GeezerVison is showing github.com — Use Skija (Java bindings to Skia) as a renderer · Issue #151 · processing/processing4
Use Skija (Java bindings to Skia) as a renderer #151DescriptionCreated by: suyashcjoshi
Feature Request
I came across this awesome graphics library (shiny new from folks who build IntelliJ) that can perhaps be used to replace the current graphics library.
Have a look at the project README for examples - https://github.com/JetBrains/skija/ They mentions support for the following formats:
- Bitmap (Canvas)
- OpenGL
- Metal (example pending)
- Vulkan (in future)
Activityprocessing-bot commented on Nov 20, 2020 CollaboratorAuthor More actions In GitLab by @micycle1 on Nov 20, 2020, 13:33
This looks quite interesting, but it's possibly more comparable to Processing itself, than as a rendering mode for Processing. processing-bot commented on Nov 20, 2020 CollaboratorAuthor More actions Created by: benfry
This looks like a promising project, and potentially in better shape than the current mess in Java2D or JavaFX.
The path for implementing this would first be someone creating a Processing Library that makes use of it, and then over time, improving that to the point where it could be included as part of the core libraries.
(Edited for clarification) processing-bot commented on Nov 20, 2020 CollaboratorAuthor More actions In GitLab by @micycle1 on Nov 20, 2020, 23:43
I've just made a proof-of-concept here which plugs in to Processing's OPENGL mode, allowing calls to Skija bindings to draw in to the Processing sketch.
The next step would be to wrap up Skija bindings into some sort of PGraphicsSkia to create a Processing Skia renderer whose API matches Processing's existing renderers. processing-bot commented on Nov 21, 2020 CollaboratorAuthor More actions Created by: suyashcjoshi
Awesome..can't wait to try myself! processing-bot commented on Nov 30, 2020 CollaboratorAuthor More actions Created by: tonsky
it's possibly more comparable to Processing itself, than as a rendering mode for Processing
Hi, I am author of Skija :) I would say Skija is more like java.awt.Graphics2D or javafx.scene.canvas.GraphicsContext, and I think it might make a great rendering backend for Processing 4. Hard Skija dependencies are Java 11 and OpenGL context (optionally, it can render into bitmap too, but slower).
Happy to clarify further or dive into details. Feel free to ask anything or let me know if you need something supported, I will be happy to help. processing-bot commented on Dec 1, 2020 CollaboratorAuthor More actions In GitLab by @micycle1 on Dec 1, 2020, 13:25
@tonsky
Ok, here's a question: I was testing performance when rendering circles and ellipses across Processing's extant OPENGL mode (P2D), Skija (using the JOGL stage created by Processing, via processing-skia) and Processing's JavaFX renderer.
Performance is more-or-less the same between P2D and Skija (while JavaFX was much better). Is this what you'd expect? Alsom would Skija see performance gains by using a different backend (lwjgl for example)? processing-bot commented on Dec 1, 2020 CollaboratorAuthor More actions Created by: tonsky
Is this what you'd expect?
No, it should be on par with JavaFX at least, hopefully faster (at least it was when I was testing with clipping arbitrary shapes and shadows).
Can you give a rough estimate of what your scene looked like? How many circles, how big, were they transparent, that sort of thing?
Also, what machine did you test it on? Did it have a graphics card?
Alsom would Skija see performance gains by using a different backend (lwjgl for example)?
Probably not, as long as it’s OpenGL it shouldn’t matter. Metal might show different results (better or worse). processing-bot commented on Dec 1, 2020 CollaboratorAuthor More actions In GitLab by @micycle1 on Dec 1, 2020, 23:08
Can you give a rough estimate of what your scene looked like? How many circles, how big, were they transparent, that sort of thing?
10000 circles; radius = 4; this paint: Paint().setColor4f(new Color4f(0, 0, 0)).setAntiAlias(true); Windows 10; RX 5700
~55fps P2D; ~70fps Skija; ~300fps FX2D
processing-bot commented on Dec 3, 2020 CollaboratorAuthor More actions processing-bot commented on Dec 16, 2020 CollaboratorAuthor More actions Created by: tonsky
I finally wrote some benchmarks to compare Skija and JavaFX more closely.
In short: on some tasks, JavaFX is faster (drawing primitives, gradients, filling simple English text), while terribly slow on others (clips, shadows). I also encountered couple of problems (working with text, vsync, scaling, etc).
I guess there’s no right answer ¯\_(ツ)_/¯
Full details & how to repro here https://github.com/tonsky/java-graphics-benchmark#benchmarks processing-bot commented on Dec 18, 2020 CollaboratorAuthor More actions In GitLab by @micycle1 on Dec 18, 2020, 18:47
Cool. Any idea why Skia is so slow with rendering primitives by comparison? Is it overhead or something else? processing-bot commented on Dec 18, 2020 CollaboratorAuthor More actions Created by: tonsky
There’s some overhead in how JNI in Skija. JavaFX does batching for JNI calls. After that, on OpenGL side, I have no idea what’s going on. processing-bot commented on Jan 17, 2021 CollaboratorAuthor More actions Created by: benfry
Thanks for sharing your thoughts, @tonsky. Very helpful context. processing-bot commented on Jan 17, 2021 CollaboratorAuthor More actions Created by: benfry
For anyone interested in doing this, the route would be to create a renderer (ala PGraphicsJavaFX or PGraphicsOpenGL and others) that instead draws using Skijia.
Starting with PGraphicsJava2D would probably be easiest. You'd also need to create a PSurface object that works with Skijia to handle windows and mouse/keyboard input (or pass those through to a modified PSurfaceAWT if Skijia is set up to play nicely with AWT). processing-bot commented on Jun 18, 2021 CollaboratorAuthor More actions Created by: benfry
Closing this one for now since it's better handled in a third party (contributed) Library, at least to start. Could be fun but not something I have time for at the moment. processing-bot commented on Jul 19, 2021 CollaboratorAuthor More actions Created by: github-actions[bot]
This issue has been automatically locked. To avoid confusion with reports that have already been resolved, closed issues are automatically locked 30 days after the last comment. Please open a new issue for related bugs. locked as resolved and limited conversation to collaborators on Sep 18, 2024
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