flutter::ImageLRU Class Reference

#include <image_lru.h>

Public Member Functions
	ImageLRU ()=default
	~ImageLRU ()=default
sk_sp< flutter::DlImage >	FindImage (std::optional< HardwareBufferKey > key)
	Retrieve the image associated with the given [key], or nullptr.
HardwareBufferKey	AddImage (const sk_sp< flutter::DlImage > &image, HardwareBufferKey key)
	Add a new image to the cache with a key, returning the key of the LRU entry that was removed.
void	Clear ()
	Remove all entires from the image cache.

Detailed Description

Definition at line 24 of file image_lru.h.

Constructor & Destructor Documentation

ImageLRU()

flutter::ImageLRU::ImageLRU ( )

default

~ImageLRU()

flutter::ImageLRU::~ImageLRU ( )

default

Member Function Documentation

AddImage()

HardwareBufferKey flutter::ImageLRU::AddImage	(	const sk_sp< flutter::DlImage > &	image,
		HardwareBufferKey	key
	)

Add a new image to the cache with a key, returning the key of the LRU entry that was removed.

The value may be 0, in which case nothing was removed.

Definition at line 42 of file image_lru.cc.

                                                            {
  HardwareBufferKey lru_key = images_[kImageReaderSwapchainSize - 1].key;
  bool updated_image = false;
  for (size_t i = 0u; i < kImageReaderSwapchainSize; i++) {
    if (images_[i].key == lru_key) {
      updated_image = true;
      images_[i] = Data{.key = key, .value = image};
      break;
    }
  }
  if (!updated_image) {
    images_[0] = Data{.key = key, .value = image};
  }
  UpdateKey(image, key);
  return lru_key;
}

Clear()

void flutter::ImageLRU::Clear

(

)

Remove all entires from the image cache.

Definition at line 60 of file image_lru.cc.

                     {
  for (size_t i = 0u; i < kImageReaderSwapchainSize; i++) {
    images_[i] = Data{.key = 0u, .value = nullptr};
  }
}

FindImage()

sk_sp< flutter::DlImage > flutter::ImageLRU::FindImage

(

std::optional< HardwareBufferKey >

key

)

Retrieve the image associated with the given [key], or nullptr.

Definition at line 9 of file image_lru.cc.

                                        {
  if (!key.has_value()) {
    return nullptr;
  }
  auto key_value = key.value();
  for (size_t i = 0u; i < kImageReaderSwapchainSize; i++) {
    if (images_[i].key == key_value) {
      auto result = images_[i].value;
      UpdateKey(result, key_value);
      return result;
    }
  }
  return nullptr;
}

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

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