>>>>> "Albert" == Albert Astals Cid <[email protected]> writes:
Albert> Well i did it by empirical testing, get the pdf remove the Albert> /Matte[0 0 0] entry of the object 51 and see how the left "More Albert> Text Here TBD" in Adobe Acrobat is rendered with the exact same Albert> color we get in poppler. My compile is a bit long in the tooth (about 60 days); there must have been a relevant change in that time; I do not see a difference from overwriting /Matte [0 0 0] with spaces. Albert> Yep, looking at the formula for Matte color calculation it seems Albert> that Matte 0 0 0 should not affect rendering at all, Leonard can Albert> you shed some light here? >> The reply was, of course, supposed to go to bugz-d rather than the >> list. But since it was wrong, I’m not going to correct that.... Albert> ¿¿?? I meant that I was trying to post a comment to the bug via that email; the reply-to munging on the poppler-bugs list means that, to do that, I have to manually edit the To: in the reply. With the last part I meant that, since I can now see the difference the bug reported saw, the first paragraph of my reply was incorrect and therefore there was no point in re-sending the post to bugzilla..... >> So, to handle Matte, the ref says the SMask’s Width and Height have >> to match the primary image’s, Albert> What the spec doesn’t say is what one should do if they are not Albert> the same :-/ Indeed. The Right Thing To Do, given a pre-multiplied soft mask with a different pixel-size than the image it applies to, is complicated at best. (Except, of course, when the main image is an integer×integer multiple of the mask’s size, where resizing the mask to match the main image is trivial.) Incidently, for those reading along, c′ = m + α × (c − m) ımplies that as α varies ∈ [0,1], c′ varies ∈ [m,c]. So dealing with non-conforming PDF files will be the only difficult part. >> Should OutputDev::drawSoftMaskedImage() get another arg to pass the >> Matte array? Or should it be added to the GfxImageColorMap object? Albert> C++ way is having GfxSoftMaskImageColorMap subclassing Albert> GfxImageColorMap that adds the Matte entry. Makes sense. As you might guess, I’ve mostly been hacking in C of late. -JimC -- James Cloos <[email protected]> OpenPGP: 1024D/ED7DAEA6 _______________________________________________ poppler mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/poppler
