[cairo] Too-large transparency groups

[Adrian Johnson]

On 21/06/13 04:15, James Cloos wrote:
>>>>>> "AJ" == Adrian Johnson <ajohnson at redneon.com> writes:
> 
> AJ> The PS output blends alpha into white if there is nothing underneath.
> AJ> The PDF output preserves the alpha. PDF viewers blend the rasterized
> AJ> image into the page color.
> 
> Given that cups-filters cause apps to prefer sending pdf to cups, even
> when the printer is PS-only, and that pdftops and pdf2ps both raster the
> whole page and not just the small image, that leaves the bug in place.

Does CUPS provide any way to find out if PDF or PS is preferred? That
would be the easiest way to fix this bug.