On Fri, Dec 23, 2016 at 12:00 AM, Tor, the Marqueteur Marqueteur@fineartmarquetry.com wrote:
I was reading through the recent archives, and the question of displays and upsampling caught my eye.
On list it was noted that upsampling is an expensive operation (and it certainly is), but I'm not sure it has to be.
turns out that there's line-buffer ICs rather than full framebuffer, which will be cheaper.
As I recall, most LCDs when driven with a lower resolution than native, will simply repeat interspersed rows/columns as needed to fill the display. It looks dreadful, but it works.
.. but they need to be scaled on an arbitrary basis on both row *and* column. so you need at least a line-buffer to store a couple of rows so that you can use samplerate conversion on y coordinates as well as x.
Alternatively, is there any reason a display for type I couldn't be set to recognize a type II 1366x768 and display it in the centre of the display to avoid artifacts?
bleuch :) it's not unreasonable but i think you'd find that users complain a lot!
Or should such a display have a button to switch modes so that it can display full screen with anything?
honestly i don't care: if people want to make Housings that do that, it's up to them: market forces will decide whether their product is successful or not.
l.