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authorKarl Berry <karl@freefriends.org>2007-01-10 14:24:11 +0000
committerKarl Berry <karl@freefriends.org>2007-01-10 14:24:11 +0000
commitb9fd29406413c01cc709fb8b05db351a186b59e1 (patch)
treef340b9080eaa3ae132e4f385a9e4599484b4184f /Master/texmf-dist/tex/latex/oberdiek/transparent.sty
parent9b59cc38f7742b307db35f5c1a70c197e998f61a (diff)
oberdiek: pdfcolfoot 1.0, transparent 1.0
git-svn-id: svn://tug.org/texlive/trunk@3290 c570f23f-e606-0410-a88d-b1316a301751
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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 <oberdiek@uni-freiburg.de>
+%%
+%% This work may be distributed and/or modified under the
+%% conditions of the LaTeX Project Public License, either
+%% version 1.3 of this license or (at your option) any later
+%% version. 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'.