124 lines
3.2 KiB
Python
124 lines
3.2 KiB
Python
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#!/usr/bin/env python
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import os, pygame
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from pygame.compat import xrange_
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main_dir = os.path.split(os.path.abspath(__file__))[0]
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data_dir = os.path.join(main_dir, 'data')
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def show (image):
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screen = pygame.display.get_surface()
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screen.fill ((255, 255, 255))
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screen.blit (image, (0, 0))
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pygame.display.flip ()
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while 1:
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event = pygame.event.wait ()
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if event.type == pygame.QUIT:
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raise SystemExit
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if event.type == pygame.MOUSEBUTTONDOWN:
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break
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def main():
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pygame.init ()
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pygame.display.set_mode ((255, 255))
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surface = pygame.Surface ((255, 255))
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pygame.display.flip ()
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# Create the PixelArray.
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ar = pygame.PixelArray (surface)
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r, g, b = 0, 0, 0
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# Do some easy gradient effect.
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for y in xrange_ (255):
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r, g, b = y, y, y
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ar[:,y] = (r, g, b)
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del ar
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show (surface)
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# We have made some gradient effect, now flip it.
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ar = pygame.PixelArray (surface)
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ar[:] = ar[:,::-1]
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del ar
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show (surface)
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# Every second column will be made blue
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ar = pygame.PixelArray (surface)
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ar[::2] = (0, 0, 255)
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del ar
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show (surface)
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# Every second row will be made green
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ar = pygame.PixelArray (surface)
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ar[:,::2] = (0, 255, 0)
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del ar
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show (surface)
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# Manipulate the image. Flip it around the y axis.
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surface = pygame.image.load (os.path.join (data_dir, 'arraydemo.bmp'))
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ar = pygame.PixelArray (surface)
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ar[:] = ar[:,::-1]
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del ar
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show (surface)
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# Flip the image around the x axis.
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ar = pygame.PixelArray (surface)
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ar[:] = ar[::-1,:]
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del ar
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show (surface)
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# Every second column will be made white.
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ar = pygame.PixelArray (surface)
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ar[::2] = (255, 255, 255)
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del ar
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show (surface)
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# Flip the image around both axes, restoring it's original layout.
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ar = pygame.PixelArray (surface)
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ar[:] = ar[::-1,::-1]
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del ar
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show (surface)
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# Rotate 90 degrees clockwise.
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w, h = surface.get_size ()
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surface2 = pygame.Surface ((h, w), surface.get_flags (), surface)
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ar = pygame.PixelArray (surface)
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ar2 = pygame.PixelArray (surface2)
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ar2[...] = ar.transpose ()[::-1,:]
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del ar, ar2
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show (surface2)
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# Scale it by throwing each second pixel away.
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surface = pygame.image.load (os.path.join (data_dir, 'arraydemo.bmp'))
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ar = pygame.PixelArray (surface)
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sf2 = ar[::2,::2].make_surface ()
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del ar
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show (sf2)
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# Replace anything looking like the blue color from the text.
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ar = pygame.PixelArray (surface)
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ar.replace ((60, 60, 255), (0, 255, 0), 0.06)
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del ar
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show (surface)
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# Extract anything which might be somewhat black.
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surface = pygame.image.load (os.path.join (data_dir, 'arraydemo.bmp'))
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ar = pygame.PixelArray (surface)
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ar2 = ar.extract ((0, 0, 0), 0.07)
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sf2 = ar2.surface
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del ar, ar2
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show (sf2)
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# Compare two images.
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surface = pygame.image.load (os.path.join (data_dir, 'alien1.gif'))
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surface2 = pygame.image.load (os.path.join (data_dir, 'alien2.gif'))
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ar1 = pygame.PixelArray (surface)
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ar2 = pygame.PixelArray (surface2)
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ar3 = ar1.compare (ar2, 0.07)
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sf3 = ar3.surface
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del ar1, ar2, ar3
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show (sf3)
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if __name__ == '__main__':
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main()
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