Class representing a default Emscripten graphics output. More...

#include <kanzi/core.ui/platform/graphics_output/emscripten/default_emscripten_graphics_output.hpp>

Inheritance diagram for kanzi::emscripten::DefaultEmscriptenGraphicsOutput:

Public Member Functions
KZ_NO_DISCARD optional< void * >	createImage (int target, void data, int attributes) noexcept override
	Function for creating native image object, which can be shared between client APIs.

	DefaultEmscriptenGraphicsOutput (const DefaultEmscriptenGraphicsOutputProperties &properties)
	Constructor.

bool	destroyImage (void *image) noexcept override
	Destroys an EGL image.

void	gatherEvents (EventQueue &queue) override
	Amends the given event queue with events received so far.

KZ_NO_DISCARD optional< SurfaceColorSpace >	getColorSpace () const noexcept override
	Gets the color space used by the associated graphics context.

KZ_NO_DISCARD optional< GraphicsContextAPI >	getGraphicsContextAPI () const noexcept override
	Gets the API used by the associated graphics context.

KZ_NO_DISCARD optional< void * >	getNativeContextHandle () const noexcept override
	Gets associated native GL context handle.

KZ_NO_DISCARD optional< void * >	getNativeDisplayHandle () const noexcept override
	Gets associated native GL display handle.

KZ_NO_DISCARD optional< NativeEventHandle >	getNativeEventHandle () const noexcept override
	Returns a waitable event handle for this event source, if available.

KZ_NO_DISCARD optional< void * >	getNativeSurfaceHandle () const noexcept override
	Gets associated native GL surface handle.

KZ_NO_DISCARD GLProcPointer	getProcAddress (string_view functionName) override
	Retrieves pointer to GL function.

KZ_NO_DISCARD optional< SurfaceClientAPI >	getSurfaceClientAPI () const noexcept override
	Gets the type of the associated graphics surface.

KZ_NO_DISCARD Matrix4x4	getTargetTransformation () const noexcept override
	Returns the target transformation.

KZ_NO_DISCARD optional< unsigned int >	getWindowHeight () const noexcept
	Returns the active window height.

KZ_NO_DISCARD optional< unsigned int >	getWindowWidth () const noexcept
	Returns the active window width.

void	logWindowSize () const noexcept
	Prints the active window size to log.

bool	makeCurrent () noexcept override
	Make the current EGL thread active.

bool	releaseCurrent () noexcept override
	Makes the currently active graphics output inactive for the current thread.

bool	swapBuffers () override
	Posts rendering results.

bool	swapInterval (int interval) override
	Sets minimum number of displayed video frames before a buffer swap.

Public Member Functions inherited from kanzi::GraphicsOutput
KZ_NO_DISCARD Vector2	getDpi () const noexcept
	Returns the resolution of the target coordinate system in dots per inch.

KZ_NO_DISCARD unsigned int	getHeight () const noexcept
	Returns the height of layout area in the target coordinate system.

KZ_NO_DISCARD unsigned int	getWidth () const noexcept
	Returns the width of layout area in the target coordinate system.

virtual	~GraphicsOutput ()=default
	Destructor.

Public Member Functions inherited from kanzi::EventSource
virtual	~EventSource ()=default
	Destructor.

Public Member Functions inherited from kanzi::GLGraphicsOutput
virtual	~GLGraphicsOutput ()=default
	Destructor.

Protected Member Functions
void	setTargetTransformation (Matrix4x4 targetTransformation) noexcept
	Sets the target transformation.

bool	updateCachedValues (unsigned int width, unsigned int height) noexcept
	Updates all cached values from given layout size.

Protected Member Functions inherited from kanzi::GraphicsOutput
void	updateDpi (Vector2 dpi)
	Updates the target layout area resolution.

void	updateSize (unsigned int width, unsigned int height)
	Updates the target layout area size.

Additional Inherited Members
Public Types inherited from kanzi::GLGraphicsOutput
using	GLProcPointer
	Pointer to GL function.

Detailed Description

Class representing a default Emscripten graphics output.

Constructor & Destructor Documentation

◆ DefaultEmscriptenGraphicsOutput()

kanzi::emscripten::DefaultEmscriptenGraphicsOutput::DefaultEmscriptenGraphicsOutput ( const DefaultEmscriptenGraphicsOutputProperties & properties )

explicit

Constructor.

