impeller::DlImageImpeller Class Reference

#include <dl_image_impeller.h>

Inheritance diagram for impeller::DlImageImpeller:

Public Member Functions
	~DlImageImpeller () 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.
SkISize	dimensions () const override
size_t	GetApproximateByteSize () const override
OwningContext	owning_context () const override
Public Member Functions inherited from flutter::DlImage
virtual	~DlImage ()
int	width () const
int	height () const
SkIRect	bounds () 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

Static Public Member Functions
static sk_sp< DlImageImpeller >	Make (std::shared_ptr< Texture > texture, OwningContext owning_context=OwningContext::kIO)
static sk_sp< DlImageImpeller >	MakeFromYUVTextures (AiksContext *aiks_context, std::shared_ptr< Texture > y_texture, std::shared_ptr< Texture > uv_texture, YUVColorSpace yuv_color_space)
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 15 of file dl_image_impeller.h.

Constructor & Destructor Documentation

~DlImageImpeller()

impeller::DlImageImpeller::~DlImageImpeller ( )

overridedefault

Member Function Documentation

dimensions()

SkISize impeller::DlImageImpeller::dimensions ( ) const

overridevirtual

Returns

The dimensions of the pixel grid.

Implements flutter::DlImage.

Definition at line 83 of file dl_image_impeller.cc.

                                          {
  const auto size = texture_ ? texture_->GetSize() : ISize{};
  return SkISize::Make(size.width, size.height);
}

GetApproximateByteSize()

size_t impeller::DlImageImpeller::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 89 of file dl_image_impeller.cc.

                                                     {
  auto size = sizeof(*this);
  if (texture_) {
    size += texture_->GetTextureDescriptor().GetByteSizeOfBaseMipLevel();
  }
  return size;
}

impeller_texture()

std::shared_ptr< impeller::Texture > impeller::DlImageImpeller::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 60 of file dl_image_impeller.cc.

                                                                       {
  return texture_;
}

isOpaque()

bool impeller::DlImageImpeller::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 65 of file dl_image_impeller.cc.

                                     {
  // Impeller doesn't currently implement opaque alpha types.
  return false;
}

isTextureBacked()

bool impeller::DlImageImpeller::isTextureBacked ( ) const

overridevirtual

Implements flutter::DlImage.

Definition at line 71 of file dl_image_impeller.cc.

                                            {
  // Impeller textures are always ... textures :/
  return true;
}

isUIThreadSafe()

bool impeller::DlImageImpeller::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 77 of file dl_image_impeller.cc.

                                           {
  // Impeller textures are always thread-safe
  return true;
}

Make()

sk_sp< DlImageImpeller > impeller::DlImageImpeller::Make ( std::shared_ptr< Texture >  texture, OwningContext  owning_context = OwningContext::kIO  )

static

Definition at line 12 of file dl_image_impeller.cc.

                                                                           {
  if (!texture) {
    return nullptr;
  }
  return sk_sp<DlImageImpeller>(
      new DlImageImpeller(std::move(texture), owning_context));
}

MakeFromYUVTextures()

sk_sp< DlImageImpeller > impeller::DlImageImpeller::MakeFromYUVTextures ( AiksContext *  aiks_context, std::shared_ptr< Texture >  y_texture, std::shared_ptr< Texture >  uv_texture, YUVColorSpace  yuv_color_space  )

static

Definition at line 21 of file dl_image_impeller.cc.

                                   {
  if (!aiks_context || !y_texture || !uv_texture) {
    return nullptr;
  }
  auto yuv_to_rgb_filter_contents = FilterContents::MakeYUVToRGBFilter(
      std::move(y_texture), std::move(uv_texture), yuv_color_space);
  impeller::Entity entity;
  entity.SetBlendMode(impeller::BlendMode::kSource);
  auto snapshot = yuv_to_rgb_filter_contents->RenderToSnapshot(
      aiks_context->GetContentContext(),  // renderer
      entity,                             // entity
      std::nullopt,                       // coverage_limit
      std::nullopt,                       // sampler_descriptor
      true,                               // msaa_enabled
      /*mip_count=*/1,
      "MakeYUVToRGBFilter Snapshot");  // label
  if (!snapshot.has_value()) {
    return nullptr;
  }
  return impeller::DlImageImpeller::Make(snapshot->texture);
}

owning_context()

OwningContext impeller::DlImageImpeller::owning_context ( ) const

inlineoverridevirtual

Returns

Specifies which context was used to create this image. The image must be collected on the same task runner as its context.

Reimplemented from flutter::DlImage.

Definition at line 52 of file dl_image_impeller.h.

{ return owning_context_; }

skia_image()

sk_sp< SkImage > impeller::DlImageImpeller::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 55 of file dl_image_impeller.cc.

                                                 {
  return nullptr;
};

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

• impeller/display_list/dl_image_impeller.h
• impeller/display_list/dl_image_impeller.cc