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Subject: tiff stream interface (contrib)
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Date: Thu, 30 Mar 2000 10:48:51 -0800
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From: "Avi Bleiweiss" <avi@shutterfly.com>
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To: <warmerda@home.com>, <mike@onshore.com>
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Here at Shutterfly we have augmented the file based tiff library to support
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C++ streams. The implementation is an adaptor class, which takes any C++
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stream from the user and in return it deposits i/o operation method pointers
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(e.g. read, write, seek and close) into the tiff's library client state.
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The class TiffStream has an overloaded factory method - makeFileStream -
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which takes the C++ stream as an argument, calls TIFFClientOpen and returns
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a tiff handle. The class retains the tiff handle in its local state and
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provides a helper function (getTiffHandle) to query the handle at any time.
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Additional helper method - getStreamSize - provides the stream size to the
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user. The implementation assumes client responsibility to delete the stream
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object. The class calls TIFFClose at destruction time.
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Attached are a definition (tiffstream.h) and an implementation
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(tiffstream.cpp) files of the TiffStream class. No changes are required to
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the tiff core piece and the class sits on top of the library. The code is
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fairly tested at this point and is used internally in Shutterfly imaging
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software. The code is portable across WindowsNT/Linux/Solaris.
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We at Shutterfly believe this software has benefits to the larger community
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of tiff library users and would like to contribute this software to be part
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of the tiff distributed package. Let me know of any issue.
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contrib/stream/README