Parameters

properties Specifies properties to request for the graphics output.

Member Function Documentation

◆ logWindowSize()

void kanzi::emscripten::DefaultEmscriptenGraphicsOutput::logWindowSize ( ) const

noexcept

Prints the active window size to log.

◆ gatherEvents()

void kanzi::emscripten::DefaultEmscriptenGraphicsOutput::gatherEvents ( EventQueue & queue )

overridevirtual

Amends the given event queue with events received so far.

Parameters

queue Event queue to be amended. Do not clear nor assume to be empty.

Implements kanzi::EventSource.

◆ getNativeEventHandle()

KZ_NO_DISCARD optional< NativeEventHandle > kanzi::emscripten::DefaultEmscriptenGraphicsOutput::getNativeEventHandle ( ) const

overridevirtualnoexcept

Returns a waitable event handle for this event source, if available.

Return values

nullopt Getting the event handle failed.

Returns: The native event handle.

Implements kanzi::EventSource.

◆ getProcAddress()

KZ_NO_DISCARD GLProcPointer kanzi::emscripten::DefaultEmscriptenGraphicsOutput::getProcAddress ( string_view functionName )

overridevirtual

Retrieves pointer to GL function.

Parameters

functionName Name of the function.

Returns: Pointer to the function, or null if not found.

Implements kanzi::GLGraphicsOutput.

◆ makeCurrent()

bool kanzi::emscripten::DefaultEmscriptenGraphicsOutput::makeCurrent ( )

overridevirtualnoexcept

Make the current EGL thread active.

Returns: True on success, false on failure.

Implements kanzi::GLGraphicsOutput.

◆ releaseCurrent()

bool kanzi::emscripten::DefaultEmscriptenGraphicsOutput::releaseCurrent ( )

overridevirtualnoexcept

Makes the currently active graphics output inactive for the current thread.

Returns: True, on success.

Implements kanzi::GLGraphicsOutput.

◆ swapBuffers()

bool kanzi::emscripten::DefaultEmscriptenGraphicsOutput::swapBuffers ( )

overridevirtual

Posts rendering results.

Implicitly flushes the rendering pipeline and executes all received rendering commands before posting.

Returns: True on success, false on failure.

Implements kanzi::GLGraphicsOutput.

◆ swapInterval()

bool kanzi::emscripten::DefaultEmscriptenGraphicsOutput::swapInterval ( int interval )

overridevirtual

Sets minimum number of displayed video frames before a buffer swap.

Parameters

interval Minimum number of video frames to wait before buffer swap.

Returns: True on success, false on failure.

Implements kanzi::GLGraphicsOutput.

◆ getTargetTransformation()

KZ_NO_DISCARD Matrix4x4 kanzi::emscripten::DefaultEmscriptenGraphicsOutput::getTargetTransformation ( ) const

overridevirtualnoexcept

Returns the target transformation.

Returns: Target transformation matrix.

Implements kanzi::GLGraphicsOutput.

◆ getGraphicsContextAPI()

KZ_NO_DISCARD optional< GraphicsContextAPI > kanzi::emscripten::DefaultEmscriptenGraphicsOutput::getGraphicsContextAPI ( ) const

overridevirtualnoexcept

Gets the API used by the associated graphics context.

Return values

nullopt Getting the graphics context failed.

Returns: Graphics context API.

Implements kanzi::GLGraphicsOutput.

◆ getSurfaceClientAPI()

KZ_NO_DISCARD optional< SurfaceClientAPI > kanzi::emscripten::DefaultEmscriptenGraphicsOutput::getSurfaceClientAPI ( ) const

overridevirtualnoexcept

Gets the type of the associated graphics surface.

Return values

nullopt Getting the graphics surface failed.

Returns: Surface type.

Implements kanzi::GLGraphicsOutput.

◆ getColorSpace()

KZ_NO_DISCARD optional< SurfaceColorSpace > kanzi::emscripten::DefaultEmscriptenGraphicsOutput::getColorSpace ( ) const

overridevirtualnoexcept

Gets the color space used by the associated graphics context.

Return values

nullopt Getting the color space failed.

