flutter::ImageExternalTexture Class Reference

#include <image_external_texture.h>

Inheritance diagram for flutter::ImageExternalTexture:

Public Member Functions
	ImageExternalTexture (int64_t id, const fml::jni::ScopedJavaGlobalRef< jobject > &image_texture_entry, const std::shared_ptr< PlatformViewAndroidJNI > &jni_facade)
virtual	~ImageExternalTexture ()=default
void	Paint (PaintContext &context, const SkRect &bounds, bool freeze, const DlImageSampling sampling) override
void	MarkNewFrameAvailable () override
void	OnTextureUnregistered () override
void	OnGrContextCreated () override
void	OnGrContextDestroyed () override
Public Member Functions inherited from flutter::Texture
	Texture (int64_t id)
virtual	~Texture ()
int64_t	Id ()
Public Member Functions inherited from flutter::ContextListener
	ContextListener ()
	~ContextListener ()

Protected Types
enum class	AttachmentState { kUninitialized , kAttached , kDetached }

Protected Member Functions
virtual void	Attach (PaintContext &context)=0
virtual void	Detach ()=0
virtual void	ProcessFrame (PaintContext &context, const SkRect &bounds)=0
JavaLocalRef	AcquireLatestImage ()
void	CloseImage (const fml::jni::JavaRef< jobject > &image)
JavaLocalRef	HardwareBufferFor (const fml::jni::JavaRef< jobject > &image)
void	CloseHardwareBuffer (const fml::jni::JavaRef< jobject > &hardware_buffer)
AHardwareBuffer *	AHardwareBufferFor (const fml::jni::JavaRef< jobject > &hardware_buffer)
	FML_DISALLOW_COPY_AND_ASSIGN (ImageExternalTexture)

Protected Attributes
fml::jni::ScopedJavaGlobalRef< jobject >	image_texture_entry_
std::shared_ptr< PlatformViewAndroidJNI >	jni_facade_
AttachmentState	state_ = AttachmentState::kUninitialized
sk_sp< flutter::DlImage >	dl_image_
ImageLRU	image_lru_ = ImageLRU()

Detailed Description

Definition at line 21 of file image_external_texture.h.

Member Enumeration Documentation

AttachmentState

enum class flutter::ImageExternalTexture::AttachmentState

strongprotected

Enumerator
kUninitialized
kAttached
kDetached

Definition at line 63 of file image_external_texture.h.

{ kUninitialized, kAttached, kDetached };

Constructor & Destructor Documentation

ImageExternalTexture()

flutter::ImageExternalTexture::ImageExternalTexture ( int64_t  id, const fml::jni::ScopedJavaGlobalRef< jobject > &  image_texture_entry, const std::shared_ptr< PlatformViewAndroidJNI > &  jni_facade  )

explicit

Definition at line 16 of file image_external_texture.cc.

    : Texture(id),
      image_texture_entry_(image_texture_entry),
      jni_facade_(jni_facade) {}

~ImageExternalTexture()

virtual flutter::ImageExternalTexture::~ImageExternalTexture ( )

virtualdefault

Member Function Documentation

AcquireLatestImage()

JavaLocalRef flutter::ImageExternalTexture::AcquireLatestImage ( )

protected

Definition at line 74 of file image_external_texture.cc.

                                                      {
  JNIEnv* env = fml::jni::AttachCurrentThread();
  FML_CHECK(env != nullptr);
 
  // ImageTextureEntry.acquireLatestImage.
  JavaLocalRef image_java =
      jni_facade_->ImageProducerTextureEntryAcquireLatestImage(
          JavaLocalRef(image_texture_entry_));
  return image_java;
}

AHardwareBufferFor()

AHardwareBuffer * flutter::ImageExternalTexture::AHardwareBufferFor ( const fml::jni::JavaRef< jobject > &  hardware_buffer )

protected

Definition at line 109 of file image_external_texture.cc.

                                                   {
  JNIEnv* env = fml::jni::AttachCurrentThread();
  FML_CHECK(env != nullptr);
  const auto& proc =
      impeller::android::GetProcTable().AHardwareBuffer_fromHardwareBuffer;
  return proc ? proc(env, hardware_buffer.obj()) : nullptr;
}

Attach()

virtual void flutter::ImageExternalTexture::Attach ( PaintContext &  context )

protectedpure virtual

Implemented in flutter::ImageExternalTextureGL, flutter::ImageExternalTextureGLSkia, flutter::ImageExternalTextureGLImpeller, and flutter::ImageExternalTextureVK.

CloseHardwareBuffer()

void flutter::ImageExternalTexture::CloseHardwareBuffer ( const fml::jni::JavaRef< jobject > &  hardware_buffer )

protected

Definition at line 92 of file image_external_texture.cc.

