It processes instructions from PostScript and shows the results on the computer screen. As a side note, the Adobe Graphics Model (AGM) used by InDesign® is a RIP as well. A PostScript printer reads and comprehends PostScript programs, and then it yields graphical information that is converted to images. The RIP will take in code and render it into a set of dots on a page. For PostScript, this processor is an RIP or Raster Image Processor it is a combination of hardware and software which is typically inside a printer. Ends hereĪ processor is needed with any programming language to run the code. It is designed to give a very accurate description of what a page looks like. However, PostScript differs from these other languages in that it is only meant to perform one task. It has now been firmly established that PostScript is a program, like Fortran, BASIC, Fortran, and C++. With the Illustrator program, a designer can draw with graphic tools on the computer while the program is working in the background to automatically write a PostScript program. Illustrator was the original “graphical PostScript interface ” it is comparable to Microsoft® Windows 1.0, which placed a graphical user interface on MS/DOS. What programmers would do was peruse the PostScript Language Reference Manual, type the appropriate PostScript “code” into a text file, and then export the file to the printer to be “processed” (this will be explained shortly). When PostScript first came out, it was only possible to create drawings by manually typing in that language. This program will define the dimensions of a page and draw a box on it. You will see a program, coded in the PostScript language. Draw a box, save the file, and then reopen it in a word processing program. Open up Adobe Illustrator® and create a new document. You can actually experiment with this so that you have firsthand experienced. This is a page description language essentially, it is a programming language similar to the languages that software engineers work with to form apps. The first thing we should do is take a look at PostScript. The mystique will disappear, and you will finally understand, after this quasi-technical explanation of both of these types of software. If you have ever wondered why this is the case, it helps to first know exactly what PDF and PostScript are at the most basic of levels. Actually, you have probably heard many people saying that PDF is a potential replacement for Adobe PostScript. WHY DO WE OFFER TWO PRINTING TECHNOLOGIES? HOW DO THEY DIFFER? By David Evansįor individuals who do not know everything about high-end digital imaging, it might be somewhat difficult to discern differences between Portable Document Format (commonly known as PDF) and Adobe® PostScript®.
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