flutter::PlatformViewAndroidJNIImpl Class Reference

Concrete implementation of PlatformViewAndroidJNI that is compiled with the Android toolchain. More...

#include <platform_view_android_jni_impl.h>

Inheritance diagram for flutter::PlatformViewAndroidJNIImpl:

Public Member Functions
	PlatformViewAndroidJNIImpl (const fml::jni::JavaObjectWeakGlobalRef &java_object)
	~PlatformViewAndroidJNIImpl () override
void	FlutterViewHandlePlatformMessage (std::unique_ptr< flutter::PlatformMessage > message, int responseId) override
	Sends a platform message. The message may be empty. More...
void	FlutterViewHandlePlatformMessageResponse (int responseId, std::unique_ptr< fml::Mapping > data) override
	Responds to a platform message. The data may be a nullptr. More...
void	FlutterViewUpdateSemantics (std::vector< uint8_t > buffer, std::vector< std::string > strings, std::vector< std::vector< uint8_t > > string_attribute_args) override
	Sends semantics tree updates. More...
void	FlutterViewUpdateCustomAccessibilityActions (std::vector< uint8_t > actions_buffer, std::vector< std::string > strings) override
	Sends new custom accessibility events. More...
void	FlutterViewOnFirstFrame () override
	Indicates that FlutterView should start painting pixels. More...
void	FlutterViewOnPreEngineRestart () override
	Indicates that a hot restart is about to happen. More...
void	SurfaceTextureAttachToGLContext (JavaLocalRef surface_texture, int textureId) override
	Attach the SurfaceTexture to the OpenGL ES context that is current on the calling thread. More...
bool	SurfaceTextureShouldUpdate (JavaLocalRef surface_texture) override
	Returns true if surface_texture should be updated. More...
void	SurfaceTextureUpdateTexImage (JavaLocalRef surface_texture) override
	Updates the texture image to the most recent frame from the image stream. More...
void	SurfaceTextureGetTransformMatrix (JavaLocalRef surface_texture, SkMatrix &transform) override
	Gets the transform matrix from the SurfaceTexture. Then, it updates the transform matrix, so it fill the canvas and preserve the aspect ratio. More...
void	SurfaceTextureDetachFromGLContext (JavaLocalRef surface_texture) override
	Detaches a SurfaceTexture from the OpenGL ES context. More...
JavaLocalRef	ImageProducerTextureEntryAcquireLatestImage (JavaLocalRef image_texture_entry) override
	Acquire the latest image available. More...
JavaLocalRef	ImageGetHardwareBuffer (JavaLocalRef image) override
	Grab the HardwareBuffer from image. More...
void	ImageClose (JavaLocalRef image) override
	Call close on image. More...
void	HardwareBufferClose (JavaLocalRef hardware_buffer) override
	Call close on hardware_buffer. More...
void	FlutterViewOnDisplayPlatformView (int view_id, int x, int y, int width, int height, int viewWidth, int viewHeight, MutatorsStack mutators_stack) override
	Positions and sizes a platform view if using hybrid composition. More...
void	FlutterViewDisplayOverlaySurface (int surface_id, int x, int y, int width, int height) override
	Positions and sizes an overlay surface in hybrid composition. More...
void	FlutterViewBeginFrame () override
	Initiates a frame if using hybrid composition. More...
void	FlutterViewEndFrame () override
	Indicates that the current frame ended. It's used to clean up state. More...
std::unique_ptr< PlatformViewAndroidJNI::OverlayMetadata >	FlutterViewCreateOverlaySurface () override
	Instantiates an overlay surface in hybrid composition and provides the necessary metadata to operate the surface in C. More...
void	FlutterViewDestroyOverlaySurfaces () override
	Destroys the overlay surfaces. More...
std::unique_ptr< std::vector< std::string > >	FlutterViewComputePlatformResolvedLocale (std::vector< std::string > supported_locales_data) override
	Computes the locale Android would select. More...
double	GetDisplayRefreshRate () override
double	GetDisplayWidth () override
double	GetDisplayHeight () override
double	GetDisplayDensity () override
bool	RequestDartDeferredLibrary (int loading_unit_id) override
double	FlutterViewGetScaledFontSize (double unscaled_font_size, int configuration_id) const override
Public Member Functions inherited from flutter::PlatformViewAndroidJNI
virtual	~PlatformViewAndroidJNI ()
virtual void	FlutterViewHandlePlatformMessage (std::unique_ptr< flutter::PlatformMessage > message, int responseId)=0
	Sends a platform message. The message may be empty. More...
virtual void	FlutterViewHandlePlatformMessageResponse (int responseId, std::unique_ptr< fml::Mapping > data)=0
	Responds to a platform message. The data may be a nullptr. More...
virtual void	FlutterViewUpdateSemantics (std::vector< uint8_t > buffer, std::vector< std::string > strings, std::vector< std::vector< uint8_t > > string_attribute_args)=0
	Sends semantics tree updates. More...
virtual void	FlutterViewUpdateCustomAccessibilityActions (std::vector< uint8_t > actions_buffer, std::vector< std::string > strings)=0
	Sends new custom accessibility events. More...
virtual void	FlutterViewOnFirstFrame ()=0
	Indicates that FlutterView should start painting pixels. More...
virtual void	FlutterViewOnPreEngineRestart ()=0
	Indicates that a hot restart is about to happen. More...
virtual void	SurfaceTextureAttachToGLContext (JavaLocalRef surface_texture, int textureId)=0
	Attach the SurfaceTexture to the OpenGL ES context that is current on the calling thread. More...
virtual bool	SurfaceTextureShouldUpdate (JavaLocalRef surface_texture)=0
	Returns true if surface_texture should be updated. More...
virtual void	SurfaceTextureUpdateTexImage (JavaLocalRef surface_texture)=0
	Updates the texture image to the most recent frame from the image stream. More...
virtual void	SurfaceTextureGetTransformMatrix (JavaLocalRef surface_texture, SkMatrix &transform)=0
	Gets the transform matrix from the SurfaceTexture. Then, it updates the transform matrix, so it fill the canvas and preserve the aspect ratio. More...
virtual void	SurfaceTextureDetachFromGLContext (JavaLocalRef surface_texture)=0
	Detaches a SurfaceTexture from the OpenGL ES context. More...
virtual JavaLocalRef	ImageProducerTextureEntryAcquireLatestImage (JavaLocalRef image_texture_entry)=0
	Acquire the latest image available. More...
virtual JavaLocalRef	ImageGetHardwareBuffer (JavaLocalRef image)=0
	Grab the HardwareBuffer from image. More...
virtual void	ImageClose (JavaLocalRef image)=0
	Call close on image. More...
virtual void	HardwareBufferClose (JavaLocalRef hardware_buffer)=0
	Call close on hardware_buffer. More...
virtual void	FlutterViewOnDisplayPlatformView (int view_id, int x, int y, int width, int height, int viewWidth, int viewHeight, MutatorsStack mutators_stack)=0
	Positions and sizes a platform view if using hybrid composition. More...
virtual void	FlutterViewDisplayOverlaySurface (int surface_id, int x, int y, int width, int height)=0
	Positions and sizes an overlay surface in hybrid composition. More...
virtual void	FlutterViewBeginFrame ()=0
	Initiates a frame if using hybrid composition. More...
virtual void	FlutterViewEndFrame ()=0
	Indicates that the current frame ended. It's used to clean up state. More...
virtual std::unique_ptr< PlatformViewAndroidJNI::OverlayMetadata >	FlutterViewCreateOverlaySurface ()=0
	Instantiates an overlay surface in hybrid composition and provides the necessary metadata to operate the surface in C. More...
virtual void	FlutterViewDestroyOverlaySurfaces ()=0
	Destroys the overlay surfaces. More...
virtual std::unique_ptr< std::vector< std::string > >	FlutterViewComputePlatformResolvedLocale (std::vector< std::string > supported_locales_data)=0
	Computes the locale Android would select. More...
virtual double	GetDisplayRefreshRate ()=0
virtual double	GetDisplayWidth ()=0
virtual double	GetDisplayHeight ()=0
virtual double	GetDisplayDensity ()=0
virtual bool	RequestDartDeferredLibrary (int loading_unit_id)=0
virtual double	FlutterViewGetScaledFontSize (double unscaled_font_size, int configuration_id) const =0

