ContentShell rendering support on Android.

content/shell/android/shell_manager.cc

 // Copyright (c) 2012 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 "content/shell/android/shell_manager.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/android/scoped_java_ref.h"
+#include "base/bind.h"
 #include "base/lazy_instance.h"
 #include "content/shell/shell.h"
 #include "content/shell/shell_browser_context.h"
 #include "content/shell/shell_content_browser_client.h"
+#include "content/public/browser/android/draw_delegate.h"
+#include "content/public/browser/render_widget_host_view.h"
+#include "content/public/browser/web_contents.h"
+#include "content/shell/android/draw_context.h"
+#include "content/shell/shell.h"
 #include "googleurl/src/gurl.h"
 #include "jni/ShellManager_jni.h"
+#include "ui/gfx/size.h"
+
+#include <android/native_window_jni.h>
 
 using base::android::ScopedJavaLocalRef;
+using content::DrawContext;
+using content::DrawDelegate;
 
-base::LazyInstance<base::android::ScopedJavaGlobalRef<jobject> >
-    g_content_shell_manager = LAZY_INSTANCE_INITIALIZER;
+namespace {
+
+struct GlobalState {
+  GlobalState()
+      : context(NULL) {
+  }
+  base::android::ScopedJavaGlobalRef<jobject> j_obj;
+  DrawContext* context;
+};
+
+base::LazyInstance<GlobalState> g_global_state = LAZY_INSTANCE_INITIALIZER;
+
+static void SurfaceUpdated(
+    uint64 texture,
+    content::RenderWidgetHostView* view,
+    const DrawDelegate::SurfacePresentedCallback& callback) {
+  uint32 sync_point = g_global_state.Get().context->Draw(texture);
+  callback.Run(sync_point);
+}
+
+} // anonymous namespace
 
 namespace content {
 
 jobject CreateShellView() {
   JNIEnv* env = base::android::AttachCurrentThread();
   return Java_ShellManager_createShell(
-      env, g_content_shell_manager.Get().obj()).Release();
+      env, g_global_state.Get().j_obj.obj()).Release();
 }
 
 // Register native methods
 bool RegisterShellManager(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 static void Init(JNIEnv* env, jclass clazz, jobject obj) {
-  g_content_shell_manager.Get().Reset(
+  g_global_state.Get().j_obj.Reset(
       base::android::ScopedJavaLocalRef<jobject>(env, obj));
+  DrawDelegate::SurfaceUpdatedCallback cb = base::Bind(
+      &SurfaceUpdated);
+  DrawDelegate::GetInstance()->SetUpdateCallback(cb);
+}
+
+static void SurfaceCreated(
+    JNIEnv* env, jclass clazz, jobject jsurface) {
+  ANativeWindow* native_window = ANativeWindow_fromSurface(env, jsurface);
+  if (native_window) {
+    if (g_global_state.Get().context)
+      delete g_global_state.Get().context;
+
+    g_global_state.Get().context = new DrawContext(native_window);
+    ANativeWindow_release(native_window);
+  }
+}
+
+static void SurfaceDestroyed(JNIEnv* env, jclass clazz) {
+  if (g_global_state.Get().context)
+    delete g_global_state.Get().context;
+}
+
+static void SurfaceSetSize(
+    JNIEnv* env, jclass clazz, jint width, jint height) {
+  gfx::Size size = gfx::Size(width, height);
+  DrawDelegate::GetInstance()->SetBounds(size);
+  DCHECK(g_global_state.Get().context);
+  g_global_state.Get().context->Reshape(width, height);
 }
 
 void LaunchShell(JNIEnv* env, jclass clazz, jstring jurl) {
   ShellBrowserContext* browserContext =
       static_cast<ShellContentBrowserClient*>(
           GetContentClient()->browser())->browser_context();
   GURL url(base::android::ConvertJavaStringToUTF8(env, jurl));
   Shell::CreateNewWindow(browserContext,
                          url,
                          NULL,
                          MSG_ROUTING_NONE,
                          NULL);
 }
 
 }  // namespace content