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diff --git a/library/prolog.ps b/library/prolog.ps deleted file mode 100644 index bf87d31..0000000 --- a/library/prolog.ps +++ /dev/null @@ -1,283 +0,0 @@ -%%BeginProlog -50 dict begin - -% This is a standard prolog for Postscript generated by Tk's canvas -% widget. - -% The definitions below just define all of the variables used in -% any of the procedures here. This is needed for obscure reasons -% explained on p. 716 of the Postscript manual (Section H.2.7, -% "Initializing Variables," in the section on Encapsulated Postscript). - -/baseline 0 def -/stipimage 0 def -/height 0 def -/justify 0 def -/lineLength 0 def -/spacing 0 def -/stipple 0 def -/strings 0 def -/xoffset 0 def -/yoffset 0 def -/tmpstip null def - -% Define the array ISOLatin1Encoding (which specifies how characters are -% encoded for ISO-8859-1 fonts), if it isn't already present (Postscript -% level 2 is supposed to define it, but level 1 doesn't). - -systemdict /ISOLatin1Encoding known not { - /ISOLatin1Encoding [ - /space /space /space /space /space /space /space /space - /space /space /space /space /space /space /space /space - /space /space /space /space /space /space /space /space - /space /space /space /space /space /space /space /space - /space /exclam /quotedbl /numbersign /dollar /percent /ampersand - /quoteright - /parenleft /parenright /asterisk /plus /comma /minus /period /slash - /zero /one /two /three /four /five /six /seven - /eight /nine /colon /semicolon /less /equal /greater /question - /at /A /B /C /D /E /F /G - /H /I /J /K /L /M /N /O - /P /Q /R /S /T /U /V /W - /X /Y /Z /bracketleft /backslash /bracketright /asciicircum /underscore - /quoteleft /a /b /c /d /e /f /g - /h /i /j /k /l /m /n /o - /p /q /r /s /t /u /v /w - /x /y /z /braceleft /bar /braceright /asciitilde /space - /space /space /space /space /space /space /space /space - /space /space /space /space /space /space /space /space - /dotlessi /grave /acute /circumflex /tilde /macron /breve /dotaccent - /dieresis /space /ring /cedilla /space /hungarumlaut /ogonek /caron - /space /exclamdown /cent /sterling /currency /yen /brokenbar /section - /dieresis /copyright /ordfeminine /guillemotleft /logicalnot /hyphen - /registered /macron - /degree /plusminus /twosuperior /threesuperior /acute /mu /paragraph - /periodcentered - /cedillar /onesuperior /ordmasculine /guillemotright /onequarter - /onehalf /threequarters /questiondown - /Agrave /Aacute /Acircumflex /Atilde /Adieresis /Aring /AE /Ccedilla - /Egrave /Eacute /Ecircumflex /Edieresis /Igrave /Iacute /Icircumflex - /Idieresis - /Eth /Ntilde /Ograve /Oacute /Ocircumflex /Otilde /Odieresis /multiply - /Oslash /Ugrave /Uacute /Ucircumflex /Udieresis /Yacute /Thorn - /germandbls - /agrave /aacute /acircumflex /atilde /adieresis /aring /ae /ccedilla - /egrave /eacute /ecircumflex /edieresis /igrave /iacute /icircumflex - /idieresis - /eth /ntilde /ograve /oacute /ocircumflex /otilde /odieresis /divide - /oslash /ugrave /uacute /ucircumflex /udieresis /yacute /thorn - /ydieresis - ] def -} if - -% font ISOEncode font -% This procedure changes the encoding of a font from the default -% Postscript encoding to ISOLatin1. It's typically invoked just -% before invoking "setfont". The body of this procedure comes from -% Section 5.6.1 of the Postscript book. - -/ISOEncode { - dup length dict begin - {1 index /FID ne {def} {pop pop} ifelse} forall - /Encoding ISOLatin1Encoding def - currentdict - end - - % I'm not sure why it's necessary to use "definefont" on this new - % font, but it seems to be important; just use the name "Temporary" - % for the font. - - /Temporary exch definefont -} bind def - -% StrokeClip -% -% This procedure converts the current path into a clip area under -% the assumption of stroking. It's a bit tricky because some Postscript -% interpreters get errors during strokepath for dashed lines. If -% this happens then turn off dashes and try again. - -/StrokeClip { - {strokepath} stopped { - (This Postscript printer gets limitcheck overflows when) = - (stippling dashed lines; lines will be printed solid instead.) = - [] 0 setdash strokepath} if - clip -} bind def - -% desiredSize EvenPixels closestSize -% -% The procedure below is used for stippling. Given the optimal size -% of a dot in a stipple pattern in the current user coordinate system, -% compute the closest size that is an exact multiple of the device's -% pixel size. This allows stipple patterns to be displayed without -% aliasing effects. - -/EvenPixels { - % Compute exact number of device pixels per stipple dot. - dup 0 matrix currentmatrix dtransform - dup mul exch dup mul add sqrt - - % Round to an integer, make sure the number is at least 1, and compute - % user coord distance corresponding to this. - dup round dup 1 