DLI Implementation and Reference Guide - Datalogics

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1.12 DLI Implementation and Reference Guide PDF Image Import Improvements PDF image import has been enhanced as of DLI v3.0.13. The value of the imported PDF file's Rotate key, if present, is now honored. Images are imported by DLI and placed in the rotated orientation displayed by Adobe Reader and Acrobat. For the dlpdfimagecreatefrompdf call, a value of 0 is now accepted for the Width and Depth parameters. If either are 0, then the PDF page's crop box is used to form the DLPDFIMAGE's visible region. This will be shifted using the XDisp and YDisp values to generate the imported image. New Functions dlpdfmemfiledeleteonclose This method marks a Files In Memory (FIM) file to be removed from the filesystem once the last open filehandle for the file has been closed. NOTE: No file is automatically removed from memory, unless dlpdfmemfiledeleteonclose has been called for a specific MDFile. dlpdfmemfilesetbuffer This method configures Files In Memory to directly use the buffer passed in as the file contents. dlpdfmemfilesyssetmemlimit This method establishes an upper bound, in bytes, of the memory usage allowed for file contents by DLI. dlpdfmemfilesysgetmemusage This returns an ASSize_t with the current usage, in bytes, of memory for file contents.
Getting Started 1.13 dlpdfdoccreatesignature dlpdfdocsetsignatureappearance dlpdfpageplacesignature dlpdfsignaturesetdatacallback dlpdfsignaturesetpkcs7cert dlpdfsignaturesetx509cert These new methods support Digital Signatures in documents. See the chapter on “Digital Signatures” on page 15.1 for more details. dlpdfdocasciips This method was added to support creation of PostScript output suitable for transmission through channels and to devices which do not accept binary data. Most PostScript printers cannot properly process binary PostScript input; Distiller and most print spoolers will accept binary PostScript data. dlpdfinstancesetgrcachelimits This method was added to support customers who would like to limit the amount of filesystem storage used for the DLI graphics cache. This accepts a low-water and a high-water mark, in bytes. If the graphics cache reaches the high-water mark, graphics will be removed from the cache in least recently used (LRU) order. Graphics will be removed until the cache falls to or below the low-water mark. dlpdftext This creates a DLPDFTEXT area from a string of a given length (in bytes) and an encoding. dlpdftextshowencodingnames This method can be used to obtain a list of valid Encoding names provided via the International Components for Unicode (ICU) module, for use when calling dlpdftext. dlpdftextfromutf8 dlpdftextfromutf16le dlpdftextfromutf16be dlpdftextfromutf16he dlpdftextfromutf32le dlpdftextfromutf32be dlpdftextfromutf32he These are convenience functions for common Unicode encodings.
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