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annotate examples/arraydemo.py @ 3194:9fcb7abf3185 default tip

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Remove some gcc 4.7.2 compiler warnings
author Lenard Lindstrom <len-l@telus.net>
date Tue, 23 Apr 2013 19:53:36 -0700
parents 27991588198b
children
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1 #!/usr/bin/env python
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2
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3 import sys
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4 import os
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5 try:
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6 import pygame
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7 from pygame import surfarray
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8 from pygame.locals import *
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9 except ImportError:
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10 raise ImportError('Error Importing Pygame/surfarray')
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11
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12 main_dir = os.path.split(os.path.abspath(__file__))[0]
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13
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14 def main(arraytype=None):
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15 """show various surfarray effects
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16
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17 If arraytype is provided then use that array package. Valid
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18 values are 'numeric' or 'numpy'. Otherwise default to NumPy,
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19 or fall back on Numeric if NumPy is not installed.
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20
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21 """
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22
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23 if arraytype is None:
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24 if 'numpy' in surfarray.get_arraytypes():
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25 surfarray.use_arraytype('numpy')
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26 elif 'numeric' in surfarray.get_arraytype():
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27 surfarray.use_arraytype('numeric')
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28 else:
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29 raise ImportError('No array package is installed')
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30 else:
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31 surfarray.use_arraytype(arraytype)
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32
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33 if surfarray.get_arraytype() == 'numpy':
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34 import numpy as N
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35 from numpy import int32, uint8, uint
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36 else:
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37 import Numeric as N
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38 from Numeric import Int32 as int32, UInt8 as uint8, UInt as uint
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39
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40 pygame.init()
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41 print ('Using %s' % surfarray.get_arraytype().capitalize())
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42 print ('Press the mouse button to advance image.')
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43 print ('Press the "s" key to save the current image.')
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45 def surfdemo_show(array_img, name):
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46 "displays a surface, waits for user to continue"
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47 screen = pygame.display.set_mode(array_img.shape[:2], 0, 32)
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48 surfarray.blit_array(screen, array_img)
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49 pygame.display.flip()
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50 pygame.display.set_caption(name)
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51 while 1:
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52 e = pygame.event.wait()
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53 if e.type == MOUSEBUTTONDOWN: break
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54 elif e.type == KEYDOWN and e.key == K_s:
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55 #pygame.image.save(screen, name+'.bmp')
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56 #s = pygame.Surface(screen.get_size(), 0, 32)
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57 #s = s.convert_alpha()
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58 #s.fill((0,0,0,255))
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59 #s.blit(screen, (0,0))
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60 #s.fill((222,0,0,50), (0,0,40,40))
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61 #pygame.image.save_extended(s, name+'.png')
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62 #pygame.image.save(s, name+'.png')
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63 #pygame.image.save(screen, name+'_screen.png')
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64 #pygame.image.save(s, name+'.tga')
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65 pygame.image.save(screen, name+'.png')
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66 elif e.type == QUIT:
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67 raise SystemExit()
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68
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69 #allblack
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70 allblack = N.zeros((128, 128), int32)
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71 surfdemo_show(allblack, 'allblack')
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73
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74 #striped
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75 #the element type is required for N.zeros in NumPy else
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76 #an array of float is returned.
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77 striped = N.zeros((128, 128, 3), int32)
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78 striped[:] = (255, 0, 0)
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79 striped[:,::3] = (0, 255, 255)
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80 surfdemo_show(striped, 'striped')
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82
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83 #imgarray
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84 imagename = os.path.join(main_dir, 'data', 'arraydemo.bmp')
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85 imgsurface = pygame.image.load(imagename)
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86 imgarray = surfarray.array2d(imgsurface)
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87 surfdemo_show(imgarray, 'imgarray')
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89
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90 #flipped
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91 flipped = imgarray[:,::-1]
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92 surfdemo_show(flipped, 'flipped')
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94
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95 #scaledown
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96 scaledown = imgarray[::2,::2]
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97 surfdemo_show(scaledown, 'scaledown')
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99
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100 #scaleup
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101 #the element type is required for N.zeros in NumPy else
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102 #an #array of floats is returned.
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103 size = N.array(imgarray.shape)*2
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104 scaleup = N.zeros(size, int32)
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105 scaleup[::2,::2] = imgarray
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106 scaleup[1::2,::2] = imgarray
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107 scaleup[:,1::2] = scaleup[:,::2]
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108 surfdemo_show(scaleup, 'scaleup')
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111 #redimg
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112 rgbarray = surfarray.array3d(imgsurface)
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113 redimg = N.array(rgbarray)
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114 redimg[:,:,1:] = 0
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115 surfdemo_show(redimg, 'redimg')
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117
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118 #soften
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119 #having factor as an array forces integer upgrade during multiplication
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120 #of rgbarray, even for numpy.
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121 factor = N.array((8,), int32)
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122 soften = N.array(rgbarray, int32)
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123 soften[1:,:] += rgbarray[:-1,:] * factor
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124 soften[:-1,:] += rgbarray[1:,:] * factor
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125 soften[:,1:] += rgbarray[:,:-1] * factor
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126 soften[:,:-1] += rgbarray[:,1:] * factor
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127 soften //= 33
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128 surfdemo_show(soften, 'soften')
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130
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131 #crossfade (50%)
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132 src = N.array(rgbarray)
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133 dest = N.zeros(rgbarray.shape)
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134 dest[:] = 20, 50, 100
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135 diff = (dest - src) * 0.50
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136 xfade = src + diff.astype(uint)
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137 surfdemo_show(xfade, 'xfade')
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142 #alldone
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143 pygame.quit()
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144
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145 def usage():
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146 print ("Usage: command line option [--numpy|--numeric]")
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147 print (" The default is to use NumPy if installed,")
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148 print (" otherwise Numeric")
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149
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150 if __name__ == '__main__':
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151 if len(sys.argv) == 2:
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152 if '--numpy' in sys.argv:
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153 main('numpy')
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154 elif '--numeric' in sys.argv:
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155 main('numeric')
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156 else:
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157 usage()
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158 elif len(sys.argv) == 1:
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159 main()
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160 else:
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161 usage()
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162
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