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1 #!/usr/bin/env python3
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2 # -*- coding: utf-8 -*-
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3 # should honor GDALBIN, if set, else use PATH
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4 # https://opengislab.com/blog/2016/4/2/usgs-geopdf-to-geotif-with-gdal
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5 # gdalinfo -json -mdd LAYERS gunk.pdf
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6 # build list of all non-Map.Frame.* layers
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7 # to that add Map_Frame.Projection_and_Grids
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8 # First:
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9 # gdal_translate gunk.pdf /tmp/xxxxx.tif -of GTiff --config GDAL_PDF_LAYERS_OFF Map_Collar,Map_Frame.Projections_and_Grids,Map_Frame.Terrain.Shaded_Relief,Images.Orthoimage --config GDAL_PDF_DPI 300
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10 # Then:
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11 # gdal_translate /tmp/xxxxx.tif gunk.tif -of GTiff -srcwin xoff yoff xsize ysize
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12 # Need to filter out all errors containing: insufficient arguments for Marked Content
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13 # also fiter out: More than 1000 errors or warnings have been reported. No more will be reported from now.
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14
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15 # I m p o r t s
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16
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17 import os, sys
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18 import argparse
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19 import json
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20 import subprocess, shutil
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21 import locale
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22 from abc import abstractmethod
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23 from enum import IntEnum
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24 from tempfile import TemporaryDirectory
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25
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26 # PIL is ...weird... and needs both of these.
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27 import PIL
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28 from PIL import Image
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29
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30 # V a r i a b l e s
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31
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32 MYNAME = os.path.basename(sys.argv[0])
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33 estat = 0
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34 ENCODING = "UTF-8"
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35 ENVIRON = os.environ.copy()
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36 for k in ENVIRON.keys():
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37 if k.startswith("LC_"): del(ENVIRON[k])
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38 ENVIRON["LANG"] = ENVIRON["LC_ALL"] = "C." + ENCODING
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39
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40 # C l a s s e s
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41
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42 # A horizontal or vertical strip of an image. Assumes RGB images with 8-bit
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43 # color.
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44 class Strip:
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45 def __init__(self, based_on, index):
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46 if not isinstance(based_on, PIL.Image.Image):
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47 raise TypeError("Expecting RGB PIL.Image object for based_on.")
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48 if based_on.mode != "RGB":
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49 raise ValueError("Expecting RGB PIL.Image object for based_on.")
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50 self._index = index
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51 self._based_on = based_on
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52
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53 @property
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54 def index(self):
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55 return self._index
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56
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57 @abstractmethod
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58 def __len__(self):
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59 pass
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60
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61 @abstractmethod
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62 def __getitem__(self, key):
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63 pass
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64
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65 @abstractmethod
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66 def __setitem__(self, key, value):
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67 pass
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68
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69 def is_all_white(self):
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70 for i in range(len(self)):
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71 if self[i] != (255, 255, 255):
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72 return False
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73 return True
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74
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75 # A horizontal strip of an image.
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76 class Row(Strip):
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77 def __len__(self):
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78 return self._based_on.width
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79
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80 def __getitem__(self, key):
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81 return self._based_on.getpixel((key, self._index))
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82
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83 def __setitem__(self, key, value):
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84 self._based_on.setpixel((key, self._index), value)
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85
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86 # A vertical strip of an image.
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87 class Column(Strip):
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88 def __len__(self):
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89 return self._based_on.height
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90
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91 def __getitem__(self, key):
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92 return self._based_on.getpixel((self._index, key))
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93
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94 def __setitem__(self, key, value):
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95 self._based_on.setpixel((self._index, key), value)
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96
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97 # A direction in which to search.
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98 class Direction(IntEnum):
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99 DESCENDING = -1
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100 ASCENDING = 1
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101
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102 # An orientation in which to search.
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103 class Orientation(IntEnum):
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104 VERTICAL = 0
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105 HORIZONTAL = 1
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106
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107 class TopoTilerException(Exception):
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108 pass
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109
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110 # F u n c t i o n s
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111
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112 def find_edge(image, orientation, direction):
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113 """
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114 Find an edge in an image with a white border.
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115 """
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116 if orientation == Orientation.VERTICAL:
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117 what = "column"
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118 strip = Column
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119 maxn = image.width - 1
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120 else:
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121 what = "row"
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122 strip = Row
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123 maxn = image.height - 1
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124 # Establish outer bound and sanity-check it.
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125 outer = 0 if direction == Direction.ASCENDING else maxn
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126 if not strip(image, outer).is_all_white():
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127 raise TopoTilerException("Unexpected nonwhite edge ({0} = {1})!".format(what, outer))
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128 # Establish inner bound and sanity-check it.
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129 inner = outer + direction * maxn // 4
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130 if strip(image, inner).is_all_white():
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131 raise TopoTilerException("Unexpected white strip ({0} = {1})!".format(what, inner))
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132 while abs(outer - inner) > 1:
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133 new = (outer + inner) // 2
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134 if strip(image, new).is_all_white():
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135 outer = new
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136 else:
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137 inner = new
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138 return inner
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139
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140 def positive_int(string):
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141 """
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142 Specify a positive integer argument.
