ExperimentalGear/scripts/common/dimensions.lua

local dimtable = {
    design = {width = 1080, height = 1920},
    screen = {width = nil, height = nil},
    view = {width = nil, height = nil},
    ratio = {landscapeUW = 21 / 9, landscapeWide = 16 / 9, landscapeStd = 4 / 3, portrait = 9 / 16},
}

local function transformToScreenSpace()
    gfx.Translate((dimtable.screen.width - dimtable.view.width) / 2, 0);
    gfx.Scale(dimtable.view.width / dimtable.design.width, dimtable.view.height / dimtable.design.height);
    gfx.Scissor(0, 0, dimtable.design.width, dimtable.design.height);
end

local function updateResolution(ratio)
    if not ratio then ratio = dimtable.ratio.portrait end

    local screenWidth, screenHeight = game.GetResolution()
    if screenWidth ~= dimtable.screen.width or screenHeight ~= dimtable.screen.height then
        dimtable.screen.width, dimtable.screen.height = screenWidth, screenHeight
        dimtable.view.width, dimtable.view.height = ratio * dimtable.screen.height, dimtable.screen.height
    end
end

-- return by reference trickery:

local t = dimtable
t.transformToScreenSpace = transformToScreenSpace
t.updateResolution = updateResolution
return t