49 lines
2.2 KiB
TeX
49 lines
2.2 KiB
TeX
%% background.sty 04 Nov 99
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%%-----------------------------------------------------------
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%%
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%%
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%% Take care: because we have to insert a pdf comment starting with
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%% the letter '%' the catcode of '%' will be changed temporarily.
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%% leave, if not creating pdf, but provide the undefined commands
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\ifx\pdfoutput\undefined
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\ifx\pagecolor\undefined
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% a dummy definition
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\newcommand\pagecolor[1]{}%
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\message{Warning, pagecolor definitions ignored for non pdf processing}%
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\fi
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\def\bg@hpagecolorTwo[#1]#2{}%
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\def\bg@vpagecolorTwo[#1]#2{}%
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\def\bg@hpagecolor#1{}%
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\def\bg@vpagecolor#1{}%
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\def\hpagecolor{\@ifnextchar [{\bg@hpagecolorTwo}{\bg@hpagecolor}}%
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\def\vpagecolor{\@ifnextchar [{\bg@vpagecolorTwo}{\bg@vpagecolor}}%
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\expandafter\endinput
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\fi
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{\catcode`\%=11\catcode`\!=14 !make '!' the comment character for now
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\gdef\pagecolor#1{\@ifundefined{\string\color @#1}!
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{\message{pagecolor: color #1 is undefined}}!
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{\pdfliteral{%mbackground \csname\string\color@#1\endcsname}}!
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}!
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\gdef\bg@vpagecolorTwo[#1]#2{\@ifundefined{\string\color @#1}!
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{\message{vpagestripes: color #1 is undefined}}!
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{\@ifundefined{\string\color @#2}!
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{\message{vpagestripes: color #2 is undefined}}!
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{\pdfliteral{%gradbackground vt \csname\string\color@#1\endcsname/\csname\string\color@#2\endcsname}}}!
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}!
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\gdef\bg@hpagecolorTwo[#1]#2{\@ifundefined{\string\color @#1}!
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{\message{pagestripes: color #1 is undefined}}!
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{\@ifundefined{\string\color @#2}!
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{\message{pagestripes: color #2 is undefined}}!
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{\pdfliteral{%gradbackground ht \csname\string\color@#1\endcsname/\csname\string\color@#2\endcsname}}}!
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}!
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\gdef\bg@hpagecolor#1{\@ifundefined{\string\color @#1}!
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{\message{hpagecolor: color #1 is undefined}}!
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{\pdfliteral{%gradbackground ho \csname\string\color@#1\endcsname}}}!
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\gdef\bg@vpagecolor#1{\@ifundefined{\string\color @#1}!
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{\message{vpagecolor: color #1 is undefined}}!
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{\pdfliteral{%gradbackground vo \csname\string\color@#1\endcsname}}}!
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\gdef\hpagecolor{\@ifnextchar [{\bg@hpagecolorTwo}{\bg@hpagecolor}}!
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\gdef\vpagecolor{\@ifnextchar [{\bg@vpagecolorTwo}{\bg@vpagecolor}}!
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}%
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