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143 """
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144 try:
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145 ret = int(string)
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146 except ValueError as e:
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147 raise argparse.ArgumentTypeError(e.message)
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148 if ret <= 0:
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149 raise argparse.ArgumentTypeError("%r is 0 or negative" % string)
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150 return ret
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151
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152 def gdalcmd(command, *args):
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153 """
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154 Build gdal command vector for subprocess.Popen
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155 """
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156 # print('$', command, ' '.join(args)) # debug
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157 gdalbin = os.environ.get("GDALBIN")
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158 cmd = shutil.which(command) if gdalbin is None else os.path.join(gdalbin, command)
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159 ret = list(args)
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160 ret.insert(0, cmd)
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161 return ret
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162
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163 _MUZZLE = [
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164 "insufficient arguments for Marked Content",
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165 "More than 1000 errors or warnings have been reported."
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166 ]
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167 def drainout(stream):
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168 """
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169 Drain an output/error stream, muzzling the meaningless babble.
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170 """
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171 for line in stream:
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172 printit = True
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173 for m in _MUZZLE:
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174 if m in line:
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175 printit = False
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176 break
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177 if printit:
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178 sys.stderr.write(line)
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179
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180 def waitfor(proc):
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181 global estat
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182 command_name = os.path.basename(proc.args[0])
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183 status = proc.wait()
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184 if status < 0:
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185 sys.stderr.write("{0}: {1} killed by signal {2}\n".format(MYNAME, command_name, -status))
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186 estat = 1
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187 elif status > 0:
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188 sys.stderr.write("{0}: {1} exited with status {2}\n".format(MYNAME, command_name, status))
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189 estat = 1
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190
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191 _BLACKLIST = set(["Map_Frame.Projection_and_Grids", "Map_Frame.Terrain.Shaded_Relief"])
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192 def get_default_layers(name):
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193 """
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194 Given a file, analyze it, and get the list of layers to not include
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195 when rendering it.
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196 """
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197 proc = subprocess.Popen(
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198 gdalcmd("gdalinfo", "-json", "-mdd", "LAYERS", name),
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199 stdout=subprocess.PIPE, stderr=sys.stderr, env=ENVIRON, encoding=ENCODING)
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200 data = json.load(proc.stdout)
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201 waitfor(proc)
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202 layers = set(["Map_Frame"])
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203 for layer in data["metadata"]["LAYERS"].values():
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204 if layer.startswith("Map_Frame.") and layer not in _BLACKLIST:
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205 layers.add(layer)
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206 return ",".join(layers)
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207
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208 # M a i n P r o g r a m
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209
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210 # Parse command-line arguments.
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211 parser = argparse.ArgumentParser(description='Render GeoPDF into GeoTIFF suitable for tiling.')
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212 parser.add_argument('--layers', '-l', type=str,
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213 help='List of layers to include (see documentation for default).')
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214 parser.add_argument('--resolution', '-r', type=positive_int, default=300,
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215 help='Resolution to render at in DPI.')
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216 parser.add_argument('file', nargs=1,
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217 help='File to read (must be a GeoPDF).')
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218 try:
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219 args = parser.parse_args()
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220 except SystemExit:
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221 sys.exit(2)
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222
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223 # File must end with '.pdf' (case insensitive), or else!
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224 if not isinstance(args.file, str):
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225 # How silly, it gave us a list or a tuple, despite only one of them!
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226 args.file = args.file[0]
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227 if not args.file.lower().endswith('.pdf'):
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228 sys.steder.write("{0}: input file must end with .pdf (case insensitive)\n".format(MYNAME))
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229
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230 # Default the set of layers to delete, if necessary
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231 if args.layers is None:
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232 args.layers = get_default_layers(args.file)
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233
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234 with TemporaryDirectory() as td:
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235 # Get scratch file name. This goes under TMPDIR; if the default temporary
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236 # area is too small, set that environment variable accordingly!
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237 tf = os.path.join(td, "temp.tiff")
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238
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239 # Render. The result will have undesired margins.
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240 sys.stdout.write("Rendering (may take a while)...\n")
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241 sys.stdout.flush()
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242 proc = subprocess.Popen(
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243 gdalcmd("gdal_translate", "-q", args.file, tf, "-of", "GTiff", "--config", "GDAL_PDF_LAYERS", args.layers, "--config", "GDAL_PDF_DPI", str(args.resolution)),
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244 stdout=subprocess.DEVNULL, stderr=subprocess.PIPE, env=ENVIRON, encoding=ENCODING)
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245 drainout(proc.stderr)
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246 waitfor(proc)
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247 sys.stdout.write("Done!\n")
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248
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249 # Determine crop marquee.
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250 with Image.open(tf) as im:
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251 minx = find_edge(im, Orientation.VERTICAL, Direction.ASCENDING)
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252 maxx = find_edge(im, Orientation.VERTICAL, Direction.DESCENDING)
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253 miny = find_edge(im, Orientation.HORIZONTAL, Direction.ASCENDING)
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254 maxy = find_edge(im, Orientation.HORIZONTAL, Direction.DESCENDING)
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255
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256 # Determine output file name.
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257 outf = os.path.splitext(args.file)[0] + ".tiff"
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258
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259 # Crop.
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260 proc = subprocess.Popen(
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261 gdalcmd("gdal_translate", "-q", tf, outf, "-of", "GTiff", "-srcwin", str(minx), str(miny), str(maxx-minx+1), str(maxy-miny+1)),
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262 stdout=subprocess.DEVNULL, stderr=sys.stderr)
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263 waitfor(proc)
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264
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265 # AMF...
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266 sys.exit(estat)
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