Detailed Description

Concrete implementation of PlatformViewAndroidJNI that is compiled with the Android toolchain.

Definition at line 17 of file platform_view_android_jni_impl.h.

Constructor & Destructor Documentation

PlatformViewAndroidJNIImpl()

flutter::PlatformViewAndroidJNIImpl::PlatformViewAndroidJNIImpl ( const fml::jni::JavaObjectWeakGlobalRef &  java_object )

explicit

Definition at line 1278 of file platform_view_android_jni_impl.cc.

    : java_object_(java_object) {}

~PlatformViewAndroidJNIImpl()

flutter::PlatformViewAndroidJNIImpl::~PlatformViewAndroidJNIImpl ( )

overridedefault

Member Function Documentation

FlutterViewBeginFrame()

void flutter::PlatformViewAndroidJNIImpl::FlutterViewBeginFrame ( )

overridevirtual

Initiates a frame if using hybrid composition.

Note

Must be called from the platform thread.

Implements flutter::PlatformViewAndroidJNI.

Definition at line 1747 of file platform_view_android_jni_impl.cc.

                                                       {
  JNIEnv* env = fml::jni::AttachCurrentThread();
 
  auto java_object = java_object_.get(env);
  if (java_object.is_null()) {
    return;
  }
 
  env->CallVoidMethod(java_object.obj(), g_on_begin_frame_method);
 
  FML_CHECK(fml::jni::CheckException(env));
}

FlutterViewComputePlatformResolvedLocale()

std::unique_ptr< std::vector< std::string > > flutter::PlatformViewAndroidJNIImpl::FlutterViewComputePlatformResolvedLocale ( std::vector< std::string >  supported_locales_data )

overridevirtual

Computes the locale Android would select.

Implements flutter::PlatformViewAndroidJNI.

