kanzi::connect::LoadImageTask Class Reference

A resource loading task that can be used to retrieve an image from the network using HTTP or HTTPS. More...

#include <load_image_task.hpp>

Inheritance diagram for kanzi::connect::LoadImageTask:

Public Member Functions
virtual void	finishFunction (const KzuResourceLoaderThreadContext *context) override
	A function that is called when the loading is finished.
virtual ResourceSharedPtr	getResult () override
	A function that is called to retrieve the result of the loading.
virtual void	loadFunction (const KzuResourceLoaderThreadContext *context) override
	A function that performs the actual resource loading.
	LoadImageTask (const string &url, Domain *domain)
	Constructor.
virtual	~LoadImageTask ()=default
	Desctructor.

Protected Types
enum class	ImageType { JPG , PNG , UNSUPPORTED }
	Specifies the supported file types. More...

Protected Member Functions
virtual void	decodeKanziBitmap (const KzuResourceLoaderThreadContext *context)
	LoadImageTask (const LoadImageTask &other)=delete
	No copying.
LoadImageTask &	operator= (const LoadImageTask &other)=delete
	No assignment.

Static Protected Member Functions
static ImageType	detectImageType (const unsigned char *buffer, size_t lenght)
	Detect image type based on buffer contents.
static bool	isJpgImage (const unsigned char *buffer, size_t size)
	Check if the given buffer contains a valid signature for JPG file.
static bool	isPngImage (const unsigned char *buffer, size_t size)
	Check if the given buffer contains a valid signature for PNG file.

Protected Attributes
Domain *	m_domain
BitmapImageUniquePtr	m_image
vector< char >	m_imageData
int	m_loadResult
bool	m_statusReported
TextureSharedPtr	m_texture
string	m_url

Detailed Description

A resource loading task that can be used to retrieve an image from the network using HTTP or HTTPS.

Member Enumeration Documentation

ImageType

enum class kanzi::connect::LoadImageTask::ImageType

strongprotected

Specifies the supported file types.

Enumerator
JPG
PNG
UNSUPPORTED

Constructor & Destructor Documentation

LoadImageTask() [1/2]

kanzi::connect::LoadImageTask::LoadImageTask ( const string & url, Domain * domain )

explicit

Constructor.

Parameters

url	HTTP url of the resource.
domain	Kanzi UI Domain.

~LoadImageTask()

virtual kanzi::connect::LoadImageTask::~LoadImageTask ( )

virtualdefault

Desctructor.

LoadImageTask() [2/2]

kanzi::connect::LoadImageTask::LoadImageTask ( const LoadImageTask & other )

protecteddelete

No copying.

Member Function Documentation

decodeKanziBitmap()

virtual void kanzi::connect::LoadImageTask::decodeKanziBitmap ( const KzuResourceLoaderThreadContext * context )

protectedvirtual

detectImageType()

static ImageType kanzi::connect::LoadImageTask::detectImageType ( const unsigned char * buffer, size_t lenght )

staticprotected

Detect image type based on buffer contents.

Parameters

buffer

Contains the image

finishFunction()

virtual void kanzi::connect::LoadImageTask::finishFunction ( const KzuResourceLoaderThreadContext * context )

overridevirtual

A function that is called when the loading is finished.

Parameters

context

Thread context, unused

getResult()

virtual ResourceSharedPtr kanzi::connect::LoadImageTask::getResult ( )

overridevirtual

A function that is called to retrieve the result of the loading.

Returns

A shared pointer to the resource that was loaded.

isJpgImage()

static bool kanzi::connect::LoadImageTask::isJpgImage ( const unsigned char * buffer, size_t size )

staticprotected

Check if the given buffer contains a valid signature for JPG file.

Parameters

buffer

Contains the image

isPngImage()

static bool kanzi::connect::LoadImageTask::isPngImage ( const unsigned char * buffer, size_t size )

staticprotected

Check if the given buffer contains a valid signature for PNG file.

Parameters

buffer

Contains the image

loadFunction()

virtual void kanzi::connect::LoadImageTask::loadFunction ( const KzuResourceLoaderThreadContext * context )

overridevirtual

A function that performs the actual resource loading.

Parameters

context

Thread context, unused

Reimplemented in kanzi::connect::LoadImageTaskHttp.

operator=()

LoadImageTask & kanzi::connect::LoadImageTask::operator= ( const LoadImageTask & other )

protecteddelete

No assignment.

Member Data Documentation

m_domain

Domain* kanzi::connect::LoadImageTask::m_domain

protected

m_image

BitmapImageUniquePtr kanzi::connect::LoadImageTask::m_image

protected

m_imageData

vector<char> kanzi::connect::LoadImageTask::m_imageData

protected

m_loadResult

int kanzi::connect::LoadImageTask::m_loadResult

protected

m_statusReported

bool kanzi::connect::LoadImageTask::m_statusReported

protected

m_texture

TextureSharedPtr kanzi::connect::LoadImageTask::m_texture

protected

m_url

string kanzi::connect::LoadImageTask::m_url

protected

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

• connect/kanzi_adaptation/load_image_task.hpp