Fixed rendering issue when launching the application.

skiko/src/jvmMain/kotlin/org/jetbrains/skiko/SkiaLayer.kt

@@ -41,7 +41,6 @@ open class SkiaLayer(
         val initialRenderApi = fallbackRenderApiQueue.removeAt(0)
         contextHandler = createContextHandler(this, initialRenderApi)
         redrawer = platformOperations.createRedrawer(this, initialRenderApi, properties)
-        println("init ${redrawer == null}")
         redrawer?.syncSize()
         redraw()
     }
@@ -58,14 +57,12 @@ open class SkiaLayer(
     }
 
     override fun setBounds(x: Int, y: Int, width: Int, height: Int) {
-        println("setBounds: $x $y $width $height ${redrawer == null}")
         super.setBounds(x, y, width, height)
         redrawer?.syncSize()
         redraw()
     }
 
     override fun paint(g: Graphics) {
-        println("paint ${redrawer == null}")
         super.paint(g)
         redrawer?.syncSize()
         redrawer?.redrawImmediately()

skiko/src/jvmMain/kotlin/org/jetbrains/skiko/context/MetalContextHandler.kt

 package org.jetbrains.skiko.context
 
-import java.lang.ref.Reference
 import org.jetbrains.skija.ColorSpace
-import org.jetbrains.skija.impl.Native
 import org.jetbrains.skija.Surface
 import org.jetbrains.skija.SurfaceColorFormat
 import org.jetbrains.skija.SurfaceOrigin
-import org.jetbrains.skiko.GraphicsApi
 import org.jetbrains.skiko.SkiaLayer
 import org.jetbrains.skiko.redrawer.MetalRedrawer
-import javax.swing.SwingUtilities.convertPoint
-import javax.swing.SwingUtilities.getRootPane
 
 internal class MetalContextHandler(layer: SkiaLayer) : ContextHandler(layer) {
     val metalRedrawer: MetalRedrawer
         get() = layer.redrawer!! as MetalRedrawer
-    var device: Long = 0
 
     override fun initContext(): Boolean {
         try {
             if (context == null) {
-                device = metalRedrawer.createDevice()
-                if (device == 0L) {
-                    throw Exception("Failed to create Metal device.")
-                }
-                context = metalRedrawer.makeContext(device)
+                context = metalRedrawer.makeContext()
             }
         } catch (e: Exception) {
             println("${e.message}\nFailed to create Skia Metal context!")
@@ -40,7 +30,7 @@ internal class MetalContextHandler(layer: SkiaLayer) : ContextHandler(layer) {
         val w = (layer.width * scale).toInt().coerceAtLeast(0)
         val h = (layer.height * scale).toInt().coerceAtLeast(0)
 
-        renderTarget = metalRedrawer.makeRenderTarget(device, w, h)
+        renderTarget = metalRedrawer.makeRenderTarget(w, h)
 
         surface = Surface.makeFromBackendRenderTarget(
             context!!,
@@ -56,6 +46,6 @@ internal class MetalContextHandler(layer: SkiaLayer) : ContextHandler(layer) {
     override fun flush() {
         super.flush()
         surface!!.flushAndSubmit()
-        metalRedrawer.finishFrame(device)
+        metalRedrawer.finishFrame()
     }
 }

skiko/src/jvmMain/kotlin/org/jetbrains/skiko/redrawer/MetalRedrawer.kt

@@ -16,7 +16,7 @@ internal class MetalRedrawer(
     private val properties: SkiaLayerProperties
 ) : Redrawer {
     private var isDisposed = false
-    private var device: Long = 0
+    private val device = layer.useDrawingSurfacePlatformInfo(::createMetalDevice)
 
     private val frameDispatcher = FrameDispatcher(Dispatchers.Swing) {
         update(System.nanoTime())
@@ -49,7 +49,6 @@ internal class MetalRedrawer(
     }
 
     override fun syncSize() {
-        println("syncsize")
         val globalPosition = convertPoint(layer, layer.x, layer.y, getRootPane(layer))
         setContentScale(device, layer.contentScale)
         resizeLayers(device,
@@ -60,24 +59,21 @@ internal class MetalRedrawer(
         )
     }
 
-    fun makeContext(device: Long) = DirectContext(
+    fun makeContext() = DirectContext(
         makeMetalContext(device)
     )
 
-    fun makeRenderTarget(device: Long, width: Int, height: Int) = BackendRenderTarget(
+    fun makeRenderTarget(width: Int, height: Int) = BackendRenderTarget(
         makeMetalRenderTarget(device, width, height)
     )
-
-    fun createDevice(): Long {
-        device = layer.useDrawingSurfacePlatformInfo(::createMetalDevice)
-        return device
-    }
+    
+    fun finishFrame() = finishFrame(device)
 
     private external fun createMetalDevice(platformInfo: Long): Long
     private external fun makeMetalContext(device: Long): Long
     private external fun makeMetalRenderTarget(device: Long, width: Int, height: Int): Long
     private external fun disposeDevice(device: Long)
-    external fun finishFrame(device: Long)
-    external fun resizeLayers(device: Long, x: Int, y: Int, width: Int, height: Int)
-    external fun setContentScale(device: Long, contentScale: Float)
+    private external fun finishFrame(device: Long)
+    private external fun resizeLayers(device: Long, x: Int, y: Int, width: Int, height: Int)
+    private external fun setContentScale(device: Long, contentScale: Float)
 }

skiko/src/jvmMain/objectiveC/macos/MetalRedrawer.mm

@@ -13,8 +13,6 @@
 #import <mtl/GrMtlBackendContext.h>
 #import <mtl/GrMtlTypes.h>
 
-JavaVM *jvmMetal = NULL;
-
 @interface AWTMetalLayer : CAMetalLayer
 
 @property jobject javaRef;
@@ -102,7 +100,6 @@ JNIEXPORT jlong JNICALL Java_org_jetbrains_skiko_redrawer_MetalRedrawer_createMe
     JNIEnv *env, jobject redrawer, jlong platformInfoPtr)
 {
     MetalDevice *device = [MetalDevice new];
-    env->GetJavaVM(&jvmMetal);
 
     NSObject<JAWT_SurfaceLayers>* dsi_mac = (__bridge NSObject<JAWT_SurfaceLayers> *) platformInfoPtr;
 
@@ -143,15 +140,18 @@ JNIEXPORT void JNICALL Java_org_jetbrains_skiko_redrawer_MetalRedrawer_resizeLay
     [CATransaction setValue:(id)kCFBooleanTrue forKey:kCATransactionDisableActions];
     device.layer.frame = CGRectMake(x, y, width, height);
     [CATransaction commit];
-    [device.layer performSelectorOnMainThread:@selector(setNeedsDisplay) withObject:0 waitUntilDone:NO];
+    [CATransaction flush];
 }
 
 JNIEXPORT void JNICALL Java_org_jetbrains_skiko_redrawer_MetalRedrawer_setContentScale(JNIEnv *env, jobject obj, jlong devicePtr, jfloat contentScale)
 {
     MetalDevice *device = (MetalDevice *) devicePtr;
+    [CATransaction begin];
+    [CATransaction setValue:(id)kCFBooleanTrue forKey:kCATransactionDisableActions];
     assert(contentScale != 0);
     device.layer.contentsScale = contentScale;
-    device.container.contentsScale = contentScale;
+    [CATransaction commit];
+    [CATransaction flush];
 }
 
 JNIEXPORT void JNICALL Java_org_jetbrains_skiko_redrawer_MetalRedrawer_finishFrame(