WIP - Control the lifetime of RenderThreadManager from Java.

android_webview/native/aw_gl_functor.cc

Index: android_webview/native/aw_gl_functor.cc
diff --git a/android_webview/native/aw_gl_functor.cc b/android_webview/native/aw_gl_functor.cc
new file mode 100644
index 0000000000000000000000000000000000000000..cd88a7fe0af8bdaf69b81b447924494df0bdc810
--- /dev/null
+++ b/android_webview/native/aw_gl_functor.cc
@@ -0,0 +1,100 @@
+// Copyright 2016 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 "android_webview/native/aw_gl_functor.h"
+
+#include "android_webview/browser/browser_view_renderer.h"
+#include "android_webview/public/browser/draw_gl.h"
+#include "content/public/browser/browser_thread.h"
+#include "jni/AwGLFunctor_jni.h"
+
+using base::android::AttachCurrentThread;
+using content::BrowserThread;
+
+extern "C" {
+static AwDrawGLFunction DrawGLFunction;
+static void DrawGLFunction(long view_context,
+                           AwDrawGLInfo* draw_info,
+                           void* spare) {
+  // |view_context| is the value that was returned from the java
+  // AwContents.onPrepareDrawGL; this cast must match the code there.
+  reinterpret_cast<android_webview::RenderThreadManager*>(view_context)
+      ->DrawGL(draw_info);
+}
+}
+
+namespace android_webview {
+
+AwGLFunctor::AwGLFunctor(const JavaObjectWeakGlobalRef& java_ref)
+    : java_ref_(java_ref),
+      render_thread_manager_(
+          this,
+          BrowserThread::GetMessageLoopProxyForThread(BrowserThread::UI)),
+      browser_view_renderer_(nullptr) {}
+
+AwGLFunctor::~AwGLFunctor() {}
+
+void AwGLFunctor::OnParentDrawConstraintsUpdated() {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  if (browser_view_renderer_)
+    browser_view_renderer_->OnParentDrawConstraintsUpdated();
+}
+
+bool AwGLFunctor::RequestDrawGL(bool wait_for_completion) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
+  if (obj.is_null())
+    return false;
+  return Java_AwGLFunctor_requestDrawGL(env, obj.obj(), wait_for_completion);
+}
+
+void AwGLFunctor::DetachFunctorFromView() {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
+  if (!obj.is_null())
+    Java_AwGLFunctor_detachFunctorFromView(env, obj.obj());
+}
+
+void AwGLFunctor::SetBrowserViewRenderer(
+    BrowserViewRenderer* browser_view_renderer) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  browser_view_renderer_ = browser_view_renderer;
+}
+
+void AwGLFunctor::Destroy(JNIEnv* env,
+                          const base::android::JavaParamRef<jobject>& obj) {
+  java_ref_.reset();
+  delete this;
+}
+
+void AwGLFunctor::DeleteHardwareRenderer(
+    JNIEnv* env,
+    const base::android::JavaParamRef<jobject>& obj) {
+  render_thread_manager_.DeleteHardwareRendererOnUI();
+}
+
+jlong AwGLFunctor::GetAwDrawGLViewContext(
+    JNIEnv* env,
+    const base::android::JavaParamRef<jobject>& obj) {
+  return reinterpret_cast<intptr_t>(&render_thread_manager_);
+}
+
+static jlong GetAwDrawGLFunction(JNIEnv* env, const JavaParamRef<jclass>&) {
+  return reinterpret_cast<intptr_t>(&DrawGLFunction);
+}
+
+static jlong Create(JNIEnv* env,
+                    const JavaParamRef<jclass>&,
+                    const base::android::JavaParamRef<jobject>& obj) {
+  return reinterpret_cast<intptr_t>(
+      new AwGLFunctor(JavaObjectWeakGlobalRef(env, obj)));
+}
+
+bool RegisterAwGLFunctor(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+}  // namespace android_webview