PALE, Canvas, and Stuff demos

~1450 words. ~7 minutes.

In-tree PALE days (tiling)
Separate PALE repository (tiling)
Canvas API
- PALE
- ob-canvas

The various demos relating this were seriously getting out of hand. I hope to properly demo them, and provide some background.

I will try to keep improving and updating this page regularly.

In-tree PALE days (tiling)

PALE stands for “Picture and Animation Library for Emacs”, it grew out of struggles with rendering in Emacs Reader. Wherein quickly changing the page image would lead to memory leaks– the reason for the delay in implementing text-features (like selection and friends). We eventually decided that ‘tiling’ that is, dividing the page into smaller images would be a good solution, (though we ended up finding an easier to implement solution later).

PALE rendering a bouncing square.

PALE rendering gradient animations

Pale rendering 20 bouncing squares inside an Emacs buffer.

Emacs playing the video of RMS singing the hacker song using PALE.

Separate PALE repository (tiling)

Divya was so excited by PALE's video playing that he just extracted PALE into a separate repository.

PALE rendering smooth in 30 FPS without major flickering.

bad apple video playing in an emacs buffer.

Canvas API

Minad (Daniel Mandler) saw Divya's posts, and basically said,

wow, that is so much work, actually I had an idea to add a canvas into Emacs long ago, let me just do that: here is a patch.

funny animation with a lot of colored rectangles and emacs logos appearing everywhere, with a red falling star-like streak appearing in the background, chaos.

funny animation with a lot of colored rectangles and emacs logos appearing everywhere, with a red falling star-like streak appearing in the background, chaos. With a FPS counter at around 400 at the bottom (minibuffer).