LVGL 9 release

[dmazzella]

The LVGL library has been updated to version 9 the changes from version 8 are in the changelog and Arduino IDE 2 warns of the new version release but Arduino_H7_Video library does not yet support the new display registration mode at the moment, what is your timeframe for the update?

Thanks

[facchinm]

Hi @dmazzella ,
thanks for the heads up! I tried a quick 'n dirty porting, basic functionality is in place (see here and here ) but there's still work to be done due to the deprecation of sw_rotation flag (so Giga display shield only works in portrait mode).

@kisvegabor could you provide some insights on how the new lv_draw_sw_rotate API is supposed to work? The original draw_buf_rotate implementation is quite more sensitive on RAM (and transparent).

@leonardocavagnis since the plan is to release the core next week I'd proceed with adding an #error if LVGL_VERSION_MAJOR is 9, so at least there's a clean way to avoid the issues flood.

[kisvegabor]

Hi @facchinm,

@kisvegabor could you provide some insights on how the new lv_draw_sw_rotate API is supposed to work? The original draw_buf_rotate implementation is quite more sensitive on RAM (and transparent).

It really required 2 separate source and destination buffers now. Note that the "original draw_buf_rotate implementation" from LVGL v8 was dynamically allocating a smaller temporary buffer for rotation.

The current implementation is

• faster and cleaner
• more explicit (there is no hidden allocation)
• more flexible as you can provide any kind of destination buffer

• you can rotate the source buffer line by line, so you need only one line for the destination buffer.

[leonardocavagnis]

Dear @dmazzella,
LVGL v9 fix has been merged. It will be available in the next Core release.
Remember to update also the Arduino_GigaDisplayTouch library to version 1.0.1.