On Wed, 6 Mar 2019 13:44:39 +1100 Graeme Gill <grae...@argyllcms.com> wrote:
> Pekka Paalanen wrote: > > Sebastian's protocol proposal includes render intent from applications. > > Conversion of client content to the blending space should ideally be > > lossless, so the render intent in that step should be irrelevant if I > > understand right. How to deal with render intent when converting from > > blending space to output space is not clear to me, since different > > windows may have different intents. Using the window's intent for the > > window's pixels works only if the pixel in the framebuffer comes from > > exactly one window and not more. > > Conceptually the conversion from source space to destination > is a single step, with a single intent. So conceptually any > conversions after this for the purposes of blending don't > have to pay any regard to intent - it's already applied. > > Blending could convert from the device space back > to XYZ, blend, and then convert back to device space. > It would use whatever intent is appropriate for blending > purposes, i.e. probably Relative Colorimetric. > But I doubt this is the best approach. (see my previous > post on blending.) Hi Graeme, yes, you're right. I wrote that before I understood that the destination space can also be used for blending, it only needs to be linearized. Thanks, pq
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