[poppler] color inversion for a mask image

[Leonard Rosenthol]

I can't speak to the Gfxstate, but there are keys in the image dictionary
(such as Decode) that relate to inversion.

Leonard

On 3/29/12 2:09 AM, "Ihar `Philips` Filipau" <thephilips at gmail.com> wrote:

>Hi All!
>
>I have encountered minor yet interesting problem. With the
>functionality I have recently added to pdftohtml, now also the mask
>images are extracted (as PNGs).
>
>In one document I have, one mask image is extracted with colors
>inverted: white is black, black is white. Yet, it is displayed by all
>the PDF viewers correctly.
>
>Is there any flag/etc in GfxState/etc which might be responsible for
>color inversion? the flag pdftohtml doesn't check yet?
>
>Thanks.
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