I added a "-s" command line option to both ftview and ftgrid to swap rsvg out
with skia and run the same binary twice, one with "-s" and one without, just to
look at them side by side. Fixed the pixel positioning discrepancies. Patch
posted online below.
I think skia is marginally faster. Also, looking at them side by side, it seems
that rsvg+cairo has a tendency of having very pale extra edge pixels compared
to Skia's. It is almost as if Skia's svg rendering has a grid-fit/auto-hinting
option. As a result, skia-generated color bitmaps has a cleaner look, and often
a pixel narrower and shorter too.
The "cleaner" look might be a side-effect of optimization - doing rendering at
1/4 pixels precision or color quantization to 6x6x6 club, for example, can
probably go faster than arbitrary precision in color and positioning.
The patch is as below. I don't advertise it, but FontVal-extra/binary-archive
on github have rpm's built for fedora 38 I used myself, and have the fontval
diff patched in etc. I am thinking of rebuilding my system ftview/frgrid with
this patch. If it happens, the rpms will land there.
On Thursday, 13 July 2023 at 04:04:38 BST, Hin-Tak Leung
<ht...@users.sourceforge.net> wrote:
> will probably post this up at
> https://github.com/HinTak/harfbuzz-python-demos/ under a new directory
> "skia-adventure" and write there. Thanks for reading this far :-).
>
