It would be nice to add a constructor which wraps an existing Skija Canvas without first explicitly creating a Surface. With such a constructor this code could be used in conjunction with Jetbrains Compose. Compose can provide you with a NativeCanvas object which is just a type alias for org.jetbrains.skija.Canvas and if you could wrap that you could use all your AWT rendering stuff in the context of Jetbrains Compose. This also needs some changes or disabling of the create method.

The original dependency on Skija was recently updated to a fork of Skija. I would suggest looking into switching to Skiko instead - which is Jetbrains' replacement for Skija, and is being used as the graphics foundation of Compose for Desktop.

Upsides:

• if the goal is to enable usage of chart libraries in Compose for Desktop, then Skiko is the right dependency to have
• continued, ongoing investment from Jetbrains into the library
• can remove a bunch of null assertions and tests as nulllability is built into Kotlin

Downsides

• requires switching to Kotlin instead of Java, as Skiko is Kotlin bindings to Skia
• bigger dependency footprint, as Skiko contains more than just Skia bindings

I have https://github.com/kirill-grouchnikov/skijagraphics2d/commit/aa8eab27524393b4f75a0c8ae3246b0e79296bc5 as proof of concept. What it has:

• switching to use Kotlin. Note that the translation is automatic, and there's a lot of cleanup to be done to make the code look Kotlin native
• switching to use Skiko 0.6.6. Note that the latest is 0.7.2, but I didn't want to look too deeply into the specific dependencies that are needed. Right now I'm just hardcoding skiko-jvm and skiko-jvm-runtime-macos-x64 in there
• some tests still fail. I started "fixing" the tests, but it's just tedious, as most of those still failing are around nullability checks and are not relevant in the world of Kotlin

Note that this is a proof of concept for your consideration. If you decide to go down that road, I can help with questions, but I'm not going to own the full switch to Skiko.

Great project! I have tried to convert some java2D graphics directly via skija with SkijaGraphics2D, but the external dll cannot be loaded even if extracted OK in the temp directory. I have compiled SkijaGraphics2D with ant by manually resolving dependencies, slf4j-api, slf4j-simple, types and skija from humbleui and skija at the maven version 0.98.1 and the latest 0.100. Same results for both.

COMPILE SkijaGraphics2D (windows skija version): This line of code in netbeans shows an error:

SkijaGraphics2D.java

            // needs clojure library dependency ????????????
            this.canvas.drawRect(Rect.makeXYWH((float) r.getX(), (float) r.getY(), (float) r.getWidth(), (float) r.getHeight()), this.skijaPaint);

then after a bit of search I have seen that it needs clojure library also. So after resolving closure depedancy compiles OK.

Then after loading all libs in order to use them, in the sense of what I see I the test -->

           // Test SkijaGraphics2D...
            this.g2 = new SkijaGraphics2D(10, 20);

RUNTIME: I get this error even before parsing any code to the next level, stops at loading the external dll, the skija.dll and icudtl.dat file is there,

Exception in thread "AWT-EventQueue-0" java.lang.UnsatisfiedLinkError: Can't load C:\Users\...\AppData\Local\Temp\skija_0.98.1\skija.dll
	at java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:1793)
	at java.base/java.lang.System.load(System.java:672)
	at io.github.humbleui.skija.impl.Library.load(Library.java:73)
	at io.github.humbleui.skija.impl.Library.staticLoad(Library.java:47)
	at io.github.humbleui.skija.Surface.<clinit>(Surface.java:10)
	at org.jfree.skija.SkijaGraphics2D.<init>(SkijaGraphics2D.java:214)

Adding dependency by Gradle:

implementation("org.jfree:org.jfree.skijagraphics2d:1.0.3")

Dependency output:

+--- org.jfree:org.jfree.skijagraphics2d:1.0.3
|    +--- org.jetbrains.skija:skija-${skija.platform}:0.92.22 FAILED
|    +--- org.slf4j:slf4j-api:1.7.32
|    \--- org.apache.logging.log4j:log4j-slf4j-impl:2.14.1
|         +--- org.slf4j:slf4j-api:1.7.25 -> 1.7.32
|         \--- org.apache.logging.log4j:log4j-api:2.14.1

Expect:

org.jetbrains.skija:skija-linux:0.92.22

Error:

> Error while evaluating property 'filteredArgumentsMap' of task ':compileKotlin'
   > Could not resolve all files for configuration ':compileClasspath'.
      > Could not resolve org.jetbrains.skija:skija-${skija.platform}:0.92.22.
        Required by:
            project : > org.jfree:org.jfree.skijagraphics2d:1.0.3
         > Could not resolve org.jetbrains.skija:skija-${skija.platform}:0.92.22.
            > Could not get resource 'https://maven.pkg.jetbrains.space/public/p/compose/dev/org/jetbrains/skija/skija-$%7Bskija.platform%7D/0.92.22/skija-$%7Bskija.platform%7D-0.92.22.pom'.
               > Could not GET 'https://maven.pkg.jetbrains.space/public/p/compose/dev/org/jetbrains/skija/skija-$%7Bskija.platform%7D/0.92.22/skija-$%7Bskija.platform%7D-0.92.22.pom'. Received status code 400 from server: Bad Request
         > Could not resolve org.jetbrains.skija:skija-${skija.platform}:0.92.22.
            > Could not get resource 'https://packages.jetbrains.team/maven/p/skija/maven/org/jetbrains/skija/skija-$%7Bskija.platform%7D/0.92.22/skija-$%7Bskija.platform%7D-0.92.22.pom'.
               > Could not GET 'https://packages.jetbrains.team/maven/p/skija/maven/org/jetbrains/skija/skija-$%7Bskija.platform%7D/0.92.22/skija-$%7Bskija.platform%7D-0.92.22.pom'. Received status code 400 from server: Bad Request