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PDF can contain executable PostScript? That was new to me. I know the syntax is still PostScript, but without the programming language. Is there a nice descript
by ygra 5y ago
PDF can contain executable PostScript? That was new to me. I know the syntax is still PostScript, but without the programming language. Is there a nice description somewhere?
- tdeck 5y agoIt seems that my understanding of this was not correct. I should have checked this before posting it, but I have a vivid memory of some PDF that rendered a different maze each time you opened it using PostScript and that override everything else. Most of what I'm reading suggests that the turing-complete aspects were removed in the design of PDF.
- zauguin 5y agoOld versions of PDF allowed to embed arbitrary PostScript for some area of the page, but this was always specified not to have any effect except if the PDF gets converted to PostScript. Especially it was specified to be ignored by PDF viewers and non PostScript printers, making it rather useless. In current PDF versions, this is no longer allowed.