Hi everyone,

I was wondering if there is any possibility to make skija wordking with java 8 please ? Maybe a trick or something ? I need to swith to java 11, but due to some legacy code, i still need to wait a bit and i would love to try make skija working with my java 8 app.

Thank's a lot.

I tried to run skija in a modular maven project. But the native resources (*.dll, *.so) can't be reached from the shared lib via

URL url = Library.class.getResource(resourcePath + fileName); `

The Library.class is part of the skia-shared-x.x.x.jar and the native plattform libs are separated into skia-${platform}-x.x.x.jar

It is necessary to manually extract the native files to the root of the project or to the src.main.resources folder.

A workaround could be to add a empty class file 'Native.class' into each skia-${platform}-x.x.x.jar and add a load from resource method into Library::_extract(..) like:

Native.class.getResourceAsStream(resourcePath + fileName);

Closing the window of the Clojure example causes JVM crash on MacOS. I ran it with clj -J-XstartOnFirstThread -M -m lwjgl.main. Log attached.

hs_err_pid6917.log

Yes launching shadow jar from ITerm lead to

Unhandled exception Type=Segmentation error vmState=0x00040000 J9Generic_Signal_Number=00000018 Signal_Number=0000000b Error_Value=00000000 Signal_Code=00000001 Handler1=000000000A895340 Handler2=0000000006668C80 InaccessibleAddress=0000000000000000 RDI=000000000C980A00 RSI=0000000000000000 RAX=0000000000000404 RBX=0000000000000000 RCX=0000000000000410 RDX=0000000000000000 R8=0000000000000000 R9=0000000000099454 R10=00007FA11700E058 R11=00000000476D1344 R12=0000000000000000 R13=0000000000000000 R14=000000000C980A00 R15=0000000000000000 RIP=000000000A89DDE0 GS=0000 FS=0000 RSP=000070000957DE00 RFlags=0000000000010246 CS=002B RBP=000070000957DEA0 ERR=0000000000000004 TRAPNO=000000040000000E CPU=0000000000040000 FAULTVADDR=0000000000000000 XMM0 0000000000000000 (f: 0.000000, d: 0.000000e+00) XMM1 0000000000000000 (f: 0.000000, d: 0.000000e+00) XMM2 000e1781000e1781 (f: 923521.000000, d: 1.959708e-308) XMM3 0000000000000000 (f: 0.000000, d: 0.000000e+00) XMM4 0000000000000000 (f: 0.000000, d: 0.000000e+00) XMM5 0000000000170000 (f: 1507328.000000, d: 7.447190e-318) XMM6 3fc29552f81ff523 (f: 4162843904.000000, d: 1.451820e-01) XMM7 402e7f9c1e980fa9 (f: 513281952.000000, d: 1.524924e+01) XMM8 0000000000000000 (f: 0.000000, d: 0.000000e+00) XMM9 0000000000000000 (f: 0.000000, d: 0.000000e+00) XMM10 0000000000000006 (f: 6.000000, d: 2.964394e-323) XMM11 0000000000000008 (f: 8.000000, d: 3.952525e-323) XMM12 0000000000000000 (f: 0.000000, d: 0.000000e+00) XMM13 0000000000000000 (f: 0.000000, d: 0.000000e+00) XMM14 0000000000000000 (f: 0.000000, d: 0.000000e+00) XMM15 0000000000000000 (f: 0.000000, d: 0.000000e+00)

Originally posted by @Solido in https://github.com/JetBrains/skija/issues/53#issuecomment-755774385

Hi !

Thanks for Color4f, code is now much more direct.

Instead of opening a ticket each time I'd like to suggest a list of methods & maybe influence you in your implementation priorities...

Thanks !

• [ ] path.rewind()

• [ ] path.drawPatch()

• [ ] path.drawPoints with Points

• [x] Canvas drawTextOnPath

• [x] Gradient with SkPoint instead of float (help a lot with sugar syntax / conversions)

• [x] Canvas.saveLayer with Rect

Also I've never linked Java to C but maybe later I'll be able to connect some API calls.

