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Date: Thu, 5 Apr 2007 17:07:58 +0100
From: "mark meijer" <mtlmeijer@gmail.com>
To: tiff@lists.maptools.org
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Subject: [Tiff] Floating point RGBA
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I have a file I want to read.
I have tried opening using devIL, which uses libTiff but returns
IL_LIB_TIFF_ERROR.
It opens fine in Photoshop but it seems floating point isn't fully supported
in libTiff?

thanks for any insight,



Some info on the file..

C:\temp\tiff-3.8.2-1-bin\bin>tiffinfo ConvenienceStoreFloor_1a_shape.tif
TIFF Directory at offset 0xa (10)
  Subfile Type: (0 = 0x0)
  Image Width: 256 Image Length: 256
  Resolution: 72, 72
  Bits/Sample: 32
  Sample Format: IEEE floating point
  Compression Scheme: PackBits
  Photometric Interpretation: RGB color
  Extra Samples: 1<assoc-alpha>
  Samples/Pixel: 4
  Rows/Strip: 256
  Planar Configuration: single image plane


SubFileType (1 Long): Zero
ImageWidth (1 Long): 256
ImageLength (1 Long): 256
BitsPerSample (4 Short): 32, 32, 32, 32
Compression (1 Short): PackBits (aka Macintosh RLE)
Photometric (1 Short): RGB
StripOffsets (1 Long): 252
SamplesPerPixel (1 Short): 4
RowsPerStrip (1 Long): 256
StripByteCounts (1 Long): 700221
XResolution (1 Rational): 72
YResolution (1 Rational): 72
PlanarConfig (1 Short): Contig
ExtraSamples (1 Short): 1
SampleFormat (4 Short): 3, 3, 3, 3

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<br>I have a file I want to read.<br>I have tried opening using devIL, which uses libTiff but returns IL_LIB_TIFF_ERROR.<br>It opens fine in Photoshop but it seems floating point isn&#39;t fully supported in libTiff?<br><br>
thanks for any insight,<br><br><br><br>Some info on the file..<br><br>C:\temp\tiff-3.8.2-1-bin\bin&gt;tiffinfo ConvenienceStoreFloor_1a_shape.tif<br>TIFF Directory at offset 0xa (10)<br>&nbsp; Subfile Type: (0 = 0x0)<br>&nbsp; Image Width: 256 Image Length: 256
<br>&nbsp; Resolution: 72, 72<br>&nbsp; Bits/Sample: 32<br>&nbsp; Sample Format: IEEE floating point<br>&nbsp; Compression Scheme: PackBits<br>&nbsp; Photometric Interpretation: RGB color<br>&nbsp; Extra Samples: 1&lt;assoc-alpha&gt;<br>&nbsp; Samples/Pixel: 4
<br>&nbsp; Rows/Strip: 256<br>&nbsp; Planar Configuration: single image plane<br><br><br>SubFileType (1 Long): Zero<br>ImageWidth (1 Long): 256<br>ImageLength (1 Long): 256<br>BitsPerSample (4 Short): 32, 32, 32, 32<br>Compression (1 Short): PackBits (aka Macintosh RLE)
<br>Photometric (1 Short): RGB<br>StripOffsets (1 Long): 252<br>SamplesPerPixel (1 Short): 4<br>RowsPerStrip (1 Long): 256<br>StripByteCounts (1 Long): 700221<br>XResolution (1 Rational): 72<br>YResolution (1 Rational): 72
<br>PlanarConfig (1 Short): Contig<br>ExtraSamples (1 Short): 1<br>SampleFormat (4 Short): 3, 3, 3, 3<br><br><br><br>

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