Using Imported Graphics in LaTeX and pdfLaTeX - Mirror
Using Imported Graphics in LaTeX and pdfLaTeX - Mirror
Using Imported Graphics in LaTeX and pdfLaTeX - Mirror
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Then use the comm<strong>and</strong> \usebox{\mygraphic} wherever you want the graphic.<br />
(The graphics can be scaled by plac<strong>in</strong>g the \usebox comm<strong>and</strong> <strong>in</strong>side a \scalebox<br />
or \resizebox comm<strong>and</strong>.)<br />
3. When the eps file conta<strong>in</strong>s vector graphics (as opposed to bitmapped graphics),<br />
it is possible to write a PostScript comm<strong>and</strong> which draws the graphics 23 . The<br />
graphic can then be <strong>in</strong>cluded by issu<strong>in</strong>g the PostScript comm<strong>and</strong> wherever the<br />
graphic is needed. Section 16.1 on Page 50 describes this procedure.<br />
S<strong>in</strong>ce the f<strong>in</strong>al PostScript file <strong>in</strong>cludes the graphics comm<strong>and</strong>s only once, the<br />
f<strong>in</strong>al PostScript file is much smaller. Note that s<strong>in</strong>ce the graphics comm<strong>and</strong>s<br />
are stored <strong>in</strong> pr<strong>in</strong>ter memory while the f<strong>in</strong>al PostScript file is be<strong>in</strong>g pr<strong>in</strong>ted,<br />
this method may cause the pr<strong>in</strong>ter to run out of memory <strong>and</strong> not pr<strong>in</strong>t the<br />
document.<br />
Although this method results <strong>in</strong> a small f<strong>in</strong>al PostScript file, it still requires<br />
L A TEX to f<strong>in</strong>d <strong>and</strong> read the file conta<strong>in</strong><strong>in</strong>g the PostScript comm<strong>and</strong>s.<br />
4. Like the previous method, def<strong>in</strong>e a PostScript comm<strong>and</strong> which draws the graphics,<br />
but <strong>in</strong>clude this comm<strong>and</strong> <strong>in</strong> a L A TEX box. This results <strong>in</strong> a small f<strong>in</strong>al<br />
PostScript file <strong>and</strong> only requires L A TEX to f<strong>in</strong>d <strong>and</strong> read the file once.<br />
16.1 Def<strong>in</strong><strong>in</strong>g a PostScript Comm<strong>and</strong><br />
This section describes how to created a PostScript comm<strong>and</strong> which draws the graphics<br />
from an eps file conta<strong>in</strong><strong>in</strong>g vector graphics. This procedure does not work if the<br />
eps file conta<strong>in</strong>s bitmapped graphics.<br />
To convert the eps graphics <strong>in</strong>to a PostScript comm<strong>and</strong>, the eps file must be<br />
broken <strong>in</strong>to two files, one which def<strong>in</strong>es the PostScript dictionary <strong>and</strong> the graphics<br />
comm<strong>and</strong>s, <strong>and</strong> another which <strong>in</strong>cludes the header <strong>in</strong>formation <strong>and</strong> the uses the<br />
previously-def<strong>in</strong>ed PostScript comm<strong>and</strong>. For example, an eps file created by Xfig<br />
has the form<br />
%!PS-Adobe-2.0 EPSF-2.0<br />
%%Title: /tmp/xfig-fig017255<br />
%%Creator: fig2dev Version 2.1.8 Patchlevel 0<br />
%%CreationDate: Sun Sep 3 15:36:01 1995<br />
%%Orientation: Portrait<br />
%%Bound<strong>in</strong>gBox: 0 0 369 255<br />
%%Pages: 0<br />
%%EndComments<br />
/$F2psDict 200 dict def<br />
$F2psDict beg<strong>in</strong><br />
...<br />
%%EndProlog<br />
$F2psBeg<strong>in</strong><br />
...<br />
$F2psEnd<br />
23 While it is possible to construct a PostScript comm<strong>and</strong> which draws vector graphics, it turns out<br />
to be a “feature” of eps that is impossible to construct such a comm<strong>and</strong> for bitmapped graphics.<br />
Bitmapped graphics are usually converted to eps by hav<strong>in</strong>g the image (or colorimage) PostScript<br />
operators read the current file as data. It is not possible to put such constructs <strong>in</strong>to a PostScript<br />
procedure. It is possible to change the eps file so that it passes the image data as PostScript str<strong>in</strong>gs<br />
rather than read<strong>in</strong>g the file, but this is difficult to automate <strong>and</strong> generally requires a fair amount of<br />
h<strong>and</strong> edit<strong>in</strong>g of the PostScript.<br />
S<strong>in</strong>ce most people are not PostScript experts, h<strong>and</strong>-edit<strong>in</strong>g the PostScript is generally not an<br />
option. If the graphic can be described by PostScript vector primitives, it may be possible to use<br />
the kvec program (see page 19) to successfully convert the graphic to vector format.<br />
50