Definition at line 1819 of file platform_view_android_jni_impl.cc.

                                                 {
  JNIEnv* env = fml::jni::AttachCurrentThread();
 
  std::unique_ptr<std::vector<std::string>> out =
      std::make_unique<std::vector<std::string>>();
 
  auto java_object = java_object_.get(env);
  if (java_object.is_null()) {
    return out;
  }
  fml::jni::ScopedJavaLocalRef<jobjectArray> j_locales_data =
      fml::jni::VectorToStringArray(env, supported_locales_data);
  jobjectArray result = static_cast<jobjectArray>(env->CallObjectMethod(
      java_object.obj(), g_compute_platform_resolved_locale_method,
      j_locales_data.obj()));
 
  FML_CHECK(fml::jni::CheckException(env));
 
  int length = env->GetArrayLength(result);
  for (int i = 0; i < length; i++) {
    out->emplace_back(fml::jni::JavaStringToString(
        env, static_cast<jstring>(env->GetObjectArrayElement(result, i))));
  }
  return out;
}

FlutterViewCreateOverlaySurface()

std::unique_ptr< PlatformViewAndroidJNI::OverlayMetadata > flutter::PlatformViewAndroidJNIImpl::FlutterViewCreateOverlaySurface ( )

overridevirtual

Instantiates an overlay surface in hybrid composition and provides the necessary metadata to operate the surface in C.

Note

Must be called from the platform thread.

Implements flutter::PlatformViewAndroidJNI.

Definition at line 1774 of file platform_view_android_jni_impl.cc.

                                                            {
  JNIEnv* env = fml::jni::AttachCurrentThread();
 
  auto java_object = java_object_.get(env);
  if (java_object.is_null()) {
    return nullptr;
  }
 
  fml::jni::ScopedJavaLocalRef<jobject> overlay(
      env, env->CallObjectMethod(java_object.obj(),
                                 g_create_overlay_surface_method));
  FML_CHECK(fml::jni::CheckException(env));
 
  if (overlay.is_null()) {
    return std::make_unique<PlatformViewAndroidJNI::OverlayMetadata>(0,
                                                                     nullptr);
  }
 
  jint overlay_id =
      env->CallIntMethod(overlay.obj(), g_overlay_surface_id_method);
 
  jobject overlay_surface =
      env->CallObjectMethod(overlay.obj(), g_overlay_surface_surface_method);
 
  auto overlay_window = fml::MakeRefCounted<AndroidNativeWindow>(
      ANativeWindow_fromSurface(env, overlay_surface));
 
  return std::make_unique<PlatformViewAndroidJNI::OverlayMetadata>(
      overlay_id, std::move(overlay_window));
}

FlutterViewDestroyOverlaySurfaces()

void flutter::PlatformViewAndroidJNIImpl::FlutterViewDestroyOverlaySurfaces ( )

overridevirtual

Destroys the overlay surfaces.

Note

Must be called from the platform thread.

Implements flutter::PlatformViewAndroidJNI.

Definition at line 1805 of file platform_view_android_jni_impl.cc.

                                                                   {
  JNIEnv* env = fml::jni::AttachCurrentThread();
 
  auto java_object = java_object_.get(env);
  if (java_object.is_null()) {
    return;
  }
 
  env->CallVoidMethod(java_object.obj(), g_destroy_overlay_surfaces_method);
 
  FML_CHECK(fml::jni::CheckException(env));
}

FlutterViewDisplayOverlaySurface()

void flutter::PlatformViewAndroidJNIImpl::FlutterViewDisplayOverlaySurface ( int  surface_id, int  x, int  y, int  width, int  height  )

overridevirtual

Positions and sizes an overlay surface in hybrid composition.

Note

Must be called from the platform thread.

Implements flutter::PlatformViewAndroidJNI.

Definition at line 1728 of file platform_view_android_jni_impl.cc.

                {
  JNIEnv* env = fml::jni::AttachCurrentThread();
 
  auto java_object = java_object_.get(env);
  if (java_object.is_null()) {
    return;
  }
 
  env->CallVoidMethod(java_object.obj(), g_on_display_overlay_surface_method,
                      surface_id, x, y, width, height);
 
  FML_CHECK(fml::jni::CheckException(env));
}

FlutterViewEndFrame()

void flutter::PlatformViewAndroidJNIImpl::FlutterViewEndFrame ( )

overridevirtual

Indicates that the current frame ended. It's used to clean up state.

Note

Must be called from the platform thread.

Implements flutter::PlatformViewAndroidJNI.

Definition at line 1760 of file platform_view_android_jni_impl.cc.

                                                     {
  JNIEnv* env = fml::jni::AttachCurrentThread();
 
  auto java_object = java_object_.get(env);
  if (java_object.is_null()) {
    return;
  }
 
  env->CallVoidMethod(java_object.obj(), g_on_end_frame_method);
 
  FML_CHECK(fml::jni::CheckException(env));
}

FlutterViewGetScaledFontSize()

double flutter::PlatformViewAndroidJNIImpl::FlutterViewGetScaledFontSize ( double  unscaled_font_size, int  configuration_id  ) const

overridevirtual

Implements flutter::PlatformViewAndroidJNI.

