Fixed flickering on OpenGL/Software rendering when resizing SkiaLayer.

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

@@ -18,6 +18,7 @@ abstract class HardwareLayer : Canvas() {
         _contentScale = getDpiScale()
     }
 
+    override fun paint(g: Graphics) {}
 
     internal open fun init() {
         useDrawingSurfacePlatformInfo(::nativeInit)

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

@@ -15,7 +15,6 @@ import java.awt.event.MouseMotionListener
 import java.awt.event.MouseWheelListener
 import java.awt.Graphics
 import java.awt.event.HierarchyEvent
-import java.awt.GridLayout
 import javax.swing.JPanel
 import javax.swing.SwingUtilities.invokeLater
 import javax.swing.SwingUtilities.isEventDispatchThread
@@ -34,7 +33,7 @@ open class SkiaLayer(
 
     init {
         setOpaque(false)
-        layout = GridLayout(1, 1)
+        layout = null
         backedLayer = object : HardwareLayer() { }
         add(backedLayer)
         @Suppress("LeakingThis")
@@ -102,6 +101,7 @@ open class SkiaLayer(
 
     override fun setBounds(x: Int, y: Int, width: Int, height: Int) {
         super.setBounds(x, y, width, height)
+        backedLayer.setSize(width, height)
         if (backedLayer.checkContentScale()) {
             contentScaleChanged()
         }

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

@@ -73,7 +73,7 @@ internal class SoftwareContextHandler(layer: SkiaLayer) : ContextHandler(layer)
                 null
             )
             image = BufferedImage(colorModel, raster!!, false, null)
-            layer.getGraphics()?.drawImage(image!!, 0, 0, layer.width, layer.height, null)
+            layer.backedLayer.getGraphics()?.drawImage(image!!, 0, 0, layer.width, layer.height, null)
         }
     }