Python Twain Module

File Release Notes and Changelog

Release Name: 1.0 beta 2

Notes:
Release 1.0, Beta 2  (May 2002).

o       Left trace statements in the code. These are conditionally
        compiled out using the constant TRACE.

o       Disabled the checks for buffer overruns. These are conditionally
        compiled out using the constant ENABLE_BUFFER_CHECK.

o       Included the code for building a Python 2.1 version in the
        standard source.
 
o       Support Python threading. Where the module is invoked from
        the Python interpreter, the interpreter lock will be released
        during blocking code. This introduces a possible reentrancy
        problem. It is the responsibility of the application programmer
        go guard against this reetrancy.
 
o       Support the conversion of a larger set of windows bitmap
        files to the XBM format.
 
o       Removed a redundant function to process windows messages by
        a per source manager object ( SourceManager_ProcessEventImpl). The
        software can only connect to a single source manager.
 
o       Created a new function called Version(), which will return
        a version string for the module. In this release it returns
        "1.0b2".
 
o       Created destroy() methods on the SourceManager and Source objects.
        This allows the application to force the disconnection, without
        relying on the destructor.
 
o       Fixed an error in the sequence of callbacks to the Python code.
        The callbacks could cause a segment violation, where the object
        performing the callback is destroyed during the callback.
 
o       Where calls to the dll entry point require NULL values, these
        are passed through. In beta 1, the module used a live pointer to
        allocated memory, so that it could check for corruption.
 
o       Fixed the document string on DIBToXBMFile function.
 
o       Changed the simple_wx.py demo, to provide a scrolling window, which
        displays a better bitmap. It no longer shows the scanner user interface.
 
o       Changed the simple_tk.py to be slightly larger, and to request
        a black & white fixed size image. It no longer shows the scanner
        user interface.
 
o       The twexplore is now compiled with -w option (thanks Marcus Gritsch).
        The twexplore has more visible clues about the transfer file. It makes
        sure that the image window is on top.
 
o       The new methods are included in the documentation. Some errors in the
        index page are fixed. Two entries have been made in the faq.                                                               

Changes: