Adobe PDF / PostScript Support
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With the DTWAIN / PDF add-on, additional PDF and PostScript file support is provided for DTWAIN_AcquireFile and DTWAIN_AcquireFileEx. When acquiring to PDF files, the application has the option of:
The following support functions are available:
It is advisable to use the functions above to add text to a page, since DTWAIN_AddPDFText only provides a subset of what can be done with the functions above.
It is most appropriate that these functions are called prior to calling DTWAIN_AcquireFile or DTWAIN_AcquireFileEx. You can also call these functions before a page is acquired by trapping the DTWAIN_TN_TRANSFERREADY notification and calling the PDF function(s) in your handler.
For PostScript files, your applications have a choice of PostScript Level 1, 2, or 3 compliant files. The files that are produced are fully DSC (Document Structuring Conventions) compliant, therefore they can be easily manipulated with various third-party PostScript tools.
Special Note: The saving of Adobe PDF and PostScript files requires a writeable and accessible temporary directory. If you are attempting to acquire PDF / PostScript files, and have errors in creating the files, make sure that your temporary directory (usually C:\TEMP, please check your System settings) is writeable and accessible from the computer running the application. You can also set the temp file directory by calling DTWAIN_SetTempFileDirectory before acquiring images.
Also, PDF / PostScript creation requires that your acquired images are 1, 8, 16, or 24 bit images. If they are any other bit-depth, the PDF / PostScript creation will fail, or the PDF/ PostScript file will not be created correctly.
For more information on the PDF and PostScript file formats, and other Adobe information, go to www.adobe.com.
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