Add more ptr checks in AWT.kt (#810)

* Add more checks

* Update skiko/src/awtMain/kotlin/org/jetbrains/skiko/redrawer/WindowsOpenGLRedrawer.kt

* Update skiko/src/awtMain/kotlin/org/jetbrains/skiko/AWT.kt
Co-authored-by: Igor Demin <igordmn@users.noreply.github.com>

* Update skiko/src/awtMain/kotlin/org/jetbrains/skiko/redrawer/WindowsOpenGLRedrawer.kt
Co-authored-by: Igor Demin <igordmn@users.noreply.github.com>

---------
Co-authored-by: Igor Demin <igordmn@users.noreply.github.com>

skiko/src/awtMain/kotlin/org/jetbrains/skiko/AWT.kt

@@ -45,7 +45,10 @@ internal class DrawingSurface(
         }
     }
 
-    fun getInfo() = DrawingSurfaceInfo(ptr)
+    fun getInfo(): DrawingSurfaceInfo {
+        check(ptr != 0L) { "DrawingSurface.ptr is 0L. DrawingSurface might've been closed." }
+        return DrawingSurfaceInfo(ptr)
+    }
 
     override fun close() {
         freeDrawingSurface(awt, ptr)
@@ -62,7 +65,13 @@ internal class DrawingSurfaceInfo(
         }
         private set
 
-    val platformInfo: Long get() = getPlatformInfo(ptr)
+    val platformInfo: Long
+        get() {
+            check(ptr != 0L) { "DrawingSurfaceInfo.ptr is 0L. DrawingSurfaceInfo might've been closed." }
+            return getPlatformInfo(ptr).also {
+                check(it != 0L) { "Can't get platformInfo" }
+            }
+        }
 
     override fun close() {
         freeDrawingSurfaceInfo(drawingSurface, ptr)

skiko/src/awtMain/kotlin/org/jetbrains/skiko/redrawer/WindowsOpenGLRedrawer.kt

@@ -13,7 +13,12 @@ internal class WindowsOpenGLRedrawer(
     private val contextHandler = OpenGLContextHandler(layer)
     override val renderInfo: String get() = contextHandler.rendererInfo()
 
-    private val device = layer.backedLayer.useDrawingSurfacePlatformInfo(::getDevice)
+    private val device: Long = layer.backedLayer.useDrawingSurfacePlatformInfo {
+        getDevice(it).also { devicePtr ->
+            check(devicePtr != 0L) { "Can't get device" }
+        }
+    }
+
     private val context = createContext(device, layer.contentHandle, layer.transparency).also {
         if (it == 0L) {
             throw RenderException("Cannot create Windows GL context")