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%%
%% This is file `transparent.sty',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% transparent.dtx (with options: `package')
%%
%% This is a generated file.
%%
%% Copyright (C) 2007 by
%% Heiko Oberdiek <heiko.oberdiek at googlemail.com>
%%
%% This work may be distributed and/or modified under the
%% conditions of the LaTeX Project Public License, either
%% version 1.3c of this license or (at your option) any later
%% version. This version of this license is in
%% http://www.latex-project.org/lppl/lppl-1-3c.txt
%% and the latest version of this license is in
%% http://www.latex-project.org/lppl.txt
%% and version 1.3 or later is part of all distributions of
%% LaTeX version 2005/12/01 or later.
%%
%% This work has the LPPL maintenance status "maintained".
%%
%% This Current Maintainer of this work is Heiko Oberdiek.
%%
%% This work consists of the main source file transparent.dtx
%% and the derived files
%% transparent.sty, transparent.pdf, transparent.ins, transparent.drv,
%% transparent-example.tex.
%%
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{transparent}%
[2007/01/08 v1.0 Using a pdfTeX's color stack for transparency (HO)]%
\RequirePackage{ifpdf}
\ifpdf
\else
\PackageWarningNoLine{transparent}{%
Loading aborted, because pdfTeX is not running in PDF mode%
}%
\expandafter\endinput
\fi
\begingroup\expandafter\expandafter\expandafter\endgroup
\expandafter\ifx\csname pdfcolorstackinit\endcsname\relax
\PackageWarningNoLine{transparent}{%
Your pdfTeX version does not support color stacks%
}%
\expandafter\endinput
\fi
\RequirePackage{auxhook}
\AddLineBeginAux{%
\string\providecommand{\string\transparent@use}[1]{}%
}
\gdef\TRP@list{/TRP1<</ca 1/CA 1>>}
\def\transparent@use#1{%
\@ifundefined{TRP#1}{%
\g@addto@macro\TRP@list{%
/TRP#1<</ca #1/CA #1>>%
}%
\expandafter\gdef\csname TRP#1\endcsname{/TRP#1 gs}%
}{%
% #1 is already known, nothing to do
}%
}
\AtBeginDocument{%
\TRP@addresource
\let\transparent@use\@gobble
}
\def\TRP@addresource{%
\begingroup
\edef\x{\endgroup
\pdfpageresources{%
\the\pdfpageresources
/ExtGState<<\TRP@list>>%
}%
}%
\x
}
\newif\ifTRP@rerun
\xdef\TRP@colorstack{%
\pdfcolorstackinit page direct{/TRP1 gs}%
}
\newcommand*{\transparent}[1]{%
\begingroup
\dimen@=#1\p@\relax
\ifdim\dimen@>\p@
\dimen@=\p@
\fi
\ifdim\dimen@<\z@
\dimen@=\z@
\fi
\ifdim\dimen@=\p@
\def\x{1}%
\else
\ifdim\dimen@=\z@
\def\x{0}%
\else
\edef\x{\strip@pt\dimen@}%
\edef\x{\expandafter\@gobble\x}%
\fi
\fi
\if@filesw
\immediate\write\@auxout{%
\string\transparent@use{\x}%
}%
\fi
\edef\x{\endgroup
\def\noexpand\transparent@current{\x}%
}%
\x
\transparent@set
}
\AtEndDocument{%
\ifTRP@rerun
\PackageWarningNoLine{transparent}{%
Rerun to get transparencies right%
}%
\fi
}
\def\transparent@current{/TRP1 gs}
\def\transparent@set{%
\@ifundefined{TRP\transparent@current}{%
\global\TRP@reruntrue
}{%
\pdfcolorstack\TRP@colorstack push{%
\csname TRP\transparent@current\endcsname
}%
\aftergroup\transparent@reset
}%
}
\def\transparent@reset{%
\pdfcolorstack\TRP@colorstack pop\relax
}
\newcommand*{\texttransparent}[2]{%
\protect\leavevmode
\begingroup
\transparent{#1}%
#2%
\endgroup
}
\endinput
%%
%% End of file `transparent.sty'.
|
