flutter::DlImageGPU Class Reference

#include <display_list_image_gpu.h>

Inheritance diagram for flutter::DlImageGPU:

Public Member Functions
	~DlImageGPU () 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.
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.
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.
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.
DlISize	GetSize () const override
virtual size_t	GetApproximateByteSize () const override
Public Member Functions inherited from flutter::DlImage
virtual	~DlImage ()
int	width () const
int	height () const
DlIRect	GetBounds () 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

Static Public Member Functions
static sk_sp< DlImageGPU >	Make (SkiaGPUObject< SkImage > image)
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)

Additional Inherited Members
Public Types inherited from flutter::DlImage
enum class	OwningContext {   kRaster ,   kIO }
Protected Member Functions inherited from flutter::DlImage
	DlImage ()

Detailed Description

Definition at line 14 of file display_list_image_gpu.h.

Constructor & Destructor Documentation

~DlImageGPU()

flutter::DlImageGPU::~DlImageGPU ( )

override

Definition at line 22 of file display_list_image_gpu.cc.

{}

Member Function Documentation

GetApproximateByteSize()

size_t flutter::DlImageGPU::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 62 of file display_list_image_gpu.cc.

                                                {
  auto size = sizeof(*this);
  if (auto image = skia_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;
}

References image, flutter::size, and skia_image().

GetSize()

DlISize flutter::DlImageGPU::GetSize ( ) const

overridevirtual

Returns

The dimensions of the pixel grid.

Implements flutter::DlImage.

Definition at line 56 of file display_list_image_gpu.cc.

                                  {
  const auto image = skia_image();
  return image ? ToDlISize(image->dimensions()) : DlISize();
}

References image, skia_image(), and flutter::ToDlISize().

impeller_texture()

std::shared_ptr< impeller::Texture > flutter::DlImageGPU::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 30 of file display_list_image_gpu.cc.

                                                                  {
  return nullptr;
}

isOpaque()

bool flutter::DlImageGPU::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 35 of file display_list_image_gpu.cc.

                                {
  if (auto image = skia_image()) {
    return image->isOpaque();
  }
  return false;
}

References image, and skia_image().

isTextureBacked()

bool flutter::DlImageGPU::isTextureBacked ( ) const

overridevirtual

Implements flutter::DlImage.

Definition at line 43 of file display_list_image_gpu.cc.

                                       {
  if (auto image = skia_image()) {
    return image->isTextureBacked();
  }
  return false;
}

References image, and skia_image().

isUIThreadSafe()

bool flutter::DlImageGPU::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 51 of file display_list_image_gpu.cc.

                                      {
  return true;
}

Make()

sk_sp< DlImageGPU > flutter::DlImageGPU::Make ( SkiaGPUObject< SkImage >  image )

static

Definition at line 11 of file display_list_image_gpu.cc.

                                                               {
  if (!image.skia_object()) {
    return nullptr;
  }
  return sk_sp<DlImageGPU>(new DlImageGPU(std::move(image)));
}

References image.

Referenced by flutter::ImageDecoderSkia::Decode(), and flutter::Picture::DoRasterizeToImage().

skia_image()

sk_sp< SkImage > flutter::DlImageGPU::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 25 of file display_list_image_gpu.cc.

                                            {
  return image_.skia_object();
};

References flutter::SkiaGPUObject< T >::skia_object().

Referenced by GetApproximateByteSize(), GetSize(), isOpaque(), and isTextureBacked().

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

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