Returns: Color Space.

Implements kanzi::GLGraphicsOutput.

◆ getNativeDisplayHandle()

KZ_NO_DISCARD optional< void * > kanzi::emscripten::DefaultEmscriptenGraphicsOutput::getNativeDisplayHandle ( ) const

overridevirtualnoexcept

Gets associated native GL display handle.

Return values

nullopt Getting GL display failed.

Returns: The handle of associated display object.

Implements kanzi::GLGraphicsOutput.

◆ getNativeContextHandle()

KZ_NO_DISCARD optional< void * > kanzi::emscripten::DefaultEmscriptenGraphicsOutput::getNativeContextHandle ( ) const

overridevirtualnoexcept

Gets associated native GL context handle.

Return values

nullopt Getting GL context failed.

Returns: The handle of associated graphics context object.

Implements kanzi::GLGraphicsOutput.

◆ getNativeSurfaceHandle()

KZ_NO_DISCARD optional< void * > kanzi::emscripten::DefaultEmscriptenGraphicsOutput::getNativeSurfaceHandle ( ) const

overridevirtualnoexcept

Gets associated native GL surface handle.

Return values

nullopt Getting GL surface failed.

Returns: The handle of associated surface object.

Implements kanzi::GLGraphicsOutput.

◆ createImage()

KZ_NO_DISCARD optional< void * > kanzi::emscripten::DefaultEmscriptenGraphicsOutput::createImage	(	int	target,
		void *	data,
		int *	attributes )

overridevirtualnoexcept

Function for creating native image object, which can be shared between client APIs.

The returned image must be destroyed using destroyImage().

Parameters

target	Context-specific target specifier.
data	Data to use as image contents.
attributes	Context-specific attributes list.

Returns: Returns created image, or null on error.

See also: destroyImage().

Implements kanzi::GLGraphicsOutput.

◆ destroyImage()

bool kanzi::emscripten::DefaultEmscriptenGraphicsOutput::destroyImage ( void * image )

overridevirtualnoexcept

Destroys an EGL image.

Parameters

image EGL image to destroy.

Returns: True on success, false on failure.

Implements kanzi::GLGraphicsOutput.

◆ getWindowWidth()

KZ_NO_DISCARD optional< unsigned int > kanzi::emscripten::DefaultEmscriptenGraphicsOutput::getWindowWidth ( ) const

noexcept

Returns the active window width.

Return values

nullopt Getting the width failed.

Returns: Window width in implementation defined units.

◆ getWindowHeight()

KZ_NO_DISCARD optional< unsigned int > kanzi::emscripten::DefaultEmscriptenGraphicsOutput::getWindowHeight ( ) const

noexcept

Returns the active window height.

Return values

nullopt Getting the height failed.

Returns: Window height in implementation defined units.

◆ setTargetTransformation()

void kanzi::emscripten::DefaultEmscriptenGraphicsOutput::setTargetTransformation ( Matrix4x4 targetTransformation )

inlineprotectednoexcept

Sets the target transformation.

Parameters

targetTransformation The target transformation matrix.

◆ updateCachedValues()

bool kanzi::emscripten::DefaultEmscriptenGraphicsOutput::updateCachedValues	(	unsigned int	width,
		unsigned int	height )

protectednoexcept

Updates all cached values from given layout size.

Parameters

width	Layout area width in pixels.
height	Layout area height in pixels.

Returns: True, if the given values were new.

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

kanzi/core.ui/platform/graphics_output/emscripten/default_emscripten_graphics_output.hpp

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ DefaultEmscriptenGraphicsOutput()

Member Function Documentation

◆ logWindowSize()

◆ gatherEvents()

◆ getNativeEventHandle()

◆ getProcAddress()

◆ makeCurrent()

◆ releaseCurrent()

◆ swapBuffers()

◆ swapInterval()

◆ getTargetTransformation()

◆ getGraphicsContextAPI()

◆ getSurfaceClientAPI()

◆ getColorSpace()

◆ getNativeDisplayHandle()

◆ getNativeContextHandle()

◆ getNativeSurfaceHandle()

◆ createImage()

◆ destroyImage()

◆ getWindowWidth()

◆ getWindowHeight()

◆ setTargetTransformation()

◆ updateCachedValues()