Enrico Forestieri wrote:
> BigG writes:
>> I have LyX 1.6.4 installed in cygwin on W2K, and LyXWindows 1.6.4 on W2K on
>> another box. When I
>> use beamerlyxexample1.lyx, warnings about missing graphics are generated.
> [...]
>> The PDF generated is fine, but missing the four knight images, and the ICSI
>> logo. This is what I
>> would expect. However, the relevant image files are actually there in the
>> same directory as
>> beamerlyxexample1.lyx. For example,
>>
>> $ ls -w 80 /usr/local/share/lyx/examples/beam*
>> /usr/local/share/lyx/examples/beamer-g4-mask.jpg*
>> /usr/local/share/lyx/examples/beamer-g4.jpg*
>> /usr/local/share/lyx/examples/beamer-icsi-logo.pdf*
>> /usr/local/share/lyx/examples/beamer-knight1-mask.png*
>> /usr/local/share/lyx/examples/beamer-knight1.png*
>> /usr/local/share/lyx/examples/beamer-knight2-mask.png*
>> /usr/local/share/lyx/examples/beamer-knight2.png*
>> /usr/local/share/lyx/examples/beamer-knight3-mask.png*
>> /usr/local/share/lyx/examples/beamer-knight3.png*
>> /usr/local/share/lyx/examples/beamer-knight4-mask.png*
>> /usr/local/share/lyx/examples/beamer-knight4.png*
>> /usr/local/share/lyx/examples/beamerlyxexample1.lyx*
>>
>> Why can't pdflatex find them?
>
> This is a known pgf bug:
> http://sourceforge.net/tracker/index.php?func=detail&aid=1336165&group_id=92412&atid=600660
>
> A patch has been proposed, but it has not still been applied:
> http://sourceforge.net/tracker/index.php?func=detail&aid=1447974&group_id=92412&atid=600662
>
The patch is defunct, as the source has now moved on somewhat. I've monkeyed
with
pgfcoreimage.code.tex and produced the following replacement for p...@findfile:
\def\...@findfile#1:#2+#3{%
\...@findfile@inner#1:#2+{\in...@path#3}
\ifx\...@filename\pgfutil@empty{
\...@findfile@inner#1:#2+{#3}
}
\fi
}
\def\...@findfile@inner#1:#2+#3{
\pgfu...@iffileexists{#3#1}%
{\PackageInfo{pgf}{Found file #3#1\MessageBreak}
\xdef\...@filename{#3#1}}%
{\PackageInfo{pgf}{Failed to find #3#1\MessageBreak}
\def\...@mightbeempty{#2}%
\ifx\...@mightbeempty\pgfutil@empty\else%
\...@findfile@inner#2+{#3}%
\fi
}
}
The idea is to do two searches; one with in...@path prepended, and one
without. (This is necessary to find *all* the required files.) Unfortunately, as
it stands it won't work. This is because in the TeX file which LyX produces,
the input path is defined by the following line:
\def\in...@path{{/usr/local/share/lyx/examples//}}
The problem is caused by the double braces. By the time the full path string is
passed to pgfu...@iffileexists, it looks like, for example,
{/usr/local/share/lyx/examples}beamer-knight1.png
The braces left behind invalidate the path.
So I have two questions:
a) is there a way in TeX to remove the outer pair of braces (I've tried all
sorts of tactics, but being a relative newcomer to TeX, I've failed.)
b) is there a good reason for the double braces to be there in the first place?
(I'm sure there is, but I thought I'd better ask anyway. If I edit one pair
away in the TeX file output by LyX, then my patch above seems to work fine.)
Bill Gordon
://sneakemail.com
