-- A fundamental concept behind content scaling is content area. In Corona, your base

-- content area can be whatever you wish, but often it's based around a common screen

-- width/height aspect ratio like 2:3, for example 320×480

content = {

-- Sample aspect driven width/height

-- width = aspectRatio > 1.5 and 320 or math.ceil( 480 / aspectRatio ),

-- height = aspectRatio < 1.5 and 480 or math.ceil( 320 * aspectRatio ),

-- Content for 1080p scale

width = 800, -- these need to be backward for Lanscape as Corona thinks

height = 1280, -- all devices are Portrait by default

-- width = aspectRatio > 1.5 and 720 or math.ceil( 1200 / aspectRatio ),

-- height = aspectRatio < 1.5 and 1200 or math.ceil( 720 * aspectRatio ),

-- The scaling method of the content area is determined by the scale value. If you

-- omit this (not recommended), the width and height values will be ignored and the

-- content area will be set to the device's actual pixel width and height.

-- "letterbox" — scales the content area to fill the screen while preserving the same aspect ratio.

-- "zoomEven" — scales the content area to fill the screen while preserving the same aspect ratio.

-- "adaptive" — instead of a static content area, a dynamic content width and height is chosen based on the device.

-- "zoomStretch" — scales the content area to fill the entire screen.

scale = "letterBox",

-- If you need to align the content area to a particular edge of the screen, you can use

-- the xAlign and yAlign values.

-- By default, scaled content is centered on the screen. In letterbox scale mode, empty

-- screen area will be evenly divided between both sides. In zoomEven mode, the bleed

-- area will be cropped equally on both sides.

xAlign = "center", -- Possible values are "left", "center", or "right".

yAlign = "center", --Possible values are "top", "center", or "bottom".

-- The default frame rate is 30 frames per second, but you can set it to 60 frames per second

-- by adding the fps key. Values other than 30 or 60 will be ignored.

fps = 60,

-- local deviceScale = display.pixelWidth / display.actualContentWidth

-- This is the scale factor for the device. If the value on a particular device is greater

-- than or equal to the number you specify for the scale factor, Corona will use images

-- from that suffix set.

-- imageSuffix = {

-- ["@2x"] = 1.5

-- High-resolution devices (Retina iPad, Kindle Fire HD 9", Nexus 10, etc.) will use @2x-suffixed images.

-- Devices less than 1200 pixels in width (iPhone 5, iPad 2, Kindle Fire 7", etc.) will use non-suffixed images

-- },

-- This is used to override the default shader precision for all OpenGL ES shaders (on devices).

-- You should not specify this unless you absolutely require higher precision and see no performance

-- impact from setting it.

-- shaderPrecision = "highp", -- Acceptable values are "highp", "mediump", and "lowp".

}, -- end of content

-- This global setting triggers pop-up error messages while running an app in the Simulator.

-- If you don't like this feature or if it doesn't fit your workflow, you can turn it off.

--showRuntimeErrors = true,

-- The Corona licensing library lets you confirm that the app was bought from a store.

-- To implement licensing, the license table must be added to the application table of config.lua.

license = {

google = {

key = "", -- required

policy = "", -- optional

},

},