Minor tweaks to native code.

skiko/build.gradle.kts

@@ -77,6 +77,10 @@ kotlin {
     }
 }
 
+tasks.withType(JavaCompile::class.java).configureEach {
+    this.getOptions().compilerArgs.addAll(listOf("-source", "11", "-target", "11"))
+}
+
 // See https://docs.gradle.org/current/userguide/cpp_library_plugin.html.
 tasks.withType(CppCompile::class.java).configureEach {
     // Prefer 'java.home' system property to simplify overriding from Intellij.
@@ -172,7 +176,6 @@ project.tasks.register<Exec>("objcCompile") {
     outputs.files("$outDir/$objcSrc.o")
 }
 
-
 tasks.withType(LinkSharedLibrary::class.java).configureEach {
     when (target) {
         "macos" -> {
@@ -254,8 +257,6 @@ project.tasks.register<JavaExec>("run") {
     classpath = files(skikoJvmRuntimeJar.map { it.archiveFile })
 }
 
-
-
 // disable unexpected native publications (default C++ publications are failing)
 tasks.withType<AbstractPublishToMaven>().configureEach {
     doFirst {

skiko/src/jvmMain/cpp/common/jawt.cc

@@ -10,15 +10,43 @@
 
 typedef jboolean (*JAWT_GetAWT_t)(JNIEnv *, JAWT *);
 
+#if 0
+bool check(JNIEnv* env, const char* msg) {
+    if (env->ExceptionCheck()) {
+        jthrowable exception = env->ExceptionOccurred();
+        jclass throwableClass = env->FindClass("java/lang/Throwable");
+        jmethodID toStringMethod = env->GetMethodID(
+                throwableClass, "toString", "()Ljava/lang/String;");
+        jstring messageObject = (jstring) env->CallObjectMethod(exception, toStringMethod);
+        const char* messageString = env->GetStringUTFChars(messageObject, 0);
+        fprintf(stderr, "Java exception: %s\n", messageString);
+        env->ReleaseStringUTFChars(messageObject, messageString);
+        jmethodID printStackTraceMethod = env->GetMethodID(throwableClass, "printStackTrace", "()V");
+        env->CallVoidMethod(exception, printStackTraceMethod);
+        env->ExceptionClear();
+    }
+}
+#endif
+
+void findJdkHome(JNIEnv* env, char* path, int pathLength) {
+    jclass systemClass = env->FindClass("java/lang/System");
+    jmethodID getPropertyMethod = env->GetStaticMethodID(
+        systemClass,
+        "getProperty",
+        "(Ljava/lang/String;)Ljava/lang/String;");
+    jstring javaHomeString = env->NewStringUTF("java.home");
+    jstring propertyString = (jstring) env->CallStaticObjectMethod(systemClass, getPropertyMethod, javaHomeString);
+    const char* propertyChars = env->GetStringUTFChars(propertyString, 0);
+    snprintf(path, pathLength, "%s", propertyChars);
+    env->ReleaseStringUTFChars(propertyString, propertyChars);
+}
+
 extern "C" jboolean Skiko_GetAWT(JNIEnv *env, JAWT *awt) {
   static JAWT_GetAWT_t func = nullptr;
-  if (!func) {
-    char *jdkHome = getenv("JAVA_HOME");
-    if (!jdkHome) {
-      fprintf(stderr, "No JAVA_HOME defined!");
-      abort();
-    }
 #if SK_BUILD_FOR_WIN
+  if (!func) {
+    char jdkHome[FILENAME_MAX];
+    findJdkHome(env, jdkHome, sizeof(jdkHome));
     char path[FILENAME_MAX];
     snprintf(path, sizeof(path), "%s\\bin\\jawt.dll", jdkHome);
     HMODULE lib = LoadLibrary(path);
@@ -32,6 +60,9 @@ extern "C" jboolean Skiko_GetAWT(JNIEnv *env, JAWT *awt) {
       abort();
     }
 #else
+    if (!func) {
+        char jdkHome[FILENAME_MAX];
+        findJdkHome(env, jdkHome, sizeof(jdkHome));
         char path[FILENAME_MAX];
         snprintf(path, sizeof(path), "%s/lib/libjawt%s", jdkHome,
 #if SK_BUILD_FOR_MAC
@@ -50,7 +81,7 @@ extern "C" jboolean Skiko_GetAWT(JNIEnv *env, JAWT *awt) {
             fprintf(stderr, "Cannot find JAWT_GetAWT in %s\n", path);
             abort();
         }
-#endif
   }
+#endif
   return func(env, awt);
 }
\ No newline at end of file

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

@@ -117,6 +117,6 @@ open class SkiaWindow : JFrame() {
     }
 
     fun display() {
-        layer.display()
+        layer.redrawLayer()
     }
 }

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

@@ -163,7 +163,7 @@ JNIEXPORT void JNICALL Java_org_jetbrains_skiko_HardwareLayer_updateLayer(JNIEnv
     jint lock = 0;
     NSObject<JAWT_SurfaceLayers>* dsi_mac = NULL;
 
-    awt.version = JAWT_VERSION_9;
+    awt.version = JAWT_VERSION_9 /* | JAWT_MACOSX_USE_CALAYER */;
     result = Skiko_GetAWT(env, &awt);
     assert(result != JNI_FALSE);