Re: [GSOC 2022]: Integrate FreeType with alternative rendering engines

[Matsumura, George]

Greetings Anurag,

From what I could glean, rusttype uses the rust library 
ab_glyph_rasterizer for its rendering, which in turn uses the algorithm 
used by stb_truetype, which is described here:
https://nothings.org/gamedev/rasterize/

I hope this helps.

Regards,
    George

On 4/19/22 15:00, Anurag Thakur wrote:
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> Indeed! RustType looks like a good candidate for evaluation.  It also 
> appears to be using a different algorithm for rasterization, I'll read 
> more about it.
>
> Regards
> Anurag
>
> On 13-Apr-2022 12:18 AM, Bermler <freetype@protonmail.com> wrote:
>
>     rustType might be a good place to look at as well
>
>
>     https://github.com/redox-os/rusttype
>     
> <https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fredox-os%2Frusttype&data=05%7C01%7Cgm960420%40ohio.edu%7Cc713e67b919243c1ec1908da223711b7%7Cf3308007477c4a70888934611817c55a%7C0%7C0%7C637859917628696866%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=tVZn%2BJRNxtpFaVw8TI6v2oIzn5oSfJIwlXfPOBJdd1I%3D&reserved=0>
>
>
>
>     On Tue, Apr 12, 2022 at 12:20 PM, Anurag Thakur
>     <anurag105csec21@bpitindia.edu.in
>     <mailto:anurag105csec21@bpitindia.edu.in>> wrote:
>
>         Hello everyone!
>
>         I am Anurag Thakur, a first-year undergraduate student pursuing
>         Computer Science.
>
>         I am interested in contributing to the project *“**Integrate
>         FreeType with alternative rendering engines” *as part of GSOC
>         2022 and have been learning about it for some time.
>
>         Reading through the mailing list discussions and building on the
>         work of other contributors, I have been successful in creating
>         prototype renderer module for FreeType that
>
>         is based on the font-rs rasteriser. The renderer module is
>         written in C and is very barebones at the moment, since I wanted
>         to discuss with the community and wait for an official approval for
>
>         my proposal before investing too much effort in any particular
>         direction.
>
>         Since the parsing improvements of font-rs don’t completely apply
>         to FreeType due to the requirement of hinting etc., I have been
>         focusing on the rasteriser improvements, i.e., a dense data
>         structure
>
>         for storing the accumulation buffer, that is better suited for SIMD.
>
>         Having briefly studied the renderers mentioned at FreeType’s
>         GSOC page, I believe the best course of action would be to first
>         properly integrate a font-rs based renderer in FreeType
>
>         and then working on optimizing the implementation by studying
>         the code of font-go and fontdue.
>
>         I am currently studying the code of Fontdue and since it started
>         as a fork of font-rs I hope integration will not be too tough.
>
>         Pathfinder seems to be very different from the other renderers,
>         I need to study more about it, and will try to determine the
>         best way to integrate it with FreeType.
>
>         I am also working on a way to properly benchmark the different
>         implementations and would appreciate any pointers regarding it.
>
>         I would be grateful if the community could point me towards
>         other font-rendering implementations that could be of interest
>         to FreeType. Any research project or prototype that
>
>         can bring performance improvements is welcome.
>
>         Any other insights or guidance regarding this project would be
>         greatly appreciated.
>
>         I have submitted my draft proposal to the GSOC website, and
>         humbly request the mentors to take a look at it and provide
>         feedback.
>
>
>         Regards
>
>         Anurag