Hi Skija Team,

Thanks for the work on this lib, can't wait to see how it will integrate with yours IDE solutions.

Here are 2 questions that need some help please :

• Is is possible to render image without any graphic context directly calling cpu | gpu ?

• How compatible is it with Graal VM ?

Thank you !

Robert

I was wondering how I can access the raw pixel byte array of an Image in Skija. After loading an Image via Image.makeFromEncoded I somehow could not find a good way to convert the Image to a Bitmap. And even if I would be able to create a Bitmap there seems no accessor for the raw byte[] of the image representing the pixels. I need to do some raw pixel manipulation (for diffing purposes).

On SkiaSharp you can create a SKBitmap either by using SKBitmap.Decode() or via SKBitmap.FromImage. The raw pixels are then accessible via skBitmap.Bytes.

Is this missing in Skija?

Hi !

My stuffs are getting more complex using Skija and I'd like to refactor to Kotlin objects drawn as SK Drawable. Do you have an estimation for landing this feature in your roadmap ?

Thanks !

I tried to add some basic bindings for RuntimeEffect but I think I need some advice on how to proceed.

1. How should I handle the Result struct in RuntimeEffect.h? Should I also be returning one in Java?
2. That MakeShader binding is a mess, I have no idea how to deal with childrenPtrs and uniformPtr.
3. Are there any more RuntimeEffect functions that need bindings?

I'd appreciate any feedback, C++ isn't my strong suit.

Reference material:

• https://skia.org/docs/user/sksl/
• https://github.com/mono/SkiaSharp/pull/1221/files#diff-9b53ac31984a05ad45ba4e2d111d9dc89289422983199bc68a2512ee750da04cR2896
• https://skia.googlesource.com/skia/+/refs/heads/main/modules/canvaskit/canvaskit_bindings.cpp#1727

Closes #120.

Not sure where this problem lies, but I've been experiencing a core dump crash somewhere in libfreetype when JavaFx is initialized before rendering text using canvas drawString.

Ubuntu 18.04
openjdk version "12.0.1" 2019-04-16
OpenJDK Runtime Environment Zulu12.2+3-CA (build 12.0.1+12)
OpenJDK 64-Bit Server VM Zulu12.2+3-CA (build 12.0.1+12, mixed mode, sharing)

I am trying to use skija's text rendering functionality. However, when JavaFx is initialized before trying to render with skija, the whole repl crashes with a core dump somewhere in libfreetype.

When I do the skija text rendering first, and then initialize JavaFx, things seem to work.

I have added a demo project here: https://github.com/mjmeintjes/skija-cljfx-crash-demo

If I execute (Platform/startup #(Platform/setImplicitExit false)) before (create-image-with-text), then the JVM crashes due to a crash in native code, somewhere in libfreetype.

However, if I execute (create-image-with-text) first, then I can run the startup code and then (create-image-with-text) can successfully run.

FramebufferSize 1440x810, scale 1.0, window 1440x810

A fatal error has been detected by the Java Runtime Environment:

EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x00007ffba78129e0, pid=7984, tid=9208

JRE version: OpenJDK Runtime Environment (15.0+31) (build 15-ea+31-1502)

Java VM: OpenJDK 64-Bit Server VM (15-ea+31-1502, mixed mode, sharing, tiered, compressed oops, g1 gc, windows-amd64)

Problematic frame:

C [skija.dll+0xb29e0]

No core dump will be written. Minidumps are not enabled by default on client versions of Windows

An error report file with more information is saved as:

C:\Users\ABC.ABC-PC\IdeaProjects\SkijaProject\hs_err_pid7984.log

If you would like to submit a bug report, please visit:

https://bugreport.java.com/bugreport/crash.jsp

The crash happened outside the Java Virtual Machine in native code.

