PostScript(R) Language Program Design by Inc. Adobe Systems

By Inc. Adobe Systems

Introduces the Postscript programming language, describes the imaging version, and discusses emulators, web page layout, software constitution, scanned photos, dossier merging, and mistake dealing with.

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If there is not enough room, the least recently used characters are removed. Entries are made into the font cache for a single character, and are not pre-cached for an entire font. The entry is made based on the current font, the size and orientation of the character (based on the current transformation matrix), the character name, and its width.

Thus the distinction between /findfont and findfont is made by the scanner, which sets the literal or executable flag on the resulting name object. The scanner recognizes strings (with either the (string) or notation) and converts them into string objects. The scanner also recognizes the backslash notation in string objects (including \\, \(, \), and \octal notation). For example, if it encounters a sequence like the following: (\101B\103D \\\(ABCD\) (balanced)) chapter 2 THE EXECUTION MODEL 23 the scanner will recognize and replace the backslash notation with the appropriate characters and it will produce a string object as follows.

Avoid unnecessary path operations or safeguards that may seem at first like good, defensive programming. The language is designed to work the way you probably need it to work, and it is best to use it that way. The fill, eofill, and stroke operators effectively “use up” the current path, destroying it when they are through (by executing the equivalent of newpath). The image and imagemask operators do not disturb the current path in any way. The show operator and its siblings make changes only to the current point (corresponding to the width of the string being shown), and otherwise do not disturb the current path.

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