PBuffer implementation of EGL When supported, PBuffer is a surface-less implementation of OpenGL. More...

#include <OgreEglPBufferWindow.h>

Inheritance diagram for Ogre::EglPBufferWindow:

Public Member Functions
	EglPBufferWindow (const String &title, uint32 width, uint32 height, bool fullscreenMode, const NameValuePairList miscParams, Ogre::EglPBufferSupport glsupport)

virtual	~EglPBufferWindow ()

virtual void	_initialize (TextureGpuManager *textureManager)

virtual void	_setVisible (bool visible)
	Internal method to notify the window it has been obscured or minimized. More...

virtual void	destroy ()

virtual void	getCustomAttribute (IdString name, void *pData)

virtual bool	isClosed () const
	Indicates whether the window has been closed by the user. More...

bool	isHidden () const
	Indicates whether the window was set to hidden (not displayed) More...

bool	isVisible () const

virtual void	reposition (int32 left, int32 top)

void	requestFullscreenSwitch (bool goFullscreen, bool borderless, uint32 monitorIdx, uint32 width, uint32 height, uint32 frequencyNumerator, uint32 frequencyDenominator)
	Requests to toggle between fullscreen and windowed mode. More...

void	requestResolution (uint32 width, uint32 height)
	Requests a change in resolution. More...

bool	requiresTextureFlipping () const

void	setHidden (bool hidden)
	Hide (or show) the window. More...

virtual void	setVSync (bool vSync, uint32 vSyncInterval)
	Turns VSync on/off. More...

void	swapBuffers ()

Public Member Functions inherited from Ogre::Window
	Window (const String &title, uint32 widthPt, uint32 heightPt, bool fullscreenMode)

virtual	~Window ()

void	_setPrimary ()
	Indicates that this is the primary window. More...

virtual bool	canDownloadData () const
	Returns true if you can download to CPU (i.e. More...

bool	getBorderless () const

TextureGpu *	getDepthBuffer () const

uint32	getFrequencyDenominator () const

uint32	getFrequencyNumerator () const

uint32	getHeight () const

virtual void	getMetrics (uint32 &width, uint32 &height, int32 &left, int32 &top) const
	Overloaded version of getMetrics from RenderTarget, including extra details specific to windowing systems. More...

PixelFormatGpu	getPixelFormat () const

uint32	getRequestedHeightPt () const

uint32	getRequestedWidthPt () const

SampleDescription	getSampleDescription () const

TextureGpu *	getStencilBuffer () const

TextureGpu *	getTexture () const
	WARNING: Attempting to change the TextureGpu (e.g. More...

const String &	getTitle () const

virtual float	getViewPointToPixelScale () const
	Many windowing systems that support HiDPI displays use special points to specify size of the windows and controls, so that windows and controls with hardcoded sizes does not become too small on HiDPI displays. More...

bool	getVSync () const

uint32	getVSyncInterval () const

uint32	getWidth () const

bool	isFocused () const

bool	isFullscreen () const
	Returns true if we are currently in fullscreen mode. More...

virtual bool	isManualSwapRelease () const
	Returns the value set by setManualSwapRelease when supported. More...

bool	isMultisample () const

bool	isPrimary () const

virtual void	performManualRelease ()
	See Window::setManualSwapRelease. More...

virtual void	setBorderless (bool borderless)

virtual void	setFocused (bool focused)

virtual void	setFsaa (const String &fsaa)
	Set the FSAA mode to be used if hardware support it. More...

virtual void	setManualSwapRelease (bool bManualRelease)
	Metal doesn't want us to hold on to a drawable after presenting. More...

virtual void	setTitle (const String &title)

virtual void	setWantsToDownload (bool bWantsToDownload)
	On Metal you must call this function and set it to true in order to take pictures. More...

bool	wantsToGoFullscreen () const
	Returns true if we are in windowed mode right now, but want to go fullscreen. More...

bool	wantsToGoWindowed () const
	Returns true if we are in fullscreen mode right now, but want to go windowed mode. More...

virtual void	windowMovedOrResized ()
	Notify that the window has been resized. More...

Detailed Description

PBuffer implementation of EGL When supported, PBuffer is a surface-less implementation of OpenGL.

This means the window is a dummy hidden window that can run without X11 or Wayland servers as long as DRM is supported.

This is ideal for running a headless server in a terminal, an SSH session or the cloud

While support has been geared mostly towards Linux, it may run on Windows. However I do not know whether drivers support it.

Pass parameter "Device" to RenderSystem::setConfigOption. Mesa drivers typically expose "EGL_EXT_device_drm" (an actual GPU) and "EGL_MESA_device_software" (SW emulation)

Remarks: Due to drivers not caring too much about PBuffer support (e.g. sRGB is an afterthought, depth buffers may not be 32-bits) we create a 1x1 PBuffer to get OpenGL up, but we don't expose it to the user.

