Postscript
==========

Postscript is a page description and programming language.

`gv` can view postscript files, and also provides useful ps tools.


## Hello, world ##

hello.ps:

    %!PS-Adobe-3.0

    %%Pages: 2
    %%DocumentData: Clean7Bit
    %%LanguageLevel: 3
    %%DocumentMedia: Letter 612 792 0 () ()
    %%Page: 1 1
    %%BeginPageSetup
    %%PageOrientation: Portrait
    %%EndPageSetup
    /Times-Bold findfont
    30 scalefont
    setfont
    100 300 moveto
    (Hello, world! Page 1) show
    showpage
    %%Page: 2 2
    %%BeginPageSetup
    %%PageOrientation: Portrait
    %%EndPageSetup
    /Times-Bold findfont
    30 scalefont
    setfont
    100 300 moveto
    (Hello, world! Page 2) show
    showpage
    %%EOF

Coordinates are measured in points, and originate from the bottom left of the page.

Note that the blank line after the header is required.


## Including An Image ##

(I ripped the image data out of a ps I saved out of Gimp.)

hello-img.ps:

    %!PS-Adobe-3.0

    %%Pages: 1
    %%DocumentData: Clean7Bit
    %%LanguageLevel: 3
    %%DocumentMedia: Letter 612 792 0 () ()
    %%Page: 1 1
    %%BeginPageSetup
    %%PageOrientation: Portrait
    %%EndPageSetup
    /Times-Bold findfont
    30 scalefont
    setfont
    200 300 moveto
    (Hello, world!) show
    % Translate for offset
    100 100 translate
    % Translate to begin of first scanline
    0 67.679999999999993 translate
    46.799999999999997 -67.679999999999993 scale
    % Image geometry
    65 94 8
    % Transformation matrix
    [ 65 0 0 94 0 0 ]
    currentfile /ASCII85Decode filter /RunLengthDecode filter
    %%BeginData:         1551 ASCII Bytes
    image
    hZ*?Nm/Q_XquH6dp]0jaquHWpq>^<lnc/@anc/LequHQmqZ-0dp]0jaquHWpq>^<lnc/@anc/Le
    quHQmq>g*dq#KpaquHToqZ$BlgAh$MqZ-HlqZ,@MqZ-Knq>^<lgAh$MqZ-EkquGINqZ$WrquHNl
    quH6dquH6dqZ$WrquHNlquH6dquH9eqZ$Wr!<;rsq#C6lnGiCdnc/Id!<3'!mJubVquH9eqZ$Wr
    !<;Ednc/Lenc/Id!<3'!m/Z\VquH9eqZ$Wr!<;Ednc/Lenc/Id!<3'!m/Z\VquH9eqZ$Wr!<;rs
    q#C0joDe[fnc/Id!<3'!quHKkqZ-6fqZ-0dqZ$Wr!<;rsp](*joDe[fnGiCd!<3'!quHKkqZ-6f
    qZ--cqu?`s!<;orq#C0jo`+dglMgkaqZ-BjqZ-9gquH!]!<;orp](*jo`+ghl2Lb`qZ-BjqZ-9g
    quH!]!<;orp](*jo`+ghnc/Ids8VTgqZ-9gquH<fq>gQqn,N:co`+gho)JOds8UpTquH<fq>gQq
    aoD2;s8U4@q>gQqaoD2;s8U4@q>gQq_#NTtq#KFSkl:>VjT"`LqZ$WroDn"Qo)J"Ujo=rPklBlG
    o`*kMmJlhYn,WLgoDn:Yp&FL]rr;Qimf3"\n,WCdo)S7Zr;Z?gs8Voqr;Z?gn,N=coDnjiquHWo
    o)S7ZrVuHhqu?WqqZ$Em!<;lqnGiLfo)SXerW)fpquH`rqZ--crr;Tjq>^EoqZ$Npr;ZWonGiOg
    o)SUdr;c`prW)lrqZ--c!<;Tiq>^Bnqu?Wqr;ZWonG`Lgnc8Lcr;c`prW)lrqZ--c!<;lqrVufr
    q#C<nqu?Wqr;ZWonG`LgqZ-Qor;cWmrW)iqrW)lrquH3cq>gHnr;cWmrW)iqrW)lrquH3cqZ-Nn
    rW)]mrW)lrr;cfrqZ-*bqZ-NnrW)`nr;ccqr;cfrqZ-*bqZ-NnrW)`nr;ccqr;cfrqZ-*bqZ-Nn
    rW)`nrW)iqrW)lrqZ-*bqZ-Nnr;c]or;c`prW)lrqZ-Zrnc/[iqZ-Nnr;c]or;c`prW)lrkl:_`
    qZ-Qor;c]or;c`prW)lrkl:_`qZ-NnrW)fprW)fprW)lrkl:_`q>gHnrW)fprW)fprW)iql2Uha
    q>gHnrW)-]o`4piqZ-ZrqZ-QorW)*\p]10jqZ-Zrq>gKorW)'[q>gBlq>gQqq>gKorW(RMq>gNp
    qZ,(Ep]1<nqZ,+Fp](<orr;iqec5=C!<<#tqZ,:Ko`5$lrVu`pg]-jFrr;rsqZ,IPnc8XgrVu`p
    huE6Iqu?WpqZ,RSo)SUdr;ZZpiW&NMp](0kquGaVo`4[br;ZZpj8\fQoDeagquGgXpAja`r;ZZp
    jo>&TnGiFdqZ,gZpAj[^r;ZWokPt;Wmf34bqZ,j[p]0^]r;ZTnlMpVZm/R"`q>fg\q#Ka\qu?Km
    m/Qk]lMpb]q#Kg^q#K^[qZ$BlmJm"_l2UV[q>fp_qZ,j[qZ$BlmJm%`kl:JYqZ-$`quGp[q#C6l
    mJm(akPt>WquH-aquGp[J,~>
    %%EndData
    showpage
    %%EOF

## Links ##

http://www-cdf.fnal.gov/offline/PostScript/BLUEBOOK.PDF
http://paulbourke.net/dataformats/postscript/
http://www.physics.emory.edu/faculty/weeks//graphics/howtops1.html
http://www.tailrecursive.org/postscript/postscript.html