File Format PDF

The Portable Document Format (PDF) was developed by the Adobe Corporation to allow the exchange and viewing of electronic documents easily and reliably, independent of the environment in which they were created. This format lets you compress large documents to a size small enough to download very quickly. It is also becoming a powerful format for reproducing documents over the web.

PDF support is included with the LEADTOOLS PDF Pro, Pro Suite, and the Document and Medical toolkits.

The PDF Filter can:

Save to the PDF v1.2, v1.4, v1.5, v1.6, and v1.7 file formats
Save to the PDF/A format
Load and save PDF annotations
Load AI (Adobe Illustrator) files from version 7 to version 10, which only have PDF data
Load encrypted Pdf files with 40bit RC4, 128bit RC4, 128bit AES and 256AES v3.0 encryption
Save large images by setting the LowMemoryUsage property
Load files that are stored in memory (memory files).
Enhance PDF page extraction (avoids producing broken files when PDF files has internal links)
Load the PDF format either as a raster image or as an SVG (Scalable Vector Graphics) document. See Working With SVG for more details.

The following table summarizes the filter's capabilities:

PDF Version	Read	Write Flags
PDF v1.2	Supported	V12
PDF v1.3	Supported	V13
PDF v1.4	Supported	V14
PDF v1.5	Supported	V15
PDF v1.6	Supported	V16
PDF v1.7	Supported	V17
PdfA	Supported	PdfA

By default, the filter saves to PDF v1.2. To save the PDF file as a specific PDF version, set the value of the Version property to:

CodecsRasterPdfVersion.PdfA to save as PDF/A.
CodecsRasterPdfVersion.V17 to save as PDF v1.7.
CodecsRasterPdfVersion.V16 to save as PDF v1.6.
CodecsRasterPdfVersion.V15 to save as PDF v1.5.
CodecsRasterPdfVersion.V14 to save as PDF v1.4.
CodecsRasterPdfVersion.V13 to save as PDF v1.3.
CodecsRasterPdfVersion.V12 to save as PDF v1.2.

In LEADTOOLS version 16 and later, the PDF Filter supports saving PDF/A format. PDF/A does not support all compression formats (see http://www.pdfa.org/doku.php?id=artikel:en:pdfa_a_look_at_the_technical-side for more details). Therefore you cannot use this flag in conjunction with RasterImageFormat.RasPdfLzw.

This filter can load JBIG2 compressed PDF files. It can both load and save PDF files that are JPEG CCITT, CCITT G3 2D, or CCITT G4 compressed, or are uncompressed. In addition, this filter supports saving JBIG2 and JPEG2000 compressed data. (Note that JBIG2 is only available for PDF 1. 4 or later and JPEG2000 is only available for PDF 1.5 or later.)

IThis filter supports an option that disables the cropping of files, by setting the DisableCropping property, and an option that disables the use of CIE colors, by setting the DisableCieColors property. Disabling the use of CIE colors will result in faster loading of PS files.

The file constants associated with this file format are:

Constant	Read Support	Write Support	Description
RasPdf	Yes*	1, 2, 4, 8, 24 BPP	Raster PDF uncompressed.
RasPdfCmyk	N/A*	24 BPP	Raster PDF with CMYK support.
RasPdfG31Dim	N/A*	1 BPP	Raster PDF with G3 1D Compression.
RasPdfG32Dim	N/A*	1 BPP	Raster PDF with G3 2D Compression.
RasPdfG4	N/A*	1 BPP	Raster PDF with G4 Compression.
RasPdfLzw	N/A*	1, 2, 4, 8, 24 BPP	Raster PDF with LZW Compression.
RasPdfLzwCmyk	N/A*	24 BPP	Raster PDF with CMYK support and LZW Compression.
RasPdfJpeg	N/A*	8 BPP (Grayscale) 24 BPP	Raster PDF with JPEG 4:4:4 Compression.
RasPdfJpeg422	N/A*	24 BPP	Raster PDF with JPEG 4:2:2 Compression.
RasPdfJpeg411	N/A*	24 BPP	Raster PDF with JPEG 4:1:1 Compression.
RasPdfJbig2	N/A*	1 BPP	Raster PDF with JBIG2 Compression.
RasPdfJpx	N/A*	24 BPP	Raster PDF with Jpx Compression.

*NOTE: When you request file information on a PDF file, RasPdf will always be returned for the file format, regardless of the composition of the PDF file. LEADTOOLS can read PDF documents that are made up of both text and images. The text and images are rasterized into one raster image for each page of the document. LEADTOOLS can write PDF documents that are made up of raster images only.

NOTE: LEADTOOLS supports writing the PDF file format using the LEADTOOLS Document Writers. For more information, refer to Programming with the LEADTOOLS Document Writers.

Required DLL: Leadtools.Pdf.dll, Leadtools.ColorConversion.dll and Leadtools.Codecs.Fax.dll. The files required for reading PDF and writing PDF are different. For a listing of the exact DLLs needed, based on the toolkit version, refer to Files To Be Included With Your Application .

Platforms: .NET 2/3, .NET 4, Silverlight, Android and WinRT (NOTES: For Silverlight, only raster write is supported. For WinRT, the data must not be compressed and only certain bits/pixel are acceptable).