lt {pop 1} if - exch div mul -} bind def - -% width height string StippleFill -- -% -% Given a path already set up and a clipping region generated from -% it, this procedure will fill the clipping region with a stipple -% pattern. "String" contains a proper image description of the -% stipple pattern and "width" and "height" give its dimensions. Each -% stipple dot is assumed to be about one unit across in the current -% user coordinate system. This procedure trashes the graphics state. - -/StippleFill { - % The following code is needed to work around a NeWSprint bug. - - /tmpstip 1 index def - - % Change the scaling so that one user unit in user coordinates - % corresponds to the size of one stipple dot. - 1 EvenPixels dup scale - - % Compute the bounding box occupied by the path (which is now - % the clipping region), and round the lower coordinates down - % to the nearest starting point for the stipple pattern. Be - % careful about negative numbers, since the rounding works - % differently on them. - - pathbbox - 4 2 roll - 5 index div dup 0 lt {1 sub} if cvi 5 index mul 4 1 roll - 6 index div dup 0 lt {1 sub} if cvi 6 index mul 3 2 roll - - % Stack now: width height string y1 y2 x1 x2 - % Below is a doubly-nested for loop to iterate across this area - % in units of the stipple pattern size, going up columns then - % across rows, blasting out a stipple-pattern-sized rectangle at - % each position - - 6 index exch { - 2 index 5 index 3 index { - % Stack now: width height string y1 y2 x y - - gsave - 1 index exch translate - 5 index 5 index true matrix tmpstip imagemask - grestore - } for - pop - } for - pop pop pop pop pop -} bind def - -% -- AdjustColor -- -% Given a color value already set for output by the caller, adjusts -% that value to a grayscale or mono value if requested by the CL -% variable. - -/AdjustColor { - CL 2 lt { - currentgray - CL 0 eq { - .5 lt {0} {1} ifelse - } if - setgray - } if -} bind def - -% x y strings spacing xoffset yoffset justify stipple DrawText -- -% This procedure does all of the real work of drawing text. The -% color and font must already have been set by the caller, and the -% following arguments must be on the stack: -% -% x, y - Coordinates at which to draw text. -% strings - An array of strings, one for each line of the text item, -% in order from top to bottom. -% spacing - Spacing between lines. -% xoffset - Horizontal offset for text bbox relative to x and y: 0 for -% nw/w/sw anchor, -0.5 for n/center/s, and -1.0 for ne/e/se. -% yoffset - Vertical offset for text bbox relative to x and y: 0 for -% nw/n/ne anchor, +0.5 for w/center/e, and +1.0 for sw/s/se. -% justify - 0 for left justification, 0.5 for center, 1 for right justify. -% stipple - Boolean value indicating whether or not text is to be -% drawn in stippled fashion. If text is stippled, -% procedure StippleText must have been defined to call -% StippleFill in the right way. -% -% Also, when this procedure is invoked, the color and font must already -% have been set for the text. - -/DrawText { - /stipple exch def - /justify exch def - /yoffset exch def - /xoffset exch def - /spacing exch def - /strings exch def - - % First scan through all of the text to find the widest line. - - /lineLength 0 def - strings { - stringwidth pop - dup lineLength gt {/lineLength exch def} {pop} ifelse - newpath - } forall - - % Compute the baseline offset and the actual font height. - - 0 0 moveto (TXygqPZÄ) false charpath - pathbbox dup /baseline exch def - exch pop exch sub /height exch def pop - newpath - - % Translate coordinates first so that the origin is at the upper-left - % corner of the text's bounding box. Remember that x and y for - % positioning are still on the stack. - - translate - lineLength xoffset mul - strings length 1 sub spacing mul height add yoffset mul translate - - % Now use the baseline and justification information to translate so - % that the origin is at the baseline and positioning point for the - % first line of text. - - justify lineLength mul baseline neg translate - - % Iterate over each of the lines to output it. For each line, - % compute its width again so it can be properly justified, then - % display it. - - strings { - dup stringwidth pop - justify neg mul 0 moveto - stipple { - - % The text is stippled, so turn it into a path and print - % by calling StippledText, which in turn calls StippleFill. - % Unfortunately, many Postscript interpreters will get - % overflow errors if we try to do the whole string at - % once, so do it a character at a time. - - gsave - /char (X) def - { - char 0 3 -1 roll put - currentpoint - gsave - char true charpath clip StippleText - grestore - char stringwidth translate - moveto - } forall - grestore - } {show} ifelse - 0 spacing neg translate - } forall -} bind def - -%%EndProlog |