--- Comment #18 from Luis Bernardo <> ---
Created attachment 28988
patch to disallow multiple image filters

Adobe Reader fails to display the submitted examples when the raw png image
loader is used, even though they seem valid according to the spec, and are
correctly displayed by evince, ghostscript and Preview (Mac OS X PDF viewer).
The Adobe Reader issue only happens if the filter flate is turned on and seems
to be due to the fact that Adobe Reader may not like more than one filter
applied to an image. Multiple filters applied to a stream are valid, but are
also used by PDF malware exploits (like zip bombs). I suspect this is the
reason why Adobe Reader does not like them.

The patch fixes this problem by only using one image filter even when the
default flate filter is turned on.

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