Added function getWindowHandle() for JCEF support.

skiko/src/jvmMain/cpp/linux/drawlayer.cc

@@ -195,4 +195,42 @@ extern "C"
     {
         return 1.0f;
     }
+
+    JNIEXPORT jlong JNICALL Java_org_jetbrains_skiko_HardwareLayer_getWindowHandle(JNIEnv *env, jobject canvas)
+    {
+        JAWT awt;
+        JAWT_DrawingSurface *ds = NULL;
+        JAWT_DrawingSurfaceInfo *dsi = NULL;
+
+        jboolean result = JNI_FALSE;
+        jint lock = 0;
+        JAWT_X11DrawingSurfaceInfo *dsi_x11;
+
+        awt.version = (jint)JAWT_VERSION_9;
+        result = Skiko_GetAWT(env, &awt);
+
+        if (result == JNI_FALSE)
+        {
+            fprintf(stderr, "JAWT_GetAWT failed! Result is JNI_FALSE\n");
+            return;
+        }
+
+        if (jvm == NULL)
+        {
+            env->GetJavaVM(&jvm);
+        }
+
+        ds = awt.GetDrawingSurface(env, canvas);
+        lock = ds->Lock(ds);
+        dsi = ds->GetDrawingSurfaceInfo(ds);
+        dsi_x11 = (JAWT_X11DrawingSurfaceInfo *)dsi->platformInfo;
+
+        Window window = dsi_x11->drawable;
+
+        ds->FreeDrawingSurfaceInfo(dsi);
+        ds->Unlock(ds);
+        awt.FreeDrawingSurface(ds);
+
+        return (jlong)window;
+    }
 } // extern "C"
\ No newline at end of file

skiko/src/jvmMain/cpp/windows/drawlayer.cc

@@ -194,4 +194,44 @@ extern "C"
         }
         return 1.0f;
     }
+
+    JNIEXPORT jlong JNICALL Java_org_jetbrains_skiko_HardwareLayer_getWindowHandle(JNIEnv *env, jobject window)
+    {
+        JAWT awt;
+        JAWT_DrawingSurface *ds = NULL;
+        JAWT_DrawingSurfaceInfo *dsi = NULL;
+        PIXELFORMATDESCRIPTOR pixFormatDscr;
+        HGLRC context = NULL;
+
+        jboolean result = JNI_FALSE;
+        jint lock = 0;
+        JAWT_Win32DrawingSurfaceInfo *dsi_win;
+
+        awt.version = (jint)JAWT_VERSION_9;
+        result = Skiko_GetAWT(env, &awt);
+
+        if (result == JNI_FALSE)
+        {
+            fprintf(stderr, "JAWT_GetAWT failed! Result is JNI_FALSE\n");
+            return -1;
+        }
+
+        if (jvm == NULL)
+        {
+            env->GetJavaVM(&jvm);
+        }
+
+        ds = awt.GetDrawingSurface(env, window);
+        lock = ds->Lock(ds);
+        dsi = ds->GetDrawingSurfaceInfo(ds);
+        dsi_win = (JAWT_Win32DrawingSurfaceInfo *)dsi->platformInfo;
+
+        HWND hwnd = dsi_win->hwnd;
+
+        ds->FreeDrawingSurfaceInfo(dsi);
+        ds->Unlock(ds);
+        awt.FreeDrawingSurface(ds);
+
+        return (jlong)hwnd;
+    }
 } // extern "C"
\ No newline at end of file

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

@@ -4,5 +4,6 @@ interface Drawable {
     fun redrawLayer()
     fun updateLayer()
     fun disposeLayer()
+    val windowHandle: Int
     val contentScale: Float
 }
\ No newline at end of file

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

@@ -15,6 +15,8 @@ open class HardwareLayer : Canvas(), Drawable {
     external override fun redrawLayer()
     external override fun updateLayer()
     external override fun disposeLayer()
+    override val windowHandle: Int
+        external get
     override val contentScale: Float
         external get
 }
\ No newline at end of file

skiko/src/jvmMain/objectiveC/macos/drawlayer.m

@@ -3,6 +3,8 @@
 
 #define GL_SILENCE_DEPRECATION
 
+#define kNullWindowHandle NULL
+
 #import <Cocoa/Cocoa.h>
 #import <QuartzCore/QuartzCore.h>
 #import <OpenGL/gl3.h>
@@ -228,3 +230,7 @@ JNIEXPORT jfloat JNICALL Java_org_jetbrains_skiko_HardwareLayer_getContentScale(
     }
     return 1.0f;
 }
+
+JNIEXPORT jlong JNICALL Java_org_jetbrains_skiko_HardwareLayer_getWindowHandle(JNIEnv *env, jobject window) {
+    return (jlong)kNullWindowHandle;
+}