Definition at line 1347 of file platform_view_android_jni_impl.cc.

                                {
  JNIEnv* env = fml::jni::AttachCurrentThread();
 
  auto java_object = java_object_.get(env);
  if (java_object.is_null()) {
    return -3;
  }
 
  const jfloat scaledSize =
      env->CallFloatMethod(java_object.obj(), g_get_scaled_font_size_method,
                           (jfloat)font_size, (jint)configuration_id);
  FML_CHECK(fml::jni::CheckException(env));
  return (double)scaledSize;
}

FlutterViewHandlePlatformMessage()

void flutter::PlatformViewAndroidJNIImpl::FlutterViewHandlePlatformMessage ( std::unique_ptr< flutter::PlatformMessage >  message, int  responseId  )

overridevirtual

Sends a platform message. The message may be empty.

Implements flutter::PlatformViewAndroidJNI.

Definition at line 1284 of file platform_view_android_jni_impl.cc.

                    {
  // Called from any thread.
  JNIEnv* env = fml::jni::AttachCurrentThread();
 
  auto java_object = java_object_.get(env);
  if (java_object.is_null()) {
    return;
  }
 
  fml::jni::ScopedJavaLocalRef<jstring> java_channel =
      fml::jni::StringToJavaString(env, message->channel());
 
  if (message->hasData()) {
    fml::jni::ScopedJavaLocalRef<jobject> message_array(
        env, env->NewDirectByteBuffer(
                 const_cast<uint8_t*>(message->data().GetMapping()),
                 message->data().GetSize()));
    // Message data is deleted in CleanupMessageData.
    fml::MallocMapping mapping = message->releaseData();
    env->CallVoidMethod(java_object.obj(), g_handle_platform_message_method,
                        java_channel.obj(), message_array.obj(), responseId,
                        reinterpret_cast<jlong>(mapping.Release()));
  } else {
    env->CallVoidMethod(java_object.obj(), g_handle_platform_message_method,
                        java_channel.obj(), nullptr, responseId, nullptr);
  }
 
  FML_CHECK(fml::jni::CheckException(env));
}

FlutterViewHandlePlatformMessageResponse()

void flutter::PlatformViewAndroidJNIImpl::FlutterViewHandlePlatformMessageResponse ( int  responseId, std::unique_ptr< fml::Mapping >  data  )

overridevirtual

Responds to a platform message. The data may be a nullptr.

Implements flutter::PlatformViewAndroidJNI.

Definition at line 1316 of file platform_view_android_jni_impl.cc.

                                    {
  // We are on the platform thread. Attempt to get the strong reference to
  // the Java object.
  JNIEnv* env = fml::jni::AttachCurrentThread();
 
  auto java_object = java_object_.get(env);
  if (java_object.is_null()) {
    // The Java object was collected before this message response got to
    // it. Drop the response on the floor.
    return;
  }
  if (data == nullptr) {  // Empty response.
    env->CallVoidMethod(java_object.obj(),
                        g_handle_platform_message_response_method, responseId,
                        nullptr);
  } else {
    // Convert the vector to a Java byte array.
    fml::jni::ScopedJavaLocalRef<jobject> data_array(
        env, env->NewDirectByteBuffer(const_cast<uint8_t*>(data->GetMapping()),
                                      data->GetSize()));
 
    env->CallVoidMethod(java_object.obj(),
                        g_handle_platform_message_response_method, responseId,
                        data_array.obj());
  }
 
  FML_CHECK(fml::jni::CheckException(env));
}

FlutterViewOnDisplayPlatformView()

void flutter::PlatformViewAndroidJNIImpl::FlutterViewOnDisplayPlatformView ( int  view_id, int  x, int  y, int  width, int  height, int  viewWidth, int  viewHeight, MutatorsStack  mutators_stack  )

overridevirtual

Positions and sizes a platform view if using hybrid composition.

Note

Must be called from the platform thread.

Implements flutter::PlatformViewAndroidJNI.

Definition at line 1647 of file platform_view_android_jni_impl.cc.

                                  {
  JNIEnv* env = fml::jni::AttachCurrentThread();
  auto java_object = java_object_.get(env);
  if (java_object.is_null()) {
    return;
  }
 
  jobject mutatorsStack = env->NewObject(g_mutators_stack_class->obj(),
                                         g_mutators_stack_init_method);
 
  std::vector<std::shared_ptr<Mutator>>::const_iterator iter =
      mutators_stack.Begin();
  while (iter != mutators_stack.End()) {
    switch ((*iter)->GetType()) {
      case kTransform: {
        const SkMatrix& matrix = (*iter)->GetMatrix();
        SkScalar matrix_array[9];
        matrix.get9(matrix_array);
        fml::jni::ScopedJavaLocalRef<jfloatArray> transformMatrix(
            env, env->NewFloatArray(9));
 
