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martinberlin / lv_port_esp32-epaper

LVGL ported to ESP32 including various display and touchpad drivers. Forked to support parallel epaper displays (using EPDiy as a component) Supports also L58 touch controller used in Lilygo EPD47
https://www.tindie.com/search/?q=Kindle
MIT License
47 stars 11 forks source link

MODE_GC16 cannot show grayscales' color normally. #9

Closed lanistor closed 4 months ago

lanistor commented 2 years ago

Thanks for supply such an amazing library, really.

The grayscales' color cannot perform normally, had set enum EpdDrawMode updateMode = MODE_GC16.

Here is the demo:

using lv_port_esp32-epaper

The background color in the left side is set as #dddddd;

lv_port_esp32-epaper

epdiy' demo

epdiy

Here are these problems:

  1. Grayscales' color: #dddddd (the background color in the left side) seem to be #666666, and #eeeeee even cannot be show.
  2. The font has serious burrs, which epdiy hasnot.
  3. The render is really slow, nearly need 10 seconds to render the left-side-background, while epdiy's demo can render fullscreen in nearly one second.

So, why? Is the algorithmic problems with color mapping? And is there a possible way to resolve it?

Thanks very much.

martinberlin commented 6 months ago

Hi Lanistor, sorry I saw this quite late. I think at this point we advanced significantly in rendering times with epdiy v7 and your own improvements.

Please keep it open in case we need to discuss something more here otherwise you can close it.

martinberlin commented 4 months ago

Closing here since it seems old and by this point you would have figured out this one!

lanistor commented 4 months ago

Closing here since it seems old and by this point you would have figured out this one!

OK. sorry forgot to close it.