SkyShell should be able to draw a green square with GL

sky/shell/sky_view.cc

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "sky/shell/sky_view.h"
+
+#include <android/input.h>
+#include <android/native_window_jni.h>
+
+#include "base/android/jni_android.h"
+#include "jni/SkyView_jni.h"
+
+namespace sky {
+namespace shell {
+
+// static
+bool SkyView::Register(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+SkyView::Delegate::~Delegate() {
+}
+
+SkyView::SkyView(Delegate* delegate) : delegate_(delegate), window_(NULL) {
+}
+
+SkyView::~SkyView() {
+  if (window_)
+    ReleaseWindow();
+}
+
+void SkyView::Init() {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  Java_SkyView_createForActivity(env, base::android::GetApplicationContext(),
+                                 reinterpret_cast<jlong>(this));
+}
+
+void SkyView::Destroy(JNIEnv* env, jobject obj) {
+  delegate_->OnDestroyed();
+}
+
+void SkyView::SurfaceCreated(JNIEnv* env, jobject obj, jobject jsurface) {
+  base::android::ScopedJavaLocalRef<jobject> protector(env, jsurface);
+  // Note: This ensures that any local references used by
+  // ANativeWindow_fromSurface are released immediately. This is needed as a
+  // workaround for https://code.google.com/p/android/issues/detail?id=68174
+  {
+    base::android::ScopedJavaLocalFrame scoped_local_reference_frame(env);
+    window_ = ANativeWindow_fromSurface(env, jsurface);
+  }
+  delegate_->OnAcceleratedWidgetAvailable(window_);
+}
+
+void SkyView::SurfaceDestroyed(JNIEnv* env, jobject obj) {
+  DCHECK(window_);
+  ReleaseWindow();
+}
+
+void SkyView::SurfaceSetSize(JNIEnv* env,
+                             jobject obj,
+                             jint width,
+                             jint height,
+                             jfloat density) {
+}
+
+void SkyView::ReleaseWindow() {
+  ANativeWindow_release(window_);
+  window_ = NULL;
+}
+
+}  // namespace shell
+}  // namespace sky