        env->SetFloatArrayRegion(transformMatrix.obj(), 0, 9, matrix_array);
        env->CallVoidMethod(mutatorsStack,
                            g_mutators_stack_push_transform_method,
                            transformMatrix.obj());
        break;
      }
      case kClipRect: {
        const SkRect& rect = (*iter)->GetRect();
        env->CallVoidMethod(
            mutatorsStack, g_mutators_stack_push_cliprect_method,
            static_cast<int>(rect.left()), static_cast<int>(rect.top()),
            static_cast<int>(rect.right()), static_cast<int>(rect.bottom()));
        break;
      }
      case kClipRRect: {
        const SkRRect& rrect = (*iter)->GetRRect();
        const SkRect& rect = rrect.rect();
        const SkVector& upper_left = rrect.radii(SkRRect::kUpperLeft_Corner);
        const SkVector& upper_right = rrect.radii(SkRRect::kUpperRight_Corner);
        const SkVector& lower_right = rrect.radii(SkRRect::kLowerRight_Corner);
        const SkVector& lower_left = rrect.radii(SkRRect::kLowerLeft_Corner);
        SkScalar radiis[8] = {
            upper_left.x(),  upper_left.y(),  upper_right.x(), upper_right.y(),
            lower_right.x(), lower_right.y(), lower_left.x(),  lower_left.y(),
        };
        fml::jni::ScopedJavaLocalRef<jfloatArray> radiisArray(
            env, env->NewFloatArray(8));
        env->SetFloatArrayRegion(radiisArray.obj(), 0, 8, radiis);
        env->CallVoidMethod(
            mutatorsStack, g_mutators_stack_push_cliprrect_method,
            static_cast<int>(rect.left()), static_cast<int>(rect.top()),
            static_cast<int>(rect.right()), static_cast<int>(rect.bottom()),
            radiisArray.obj());
        break;
      }
      // TODO(cyanglaz): Implement other mutators.
      // https://github.com/flutter/flutter/issues/58426
      case kClipPath:
      case kOpacity:
      case kBackdropFilter:
        break;
    }
    ++iter;
  }
 
  env->CallVoidMethod(java_object.obj(), g_on_display_platform_view_method,
                      view_id, x, y, width, height, viewWidth, viewHeight,
                      mutatorsStack);
 
  FML_CHECK(fml::jni::CheckException(env));
}

FlutterViewOnFirstFrame()

void flutter::PlatformViewAndroidJNIImpl::FlutterViewOnFirstFrame ( )

overridevirtual

Indicates that FlutterView should start painting pixels.

Note

Must be called from the platform thread.

Implements flutter::PlatformViewAndroidJNI.

Definition at line 1413 of file platform_view_android_jni_impl.cc.

                                                         {
  JNIEnv* env = fml::jni::AttachCurrentThread();
 
  auto java_object = java_object_.get(env);
  if (java_object.is_null()) {
    return;
  }
 
  env->CallVoidMethod(java_object.obj(), g_on_first_frame_method);
 
  FML_CHECK(fml::jni::CheckException(env));
}

FlutterViewOnPreEngineRestart()

void flutter::PlatformViewAndroidJNIImpl::FlutterViewOnPreEngineRestart ( )

overridevirtual

Indicates that a hot restart is about to happen.

Implements flutter::PlatformViewAndroidJNI.

Definition at line 1426 of file platform_view_android_jni_impl.cc.

                                                               {
  JNIEnv* env = fml::jni::AttachCurrentThread();
 
  auto java_object = java_object_.get(env);
  if (java_object.is_null()) {
    return;
  }
 
  env->CallVoidMethod(java_object.obj(), g_on_engine_restart_method);
 
  FML_CHECK(fml::jni::CheckException(env));
}

FlutterViewUpdateCustomAccessibilityActions()

void flutter::PlatformViewAndroidJNIImpl::FlutterViewUpdateCustomAccessibilityActions ( std::vector< uint8_t >  actions_buffer, std::vector< std::string >  strings  )

overridevirtual

Sends new custom accessibility events.

Note

Must be called from the platform thread.

Implements flutter::PlatformViewAndroidJNI.

Definition at line 1389 of file platform_view_android_jni_impl.cc.

                                  {
  JNIEnv* env = fml::jni::AttachCurrentThread();
 
  auto java_object = java_object_.get(env);
  if (java_object.is_null()) {
    return;
  }
 
  fml::jni::ScopedJavaLocalRef<jobject> direct_actions_buffer(
      env,
      env->NewDirectByteBuffer(actions_buffer.data(), actions_buffer.size()));
 
  fml::jni::ScopedJavaLocalRef<jobjectArray> jstrings =
      fml::jni::VectorToStringArray(env, strings);
 
  env->CallVoidMethod(java_object.obj(),
                      g_update_custom_accessibility_actions_method,
                      direct_actions_buffer.obj(), jstrings.obj());
 
  FML_CHECK(fml::jni::CheckException(env));
}

FlutterViewUpdateSemantics()

void flutter::PlatformViewAndroidJNIImpl::FlutterViewUpdateSemantics ( std::vector< uint8_t >  buffer, std::vector< std::string >  strings, std::vector< std::vector< uint8_t > >  string_attribute_args  )

overridevirtual

Sends semantics tree updates.

Note

Must be called from the platform thread.

Implements flutter::PlatformViewAndroidJNI.

