Component for OpenGL rendering. More...

#include <Inventor/Xt/SoXtGLWidget.h>

Inheritance diagram for SoXtGLWidget:

Public Types
enum	FloatColorBufferSize { FLOAT_16_COLOR_BUFFER = SoGuiGLWidget::FLOAT_16_COLOR_BUFFER , FLOAT_32_COLOR_BUFFER = SoGuiGLWidget::FLOAT_32_COLOR_BUFFER }
	FloatColorBufferSize. More...

Public Member Functions
int	getColorMapSize ()
	Returns the color map size.

virtual Window	getNormalWindow ()
	Gets the current normal GL window, which is needed as an argument to glXMakeCurrent() when drawing in the normal planes.

SbGlContextHelper::GLContext	getNormalContext () const
	Gets the current normal context, which is needed as an argument to glXMakeCurrent() when drawing in the normal planes.

SoGLContext *	getNormalSoContext () const

SoWidget	getNormalWidget () const
	Gets the current normal widget, which is needed as an argument to glXMakeCurrent() when drawing in the normal planes.

virtual void	setNormalVisual (XVisualInfo *vis)
	Specify exactly what the visual should be for the normal window.

XVisualInfo *	getNormalVisual ()
	Returns the visual for the normal window.

virtual void	setDoubleBuffer (SbBool onOrOff)
	Routine that dynamically changes between single and double buffering.

SbBool	isDoubleBuffer ()
	Returns whether double buffering is on or off.

void	setAntialiasing (const float quality, const SoSceneManager::AntialiasingMode mode=SoSceneManager::AUTO)
	Enable (or disable) antialiasing with specified quality and mode.

void	setAntialiasing (SoAntialiasingParameters *advancedParameters)
	Enable (or disable) antialiasing with specific parameters.

float	getAntialiasingQuality () const
	Returns the antialiasing quality set using the setAntialiasing(float,AntialiasingMode) method.

SoSceneManager::AntialiasingMode	getAntialiasingMode () const
	Returns the antialiasing mode set using the setAntialiasing(float,AntialiasingMode) method.

SoAntialiasingParameters *	getAntialiasingParameters () const
	Returns the antialiasing parameters set using the setAntialiasing(SoAntialiasingParameters*) method.

void	setBorder (SbBool onOrOff)
	Shows/hides a border of thickness 3 around the glX widgets.

SbBool	isBorder () const
	Returns whether the border is on or off.

void	setDrawToFrontBufferEnable (SbBool enableFlag)
	Sets drawing to the front buffer.

SbBool	isDrawToFrontBufferEnable () const
	Queries drawing to the front buffer.

virtual SbBool	bindNormalContext ()
	Makes the normal rendering context the current context.

virtual SbBool	unbindNormalContext ()
	unbind the current context (previously bind with bindNormalContext );

virtual SbBool	swapNormalBuffers ()
	Swaps the normal front and back buffers.

SoGLGraphicConfigTemplate *	getGraphicConfigTemplate ()
	Gets the current graphics configuration template.

void	setGraphicConfigTemplate (SoGLGraphicConfigTemplate *gTemplate)
	Sets a new graphics configuration template.

void	setFloatingColorBuffer (SbBool enable, FloatColorBufferSize size=FLOAT_16_COLOR_BUFFER)
	Enables/disables floating point rendering using 16- or 32-bit components.

void	getFloatingColorBuffer (SbBool &enable, FloatColorBufferSize &size)
	Returns TRUE if floating point rendering is used and its precision.

bool	saveSnapshot (const SbString &filename, bool overwrite=true)
	Save a snapshot of the current image displayed in the viewer.

Public Member Functions inherited from SoXtComponent
virtual void	show ()
	This shows the component.

virtual void	hide ()
	This hides the component.

SbBool	isVisible ()
	Returns TRUE if this component is mapped onto the screen.

