[OS X TeX] pdfcrop and white equations?

[Herbert Schulz]

On Oct 2, 2008, at 10:38 AM, Peter Dyballa wrote:

>
> 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?
>
> --
> Greetings
>
>  Pete
>
> These are my principles and if you don't like them... well, I have  
> others.
> 				- Groucho Marx
>
>
>
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Howdy,

Interestingly, LaTeXiT comes up with a warning dialog box about a  
possible problem from a bug in gs when dealing with white on white. It  
is possible to permanently dismiss this warning so you may no longer  
see it.

Good Luck,

Herb Schulz
(herbs at wideopenwest dot com)