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import math |
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import struct |
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import re |
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import six as sm |
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from operator import itemgetter |
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6
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def convertComponent(expo, val): |
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v = val / 256.0 |
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d = math.pow(2, expo) |
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return v * d |
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def getValueFromStream(FILE): |
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return ord(FILE.read(1)) |
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class HDR(object): |
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def __init__(self): |
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self.width = 0 |
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self.height = 0 |
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self.cols = [] |
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class HDRLoader(object): |
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def __init__(self): |
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self.R = 0 |
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self.G = 1 |
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self.B = 2 |
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self.E = 3 |
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# Mininum scanline length for encoding |
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self.MINELEN = 8 |
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# Maximum scanline length for encoding |
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self.MAXELEN = 0x7fff |
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self.RGBE = [-1, -1, -1, -1] |
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# Store the scanline stuff here |
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self.scanline = None |
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def workOnRGBE(self, hdrFILE, length): |
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scanIndex = 0 |
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while length > 0: |
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expo = self.scanline[scanIndex][self.E] - 128 |
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hdrFILE.cols.append(convertComponent(expo, self.scanline[scanIndex][self.R])) |
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hdrFILE.cols.append(convertComponent(expo, self.scanline[scanIndex][self.G])) |
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hdrFILE.cols.append(convertComponent(expo, self.scanline[scanIndex][self.B])) |
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scanIndex = scanIndex + 1 |
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length = length - 1 |
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def deCrunch(self, scanIndex1, length, FILE): |
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scanIndex = scanIndex1 |
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if length < self.MINELEN or length > self.MAXELEN: |
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return self.oldDeCrunch(scanIndex, length, FILE) |
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i = getValueFromStream(FILE) |
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if i is not 2: |
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# stuff about file parsing c style |
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FILE.seek(-1 ,1) |
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return self.oldDeCrunch(scanIndex, length, FILE) |
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self.scanline[scanIndex][self.G] = getValueFromStream(FILE) |
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self.scanline[scanIndex][self.B] = getValueFromStream(FILE) |
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i = getValueFromStream(FILE) |
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if self.scanline[scanIndex][self.G] is not 2 or self.scanline[scanIndex][self.B] & 128: |
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self.scanline[scanIndex][self.R] = 2 |
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self.scanline[scanIndex][self.E] = i |
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# The bug could be here |
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return self.oldDeCrunch(scanIndex, length - 1, FILE) |
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# Read each component |
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for i in range(4): |
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for j in range(length): |
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code = getValueFromStream(FILE) |
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# Run |
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if code > 128: |
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code &= 127 |
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val = getValueFromStream(FILE) |
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while code: |
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self.scanline[j][i] = val |
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code -= 1 |
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# Non-Run |
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else: |
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while code: |
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self.scanline[j][i] = getValueFromStream(FILE) |
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code -= 1 |
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if getValueFromStream(FILE) is None: |
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return False |
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def oldDeCrunch(self, scanIndex1, length, FILE): |
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scanIndex = scanIndex1 |
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rshift = 0 |
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while length > 0: |
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self.scanline[scanIndex][self.R] = getValueFromStream(FILE) |
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self.scanline[scanIndex][self.G] = getValueFromStream(FILE) |
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self.scanline[scanIndex][self.B] = getValueFromStream(FILE) |
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self.scanline[scanIndex][self.E] = getValueFromStream(FILE) |
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if (getValueFromStream(FILE) is None): |
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return False |
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107
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if (self.scanline[scanIndex][self.R] is 1 and self.scanline[scanIndex][self.G] is 1 and self.scanline[scanIndex][self.B] is 1): |
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for [] in range(self.scanline[scanIndex][self.E] << rshift, 0, -1): |
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self.scanline[scanIndex][0] = self.scanline[scanIndex - 1][0] |
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scanIndex = scanIndex + 1 |
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length = length - 1 |
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rshift += 8 |
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else: |
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scanIndex = scanIndex + 1 |
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length = length - 1 |
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rshift = 0 |
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return True |
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def load(self, fileName, hdrf): |
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f = open(fileName, 'rb') |
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strf = ''.join(struct.unpack('10s', f.read(10))) |
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if strf != '#?RADIANCE': |
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f.close() |
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return False |
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127
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f.seek(1, 1) |
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129
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cmd = [] |
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c = 0 |
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oldc = 0 |
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while True: |
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oldc = c |
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c = ord(f.read(1)) |
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if c is 0xa and oldc is 0xa: |
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break |
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cmd.append(str(sm.unichr(c))) |
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139
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reso = [] |
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while True: |
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c = ord(f.read(1)) |
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cstr = str(sm.unichr(c)) |
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reso.append(cstr) |
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if c is 0xa: |
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break |
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147
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resoStr = "".join(reso) |
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resoStrUnformat = re.match('\-Y (?P<_0>\d+) \+X (?P<_1>\d+)', resoStr) |
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(ws, hs) = map(itemgetter(1), sorted(resoStrUnformat.groupdict().items())) |
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w = int(ws) |
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h = int(hs) |
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154
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hdrf.width = w |
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hdrf.height = h |
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156
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157
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self.scanline = [[-1 for i in range(4)] for i in range(w)] |
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159
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if not self.scanline: |
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print("File closed because scanline not found.") |
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f.close() |
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return False |
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164
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scnidx = 0 |
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# Convert image |
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for [] in range(h - 1, -1, -1): |
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# If self.scanline doesn't update is because of this |
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if (self.deCrunch(scnidx, w, f) is False): |
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break |
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# This should update the cols array in hdrf which is the HDR Class. |
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# If hdrf.cols doesn't update is because of this |
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self.workOnRGBE(hdrf, w) |
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scnidx = scnidx + 1 |
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175
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f.close() |
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177
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178
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# myhdrtest = HDR() |
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# myhdrtestloader = HDRLoader() |
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180
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# filePath = files.resolve_path('data', 'images', "grace_probe.hdr") |
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# myhdrtestloader.load(filePath, myhdrtest) |
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# |
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183
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# print("HDR File Info") |
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184
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# print(myhdrtest.width, myhdrtest.height) |
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185
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# print("Size of the image: ", len(myhdrtest.cols)) |
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186
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# print("Random pixel", myhdrtest.cols[0], myhdrtest.cols[1], myhdrtest.cols[2]) |
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187
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188
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#for i in range(len(myhdrtest.cols) / 3): |
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# print(myhdrtest.cols[i], myhdrtest.cols[i + 1], myhdrtest.cols[i + 2]) |
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explosiveduck /
ed2d