SoWidget	getWidget () const
	This returns the base widget for this component.

SbBool	isTopLevelShell () const
	Returns TRUE if this component is a top level shell component (has its own window).

SoWidget	getShellWidget () const
	Returns the shell widget (NULL if the shell hasn't been created by this component).

SoWidget	getParentWidget () const
	Returns the parent widget, be it a shell or not.

void	setSize (const SbVec2s &size)
	Convenience routine on the widget.

SbVec2s	getSize ()
	Convenience routine on the widget.

SbBool	setFullScreen (const SbBool enable)
	Switches the viewer into (or out of) fullscreen mode.

SbBool	isFullScreen (void) const
	Queries if the viewer is in fullscreen mode.

void	setFullScreenEnable (const SbBool enable)
	Enables/disables fullscreen mode.

SbBool	isFullScreenEnable () const
	Queries if it is possible to put the viewer in fullscreen mode.

Display *	getDisplay ()
	Returns the X display associated with this components widget.

SoNONUNICODE void	setTitle (const char *newTitle)
	Sets window title.

void	setTitle (const SbString &newTitle)
	Sets window title.

SbString	getTitle () const
	Gets window title.

SoNONUNICODE void	setIconTitle (const char *newIconTitle)
	Sets icon title.

void	setIconTitle (const SbString &newIconTitle)
	Sets icon title.

SbString	getIconTitle () const
	Gets icon title.

void	setWindowCloseCallback (SoXtComponentCB func, void data=NULL)
	Sets which callback to call when the user closes this component (double click in the upper left corner) - by default hide() is called on this component, unless a callback is set to something other than NULL.

SbString	getWidgetName () const
	Returns the widget name.

SbString	getClassName () const
	Returns the class name.

Additional Inherited Members
Static Public Member Functions inherited from SoXtComponent
static void	displayHelp (const char *filename, UINT contextID)
	Static method to display the specified topic of the specified help file.

static SoXtComponent *	getComponent (SoWidget w)
	This returns the SoXtComponent for this widget.

Detailed Description

Component for OpenGL rendering.

This abstract base class provides a C++ wrapper around the GLwMDraw window object. It allows OpenGL rendering to be performed within a Motif window and is used by the SoXtRenderArea. SoXtGLWidget uses a parent window with two separate GLwMDraw window objects (one for single and one for double buffering), with routines to return the appropriate windows.

Subclasses only need to redefine the redraw() routine for rendering and processEvent() routine if they are interested in receiving X events.

Member Enumeration Documentation

◆ FloatColorBufferSize

enum SoXtGLWidget::FloatColorBufferSize

FloatColorBufferSize.

Enumerator
FLOAT_16_COLOR_BUFFER	16-bit rendering per component.
FLOAT_32_COLOR_BUFFER	32-bit rendering per component.

Definition at line 108 of file SoXtGLWidget.h.

Member Function Documentation

◆ bindNormalContext()

virtual SbBool SoXtGLWidget::bindNormalContext ( )

virtual

Makes the normal rendering context the current context.

Equivalent to makeNormalCurrent() call.

◆ getAntialiasingMode()

SoSceneManager::AntialiasingMode SoXtGLWidget::getAntialiasingMode ( ) const

Returns the antialiasing mode set using the setAntialiasing(float,AntialiasingMode) method.

Returns AUTO by default. Parameters set using the setAntialiasing(SoAntialiasingParameters*) method may change the antialiasing mode, but do not affect the value returned by this method. Therefore this method does not necessarily return the current actual antialiasing mode.

◆ getAntialiasingParameters()

SoAntialiasingParameters * SoXtGLWidget::getAntialiasingParameters ( ) const

Returns the antialiasing parameters set using the setAntialiasing(SoAntialiasingParameters*) method.

Returns null by default. A quality value set using the setAntialiasing(float,AntialiasingMode) method may modify internal parameters, but does not affect the value returned by this method. Therefore this method does not necessarily return the current actual antialiasing parameters.

