pue demo

--demo for pue (paintutils extra)
-- pastebin get weLUU423 puedemo
if not fs.exists("pue") then
    print("Downloading PUE...")
    local file = fs.open(fs.combine(fs.getDir(shell.getRunningProgram()),"pue"),"w")
    file.write(http.get("https://pastebin.com/raw/7XAmsAbX").readAll())
    file.close()
end
shell.run("pue")

local tArg = {...}
local image = tArg[1] and paintutils.autocrop(paintutils.loadImage(tArg[1])) or {{32,32,32,32,32,32,512,512,512,512,512},{32,8192,32,8192,32,8192,2048,2048,512,512,512},{32,8192,8192,8192,32,32,2048,512,512,512,512},{32,8192,32,8192,32,8192,2048,2048,512,2048,512},{32,32,32,32,32,32,512,512,512,512,512}}

local mon = peripheral.find("monitor")
if mon then mon.setTextScale(0.5) end
local scr_x,scr_y = term.getSize()

--scale image down to highest effective resolution

local imgXsize, imgYsize = paintutils.getSize(image)
if imgXsize > scr_x or imgYsize > scr_y then
    if imgXsize < imgYsize then
        image = paintutils.stretchImage(image,scr_x,imgYsize*(scr_x/imgXsize))
    else
        image = paintutils.stretchImage(image,imgXsize*(scr_y/imgYsize),scr_y)
    end
end

local fliptest = function()
    local buffer = 1
    local bg = paintutils.fullScreen(colors.black)
    local img
    local objectX,objectY,objectXspeed,objectYspeed = 2, 2, 1, 1
    local objImg
    local objSizeX,objSizeY = 13, 10
    while true do
        buffer = (buffer + 0.05) % 360
        if (objectX >= scr_x-objSizeX) or (objectX <= 1) then
            objectXspeed = objectXspeed * -1
        end
        if (objectY >= scr_y-objSizeY) or (objectY <= 1) then
            objectYspeed = objectYspeed * -1
        end
        objectX = objectX + objectXspeed
        objectY = objectY + objectYspeed

        local bigImgScaleX = math.sin(buffer)*(scr_x-2)
        local bigImgScaleY = math.cos(buffer/3)*(scr_y-2)

        local bigImage = paintutils.centerWithBlankSpace(paintutils.stretchImage(image,bigImgScaleX,bigImgScaleY))
        objImg = paintutils.stretchImage(image,math.cos(buffer*4)*objSizeX,objSizeY)
        img = paintutils.merge({objImg,objectX,objectY}, {bigImage,1,1}, {bg,1,1})
        paintutils.drawImageBlit(img,1,1)
        sleep(0.05)
    end
end

fliptest()

--1+(scr_x/2)-math.abs(bigImgScaleX/2),1+(scr_y/2)-math.abs(bigImgScaleY/2) --old math for centering big image