"""
howto: obs -> window -> filters -> chromake
"""
import pygame as p
import pygame.font as ft
import pygame.sysfont as sft
import pygame.image

textcolor=(0x00, 0x00, 0x00)
chromakey=(0x00, 0xFF, 0x00)
speed=8

d = p.display.set_mode()
c = p.time.Clock()

p.display.init()
"""
print(ft.get_fonts())
ft.init()
sft.initsysfonts()
ff = sft.SysFont('dejavusans', 28)
"""

i = p.sprite.Sprite()
#i.image = ff.render("SWNBR", True, textcolor)
i.image = p.image.load('image.png').convert_alpha()
i.rect = i.image.get_rect()
i.rect.x = (d.get_width()/3)
i.rect.y = (d.get_height()/3)

a=[(speed,speed), (speed,-speed), (-speed,-speed), (-speed,speed)]
b=0
while True:
    c.tick_busy_loop(60)
    d.fill(chromakey)

    tmp = i.rect.move(*a[b])
    while (tmp.left < 0 or
        tmp.top < 0 or
        tmp.right > d.get_width() or
        tmp.bottom > d.get_height()):
        if (b == len(a)-1):
            b = 0
        else:
            b += 1
        tmp = tmp.move(*a[b])
    i.rect = tmp
    d.blit(i.image, i.rect)

    p.display.flip()