Definition at line 1364 of file platform_view_android_jni_impl.cc.

                                                         {
  JNIEnv* env = fml::jni::AttachCurrentThread();
 
  auto java_object = java_object_.get(env);
  if (java_object.is_null()) {
    return;
  }
 
  fml::jni::ScopedJavaLocalRef<jobject> direct_buffer(
      env, env->NewDirectByteBuffer(buffer.data(), buffer.size()));
  fml::jni::ScopedJavaLocalRef<jobjectArray> jstrings =
      fml::jni::VectorToStringArray(env, strings);
  fml::jni::ScopedJavaLocalRef<jobjectArray> jstring_attribute_args =
      fml::jni::VectorToBufferArray(env, string_attribute_args);
 
  env->CallVoidMethod(java_object.obj(), g_update_semantics_method,
                      direct_buffer.obj(), jstrings.obj(),
                      jstring_attribute_args.obj());
 
  FML_CHECK(fml::jni::CheckException(env));
}

GetDisplayDensity()

double flutter::PlatformViewAndroidJNIImpl::GetDisplayDensity ( )

overridevirtual

Implements flutter::PlatformViewAndroidJNI.

Definition at line 1900 of file platform_view_android_jni_impl.cc.

                                                     {
  JNIEnv* env = fml::jni::AttachCurrentThread();
 
  auto java_object = java_object_.get(env);
  if (java_object.is_null()) {
    return -1;
  }
 
  fml::jni::ScopedJavaLocalRef<jclass> clazz(
      env, env->GetObjectClass(java_object.obj()));
  if (clazz.is_null()) {
    return -1;
  }
 
  jfieldID fid = env->GetStaticFieldID(clazz.obj(), "displayDensity", "F");
  return static_cast<double>(env->GetStaticFloatField(clazz.obj(), fid));
}

GetDisplayHeight()

double flutter::PlatformViewAndroidJNIImpl::GetDisplayHeight ( )

overridevirtual

Implements flutter::PlatformViewAndroidJNI.

Definition at line 1882 of file platform_view_android_jni_impl.cc.

                                                    {
  JNIEnv* env = fml::jni::AttachCurrentThread();
 
  auto java_object = java_object_.get(env);
  if (java_object.is_null()) {
    return -1;
  }
 
  fml::jni::ScopedJavaLocalRef<jclass> clazz(
      env, env->GetObjectClass(java_object.obj()));
  if (clazz.is_null()) {
    return -1;
  }
 
  jfieldID fid = env->GetStaticFieldID(clazz.obj(), "displayHeight", "F");
  return static_cast<double>(env->GetStaticFloatField(clazz.obj(), fid));
}

GetDisplayRefreshRate()

double flutter::PlatformViewAndroidJNIImpl::GetDisplayRefreshRate ( )

overridevirtual

Implements flutter::PlatformViewAndroidJNI.

Definition at line 1846 of file platform_view_android_jni_impl.cc.

                                                         {
  JNIEnv* env = fml::jni::AttachCurrentThread();
 
  auto java_object = java_object_.get(env);
  if (java_object.is_null()) {
    return kUnknownDisplayRefreshRate;
  }
 
  fml::jni::ScopedJavaLocalRef<jclass> clazz(
      env, env->GetObjectClass(java_object.obj()));
  if (clazz.is_null()) {
    return kUnknownDisplayRefreshRate;
  }
 
  jfieldID fid = env->GetStaticFieldID(clazz.obj(), "refreshRateFPS", "F");
  return static_cast<double>(env->GetStaticFloatField(clazz.obj(), fid));
}

GetDisplayWidth()

double flutter::PlatformViewAndroidJNIImpl::GetDisplayWidth ( )

overridevirtual

Implements flutter::PlatformViewAndroidJNI.

Definition at line 1864 of file platform_view_android_jni_impl.cc.

                                                   {
  JNIEnv* env = fml::jni::AttachCurrentThread();
 
  auto java_object = java_object_.get(env);
  if (java_object.is_null()) {
    return -1;
  }
 
  fml::jni::ScopedJavaLocalRef<jclass> clazz(
      env, env->GetObjectClass(java_object.obj()));
  if (clazz.is_null()) {
    return -1;
  }
 
  jfieldID fid = env->GetStaticFieldID(clazz.obj(), "displayWidth", "F");
  return static_cast<double>(env->GetStaticFloatField(clazz.obj(), fid));
}

HardwareBufferClose()

void flutter::PlatformViewAndroidJNIImpl::HardwareBufferClose ( JavaLocalRef  hardware_buffer )

overridevirtual

Call close on hardware_buffer.

Implements flutter::PlatformViewAndroidJNI.

Definition at line 1636 of file platform_view_android_jni_impl.cc.

                                  {
  FML_CHECK(g_hardware_buffer_close_method != nullptr);
  JNIEnv* env = fml::jni::AttachCurrentThread();
  if (hardware_buffer.is_null()) {
    return;
  }
  env->CallVoidMethod(hardware_buffer.obj(), g_hardware_buffer_close_method);
  FML_CHECK(fml::jni::CheckException(env));
}

ImageClose()

void flutter::PlatformViewAndroidJNIImpl::ImageClose ( JavaLocalRef  image )

overridevirtual

Call close on image.

