depthcharge was: Ignoring pdftex primitives

[Taco Hoekwater]

David Carlisle wrote:

It's so much fun ;-) 
For the original author: 

	\pdfimage depth 15pt \noex..... etc 

also works, but

	\pdfimage depth 15pt\noex.... 

doesn't, because the scanner eats one of the \noexpands when trying to 
find the space after "pt" 

	\pdfimage depth 15pt\relax\noex.... 

does not work because once again this sets the filename to "", and

	\pdfimage depth 15pt\noexpand\noex...

is also OK.

For David:

you need three \noexpands because TeX is looking for three keywords in
a loop that does not end until all three keyword searches return
"false". You won't need more \noexpands until TeX can do typesetting
in 3-d or colored rules, I guess. But for other images you need less:

"widthcharge.png" needs only 1 \noexpand, "heightcharge.png" needs 2
(but more \noexpands don't do any harm). "./heightcharge.png" needs
none, of course, but that's not portable across filesystems.

Greetings, Taco