Instead we create a regular FBO for rendering with the requested settings (resolution, sRGB, depth buffer). This means implementation details such as requiresTextureFlipping must behave the same way as regular FBOs, and is inconsistent with the other GL Window backends

Constructor & Destructor Documentation

◆ EglPBufferWindow()

Ogre::EglPBufferWindow::EglPBufferWindow	(	const String &	title,
		uint32	width,
		uint32	height,
		bool	fullscreenMode,
		const NameValuePairList *	miscParams,
		Ogre::EglPBufferSupport *	glsupport
	)

◆ ~EglPBufferWindow()

virtual Ogre::EglPBufferWindow::~EglPBufferWindow ( )

virtual

Member Function Documentation

◆ _initialize()

virtual void Ogre::EglPBufferWindow::_initialize ( TextureGpuManager * textureManager )

virtual

Implements Ogre::Window.

◆ _setVisible()

virtual void Ogre::EglPBufferWindow::_setVisible ( bool visible )

virtual

Internal method to notify the window it has been obscured or minimized.

Implements Ogre::Window.

◆ destroy()

virtual void Ogre::EglPBufferWindow::destroy ( )

virtual

Implements Ogre::Window.

◆ getCustomAttribute()

virtual void Ogre::EglPBufferWindow::getCustomAttribute	(	IdString	name,
		void *	pData
	)

virtual

Remarks: Get custom attribute; the following attributes are valid: GLCONTEXT The Ogre GL3PlusContext used for rendering.

Reimplemented from Ogre::Window.

◆ isClosed()

virtual bool Ogre::EglPBufferWindow::isClosed ( ) const

virtual

Indicates whether the window has been closed by the user.

Implements Ogre::Window.

◆ isHidden()

bool Ogre::EglPBufferWindow::isHidden ( ) const

inlinevirtual

Indicates whether the window was set to hidden (not displayed)

Implements Ogre::Window.

◆ isVisible()

bool Ogre::EglPBufferWindow::isVisible ( ) const

virtual

Implements Ogre::Window.

◆ reposition()

virtual void Ogre::EglPBufferWindow::reposition	(	int32	left,
		int32	top
	)

virtual

Implements Ogre::Window.

◆ requestFullscreenSwitch()

void Ogre::EglPBufferWindow::requestFullscreenSwitch	(	bool	goFullscreen,
		bool	borderless,
		uint32	monitorIdx,
		uint32	widthPt,
		uint32	heightPt,
		uint32	frequencyNumerator,
		uint32	frequencyDenominator
	)

virtual

Requests to toggle between fullscreen and windowed mode.

Remarks: Use wantsToGoFullscreen & wantsToGoWindowed to know what you've requested. Same remarks as requestResolution apply: If we request to go fullscreen, wantsToGoFullscreen will return true. But if get word from OS saying we stay in windowed mode, wantsToGoFullscreen will start returning false.

Parameters

goFullscreen	True to go fullscreen, false to go windowed mode.
borderless	Whether to be borderless. Only useful if goFullscreen == false;
monitorIdx
widthPt	New width. Leave 0 if you don't care.
heightPt	New height. Leave 0 if you don't care.
frequencyNumerator	New frequency (fullscreen only). Leave 0 if you don't care.
frequencyDenominator	New frequency (fullscreen only). Leave 0 if you don't care.

Reimplemented from Ogre::Window.

◆ requestResolution()

void Ogre::EglPBufferWindow::requestResolution	(	uint32	width,
		uint32	height
	)

virtual

Requests a change in resolution.

Change is not immediate. Use getRequestedWidthPt & getRequestedHeightPt if you need to know what you've requested, but beware you may not get that resolution, and once we get word from the OS, getRequested{Width/Height}Pt will change again so that getWidth == getRequestedWidthPt * getViewPointToPixelScale.

Reimplemented from Ogre::Window.

◆ requiresTextureFlipping()

bool Ogre::EglPBufferWindow::requiresTextureFlipping ( ) const

inline

◆ setHidden()

void Ogre::EglPBufferWindow::setHidden ( bool hidden )

virtual

Hide (or show) the window.

If called with hidden=true, this will make the window completely invisible to the user.

Remarks: Setting a window to hidden is useful to create a dummy primary RenderWindow hidden from the user so that you can create and recreate your actual RenderWindows without having to recreate all your resources.

Implements Ogre::Window.

◆ setVSync()

virtual void Ogre::EglPBufferWindow::setVSync	(	bool	vSync,
		uint32	vSyncInterval
	)

virtual

Turns VSync on/off.

Parameters

vSync
vSyncInterval	When true, specifies how often the screen should be updated. e.g. at 60hz: vSyncInterval = 1 then update at 60hz vSyncInterval = 2 then update at 30hz vSyncInterval = 3 then update at 15hz vSyncInterval = 4 then update at 7.5hz

If the 31st bit is set, i.e. 0x80000000, then lowest latency mode, aka mailbox, will be used (which doesn't limit the framerate)

Reimplemented from Ogre::Window.

◆ swapBuffers()

void Ogre::EglPBufferWindow::swapBuffers ( )

virtual

Implements Ogre::Window.

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

OgreEglPBufferWindow.h

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ EglPBufferWindow()

◆ ~EglPBufferWindow()

Member Function Documentation

◆ _initialize()

◆ _setVisible()

◆ destroy()

◆ getCustomAttribute()

◆ isClosed()

◆ isHidden()

◆ isVisible()

◆ reposition()

◆ requestFullscreenSwitch()

◆ requestResolution()

◆ requiresTextureFlipping()

◆ setHidden()

◆ setVSync()

◆ swapBuffers()