Rendering quality (color space issue?)

[nicoburns]

Hi! I see you updated the Blitz implementation - performance is looking good now!

However, I'm seeing not-great rendering quality. The screenshot below is with the Blitz renderer, but I'm actually seeing similar for all of the Blitz, Servo, and litehtml renderers (CEF failed to compile for me):

(Left: iced_webview_v2 with Blitz backend. Right: Blitz's "readme" app)

It almost looks to me like the texture is being resampled somewhere in the pipeline? Or rendered at a half-pixel offset? Or possibly being interpreted in the wrong color space? The text looks thicker, but also both text and images look darker (compare Iced logos).

Not sure if you're seeing the same, or if this is just on my screen. I'm running this on a MacBook M1 Pro macOS 15 (2x display scale factor).

---

EDIT: Actually, I just tried the email, and that makes it very obvious that the colors are being rendered completely differently:

(Left: iced_webview_v2 with Blitz backend. Right: Blitz's "readme" app)

[nicoburns]

Hmm... disabling Iced's web-colors feature makes the colors match, but the text is still a bit fuzzy:

(Left: iced_webview_v2 with Blitz backend. Right: Blitz's "readme" app)

[franzos]

Hi there, I appreciate your follow-up. With v0.1.9 I've done some work on (trying) to fix the issue with colors; I also found a small bug with litehtml rendering, doing the comparison with Blitz; I will continue on this when there's more time.

[nicoburns]

Nice!

I gave this a go and:

• The colors seem to be fixed
• Text/rendering now seems to be sharp in the webview and email examples
• However, the embedded_webview example is still fuzzy. Perhaps there is still some view/texture size mismatching specific to that example (where the webview notably doesn't take up the entire viewport).

As an aside, the latest versions of Iced (main branch) and Blitz (main branch or alpha) now agree on a WGPU version (v29), so it may be possible to start experimenting with rendering directly from a WGPU texture without roundtripping via the CPU (I believe to makes this work, the Blitz Vello instance would need to be initialized with the wgpu Device provided by Iced).

(I'm not sure what your intent is with this crate around crates.io Iced vs. main Iced)

[franzos]

However, the embedded_webview example is still fuzzy.

This should be fixed now.

the latest versions of Iced (main branch) and Blitz (main branch or alpha) now agree on a WGPU version (v29),

That's great! I played around with this a little on https://github.com/franzos/iced_webview_v2/tree/next. Only problem is that it doesn't align with Servo, so it's temporarily disabled; Once dependencies align, I'll promote it to the main branch.

[nicoburns]

I've been trying to prompt the Servo team to do more timely releases (currently they've been waiting on a blog post to be written): https://servo.zulipchat.com/#narrow/channel/263398-general/topic/April.20Release.20.28v0.2E2.2E0.29.20call.20for.20testing/with/597474651

I think I got agreement at the TSC meeting. But we'll have to see!

Either way there should be a new release soon.

[franzos]

Sounds awesome!