Description
I see that support for LVGL v9 was added in commit 77983a0, however, the current release (v0.0.1) precedes this and depends on LVGL v8.x.
Users following the GIGA Display Shield 3D Engine Tutorial are instructed to install the LVGL library, and will unwittingly install v9.x by default. They will then be met with the 'LV_IMG_CF_TRUE_COLOR' was not declared exception, and novice users might not realize that this is due to the version difference in LVGL.
I opened Issue #2469 for that tutorial, advising that users be informed that a new release containing the LVGL v9 compatibility fix has not been published, and that they'll need to specify LVGL v8.4 to have success (or manually install the HEAD revision of this repo, or copy/paste the three new lines to their sketch).
...or maybe consider the easiest solution: releasing v0.0.2?