flutter::ImageShader Class Reference

#include <image_shader.h>

Inheritance diagram for flutter::ImageShader:

Public Member Functions
	~ImageShader () override
Dart_Handle	initWithImage (CanvasImage *image, DlTileMode tmx, DlTileMode tmy, int filter_quality_index, Dart_Handle matrix_handle)
std::shared_ptr< DlColorSource >	shader (DlImageSampling) override
int	width ()
int	height ()
void	dispose ()
Public Member Functions inherited from flutter::Shader
	~Shader () override
Public Member Functions inherited from flutter::RefCountedDartWrappable< Shader >
virtual void	RetainDartWrappableReference () const override
virtual void	ReleaseDartWrappableReference () const override
Public Member Functions inherited from fml::RefCountedThreadSafe< T >
void	Release () const
Public Member Functions inherited from fml::internal::RefCountedThreadSafeBase
void	AddRef () const
bool	HasOneRef () const
void	AssertHasOneRef () const
Public Member Functions inherited from tonic::DartWrappable
	DartWrappable ()
virtual const DartWrapperInfo &	GetDartWrapperInfo () const =0
Dart_Handle	CreateDartWrapper (DartState *dart_state)
void	AssociateWithDartWrapper (Dart_Handle wrappable)
void	ClearDartWrapper ()
Dart_WeakPersistentHandle	dart_wrapper () const

Static Public Member Functions
static void	Create (Dart_Handle wrapper)

Additional Inherited Members
Public Types inherited from tonic::DartWrappable
enum	DartNativeFields { kPeerIndex , kNumberOfNativeFields }
Protected Member Functions inherited from flutter::Shader
	Shader ()
Protected Member Functions inherited from fml::RefCountedThreadSafe< T >
	RefCountedThreadSafe ()
	~RefCountedThreadSafe ()
Protected Member Functions inherited from fml::internal::RefCountedThreadSafeBase
	RefCountedThreadSafeBase ()
	~RefCountedThreadSafeBase ()
bool	Release () const
void	Adopt ()
Protected Member Functions inherited from tonic::DartWrappable
virtual	~DartWrappable ()
Static Protected Member Functions inherited from tonic::DartWrappable
static Dart_PersistentHandle	GetTypeForWrapper (tonic::DartState *dart_state, const tonic::DartWrapperInfo &wrapper_info)

Detailed Description

Definition at line 19 of file image_shader.h.

Constructor & Destructor Documentation

~ImageShader()

flutter::ImageShader::~ImageShader ( )

overridedefault

Member Function Documentation

Create()

void flutter::ImageShader::Create ( Dart_Handle  wrapper )

static

Definition at line 21 of file image_shader.cc.

                                            {
  auto res = fml::MakeRefCounted<ImageShader>();
  res->AssociateWithDartWrapper(wrapper);
}

dispose()

void flutter::ImageShader::dispose

(

)

Definition at line 65 of file image_shader.cc.

                          {
  cached_shader_.reset();
  image_.reset();
  ClearDartWrapper();
}

height()

int flutter::ImageShader::height

(

)

Definition at line 61 of file image_shader.cc.

                        {
  return image_->height();
}

initWithImage()

Dart_Handle flutter::ImageShader::initWithImage	(	CanvasImage *	image,
		DlTileMode	tmx,
		DlTileMode	tmy,
		int	filter_quality_index,
		Dart_Handle	matrix_handle
	)

Definition at line 26 of file image_shader.cc.

                                                                  {
  // CanvasImage should have already checked for a UI thread safe image.
  if (!image || !image->image()->isUIThreadSafe()) {
    return ToDart("ImageShader constructor called with non-genuine Image.");
  }
 
  image_ = image->image();
  tonic::Float64List matrix4(matrix_handle);
  SkMatrix local_matrix = ToSkMatrix(matrix4);
  matrix4.Release();
  sampling_is_locked_ = filter_quality_index >= 0;
  DlImageSampling sampling =
      sampling_is_locked_ ? ImageFilter::SamplingFromIndex(filter_quality_index)
                          : DlImageSampling::kLinear;
  cached_shader_ = std::make_shared<DlImageColorSource>(
      image_, tmx, tmy, sampling, &local_matrix);
  FML_DCHECK(cached_shader_->isUIThreadSafe());
  return Dart_Null();
}

shader()

std::shared_ptr< DlColorSource > flutter::ImageShader::shader ( DlImageSampling  sampling )

overridevirtual

Implements flutter::Shader.

Definition at line 50 of file image_shader.cc.

                                                                         {
  if (sampling_is_locked_ || sampling == cached_shader_->sampling()) {
    return cached_shader_;
  }
  return cached_shader_->with_sampling(sampling);
}

width()

int flutter::ImageShader::width

(

)

Definition at line 57 of file image_shader.cc.

                       {
  return image_->width();
}

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

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