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. More...
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. More...
void	Clear ()
	Remove all entires from the image cache. More...

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