#include <dl_image_skia.h>

Inheritance diagram for flutter::DlImageSkia:

Public Member Functions
	DlImageSkia (sk_sp< SkImage > image)

	~DlImageSkia () override

sk_sp< SkImage >	skia_image () const override
	If this display list image is meant to be used by the Skia backend, an SkImage instance. Null otherwise. More...

std::shared_ptr< impeller::Texture >	impeller_texture () const override
	If this display list image is meant to be used by the Impeller backend, an Impeller texture instance. Null otherwise. More...

bool	isOpaque () const override
	If the pixel format of this image ignores alpha, this returns true. This method might conservatively return false when it cannot guarnatee an opaque image, for example when the pixel format of the image supports alpha but the image is made up of entirely opaque pixels. More...

bool	isTextureBacked () const override

bool	isUIThreadSafe () const override
	If the underlying platform image held by this object has no threading requirements for the release of that image (or if arrangements have already been made to forward that image to the correct thread upon deletion), this method returns true. More...

SkISize	dimensions () const override

size_t	GetApproximateByteSize () const override

Public Member Functions inherited from flutter::DlImage
virtual	~DlImage ()

virtual sk_sp< SkImage >	skia_image () const =0
	If this display list image is meant to be used by the Skia backend, an SkImage instance. Null otherwise. More...

virtual std::shared_ptr< impeller::Texture >	impeller_texture () const =0
	If this display list image is meant to be used by the Impeller backend, an Impeller texture instance. Null otherwise. More...

virtual bool	isOpaque () const =0
	If the pixel format of this image ignores alpha, this returns true. This method might conservatively return false when it cannot guarnatee an opaque image, for example when the pixel format of the image supports alpha but the image is made up of entirely opaque pixels. More...

virtual bool	isTextureBacked () const =0

virtual bool	isUIThreadSafe () const =0
	If the underlying platform image held by this object has no threading requirements for the release of that image (or if arrangements have already been made to forward that image to the correct thread upon deletion), this method returns true. More...

virtual SkISize	dimensions () const =0

virtual size_t	GetApproximateByteSize () const =0

int	width () const

int	height () const

SkIRect	bounds () const

virtual OwningContext	owning_context () const

virtual std::optional< std::string >	get_error () const

bool	Equals (const DlImage *other) const

bool	Equals (const DlImage &other) const

bool	Equals (const sk_sp< const DlImage > &other) const

Public Member Functions inherited from SkRefCntBase
	SkRefCntBase ()

virtual	~SkRefCntBase ()

bool	unique () const

void	ref () const

void	unref () const

Additional Inherited Members
Public Types inherited from flutter::DlImage
enum class	OwningContext { kRaster , kIO }

Static Public Member Functions inherited from flutter::DlImage
static sk_sp< DlImage >	Make (const SkImage *image)

static sk_sp< DlImage >	Make (sk_sp< SkImage > image)

Protected Member Functions inherited from flutter::DlImage
	DlImage ()

Detailed Description

Definition at line 13 of file dl_image_skia.h.

Constructor & Destructor Documentation

◆ DlImageSkia()

flutter::DlImageSkia::DlImageSkia ( sk_sp< SkImage > image )

explicit

Definition at line 9 of file dl_image_skia.cc.

9: image_(std::move(image)) {}

SkRecords::image

sk_sp< const SkImage > image

Definition: SkRecords.h:269

◆ ~DlImageSkia()

flutter::DlImageSkia::~DlImageSkia ( )

overridedefault

Member Function Documentation

◆ dimensions()

SkISize flutter::DlImageSkia::dimensions ( ) const

overridevirtual

Returns: The dimensions of the pixel grid.

Implements flutter::DlImage.

Definition at line 46 of file dl_image_skia.cc.

                                      {
  return image_ ? image_->dimensions() : SkISize::MakeEmpty();
}

◆ GetApproximateByteSize()

size_t flutter::DlImageSkia::GetApproximateByteSize ( ) const

overridevirtual

Returns: The approximate byte size of the allocation of this image. This takes into account details such as mip-mapping. The allocation is usually resident in device memory.

Implements flutter::DlImage.

Definition at line 51 of file dl_image_skia.cc.

                                                 {
  auto size = sizeof(*this);
  if (image_) {
    const auto& info = image_->imageInfo();
    const auto kMipmapOverhead = image_->hasMipmaps() ? 4.0 / 3.0 : 1.0;
    const size_t image_byte_size = info.computeMinByteSize() * kMipmapOverhead;
    size += image_byte_size;
  }
  return size;
}

◆ impeller_texture()

std::shared_ptr< impeller::Texture > flutter::DlImageSkia::impeller_texture ( ) const

overridevirtual

If this display list image is meant to be used by the Impeller backend, an Impeller texture instance. Null otherwise.

Returns: An Impeller texture instance or null.

Implements flutter::DlImage.

Definition at line 20 of file dl_image_skia.cc.

                                                                   {
  return nullptr;
}

◆ isOpaque()

bool flutter::DlImageSkia::isOpaque ( ) const

overridevirtual

If the pixel format of this image ignores alpha, this returns true. This method might conservatively return false when it cannot guarnatee an opaque image, for example when the pixel format of the image supports alpha but the image is made up of entirely opaque pixels.

Returns: True if the pixel format of this image ignores alpha.

Implements flutter::DlImage.

Definition at line 25 of file dl_image_skia.cc.

                                 {
  return image_ ? image_->isOpaque() : false;
}

◆ isTextureBacked()

bool flutter::DlImageSkia::isTextureBacked ( ) const

overridevirtual

Implements flutter::DlImage.

Definition at line 30 of file dl_image_skia.cc.

                                        {
  return image_ ? image_->isTextureBacked() : false;
}

◆ isUIThreadSafe()

bool flutter::DlImageSkia::isUIThreadSafe ( ) const

overridevirtual

If the underlying platform image held by this object has no threading requirements for the release of that image (or if arrangements have already been made to forward that image to the correct thread upon deletion), this method returns true.

Returns: True if the underlying image is held in a thread-safe manner.

Implements flutter::DlImage.

Definition at line 35 of file dl_image_skia.cc.

                                       {
  // Technically if the image is null then we are thread-safe, and possibly
  // if the image is constructed from a heap raster as well, but there
  // should never be a leak of an instance of this class into any data that
  // is shared with the UI thread, regardless of value.
  // All images intended to be shared with the UI thread should be constructed
  // via one of the DlImage subclasses designed for that purpose.
  return false;
}

◆ skia_image()

sk_sp< SkImage > flutter::DlImageSkia::skia_image ( ) const

overridevirtual

If this display list image is meant to be used by the Skia backend, an SkImage instance. Null otherwise.

Returns: A Skia image instance or null.

Implements flutter::DlImage.

Definition at line 15 of file dl_image_skia.cc.

                                             {
  return image_;
};

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

display_list/image/dl_image_skia.h
display_list/image/dl_image_skia.cc

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ DlImageSkia()

◆ ~DlImageSkia()

Member Function Documentation

◆ dimensions()

◆ GetApproximateByteSize()

◆ impeller_texture()

◆ isOpaque()

◆ isTextureBacked()

◆ isUIThreadSafe()

◆ skia_image()