                                                   {
  if (hardware_buffer.obj() == nullptr) {
    return;
  }
  jni_facade_->HardwareBufferClose(JavaLocalRef(hardware_buffer));
}

CloseImage()

void flutter::ImageExternalTexture::CloseImage ( const fml::jni::JavaRef< jobject > &  image )

protected

Definition at line 85 of file image_external_texture.cc.

                                                                         {
  if (image.obj() == nullptr) {
    return;
  }
  jni_facade_->ImageClose(JavaLocalRef(image));
}

Detach()

virtual void flutter::ImageExternalTexture::Detach ( )

protectedpure virtual

Implemented in flutter::ImageExternalTextureGL, flutter::ImageExternalTextureGLSkia, flutter::ImageExternalTextureGLImpeller, and flutter::ImageExternalTextureVK.

FML_DISALLOW_COPY_AND_ASSIGN()

flutter::ImageExternalTexture::FML_DISALLOW_COPY_AND_ASSIGN ( ImageExternalTexture  )

protected

HardwareBufferFor()

JavaLocalRef flutter::ImageExternalTexture::HardwareBufferFor ( const fml::jni::JavaRef< jobject > &  image )

protected

Definition at line 100 of file image_external_texture.cc.

                                         {
  if (image.obj() == nullptr) {
    return JavaLocalRef();
  }
  // Image.getHardwareBuffer.
  return jni_facade_->ImageGetHardwareBuffer(JavaLocalRef(image));
}

MarkNewFrameAvailable()

void flutter::ImageExternalTexture::MarkNewFrameAvailable ( )

overridevirtual

Implements flutter::Texture.

Definition at line 52 of file image_external_texture.cc.

                                                 {
  // NOOP.
}

OnGrContextCreated()

void flutter::ImageExternalTexture::OnGrContextCreated ( )

overridevirtual

Implements flutter::ContextListener.

Definition at line 60 of file image_external_texture.cc.

                                              {
  state_ = AttachmentState::kUninitialized;
}

OnGrContextDestroyed()

void flutter::ImageExternalTexture::OnGrContextDestroyed ( )

overridevirtual

Implements flutter::ContextListener.

Definition at line 65 of file image_external_texture.cc.

                                                {
  if (state_ == AttachmentState::kAttached) {
    dl_image_.reset();
    image_lru_.Clear();
    Detach();
  }
  state_ = AttachmentState::kDetached;
}

OnTextureUnregistered()

void flutter::ImageExternalTexture::OnTextureUnregistered ( )

overridevirtual

Implements flutter::Texture.

Definition at line 57 of file image_external_texture.cc.

{}

Paint()

void flutter::ImageExternalTexture::Paint ( PaintContext &  context, const SkRect &  bounds, bool  freeze, const DlImageSampling  sampling  )

overridevirtual

Implements flutter::Texture.

Definition at line 25 of file image_external_texture.cc.

                                                                 {
  if (state_ == AttachmentState::kDetached) {
    return;
  }
  Attach(context);
  const bool should_process_frame = !freeze;
  if (should_process_frame) {
    ProcessFrame(context, bounds);
  }
  if (dl_image_) {
    context.canvas->DrawImageRect(
        dl_image_,                                     // image
        SkRect::Make(dl_image_->bounds()),             // source rect
        bounds,                                        // destination rect
        sampling,                                      // sampling
        context.paint,                                 // paint
        flutter::DlCanvas::SrcRectConstraint::kStrict  // enforce edges
    );
  } else {
    FML_LOG(INFO) << "No DlImage available for ImageExternalTexture to paint.";
  }
}

ProcessFrame()

virtual void flutter::ImageExternalTexture::ProcessFrame ( PaintContext &  context, const SkRect &  bounds  )

protectedpure virtual

Implemented in flutter::ImageExternalTextureGL, and flutter::ImageExternalTextureVK.

Member Data Documentation

dl_image_

sk_sp<flutter::DlImage> flutter::ImageExternalTexture::dl_image_

protected

Definition at line 65 of file image_external_texture.h.

image_lru_

ImageLRU flutter::ImageExternalTexture::image_lru_ = ImageLRU()

protected

Definition at line 66 of file image_external_texture.h.

image_texture_entry_

fml::jni::ScopedJavaGlobalRef<jobject> flutter::ImageExternalTexture::image_texture_entry_

protected

Definition at line 60 of file image_external_texture.h.

jni_facade_

std::shared_ptr<PlatformViewAndroidJNI> flutter::ImageExternalTexture::jni_facade_

protected

Definition at line 61 of file image_external_texture.h.

state_

AttachmentState flutter::ImageExternalTexture::state_ = AttachmentState::kUninitialized

protected

Definition at line 64 of file image_external_texture.h.

---

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

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