100 lines
2.7 KiB
Lua
100 lines
2.7 KiB
Lua
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--[[
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CScreen v1.3 by CodeNMore
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A simple way to make resolution-independent Love2D games
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Tested for LOVE 0.10.1
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See: https://github.com/CodeNMore/CScreen
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Zlib License:
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Copyright (c) 2016 CodeNMore
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This software is provided 'as-is', without any express or implied warranty.
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In no event will the authors be held liable for any damages arising from
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the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software in
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a product, an acknowledgment in the product documentation would be appreciated
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but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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--]]
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local CScreen = {}
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local rx, ry, ctr = 800, 600, true
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local rxv, ryv, fsv, fsvr = 800, 600, 1.0, 1.0
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local tx, ty, rwf, rhf = 0, 0, 800, 600
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local cr, cg, cb, ca = 0, 0, 0, 255
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-- Initializes CScreen with the initial size values
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function CScreen.init(tw, th, cntr)
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rx = tw or 800
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ry = th or 600
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ctr = cntr or false
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CScreen.update(love.graphics.getWidth(), love.graphics.getHeight())
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end
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-- Draws letterbox borders
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function CScreen.cease()
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if ctr then
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local pr, pg, pb, pa = love.graphics.getColor()
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love.graphics.setColor(cr, cg, cb, ca)
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love.graphics.scale(fsvr, fsvr)
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if tx ~= 0 then
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love.graphics.rectangle("fill", -tx, 0, tx, rhf)
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love.graphics.rectangle("fill", rxv, 0, tx, rhf)
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elseif ty ~= 0 then
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love.graphics.rectangle("fill", 0, -ty, rwf, ty)
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love.graphics.rectangle("fill", 0, ryv, rwf, ty)
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end
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love.graphics.setColor(pr, pg, pb, pa)
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end
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end
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-- Scales and centers all graphics properly
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function CScreen.apply()
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if ctr then
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love.graphics.translate(tx, ty)
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end
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love.graphics.scale(fsv, fsv)
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end
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-- Updates CScreen when the window size changes
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function CScreen.update(w, h)
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local sx = w / rx
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local sy = h / ry
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fsv = math.min(sx, sy)
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fsvr = 1 / fsv
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-- Centering
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if ctr and fsv == sx then -- Vertically
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tx = 0
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ty = (h / 2) - (ry * fsv / 2)
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elseif ctr and fsv == sy then -- Horizontally
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ty = 0
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tx = (w / 2) - (rx * fsv / 2)
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end
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-- Variable sets
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rwf = w
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rhf = h
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rxv = rx * fsv
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ryv = ry * fsv
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end
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-- Convert from window coordinates to target coordinates
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function CScreen.project(x, y)
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return math.floor((x - tx) / fsv), math.floor((y - ty) / fsv)
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end
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-- Change letterbox color
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function CScreen.setColor(r, g, b, a)
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cr = r
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cg = g
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cb = b
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ca = a
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end
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-- Return the table for use
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return CScreen
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