130 lines
3.5 KiB
Python
130 lines
3.5 KiB
Python
#!/usr/bin/env python
|
|
""" pygame.examples.arraydemo
|
|
|
|
Welcome to the arraydemo!
|
|
|
|
Use the numpy array package to manipulate pixels.
|
|
|
|
This demo will show you a few things:
|
|
|
|
* scale up, scale down, flip,
|
|
* cross fade
|
|
* soften
|
|
* put stripes on it!
|
|
|
|
"""
|
|
|
|
|
|
import os
|
|
|
|
import pygame as pg
|
|
from pygame import surfarray
|
|
|
|
main_dir = os.path.split(os.path.abspath(__file__))[0]
|
|
|
|
|
|
def surfdemo_show(array_img, name):
|
|
"displays a surface, waits for user to continue"
|
|
screen = pg.display.set_mode(array_img.shape[:2], 0, 32)
|
|
surfarray.blit_array(screen, array_img)
|
|
pg.display.flip()
|
|
pg.display.set_caption(name)
|
|
while 1:
|
|
e = pg.event.wait()
|
|
if e.type == pg.MOUSEBUTTONDOWN:
|
|
break
|
|
elif e.type == pg.KEYDOWN and e.key == pg.K_s:
|
|
# pg.image.save(screen, name+'.bmp')
|
|
# s = pg.Surface(screen.get_size(), 0, 32)
|
|
# s = s.convert_alpha()
|
|
# s.fill((0,0,0,255))
|
|
# s.blit(screen, (0,0))
|
|
# s.fill((222,0,0,50), (0,0,40,40))
|
|
# pg.image.save_extended(s, name+'.png')
|
|
# pg.image.save(s, name+'.png')
|
|
# pg.image.save(screen, name+'_screen.png')
|
|
# pg.image.save(s, name+'.tga')
|
|
pg.image.save(screen, name + ".png")
|
|
elif e.type == pg.QUIT:
|
|
pg.quit()
|
|
raise SystemExit()
|
|
|
|
|
|
def main():
|
|
"""show various surfarray effects"""
|
|
import numpy as N
|
|
from numpy import int32, uint8, uint
|
|
|
|
pg.init()
|
|
print("Using %s" % surfarray.get_arraytype().capitalize())
|
|
print("Press the mouse button to advance image.")
|
|
print('Press the "s" key to save the current image.')
|
|
|
|
# allblack
|
|
allblack = N.zeros((128, 128), int32)
|
|
surfdemo_show(allblack, "allblack")
|
|
|
|
# striped
|
|
# the element type is required for N.zeros in numpy else
|
|
# an array of float is returned.
|
|
striped = N.zeros((128, 128, 3), int32)
|
|
striped[:] = (255, 0, 0)
|
|
striped[:, ::3] = (0, 255, 255)
|
|
surfdemo_show(striped, "striped")
|
|
|
|
# rgbarray
|
|
imagename = os.path.join(main_dir, "data", "arraydemo.bmp")
|
|
imgsurface = pg.image.load(imagename)
|
|
rgbarray = surfarray.array3d(imgsurface)
|
|
surfdemo_show(rgbarray, "rgbarray")
|
|
|
|
# flipped
|
|
flipped = rgbarray[:, ::-1]
|
|
surfdemo_show(flipped, "flipped")
|
|
|
|
# scaledown
|
|
scaledown = rgbarray[::2, ::2]
|
|
surfdemo_show(scaledown, "scaledown")
|
|
|
|
# scaleup
|
|
# the element type is required for N.zeros in numpy else
|
|
# an #array of floats is returned.
|
|
shape = rgbarray.shape
|
|
scaleup = N.zeros((shape[0] * 2, shape[1] * 2, shape[2]), int32)
|
|
scaleup[::2, ::2, :] = rgbarray
|
|
scaleup[1::2, ::2, :] = rgbarray
|
|
scaleup[:, 1::2] = scaleup[:, ::2]
|
|
surfdemo_show(scaleup, "scaleup")
|
|
|
|
# redimg
|
|
redimg = N.array(rgbarray)
|
|
redimg[:, :, 1:] = 0
|
|
surfdemo_show(redimg, "redimg")
|
|
|
|
# soften
|
|
# having factor as an array forces integer upgrade during multiplication
|
|
# of rgbarray, even for numpy.
|
|
factor = N.array((8,), int32)
|
|
soften = N.array(rgbarray, int32)
|
|
soften[1:, :] += rgbarray[:-1, :] * factor
|
|
soften[:-1, :] += rgbarray[1:, :] * factor
|
|
soften[:, 1:] += rgbarray[:, :-1] * factor
|
|
soften[:, :-1] += rgbarray[:, 1:] * factor
|
|
soften //= 33
|
|
surfdemo_show(soften, "soften")
|
|
|
|
# crossfade (50%)
|
|
src = N.array(rgbarray)
|
|
dest = N.zeros(rgbarray.shape) # dest is float64 by default.
|
|
dest[:] = 20, 50, 100
|
|
diff = (dest - src) * 0.50
|
|
xfade = src + diff.astype(uint)
|
|
surfdemo_show(xfade, "xfade")
|
|
|
|
# alldone
|
|
pg.quit()
|
|
|
|
|
|
if __name__ == "__main__":
|
|
main()
|