CC - Save Pixel Information

local screenX, screenY = term.getSize()
local current = { bg = colours.black, txt = colours.white }
local screen = {}

for x = 1, screenX do
    screen[x] = {}
    for y = 1, screenY do
        screen[x][y] = {
            char = "",
            bgcolor = colours.black,
            txtcolor = colours.white
        }
    end
end

-- Overwrite the globals
function term.setTextColour( col )
    current.txt = col
    term.native.setTextColour( col )
end

function term.setBackgroundColour( col )
    current.bg = col
    term.native.setBackgroundColour( col )
end

function term.setTextColor( col )
    current.txt = col
    term.native.setTextColor( col )
end

function term.setBackgroundColor( col )
    current.bg = col
    term.native.setBackgroundColor( col )
end

function write( ... )
    local x, y = term.getCursorPos()
    local tmp = table.concat( {...}, " " )
    for i = 1, tmp:len() do
        screen[i + x - 1][y].char = tmp:sub( i, i )
        screen[i + x - 1][y].bgcolor = current.bg
        screen[i + x - 1][y].txtcolor = current.txt
    end
    term.native.write( tmp )
end

function print( ... )
    write( unpack( {...} ) )
    term.setCursorPos( 1, ({term.getCursorPos()})[2] + 1 )
end

local function getValueAt( key, x, y )
    return screen[x][y][key]
end

term.setBackgroundColour( colours.blue )
term.clear()

term.setCursorPos( 3, 3 )
term.setTextColor( colors.black )
write( "hello" )

term.setCursorPos( 1, 1 )
print( getValueAt( "char", 3, 3 ) .. " - " .. getValueAt( "txtcolor", 5, 3 ) .. " - " .. getValueAt( "bgcolor", 5, 3 ) )