local vips = require("lua-vips")

local base = vips.Image.new_from_file("thumbnail_base.png")
print("Enter Path of Sprite:")
local sprite = io.read()

local sprite_img = vips.Image.new_from_file(sprite)

local sprite_height = sprite_img:height()
local sprite_width = sprite_img:width()

local biggest_size = ((sprite_height>sprite_width) and sprite_height) or ((sprite_width>sprite_height) and sprite_width) --Gives me the biggest size (if image is 20x10, gives me 20)
if sprite_height == sprite_width then --If both sizes are the same (like 10x10) it just gives me 10
    biggest_size = sprite_height
end
print(biggest_size)

sprite_img = sprite_img:gravity("centre", biggest_size*1, biggest_size*1) --Adds empty space around the sprite
sprite_img:pngsave("sprite_step1_cropped.png")

sprite_img = sprite_img:resize(2, {kernel="VIPS_KERNEL_NEAREST"}) --Scales the sprite up A LOT
sprite_img:pngsave("sprite_step2_resized.png")

if (sprite_img:height() % 2) == 0 then
    sprite_img = sprite_img:gravity("centre", sprite_img:height()+1, sprite_img:height()+1) --If the sprite is not odd, adds 1 to the height and width
    sprite_img:pngsave("sprite_step3_resized2.png")
end
 
sprite_img = sprite_img:rotate(45, {interpolate="No idea what to put here"}) --Rotates the sprite 45° <<<<<< THIS IS WHERE I'M CONFUSED
sprite_img:pngsave("sprite_step4_rotated.png")

local sprite_width2 = sprite_img:width() --Gets the sprite's width again

sprite_img = sprite_img:resize(256/sprite_width2) --Returns the sprite to 256x256 resolution
sprite_img:pngsave("sprite_step5_resized3.png")

base = base:add(sprite_img) --Adds the sprite on top of the thumbnail_base

base:pngsave("x.png") --Exports the final result