Code pre gfx3/15/2024 Update: Some minor bugfixes, SPI drivers are refactored to use a common base, more drivers are now added, and one click configuration for generic ESP32 boards is now available Without a driver, it can only draw to in memory bitmaps, but once you add a driver to the mix, you can draw directly onto displays the same way you do to bitmaps. It's basically standard C++, and things like line drawing and font drawing algorithms. GFX on the other hand, isn't tied to anything. Also, being tied to the Arduino framework, it can't take advantage of platform specific features that increase performance, like being able to switch between interrupt and polling based SPI transactions on the ESP32. It's very minimalistic, not very optimized, and doesn't have a fully decoupled driver interface. The most popular is probably Adafruit_GFX, but it's not optimal. I wanted a graphics library that was faster and better than what I had found for various IoT devices. Download library and demo project - 4.9 MB.
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