Fixed case where SkiaLayer size could be 0x0 and surface was not created. (#408)

* Fixed case where SkiaLayer size could be 0x0 and surface was not created.

skiko/src/jvmMain/kotlin/org/jetbrains/skiko/context/Direct3DContextHandler.kt

@@ -10,6 +10,7 @@ import java.lang.ref.Reference
 internal class Direct3DContextHandler(layer: SkiaLayer) : JvmContextHandler(layer) {
     private val bufferCount = 2
     private var surfaces: Array<Surface?> = arrayOfNulls(bufferCount)
+    private fun isSurfacesNull() = surfaces.all { it == null }
 
     private val directXRedrawer: Direct3DRedrawer
         get() = layer.redrawer!! as Direct3DRedrawer
@@ -46,7 +47,7 @@ internal class Direct3DContextHandler(layer: SkiaLayer) : JvmContextHandler(laye
         val w = (layer.width * scale).toInt().coerceAtLeast(0)
         val h = (layer.height * scale).toInt().coerceAtLeast(0)
 
-        if (isSizeChanged(w, h)) {
+        if (isSizeChanged(w, h) || isSurfacesNull()) {
             disposeCanvas()
             context?.flush()
             

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

@@ -38,7 +38,7 @@ internal class DirectSoftwareContextHandler(layer: SkiaLayer) : JvmContextHandle
         val scale = layer.contentScale
         val w = (layer.width * scale).toInt().coerceAtLeast(0)
         val h = (layer.height * scale).toInt().coerceAtLeast(0)
-        if (isSizeChanged(w, h)) {
+        if (isSizeChanged(w, h) || surface == null) {
             disposeCanvas()
             softwareRedrawer.resize(w, h)
             surface = softwareRedrawer.acquireSurface()

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

@@ -42,7 +42,7 @@ internal class OpenGLContextHandler(layer: SkiaLayer) : JvmContextHandler(layer)
         val w = (layer.width * scale).toInt().coerceAtLeast(0)
         val h = (layer.height * scale).toInt().coerceAtLeast(0)
 
-        if (isSizeChanged(w, h)) {
+        if (isSizeChanged(w, h) || surface == null) {
             disposeCanvas()
             val gl = OpenGLApi.instance
             val fbId = gl.glGetIntegerv(gl.GL_DRAW_FRAMEBUFFER_BINDING)