On Wed, Jul 28, 2010 at 5:11 PM, Frank Richter <[email protected]> wrote: > On 28.07.2010 09:36, Damjan Jovanovic wrote: >> thumbnails that are missing on every startup. But even if this is >> acceptable solution, it's still hard to implement, because the >> thumbnail cache spec requires specific thumbnail sizes (128x128 or >> 256x256) and a special pixel format (256 colour indexed-mode PNG IIRC) > > Differing sizes are no problems. Prominent example: if you have picture > with an aspect ratio other than 1, the thumbnail won't be square. The > file managers usually handle that quite fine ... > > The spec actually says that thumbnails for small images don't have to be > saved; though in practice I'd expect that a 32x32 sized thumbnail shows > up as 32x32 (and not scaled up or so). > > Colors: spec says “it must be a 8bit, non-interlaced PNG image with full > alpha transparency”. It's somewhat ambiguous, but indexed colors seem > unlikely - 32bit RGBA images (ie 8 bit per channel) is what every > thumbnailer practically creates. > > Link for above info: http://jens.triq.net/thumbnail-spec/creation.html > > -f.r. > > > > >
The PNG thumbnail attributes are the problem then. They require WIC to support metadata writing, which Wine's doesn't atm. Damjan
