flutter::ImpellerAllocator Class Reference

#include <image_decoder_impeller.h>

Inheritance diagram for flutter::ImpellerAllocator:

Public Member Functions
	ImpellerAllocator (std::shared_ptr< impeller::Allocator > allocator)
	~ImpellerAllocator ()=default
bool	allocPixelRef (SkBitmap *bitmap) override
std::shared_ptr< impeller::DeviceBuffer >	GetDeviceBuffer () const

Detailed Description

Definition at line 27 of file image_decoder_impeller.h.

Constructor & Destructor Documentation

ImpellerAllocator()

flutter::ImpellerAllocator::ImpellerAllocator ( std::shared_ptr< impeller::Allocator >  allocator )

explicit

Definition at line 739 of file image_decoder_impeller.cc.

    : allocator_(std::move(allocator)) {}

~ImpellerAllocator()

flutter::ImpellerAllocator::~ImpellerAllocator ( )

default

Member Function Documentation

allocPixelRef()

bool flutter::ImpellerAllocator::allocPixelRef ( SkBitmap *  bitmap )

override

Definition at line 748 of file image_decoder_impeller.cc.

                                                      {
  if (!bitmap) {
    return false;
  }
  const SkImageInfo& info = bitmap->info();
  if (kUnknown_SkColorType == info.colorType() || info.width() < 0 ||
      info.height() < 0 || !info.validRowBytes(bitmap->rowBytes())) {
    return false;
  }
 
  impeller::DeviceBufferDescriptor descriptor;
  descriptor.storage_mode = impeller::StorageMode::kHostVisible;
  descriptor.size = ((bitmap->height() - 1) * bitmap->rowBytes()) +
                    (bitmap->width() * bitmap->bytesPerPixel());
 
  std::shared_ptr<impeller::DeviceBuffer> device_buffer =
      allocator_->CreateBuffer(descriptor);
  if (!device_buffer) {
    return false;
  }
 
  struct ImpellerPixelRef final : public SkPixelRef {
    ImpellerPixelRef(int w, int h, void* s, size_t r)
        : SkPixelRef(w, h, s, r) {}
 
    ~ImpellerPixelRef() override {}
  };
 
  auto pixel_ref = sk_sp<SkPixelRef>(
      new ImpellerPixelRef(info.width(), info.height(),
                           device_buffer->OnGetContents(), bitmap->rowBytes()));
 
  bitmap->setPixelRef(std::move(pixel_ref), 0, 0);
  buffer_ = std::move(device_buffer);
  return true;
}

References bitmap, flutter::h, impeller::kHostVisible, impeller::DeviceBufferDescriptor::size, and impeller::DeviceBufferDescriptor::storage_mode.

GetDeviceBuffer()

std::shared_ptr< impeller::DeviceBuffer > flutter::ImpellerAllocator::GetDeviceBuffer

(

)

const

Definition at line 743 of file image_decoder_impeller.cc.

          {
  return buffer_;
}

---

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

• lib/ui/painting/image_decoder_impeller.h
• lib/ui/painting/image_decoder_impeller.cc