Wrt a standalone Skia program, we did make a test tool to render with Skia so we could compare rendering from the original svg to rendering the COLR v1 font version of it. https://chromium-review.googlesource.com/c/chromium/src/+/2282815 shows it.
Cheers, Rod S. On Thu, Jan 14, 2021 at 7:57 AM Werner LEMBERG <w...@gnu.org> wrote: > > Dominik, > > > I've just merged the 'colr' branch to master (with some minor tweaks > as discussed) and pushed it to the FreeType git repository at > > https://gitlab.freedesktop.org/freetype/freetype > > Let's see whether mirroring to Savannah works as expected... > > >> (1) How can your code be tested? It should be eventually fuzzed, > >> too. > > > > Currently we have a test pipeline as part of > > https://github.com/googlefonts/nanoemoji that builds a COLRv1 font > > from SVG images, [...] > > OK. > > >> (2) Is a test font already available? In this case, could you > >> contribute code to Armin's repository to enable fuzzing? > >> > >> https://github.com/freetype/freetype2-testing > > > > Yes, as Rod explained COLRv1 fonts are available here: > > https://github.com/googlefonts/color-fonts/tree/master/fonts. > > Thanks. > > > While developing, I made a simple test that traverses the graph of a > > COLRv1 font using FreeType API and outputs the retrieved data. I > > will contribute a fuzzer to freetype2-testing for COLRv1 based on > > that code in order to exercise the COLRv1 API in fuzzing. > > Great! > > > We are aiming for having prototype-level support for COLRv1 in > > Chrome soon (behind a flag). > > Please inform us as soon as such a Chromium build is publicly > available! > > > Unfortunately, I don't think we can provide a Qt application, as > > this would require new rasterization (on top of the FreeType API), > > and we focus on the rasterization implementation in Skia. > > Qt was just an example – a stand-alone Skia program would be as > nice :-) > > > In addition, I have one more change that I found while working on > > the Chromium COLRv1 prototype: > > > https://github.com/drott/freetype2-colr/commit/d71b1d8240075ce5421103efc0387f2dbe0e3aaf > > / branch colrTablePresenceChecks > > Ah, I forgot to merge this; will add it soon. > > > Werner >
