ui/gl/android/scoped_java_surface.cc

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/gl/android/scoped_java_surface.h"
   6
   7 #include "base/logging.h"
   8 #include "jni/Surface_jni.h"
   9 #include "ui/gl/android/surface_texture.h"
  10
  11 namespace {
  12
  13 bool g_jni_initialized = false;
  14
  15 void RegisterNativesIfNeeded(JNIEnv* env) {
  16   if (!g_jni_initialized) {
  17     JNI_Surface::RegisterNativesImpl(env);
  18     g_jni_initialized = true;
  19   }
  20 }
  21
  22 }  // anonymous namespace
  23
  24 namespace gfx {
  25
  26 ScopedJavaSurface::ScopedJavaSurface() {
  27 }
  28
  29 ScopedJavaSurface::ScopedJavaSurface(
  30     const base::android::JavaRef<jobject>& surface)
  31     : auto_release_(true),
  32       is_protected_(false) {
  33   JNIEnv* env = base::android::AttachCurrentThread();
  34   RegisterNativesIfNeeded(env);
  35   DCHECK(env->IsInstanceOf(surface.obj(), Surface_clazz(env)));
  36   j_surface_.Reset(surface);
  37 }
  38
  39 ScopedJavaSurface::ScopedJavaSurface(
  40     const SurfaceTexture* surface_texture)
  41     : auto_release_(true),
  42       is_protected_(false) {
  43   JNIEnv* env = base::android::AttachCurrentThread();
  44   RegisterNativesIfNeeded(env);
  45   ScopedJavaLocalRef<jobject> tmp(JNI_Surface::Java_Surface_Constructor(
  46       env, surface_texture->j_surface_texture().obj()));
  47   DCHECK(!tmp.is_null());
  48   j_surface_.Reset(tmp);
  49 }
  50
  51 ScopedJavaSurface::ScopedJavaSurface(RValue rvalue) {
  52   MoveFrom(*rvalue.object);
  53 }
  54
  55 ScopedJavaSurface& ScopedJavaSurface::operator=(RValue rhs) {
  56   MoveFrom(*rhs.object);
  57   return *this;
  58 }
  59
  60 ScopedJavaSurface::~ScopedJavaSurface() {
  61   if (auto_release_ && !j_surface_.is_null()) {
  62     JNIEnv* env = base::android::AttachCurrentThread();
  63     JNI_Surface::Java_Surface_release(env, j_surface_.obj());
  64   }
  65 }
  66
  67 void ScopedJavaSurface::MoveFrom(ScopedJavaSurface& other) {
  68   JNIEnv* env = base::android::AttachCurrentThread();
  69   j_surface_.Reset(env, other.j_surface_.Release());
  70   auto_release_ = other.auto_release_;
  71   is_protected_ = other.is_protected_;
  72 }
  73
  74 bool ScopedJavaSurface::IsEmpty() const {
  75   return j_surface_.is_null();
  76 }
  77
  78 // static
  79 ScopedJavaSurface ScopedJavaSurface::AcquireExternalSurface(jobject surface) {
  80   JNIEnv* env = base::android::AttachCurrentThread();
  81   ScopedJavaLocalRef<jobject> surface_ref;
  82   surface_ref.Reset(env, surface);
  83   gfx::ScopedJavaSurface scoped_surface(surface_ref);
  84   scoped_surface.auto_release_ = false;
  85   scoped_surface.is_protected_ = true;
  86   return scoped_surface;
  87 }
  88
  89 }  // namespace gfx