Ludolf that is *INCORRECT*. PDF and Postscript only share a very common heritage and some similar core data structures (such as dictionaries and arrays) – but beyond that, they are VERY VERY DIFFERENT including the fact that PDF is *NOT* a programming language. It is unfortunate, that even after 30 years(!), this misconception remains out there. It is why it is one of the first slides in my “Everything you wanted to know about PDF” presentation.
Leonard Rosenthol Senior Principal Architect for PDF, Adobe From: Tiff <[email protected]> on behalf of Ludolf Holzheid via Tiff <[email protected]> Date: Saturday, July 13, 2024 at 8:16 AM To: [email protected] <[email protected]> Subject: Re: [Tiff] DATALOSS - tiff2pdf option -n does not, what I expect ... EXTERNAL: Use caution when clicking on links or opening attachments. On 2024-07-13 11:56 +0200, Ulf Zibis via Tiff wrote: > [..] > > Btw: I do not see that PDF is a vector image in general. In my understanding > PDF is a container format, holding any kind of formats and encodings. > Hi Ulf, PDF is no container format, but a binary representation of (a subset of) PostScript. PostScript is a page description language, primarily handling vector graphics at different levels of abstraction. As a (Turing complete) programming language, it is also capable of handling binary data such as raster images. In fact, raster graphics in PostScript and PDF are ‘printed’ by plotting a vector graphic rectangle for each pixel. PDF/PostScript interpreters such as GhostScript are sometimes referred to as ‘raster image processor’ as they plot vector graphic elements as described in the PDF or PostScript file to the ‘canvas’ of a raster image. Ludolf -- Ludolf Holzheid [ˈluː.dɔlf ˈhɔlt͡s.haɪ̯d] Heinrichstraße 6 [ˈhaɪ̯n.ʁɪçˌʃtʁaː.sə 6] 68642 Bürstadt [68642 ˈbyːɐ̯.ʃtat] _______________________________________________ Tiff mailing list [email protected] https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.osgeo.org%2Fmailman%2Flistinfo%2Ftiff&data=05%7C02%7Clrosenth%40adobe.com%7C5753eed54bdf4029e41d08dca335955f%7Cfa7b1b5a7b34438794aed2c178decee1%7C0%7C0%7C638564697737890828%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=El3fm2gG6VnBHf9IuSN6onhcjSfYKkEWdkqS%2B5wdcN8%3D&reserved=0<https://lists.osgeo.org/mailman/listinfo/tiff>
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