1 # -*- coding: utf-8 -*-
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3 bmp.py - module for constructing simple BMP graphics files
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5 Permission is hereby granted, free of charge, to any person obtaining
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6 a copy of this software and associated documentation files (the
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7 "Software"), to deal in the Software without restriction, including
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8 without limitation the rights to use, copy, modify, merge, publish,
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9 distribute, sublicense, and/or sell copies of the Software, and to
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10 permit persons to whom the Software is furnished to do so, subject to
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11 the following conditions:
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13 The above copyright notice and this permission notice shall be
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14 included in all copies or substantial portions of the Software.
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16 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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17 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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18 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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19 IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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20 CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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21 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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22 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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26 __about = "bmp module, version %s, written by Paul McGuire, October, 2003, updated by Margus Laak, September, 2009" % __version__
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28 from math import ceil, hypot
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31 def shortToString(i):
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32 hi = (i & 0xff00) >> 8
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34 return chr(lo) + chr(hi)
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36 def longToString(i):
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37 hi = (long(i) & 0x7fff0000) >> 16
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38 lo = long(i) & 0x0000ffff
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39 return shortToString(lo) + shortToString(hi)
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41 def long24ToString(i):
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42 return chr(i & 0xff) + chr(i >> 8 & 0xff) + chr(i >> 16 & 0xff)
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44 def stringToLong(input_string, offset):
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45 return ord(input_string[offset+3]) << 24 | ord(input_string[offset+2]) << 16 | ord(input_string[offset+1]) << 8 | ord(input_string[offset])
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47 def stringToLong24(input_string, offset):
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48 return ord(input_string[offset+2]) << 16 | ord(input_string[offset+1]) << 8 | ord(input_string[offset])
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50 class Color(object):
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51 """class for specifying colors while drawing BitMap elements"""
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52 __slots__ = [ 'red', 'grn', 'blu' ]
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55 def __init__( self, r=0, g=0, b=0 ):
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60 def __setattr__(self, name, value):
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61 if hasattr(self, name):
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62 raise AttributeError, "Color is immutable"
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64 object.__setattr__(self, name, value)
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66 def __str__( self ):
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67 return "R:%d G:%d B:%d" % (self.red, self.grn, self.blu )
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69 def __hash__( self ):
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70 return ( ( long(self.blu) ) +
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71 ( long(self.grn) << 8 ) +
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72 ( long(self.red) << 16 ) )
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74 def __eq__( self, other ):
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75 return (self is other) or (self.toLong == other.toLong)
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77 def lighten( self ):
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79 min( self.red + Color.__shade, 255),
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80 min( self.grn + Color.__shade, 255),
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81 min( self.blu + Color.__shade, 255)
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86 max( self.red - Color.__shade, 0),
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87 max( self.grn - Color.__shade, 0),
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88 max( self.blu - Color.__shade, 0)
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92 return self.__hash__()
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100 return Color( r, g, b )
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101 fromLong = staticmethod(fromLong)
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103 # define class constants for common colors
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104 Color.BLACK = Color( 0, 0, 0 )
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105 Color.RED = Color( 255, 0, 0 )
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106 Color.GREEN = Color( 0, 255, 0 )
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107 Color.BLUE = Color( 0, 0, 255 )
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108 Color.CYAN = Color( 0, 255, 255 )
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109 Color.MAGENTA = Color( 255, 0, 255 )
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110 Color.YELLOW = Color( 255, 255, 0 )
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111 Color.WHITE = Color( 255, 255, 255 )
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112 Color.DKRED = Color( 128, 0, 0 )
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113 Color.DKGREEN = Color( 0, 128, 0 )
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114 Color.DKBLUE = Color( 0, 0, 128 )
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115 Color.TEAL = Color( 0, 128, 128 )
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116 Color.PURPLE = Color( 128, 0, 128 )
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117 Color.BROWN = Color( 128, 128, 0 )
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118 Color.GRAY = Color( 128, 128, 128 )
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121 class BitMap(object):
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122 """class for drawing and saving simple Windows bitmap files"""
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130 _DOT_DASH_LEN = _DOT_LEN + _DASH_LEN
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132 def __init__( self, width, height,
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133 bkgd = Color.WHITE, frgd = Color.BLACK ):
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134 self.wd = int( ceil(width) )
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135 self.ht = int( ceil(height) )
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139 self.palette.append( bkgd.toLong() )
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140 self.palette.append( frgd.toLong() )
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141 self.currentPen = self.fgcolor
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143 tmparray = [ self.bgcolor ] * self.wd
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144 self.bitarray = [ tmparray[:] for i in range( self.ht ) ]
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145 self.currentPen = 1
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148 def plotPoint( self, x, y ):
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149 if ( 0 <= x < self.wd and 0 <= y < self.ht ):
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152 self.bitarray[y][x] = self.currentPen
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155 def _saveBitMapNoCompression( self ):
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156 line_padding = (4 - (self.wd % 4)) % 4
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158 # write bitmap header
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160 _bitmap += longToString( 54 + self.ht*(self.wd*3 + line_padding) ) # DWORD size in bytes of the file
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161 _bitmap += longToString( 0 ) # DWORD 0
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162 _bitmap += longToString( 54 )
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163 _bitmap += longToString( 40 ) # DWORD header size = 40
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164 _bitmap += longToString( self.wd ) # DWORD image width
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165 _bitmap += longToString( self.ht ) # DWORD image height
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166 _bitmap += shortToString( 1 ) # WORD planes = 1
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167 _bitmap += shortToString( 24 ) # WORD bits per pixel = 8
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168 _bitmap += longToString( 0 ) # DWORD compression = 0
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169 _bitmap += longToString( self.ht * (self.wd * 3 + line_padding) ) # DWORD sizeimage = size in bytes of the bitmap = width * height
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170 _bitmap += longToString( 0 ) # DWORD horiz pixels per meter (?)
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171 _bitmap += longToString( 0 ) # DWORD ver pixels per meter (?)
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172 _bitmap += longToString( 0 ) # DWORD number of colors used = 256
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173 _bitmap += longToString( 0 ) # DWORD number of "import colors = len( self.palette )
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176 self.bitarray.reverse()
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177 for row in self.bitarray:
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179 c = self.palette[pixel]
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180 _bitmap += long24ToString(c)
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181 for i in range(line_padding):
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182 _bitmap += chr( 0 )
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188 def saveFile( self, filename):
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189 _b = self._saveBitMapNoCompression( )
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191 f = file(filename, 'wb')
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196 def save_qrcode(qr, filename):
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197 matrix = qr.get_matrix()
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199 bitmap = BitMap( (k+2)*8, (k+2)*8 )
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200 bitmap.bitarray = []
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201 for r in range(k+2):
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202 tmparray = [ 0 ] * (k+2)*8
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207 tmparray[ (1+c)*8:(2+c)*8] = [1]*8
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210 bitmap.bitarray.append( tmparray[:] )
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212 bitmap.saveFile( filename )
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216 if __name__ == "__main__":
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218 bmp = BitMap( 10, 10 )
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219 bmp.plotPoint( 5, 5 )
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220 bmp.plotPoint( 0, 0 )
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221 bmp.saveFile( "test.bmp" )
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