Desktop - PDF Tools AG

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3-Heights PDF Desktop Producer, Version 4.2 Page 44 of 50 July 26, 2013 Print Quality Rasterize Page JPEG Quality This setting defines the resolution of the target page. Although PDF is a resolution independent format, the print quality influences how coordinates are rounded to integers. This has an impact on the positioning of bitmaps, graphics and text. Furthermore, if downsampling is enabled then the print quality defines the resulting resolution of the image. Finally, the print quality defines the resolution of the back buffer if it is enabled. Increasing the print quality makes This setting converts the page description in a single raster image which constitutes the page of the resulting PDF file. This setting has a similar effect as using the back buffer but rasterizes all content independent whether the back buffer is required or not. This setting is mainly used to protect the page content from being extracted - the document cannot be searched anymore. Rasterizing the page significantly increases the file size in general. The JPEG compression reduces the size of raster images at the price of inaccurate visual details which are usually not observed in photographic images. This setting defines a trade-off between the loss of visual accuracy and compression ratio. 7.3 GDI Specification Coverage The creation of PDF files with the 3-Heigths PDF Producer is accomplished by printing a document to a special printer driver that produces a PDF data stream instead of a printer hardware specific PostScript or HPPCL data stream. In order to do so, applications must use the Windows GDI (graphics device interface) and the printer spooler functions. The GDI specification has been extended with each new version of the Microsoft Windows operating system. The 3-Heights PDF Producer printer driver is based on the GDI specification for Windows 2000 and newer systems (XP, Windows 2003 Server, VISTA). All required printer driver functions including alpha blended, parallelogram shaped, color keyed and masked bitmaps as well as gradient fills have been implemented and will produce high quality PDF renderings. The printer driver capabilities are: 24-Bit device surface Constant alpha, per pixel alpha (transparency is replaced with white if compliance is PDF/A-1b) Gradient rectangles, Gradient triangles Alternate and winding fills of shapes Arbitrary opaque brushes for text background rectangles Bézier curves Vector fonts: TrueType, OpenType and Type1 Geometric wide strokes Fonts that have an inherent vertical writing direction PDF Tools AG – Premium PDF Technology
3-Heights PDF Desktop Producer, Version 4.2 Page 45 of 50 July 26, 2013 JPEG compressed bitmaps The following capabilities are not yet implemented but planned in future releases: CMYK color space ICM color management 7.4 Conversion Accuracy Testing Tool PDF Tools AG provides tool to test the conversion accuracy of the PDF and TIFF producer. It can freely be downloaded at www.pdf-tools.com/public/downloads/resources/testafw.zip It can used to experiment with various settings and compare the PDF and TIFF producer with products from other vendors (e.g. the PostScript driver). PDF Tools AG – Premium PDF Technology
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Desktop - PDF Tools AG

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