Implements flutter::PlatformViewAndroidJNI.

Definition at line 1627 of file platform_view_android_jni_impl.cc.

                                                              {
  JNIEnv* env = fml::jni::AttachCurrentThread();
  if (image.is_null()) {
    return;
  }
  env->CallVoidMethod(image.obj(), g_image_close_method);
  FML_CHECK(fml::jni::CheckException(env));
}

ImageGetHardwareBuffer()

JavaLocalRef flutter::PlatformViewAndroidJNIImpl::ImageGetHardwareBuffer ( JavaLocalRef  image )

overridevirtual

Grab the HardwareBuffer from image.

Implements flutter::PlatformViewAndroidJNI.

Definition at line 1612 of file platform_view_android_jni_impl.cc.

                        {
  FML_CHECK(g_image_get_hardware_buffer_method != nullptr);
  JNIEnv* env = fml::jni::AttachCurrentThread();
  if (image.is_null()) {
    // Return null.
    return JavaLocalRef();
  }
  JavaLocalRef r = JavaLocalRef(
      env,
      env->CallObjectMethod(image.obj(), g_image_get_hardware_buffer_method));
  FML_CHECK(fml::jni::CheckException(env));
  return r;
}

ImageProducerTextureEntryAcquireLatestImage()

JavaLocalRef flutter::PlatformViewAndroidJNIImpl::ImageProducerTextureEntryAcquireLatestImage ( JavaLocalRef  image_texture_entry )

overridevirtual

Acquire the latest image available.

Implements flutter::PlatformViewAndroidJNI.

Definition at line 1585 of file platform_view_android_jni_impl.cc.

                                               {
  JNIEnv* env = fml::jni::AttachCurrentThread();
 
  if (image_producer_texture_entry.is_null()) {
    // Return null.
    return JavaLocalRef();
  }
 
  // Convert the weak reference to ImageTextureEntry into a strong local
  // reference.
  fml::jni::ScopedJavaLocalRef<jobject> image_producer_texture_entry_local_ref(
      env, env->CallObjectMethod(image_producer_texture_entry.obj(),
                                 g_java_weak_reference_get_method));
 
  if (image_producer_texture_entry_local_ref.is_null()) {
    // Return null.
    return JavaLocalRef();
  }
 
  JavaLocalRef r = JavaLocalRef(
      env, env->CallObjectMethod(image_producer_texture_entry_local_ref.obj(),
                                 g_acquire_latest_image_method));
  FML_CHECK(fml::jni::CheckException(env));
  return r;
}

RequestDartDeferredLibrary()

bool flutter::PlatformViewAndroidJNIImpl::RequestDartDeferredLibrary ( int  loading_unit_id )

overridevirtual

Implements flutter::PlatformViewAndroidJNI.

Definition at line 1918 of file platform_view_android_jni_impl.cc.

                         {
  JNIEnv* env = fml::jni::AttachCurrentThread();
 
  auto java_object = java_object_.get(env);
  if (java_object.is_null()) {
    return true;
  }
 
  env->CallVoidMethod(java_object.obj(), g_request_dart_deferred_library_method,
                      loading_unit_id);
 
  FML_CHECK(fml::jni::CheckException(env));
  return true;
}

SurfaceTextureAttachToGLContext()

void flutter::PlatformViewAndroidJNIImpl::SurfaceTextureAttachToGLContext ( JavaLocalRef  surface_texture, int  textureId  )

overridevirtual

Attach the SurfaceTexture to the OpenGL ES context that is current on the calling thread.

Implements flutter::PlatformViewAndroidJNI.

Definition at line 1439 of file platform_view_android_jni_impl.cc.

                   {
  JNIEnv* env = fml::jni::AttachCurrentThread();
 
  if (surface_texture.is_null()) {
    return;
  }
 
  fml::jni::ScopedJavaLocalRef<jobject> surface_texture_local_ref(
      env, env->CallObjectMethod(surface_texture.obj(),
                                 g_java_weak_reference_get_method));
 
  if (surface_texture_local_ref.is_null()) {
    return;
  }
 
  env->CallVoidMethod(surface_texture_local_ref.obj(),
                      g_attach_to_gl_context_method, textureId);
 
  FML_CHECK(fml::jni::CheckException(env));
}

SurfaceTextureDetachFromGLContext()

void flutter::PlatformViewAndroidJNIImpl::SurfaceTextureDetachFromGLContext ( JavaLocalRef  surface_texture )

overridevirtual

Detaches a SurfaceTexture from the OpenGL ES context.

Implements flutter::PlatformViewAndroidJNI.

Definition at line 1563 of file platform_view_android_jni_impl.cc.

