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authorKarl Berry <karl@freefriends.org>2008-04-16 00:49:36 +0000
committerKarl Berry <karl@freefriends.org>2008-04-16 00:49:36 +0000
commit74b09c529472ec24454c2bfb95d41795233e7d9a (patch)
tree0ac085455e6e589f61024808c05988073278b79e /Master/texmf-dist/metapost/epsincl
parenta35845a36ac2ee5a72f83f3820bf60c59285f07c (diff)
metapost package epsincl
git-svn-id: svn://tug.org/texlive/trunk@7437 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Master/texmf-dist/metapost/epsincl')
-rw-r--r--Master/texmf-dist/metapost/epsincl/epsincl.mp116
1 files changed, 116 insertions, 0 deletions
diff --git a/Master/texmf-dist/metapost/epsincl/epsincl.mp b/Master/texmf-dist/metapost/epsincl/epsincl.mp
new file mode 100644
index 00000000000..27b1f6bc009
--- /dev/null
+++ b/Master/texmf-dist/metapost/epsincl/epsincl.mp
@@ -0,0 +1,116 @@
+%%% addto closefrom readfrom
+% made in BOP s.c., bop@bop.com.pl; public domain software
+% history: 20.08.1999: ver. 0.1, pre-release
+% 05.01.2000: ver. 0.2, first release
+
+def verify_operator primary x = x if not x: expandafter gobble fi enddef;
+
+if not verify_operator known closefrom "????????": % tricky, isn't it
+% |closefrom| primitive is available in MP since ver. 0.64
+ def closefrom expr eps_name =
+ forever: exitif (readfrom eps_name)=EOF; endfor
+ enddef;
+fi
+
+% The structure |eps_data| is presumed to be local for a given figure.
+% If the same outer picture is to be included in several figures, its
+% header must be examined each time anew. This is necassary if we want
+% to include EPS files generated by METAPOST; otherwise we would have
+% to store the information about the fonts used in EPS files being
+% included. Note that the possibility of multiple reading necessitates
+% using the |closefrom| operator.
+
+def ini_eps =
+% The common construction |save eps_data| must not be used,
+% because of implicit reference to |ini_eps| in |use_eps|.
+ numeric eps_data.used[\\];
+ string eps_data.name[\\];
+ pair eps_data.ll[\\], eps_data.ur[\\];
+ color eps_data.col[\\];
+ eps_data.num:=0; eps_data.col[eps_data.num]=(0, 1, .5);
+enddef;
+
+vardef fix_eps(expr eps_name) =
+ save i_, j_, k_, l_, n_;
+ i_:=0;
+ forever:
+ i_:=i_+1; exitif i_>eps_data.num; exitif eps_data.name[i_]=eps_name;
+ endfor
+ if i_<=eps_data.num: errmessage "EPS " & eps_name & " already fixed";
+ else:
+ forever:
+ string l_; % this improves string memory handling (why?)
+ l_:=readfrom eps_name; exitif l_=EOF;
+ if substring (0,14) of l_="%%BoundingBox:":
+ j_:=14;
+ for k_=1,2,3,4:
+ i_:=j_;
+ forever: % scan spaces
+ exitif (substring (i_,i_+1) of l_) <> " "; i_:=i_+1;
+ endfor
+ j_:=i_;
+ forever: % scan digits
+ exitif ((substring (j_,j_+1) of l_) = " ")
+ or ((substring (j_,j_+1) of l_) = "");
+ j_:=j_+1;
+ endfor
+ n_[k_]:=scantokens substring (i_,j_) of l_;
+ endfor;
+ elseif substring (0,7) of l_="%*Font:": special l_;
+ elseif substring (0,1) of l_<>"%":
+ expandafter exitif expandafter true expandafter; % avoid ``dangling'' fi
+ fi
+ endfor
+ eps_data.num:=eps_data.num+1;
+ eps_data.name[eps_data.num]:=eps_name;
+ if l_=EOF:
+ eps_data.used[eps_data.num]:=-1;
+ message "EPS file " & eps_name & " malformed or not found.";
+ else:
+ eps_data.used[eps_data.num]:=0;
+ eps_data.ll[eps_data.num]:=(n_1, n_2);
+ eps_data.ur[eps_data.num]:=(n_3, n_4);
+ eps_data.col[eps_data.num]:=eps_data.col0+1/1000eps_data.num*(1, -1,0);
+ fi
+ closefrom eps_name;
+ fi
+enddef;
+
+vardef use_eps(expr eps_name) =
+ if unknown eps_data.num: ini_eps; fi
+ save currentpicture; picture currentpicture; currentpicture:=nullpicture;
+ save i_; i_:=0;
+ forever:
+ i_:=i_+1;
+ exitif i_>eps_data.num;
+ exitif eps_data.name[i_]=eps_name;
+ endfor
+ if i_>eps_data.num: fix_eps(eps_name); fi
+ % invariant: |(eps_data.name[i_]=eps_name) && known eps_data.used[i_]|
+ if eps_data.used[i_]>=0: % fixing was successful
+ fill unitsquare
+ xscaled xpart(eps_data.ur[i_]-eps_data.ll[i_])
+ yscaled ypart(eps_data.ur[i_]-eps_data.ll[i_])
+ withcolor eps_data.col[i_];
+ if eps_data.used[i_]=0:
+ special "%EPS "
+ & decimal(redpart(eps_data.col[i_])) & " "
+ & decimal(greenpart(eps_data.col[i_])) & " "
+ & decimal(bluepart(eps_data.col[i_])) & " "
+ & eps_name & " "
+ & decimal(xpart(eps_data.ll[i_])) & " "
+ & decimal(ypart(eps_data.ll[i_])) & " "
+ & decimal(xpart(eps_data.ur[i_])) & " "
+ & decimal(ypart(eps_data.ur[i_]));
+ eps_data.used[i_]:=1;
+ fi
+ currentpicture
+ else: % fixing failed (either missing file or bounding box not found)
+ nullpicture
+ fi
+enddef;
+
+extra_beginfig:=extra_beginfig & ";ini_eps;";
+
+endinput;
+%%\end