I'm unsure what exactly you're looking for. For a technical overview how blending changes the graphics model, the introduction from the pdf reference model is quite good [1] Basically, I would like blending to be as easy as opacity (they are very similar in behavior). An author shouldn't have to know the technical details how blending works. Instead, he should just be able to provide the blend mode on an element and that element (and it's content) should blend with the backdrop, again just like transparency. Proposal to add markup so you can manually construct the backdrop will prove very difficult to use and brittle. I've seen numerous examples where authors try to mimic blending either by rasterizing content to images in photoshop or by using transparency (which can only approximate 'screen' and it also make the artwork dark). 1: http://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/devnet/pdf/pdfs/PDF32000_2008.pdfchapter 11.2 On Wed, May 22, 2013 at 12:02 AM, Robert O'Callahan <robert@ocallahan.org>wrote: > It would still help if you could explain what the use-cases are. >
Received on Wednesday, 22 May 2013 15:35:26 UTC