Imagining the UI I'd want for a somewhat-modernized dumbphone...

I'd want something single-handed & power-efficient which promises a minimalist on-the-go featureset, without sacrificing ease of texting! That's my goal.

You'd operate it using a joystick (doubles as a D-Pad) & 2 additional buttons (typically for "Back" & "New"). The joystick would serve as a keyboard, when you move it in loops according to onscreen labels.

The UI would be menus of your texts, contacts, files, etc.

1/?

I wonder: Would there be a market for the machines I enjoy designing?

Here's the ones I've designed:

a) A machine redesigned from the silicon on up specifically for securely communicating over the (somewhat as-is) internet. Should be serviceable for media creation, though video would be a slight stretch.

Includes a user-accessible database-filesystem.

b) A RISC-V machine running off an SD card or 2, or booting into a bespoke Lua interpreter.

Has a straightforward I/O memory map.

1/2!

GRUB includes multiple blitting routines, & a wrapper branching upon the blending operation & both image formats to invoke the appropriate implementation. These serve to copy or blend pixels from a bitmap over to a rectangle within a target framebuffer.

In each of the numerous cases this involves some offset calculations, an outer loop over the Y axis, an inner loop over the X axis, & actually copying the data over. Possibly with format conversion and/or colour blending.

1/1 Fin for today!