Hi Andy, Apologies for the delay...I have consulted with another designer here at OSTC and we think that if you pre-save images to 8-bit you should see better results. You can save images in png format in gimp for 8-bit output, or Photoshop CS5 and up will display the bits under Image > Mode. This will support transparency of 0 or 1 (on/off), but gradients will not look good because 16 or 32-bit gives a smoother transition.
I also asked a visiting engineer who is working with QT. He can't advise on which module to modify, and would actually recommend you to pre-convert all the artwork. He doesn't see much of a benefit to do this "live" while the system is running. It should be noted that dithering all artwork in the running system will incur (possibly negligible) performance penalties. Hope this helps! On 28 April 2015 at 18:02, Yang Andy <[email protected]> wrote: > Hi everyone > > I have developed IVI product based on TizenIVI3.0. > > There is a issue about screen quality because the Bitmap which is used to > render screen is 24 bit, > > but the display device only support 18 bit. > > So i think it is necsssary to implement dither in order to convert 24 bit > to 18 bit. > > I use QT platform to develop screen. > > Could anyone give some advice on how to implement dither?Which module > should be modified ? > > Best regards, > > Andy > > _______________________________________________ > IVI mailing list > [email protected] > https://lists.tizen.org/listinfo/ivi > > -- *Barbara Harmon* Graphics Developer - Infotainment *T:* 1.971.256.9733 X1033 *Email:* [email protected] <[email protected]> Jaguar Land Rover North America, LLC 1419 NW 14th Ave, Portland, OR 97209 ------------------- Business Details: Jaguar Land Rover Limited Registered Office: Abbey Road, Whitley, Coventry CV3 4LF Registered in England No: 1672070 This e-mail and any attachments contain confidential information for a specific individual and purpose. The information is private and privileged and intended solely for the use of the individual to whom it is addressed. If you are not the intended recipient, please e-mail us immediately. We apologise for any inconvenience caused but you are hereby notified that any disclosure, copying or distribution or the taking of any action in reliance on the information contained herein is strictly prohibited. This e-mail does not constitute an order for goods or services unless accompanied by an official purchase order.
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