                                  {
  JNIEnv* env = fml::jni::AttachCurrentThread();
 
  if (surface_texture.is_null()) {
    return;
  }
 
  fml::jni::ScopedJavaLocalRef<jobject> surface_texture_local_ref(
      env, env->CallObjectMethod(surface_texture.obj(),
                                 g_java_weak_reference_get_method));
  if (surface_texture_local_ref.is_null()) {
    return;
  }
 
  env->CallVoidMethod(surface_texture_local_ref.obj(),
                      g_detach_from_gl_context_method);
 
  FML_CHECK(fml::jni::CheckException(env));
}

SurfaceTextureGetTransformMatrix()

void flutter::PlatformViewAndroidJNIImpl::SurfaceTextureGetTransformMatrix ( JavaLocalRef  surface_texture, SkMatrix &  transform  )

overridevirtual

Gets the transform matrix from the SurfaceTexture. Then, it updates the transform matrix, so it fill the canvas and preserve the aspect ratio.

Implements flutter::PlatformViewAndroidJNI.

Definition at line 1506 of file platform_view_android_jni_impl.cc.

                         {
  JNIEnv* env = fml::jni::AttachCurrentThread();
 
  if (surface_texture.is_null()) {
    return;
  }
 
  fml::jni::ScopedJavaLocalRef<jobject> surface_texture_local_ref(
      env, env->CallObjectMethod(surface_texture.obj(),
                                 g_java_weak_reference_get_method));
  if (surface_texture_local_ref.is_null()) {
    return;
  }
 
  fml::jni::ScopedJavaLocalRef<jfloatArray> transformMatrix(
      env, env->NewFloatArray(16));
 
  env->CallVoidMethod(surface_texture_local_ref.obj(),
                      g_get_transform_matrix_method, transformMatrix.obj());
  FML_CHECK(fml::jni::CheckException(env));
 
  float* m = env->GetFloatArrayElements(transformMatrix.obj(), nullptr);
 
  // SurfaceTexture 4x4 Column Major -> Skia 3x3 Row Major
 
  // SurfaceTexture 4x4 (Column Major):
  // | m[0] m[4] m[ 8] m[12] |
  // | m[1] m[5] m[ 9] m[13] |
  // | m[2] m[6] m[10] m[14] |
  // | m[3] m[7] m[11] m[15] |
 
  // According to Android documentation, the 4x4 matrix returned should be used
  // with texture coordinates in the form (s, t, 0, 1). Since the z component is
  // always 0.0, we are free to ignore any element that multiplies with the z
  // component. Converting this to a 3x3 matrix is easy:
 
  // SurfaceTexture 3x3 (Column Major):
  // | m[0] m[4] m[12] |
  // | m[1] m[5] m[13] |
  // | m[3] m[7] m[15] |
 
  // Skia (Row Major):
  // | m[0] m[1] m[2] |
  // | m[3] m[4] m[5] |
  // | m[6] m[7] m[8] |
 
  SkScalar matrix3[] = {
      m[0], m[4], m[12],  //
      m[1], m[5], m[13],  //
      m[3], m[7], m[15],  //
  };
  env->ReleaseFloatArrayElements(transformMatrix.obj(), m, JNI_ABORT);
  transform.set9(matrix3);
}

SurfaceTextureShouldUpdate()

bool flutter::PlatformViewAndroidJNIImpl::SurfaceTextureShouldUpdate ( JavaLocalRef  surface_texture )

overridevirtual

Returns true if surface_texture should be updated.

Implements flutter::PlatformViewAndroidJNI.

Definition at line 1462 of file platform_view_android_jni_impl.cc.

                                  {
  JNIEnv* env = fml::jni::AttachCurrentThread();
 
  if (surface_texture.is_null()) {
    return false;
  }
 
  fml::jni::ScopedJavaLocalRef<jobject> surface_texture_local_ref(
      env, env->CallObjectMethod(surface_texture.obj(),
                                 g_java_weak_reference_get_method));
  if (surface_texture_local_ref.is_null()) {
    return false;
  }
 
  jboolean shouldUpdate = env->CallBooleanMethod(
      surface_texture_local_ref.obj(), g_surface_texture_wrapper_should_update);
 
  FML_CHECK(fml::jni::CheckException(env));
 
  return shouldUpdate;
}

SurfaceTextureUpdateTexImage()

void flutter::PlatformViewAndroidJNIImpl::SurfaceTextureUpdateTexImage ( JavaLocalRef  surface_texture )

overridevirtual

Updates the texture image to the most recent frame from the image stream.

Implements flutter::PlatformViewAndroidJNI.

Definition at line 1485 of file platform_view_android_jni_impl.cc.

                                  {
  JNIEnv* env = fml::jni::AttachCurrentThread();
 
  if (surface_texture.is_null()) {
    return;
  }
 
  fml::jni::ScopedJavaLocalRef<jobject> surface_texture_local_ref(
      env, env->CallObjectMethod(surface_texture.obj(),
                                 g_java_weak_reference_get_method));
  if (surface_texture_local_ref.is_null()) {
    return;
  }
 
  env->CallVoidMethod(surface_texture_local_ref.obj(),
                      g_update_tex_image_method);
 
  FML_CHECK(fml::jni::CheckException(env));
}

---

The documentation for this class was generated from the following files:

• shell/platform/android/platform_view_android_jni_impl.h
• shell/platform/android/platform_view_android_jni_impl.cc