Replicant

Some Replicant-supported devices have a pretty high screen resolution which makes the devices slow with the software renderer. The display drivers usually don't allow to set a lower screen resolution.

Making the display drivers work with a lower screen resolution would lead to a smaller framebuffer which in turn would greatly improve graphics speed.

A possible approach could be to reduce the resolution in one or both dimensions by half and using the pixel values for one pixel in the framebuffer for two or four screen pixels. This way a simple scaling mechanism could be implemented.