local img = assert(image_load("/home/hkc/images/wallpapers/wallpaper.png"))
local font = assert(font_load("/usr/share/fonts/TTF/TerminusTTF.ttf"))

function tick()
    --           Background
    clear_screen(0xFF131313)

    --         Color ARGB,  x,  y
    draw_pixel(0xFFFF0000, 30, 30)

    --        Color ARGB, thickness,  x1,  y1,  x2,  y2,  xn,  yn, ...
    draw_line(0xFFFF00FF,         8, 100, 100, 200, 400, 300, 600) --> { Vec2, ... }
    --        Color ARGB, thickness,  x1,  y1,  x2,  y2,  xn,  yn, ...
    draw_poly(0xFFFF00FF,         8, 100, 100, 200, 400, 300, 600) --> Rect

    --          Color ARGB, radius,   x,   y, start, end
    draw_circle(0xFFFF0000,     20, 300, 300) --> Rect
    --        Color ARGB, outer, inner,  x,   y, start, end
    draw_ring(0xFF00FF00,    30,    20, 300, 300) --> Rect

    --             Color ARGB,   x,   y,   w,   h
    draw_rect_fill(0xFF00FFFF, 100, 700, 320, 240) --> Rect
    --        Color ARGB, thickness,   x,   y,   w,   h
    draw_rect(0xFFFF00FF,         8, 100, 700, 320, 240) --> Rect

    --        font,            text, size,   x,   y, Color ARGB
    draw_text(font, "Hello, world!",   32, 400, 400, 0xFFFF00FF) --> Rect

    --          image ptr  x, y, w, h, src_x, src_y, src_w, src_h
    draw_image(       img, 0, 0) --> Rect
end

function unload()
    image_free(img)
    font_free(font)
end