do
x = x + position.x
y = y + position.y
end
x = x / #touch_positions
y = y / #touch_positions
else
local mouse_pos = mp.get_property_native("mouse-pos")
x = mouse_pos.x
y = mouse_pos.y
end
local dims = mp.get_property_native("osd-dimensions")
local width = (dims.w - dims.ml - dims.mr) * 2^amount
local height = (dims.h - dims.mt - dims.mb) * 2^amount
local old_cursor_ml = dims.ml - x
local cursor_ml = old_cursor_ml * 2^amount
local ml = cursor_ml + x
-- video/out/aspect.c:src_dst_split_scaling() defines ml as:
-- ml = (osd-width - width) * (video-align-x + 1) / 2 + pan-x * width
-- So video-align-x is:
local align = 2 * (ml - mp.get_property_native("video-pan-x") * width)
/ (dims.w - width) - 1
command = command .. "no-osd set video-align-x " .. clamp(align, -1, 1) .. ";"
local mt = (dims.mt - y) * 2^amount + y
align = 2 * (mt - mp.get_property_native("video-pan-y") * height)
/ (dims.h - height) - 1
command = command .. "no-osd set video-align-y " .. clamp(align, -1, 1)
mp.command(command)
end, { complex = true, scalable = true })
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