GSoC Update: Replacing Slideshow Metafile Rendering with Primitives

[Shardul Vikram Singh]

Hi everyone

Here is a quick update on what I did last week

I started by fixing GIF animations, which weren’t working with primitives -
only a static image of the first frame was shown. After some debugging, I
realized the primitive renderer does support GIFs; I just needed to pass
the time value via ViewInformation to the primitive processor. I fixed this
by adding a timer to the DrawShape class.

Next, I noticed that many animation effects weren’t working with text. On
inspection, I found that several effects rely on subsetting text shapes -
splitting them into paragraphs, words, or characters, and rendering each
part separately. This enables effects to animate each
paragraph/word/character sequentially, instead of the entire text block at
once.

I had completely overlooked this subsetting aspect until now, so it took a
bit of time to understand. I’ve implemented paragraph-level subsetting
using primitives, which was fairly straightforward. However, the existing
metafile-based implementation does a lot more (including per-character and
per-word subsetting) and can exclude the subsetted part from the original
shape. I’ll be working on implementing that next.

I’m also beginning work on moving sprite-related code out of the canvas and
into VCL. I don’t have much progress there yet, but I’ll share more updates
soon.
That’s it for now!

Best,
Shardul
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