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PDF & PS (Postscript) & EPS Tools |
What is PostScript?
PostScript is a computer language designed explicitly for page
description -- for printing graphics and text. It was introduced in
1985 by Adobe and is a great way to describe images in perfect
precision and in a device-independent manner.
The language itself is in ASCII text and can be viewed (though
perhaps not comprehended!!) in your text editor. Normally you are
not intended to edit PostScript manually, but it is certainly
possible, if you know the language. PostScript code, which is
typically interpreted, is stack-based in the same manner as an RPN
calculator. A program pushes arguments to an operator onto a stack
and then invokes the operator. Typically, the operator will have
some result which is left at the top of the stack. As an example,
let us say we want to multiply 12 and 134. We would use the
following PostScript code:
12 134 mul
The first two words '12' and '134' push the numbers 12 and 134 onto
the stack. 'mul' invokes the multiply operator which pops two values
off the stack, multiplies them, and then pushes the result back onto
the stack. The resulting value can be left there to be used by
another operator later in the program.
Another example is drawing purple line segments, with a line
thickness of 10 points (approx 10/72 inches):
10 setlinethickness % self-explanatory
0.62 0.13 0.93 setrgbcolor % purple!
50 50 moveto 300 500 lineto 50 500 lineto stroke
The default coordinate system for an 8.5"×11" page ("letter size")
is 0 0 in the lower left corner to 612 792
in the upper right. Among the top few lines of a well-constructed
PostScript file is bounding box information.
Fonts can be defined in a PostScript file, though it isn't necessary
for basic fonts like Times, Helvetica and Courier. Figures and fonts
can then be placed on a page using PostScript commands which give
concise results with arbitrary resolution. It is also possible to
describe bitmap images in PostScript, which results in huge file
size and limited resolution.
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| Postscript Conversion
Tools from VeryDOC |
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Postscript to Image Converter |
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Convert postscript and EPS files to TIFF, JPEG,
BMP, GIF, PCX, PNG, EPSI, EPSF, etc. formats. |
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PDF to Vector Converter |
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Convert Acrobat PDF files to WMF, EMF, SVG,
HPGL, XPS, PCL, SWF, PS, EPS etc. formats. |
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Postscript to Text Converter |
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Convert postscript and EPS files to plain text
documents. |
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Postscript to PDF Converter |
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Convert postscript and EPS files to Adobe Acrobat
PDF documents. |
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