[OS X TeX] pdfcrop and white equations?

Peter Dyballa Peter_Dyballa at Web.DE
Thu Oct 2 17:38:32 CEST 2008

Am 02.10.2008 um 00:09 schrieb david craig:

> it seems as if there may be a problem with pdfcrop and white equations

I tried to create LaTeXiT like LaTeX files and change the text colour  
to white – on white background. Both pdfTeX and XeTeX (with  
xdvipdfmx) optimised the invisible text to nothing – a clever choice.  
So GPL Ghostscript 8.61 reports:

	   **** Warning:  File has an empty MediaBox. Using the current page  
size instead.
	   **** Warning:  File has an empty MediaBox. Using the current page  
size instead.
	%%BoundingBox: 0 0 0 0
	* Page 1: 0 0 0 0
	%%HiResBoundingBox: 0.000000 0.000000 0.000000 0.000000
	   **** This file had errors that were repaired or ignored.
	   **** The file was produced by:
	   **** >>>> Mac OS X 10.4.11 Quartz PDFContext <<<<
	   **** Please notify the author of the software that produced this
	   **** file that it does not conform to Adobe's published PDF
	   **** specification.

When I change via the LaTeXiT colour button the text colour to white,  
a form pops up explaining this behaviour of Ghostscript. It  
recommends to enlarge the margin ... Adobe Reader 9 sees the change.

By using \pagecolor{cyan} I can see the formula's white text – at  
10pt or less and not at the usual size. And this behaviour survives  
when I change the white text colour to some grey – obviously the  
width of the formula is reported as page-wide. Putting the formula  
into a box with a coloured background seems to be more sane. I'll  
have to investigate this a bit later ...

How did you change the text colour? Which preamble and which text did  
you try to use?



These are my principles and if you don't like them... well, I have  
				- Groucho Marx

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