[cups] Trying to work around Canon MF743cdw driver bugs on MacOS Catalina

[Brian Demsky]

Thanks.  Here it is.  Apologize for the compression, but the list has a size limit on posts.  The defective program appears to be the (binary) file capdftopdl.

Brian

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> On May 15, 2020, at 1:11 AM, Helge Blischke <helgeblischke at web.de> wrote:
> 
> 
> 
>> Am 15.05.2020 um 08:48 schrieb Brian Demsky <bdemsky at gmail.com>:
>> 
>> I recently bought a Canon MF743cdw printer, and their drivers have issues with printing a bunch of pdfs either via Preview or lpr.  It prints empty boxes instead of characters from several fonts.  The fonts are all embedded into the PDF, so it should not be a system font issue.
>> 
>> If I grab the input file to the canon cupsFilter (from the spool directory), it renders fine on Preview or Adobe Acrobat.  So it seems that it is a Canon issue.  
>> 
>> The pdf file prints okay on Acrobat and also prints okay if I use Preview to convert them to TIFF files and then print those.
>> 
>> Getting Canon to do anything about their driver bug appears very difficult and their tech support just blames the bug on Apple.
>> 
>> So I’m wondering if there is a way to hack the PPD file to render the PDF into a bitmap file, then back to a PDF, and then through the Canon driver filter.  Or some other conversion that will change the PDF files enough that the printer driver can print it.
>> 
>> Thanks,
>> Brian
>> _______________________________________________
> 
> Please post your printer’s PPD (as a .txt file to prevent the attachment from being deleted by the mailing list).
> With that PPD I could set up a fake printer to test other document formtats (such as PostScript, cups-raster, peg-raster etc.)
> 
> Helge
> 
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