Hi Christophe, I refere to your code, that you posted earlier:
> if (vImageScale_ARGB8888(&buffer, &vDestBuffer, NULL, 0)) One thing that won't work is your vImage-Scalling algorithm, because you are using the ARGB variant (4 bytes per pixel) and putting in a RGB (3-byte per pixel) buffer with vDestBuffer. I thinkk this is why you are getting all those colors, because the vImage-scaling scales an 4 byte pixel into a 3 byte pixel which won't work. Maybe you should post your code again here, so we can have a closer look at your current implementation. best, Achim Breidenbach Boinx Software Ltd. On 08.11.2012, at 18:09, Christophe Leske wrote: > Hi there, > > I got it to work - I got a patch that sends pixeldata from a QC image over > the wire to another computer. > > I am running into another problem now though - the image on the target > computer is showing color banding (see screenshot at > http://www.multimedial.de/share/ColorBanding.jpg) > > Data flow is from RIGHT TO LEFT in the image ! > > Right being Quartz Composer, left being a remote desktop connection to the > target windows machine which reconstitutes the image. > > > Now as you can see, the image shows some severe color banding. This seems to > be related to the color format either used by Quartz Composer (what are > internal images converted to?) and/or the image format of the vImage_Buffer > used for scaling the image to my target size. > > I am not using planar mode for colors in the image, yet it seems as if this > is what is being used. Also, the image is not scaled down, but rather > stretched... > > Any help is much appreciated. I can also share the code, but do not want to > litter the list here with my crude code I got so far... > > > Thanks for any help, > > -- > Christophe Leske > multimedial.de > > ---------------------------------------- > www.multimedial.de - [email protected] > Hohler Strasse 17 - 51645 Gummersbach > +49(0)2261-99824540 // +49(0)177-2497031 > ---------------------------------------- > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Quartzcomposer-dev mailing list ([email protected]) > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/quartzcomposer-dev/achim%40boinx.com > > This email sent to [email protected] _______________________________________________ Do not post admin requests to the list. They will be ignored. Quartzcomposer-dev mailing list ([email protected]) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/quartzcomposer-dev/archive%40mail-archive.com This email sent to [email protected]