See problematic frame for where to report the bug.

hs_err_pid7984.log

Hi:

I run in vps server windows server 2012

Exception in thread "main" java.lang.UnsatisfiedLinkError: C:\Users\Administrato r\AppData\Local\Temp\skija_0.93.6\skija.dll: Can't find dependent libraries at java.base/java.lang.ClassLoader$NativeLibrary.load(Native Method) at java.base/java.lang.ClassLoader.loadLibrary0(ClassLoader.java:2614) at java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:2499) at java.base/java.lang.Runtime.load0(Runtime.java:812) at java.base/java.lang.System.load(System.java:1821) at org.jetbrains.skija.impl.Library.load(Library.java:73) at org.jetbrains.skija.impl.Library.staticLoad(Library.java:47) at org.jetbrains.skija.Surface.(Surface.java:9) at com.javasrc.map.map.t3(map.java:166) at http_main.main(http_main.java:33)

public static void t3() { //org.jetbrains.skija.windows.LibraryFinder; //https://github.com/JetBrains/skija/blob/master/docs/Getting%20Started.md Surface surface = Surface.makeRasterN32Premul(100, 100); Canvas canvas = surface.getCanvas();

    Paint paint = new Paint();
    paint.setColor(0xFFFF0000);


    canvas.drawCircle(50, 50, 30, paint);

    //--------------------------------------------------------
    Image image = surface.makeImageSnapshot();
    Data pngData = image.encodeToData(EncodedImageFormat.PNG);

    //-- 0.89.8
    byte [] buf = pngData.getBytes();
    ByteBuffer pngBytes = ByteBuffer.wrap(buf);
    //--


    

    try
    {
        File file = new File("d:\\filename.png");

        boolean append = false;

        FileOutputStream fs = new FileOutputStream(file, append);

        FileChannel wChannel = fs.getChannel();

        //wChannel.write(bbuf);
        wChannel.write(pngBytes);

        wChannel.close();
        fs.close();


    }
    catch (Exception e)//(IOException e) 
    {
        System.out.println(e);
    }

}//

Do need to install any libraries? Please help me.

Jetpack Compose is mentioned as the first item on "Built with Skija", however according to Jetbrains Compose for Desktop uses Skiko:

Compose for Desktop is powered by our graphics library Skiko. By default, it uses an OpenGL-based renderer on macOS and Linux, and (now) a DirectX-based renderer on Windows.

Source: https://blog.jetbrains.com/kotlin/2021/02/jetpack-compose-for-desktop-milestone-3-released/

I can believe that there was a time where a Skija backend was used then moved to Skiko before launch. If this informantion is not accurate, i hope someone with more expertise to clarify, thanks.

I want to draw image with text together, but I don't find any method to use rich-text in skaji. If I draw image and text separately, I may have typographical problems. So I want to know if any ways to use rich-text in skaji?

I need the missing methods for my project. So I have begun the work to implement them

I have completed most of the conversion work. I'm at the writing-unit-test stage.

But I have a few implementation questions first:

1. I assume Matrix33 is intended to be the Skija version of SkMatrix. Correct? If so, I am curious. Why the name change?
2. Is Matrix33 intended to be mutable or immutable?
3. If mutable, I will need to remove Matrix33.IDENTITY, since something like Matrix.33.IDENTITY.setScale() will cause havoc.
4. makePreScale() confuses me. It has the make prefix but it is not a static constructor. Was it intended that all the preScale()/, postScale() type fluent methods all be renamed to makePreScale()/makePostScale() style naming? Or is it just a mistake?

Calling a native method _nMakeFromFile from Typeface class causes an Access Violation. (Typeface.java 142). It's happening regardless of file and path. The issue arises when trying to create a Scene from Examples. Scene requires initialization of static final Typeface iter (Scene.java 7).

Log file: hs_err_pid512.log