141 lines
4.6 KiB
Python
141 lines
4.6 KiB
Python
#!/usr/bin/env python
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import sys, time
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import pygame
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def main(imagefile, convert_alpha=False, run_speed_test=False):
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"""show an interactive image scaler
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Args:
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imagefile - name of source image (required)
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convert_alpha - use convert_alpha() on the surf (default False)
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run_speed_test - (default False)
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"""
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# initialize display
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pygame.display.init()
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# load background image
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background = pygame.image.load(imagefile)
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if run_speed_test:
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if convert_alpha:
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# convert_alpha() requires the display mode to be set
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pygame.display.set_mode((1, 1))
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background = background.convert_alpha()
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SpeedTest(background)
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return
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# start fullscreen mode
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screen = pygame.display.set_mode((1024, 768), pygame.FULLSCREEN)
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if convert_alpha:
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background = background.convert_alpha()
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# turn off the mouse pointer
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pygame.mouse.set_visible(0)
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# main loop
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bRunning = True
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bUp = False
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bDown = False
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bLeft = False
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bRight = False
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cursize = [background.get_width(), background.get_height()]
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while(bRunning):
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image = pygame.transform.smoothscale(background, cursize)
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imgpos = image.get_rect(centerx=512, centery=384)
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screen.fill((255,255,255))
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screen.blit(image, imgpos)
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pygame.display.flip()
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for event in pygame.event.get():
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if event.type == pygame.QUIT or (event.type == pygame.KEYDOWN and event.key == pygame.K_ESCAPE):
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bRunning = False
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if event.type == pygame.KEYDOWN:
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if event.key == pygame.K_UP: bUp = True
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if event.key == pygame.K_DOWN: bDown = True
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if event.key == pygame.K_LEFT: bLeft = True
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if event.key == pygame.K_RIGHT: bRight = True
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if event.type == pygame.KEYUP:
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if event.key == pygame.K_UP: bUp = False
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if event.key == pygame.K_DOWN: bDown = False
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if event.key == pygame.K_LEFT: bLeft = False
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if event.key == pygame.K_RIGHT: bRight = False
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if bUp:
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cursize[1] -= 2
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if cursize[1] < 1: cursize[1] = 1
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if bDown:
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cursize[1] += 2
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if bLeft:
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cursize[0] -= 2
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if cursize[0] < 1: cursize[0] = 1
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if bRight:
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cursize[0] += 2
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def SpeedTest(image):
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print("\nImage Scaling Speed Test - Image Size %s\n" % str(
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image.get_size()))
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imgsize = [image.get_width(), image.get_height()]
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duration = 0.0
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for i in range(128):
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shrinkx = (imgsize[0] * i) // 128
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shrinky = (imgsize[1] * i) // 128
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start = time.time()
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tempimg = pygame.transform.smoothscale(image, (shrinkx, shrinky))
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duration += (time.time() - start)
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del tempimg
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print("Average transform.smoothscale shrink time: %.4f ms." % (
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duration / 128 * 1000))
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duration = 0
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for i in range(128):
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expandx = (imgsize[0] * (i + 129)) // 128
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expandy = (imgsize[1] * (i + 129)) // 128
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start = time.time()
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tempimg = pygame.transform.smoothscale(image, (expandx, expandy))
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duration += (time.time() - start)
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del tempimg
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print("Average transform.smoothscale expand time: %.4f ms." % (
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duration / 128 * 1000))
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duration = 0.0
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for i in range(128):
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shrinkx = (imgsize[0] * i) // 128
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shrinky = (imgsize[1] * i) // 128
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start = time.time()
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tempimg = pygame.transform.scale(image, (shrinkx, shrinky))
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duration += (time.time() - start)
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del tempimg
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print("Average transform.scale shrink time: %.4f ms." % (
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duration / 128 * 1000))
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duration = 0
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for i in range(128):
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expandx = (imgsize[0] * (i + 129)) // 128
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expandy = (imgsize[1] * (i + 129)) // 128
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start = time.time()
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tempimg = pygame.transform.scale(image, (expandx, expandy))
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duration += (time.time() - start)
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del tempimg
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print("Average transform.scale expand time: %.4f ms." % (
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duration / 128 * 1000))
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if __name__ == '__main__':
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# check input parameters
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if len(sys.argv) < 2:
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print("\nUsage: %s imagefile [-t] [-convert_alpha]" % sys.argv[0])
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print(" imagefile image filename (required)")
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print(" -t run speed test")
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print(" -convert_alpha use convert_alpha() on the image's "
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"surface\n")
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else:
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main(sys.argv[1],
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convert_alpha = '-convert_alpha' in sys.argv,
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run_speed_test = '-t' in sys.argv)
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