◆ getAntialiasingQuality()

float SoXtGLWidget::getAntialiasingQuality ( ) const

Returns the antialiasing quality set using the setAntialiasing(float,AntialiasingMode) method.

Returns 0.0 by default. Parameters set using the setAntialiasing(SoAntialiasingParameters*) method override internal parameters, but do not affect the value returned by this method. Therefore this method does not necessarily return the current actual antialiasing quality.

◆ getColorMapSize()

int SoXtGLWidget::getColorMapSize ( )

Returns the color map size.

◆ getFloatingColorBuffer()

void SoXtGLWidget::getFloatingColorBuffer	(	SbBool &	enable,
		FloatColorBufferSize &	size
	)

Returns TRUE if floating point rendering is used and its precision.

◆ getGraphicConfigTemplate()

SoGLGraphicConfigTemplate * SoXtGLWidget::getGraphicConfigTemplate ( )

Gets the current graphics configuration template.

◆ getNormalContext()

SbGlContextHelper::GLContext SoXtGLWidget::getNormalContext ( ) const

Gets the current normal context, which is needed as an argument to glXMakeCurrent() when drawing in the normal planes.

Note: This should not be cached by users because it will change as single/double buffering changes.

◆ getNormalSoContext()

SoGLContext * SoXtGLWidget::getNormalSoContext ( ) const

◆ getNormalVisual()

XVisualInfo * SoXtGLWidget::getNormalVisual ( )

Returns the visual for the normal window.

◆ getNormalWidget()

SoWidget SoXtGLWidget::getNormalWidget ( ) const

Gets the current normal widget, which is needed as an argument to glXMakeCurrent() when drawing in the normal planes.

Note: This should not be cached by users because it will change as single/double buffering changes.

◆ getNormalWindow()

virtual Window SoXtGLWidget::getNormalWindow ( )

virtual

Gets the current normal GL window, which is needed as an argument to glXMakeCurrent() when drawing in the normal planes.

Note: This should not be cached by users because it will change as single/double buffering changes.

◆ isBorder()

SbBool SoXtGLWidget::isBorder ( ) const

inline

Returns whether the border is on or off.

Definition at line 219 of file SoXtGLWidget.h.

◆ isDoubleBuffer()

SbBool SoXtGLWidget::isDoubleBuffer ( )

Returns whether double buffering is on or off.

◆ isDrawToFrontBufferEnable()

SbBool SoXtGLWidget::isDrawToFrontBufferEnable ( ) const

inline

Queries drawing to the front buffer.

Definition at line 230 of file SoXtGLWidget.h.

◆ saveSnapshot()

bool SoXtGLWidget::saveSnapshot	(	const SbString &	filename,
		bool	overwrite = `true`
	)

Save a snapshot of the current image displayed in the viewer.

The image is read back from the OpenGL framebuffer and will be the same size as the viewer's drawing window. Returns true if successful.

Notes:

Depending on the operating system and graphics hardware, it is possible that the image could be incomplete if the viewer window is overlapped by other windows.
The supported image file formats are: BMP (Windows only), JPEG, PNG and TIFF.
The image file format to write is determined by the extension of the specified filename, e.g. ".png" for PNG format.
For BMP and JPEG formats an RGB image is written.
For PNG and TIFF formats, an RGBA (RGB plus alpha channel) image is always written.
Writing an RGBA image means the image background is transparent. Actually an RGBA snapshot can not be saved without transparency. To get the displayed image without transparency, use the BMP or the JPEG format.
To generate an image with a different size or different options, use SoOffscreenRenderArea instead.
The specified filename must include a directory or nothing will be written. Can be simply "./filename.png", but just "filename.png" won't work.

Parameters

filename	Fully qualified file path for the snapshot file. The specified filename must end with one of the extensions supported by SoJPEGImageRW (jpg, jpeg, ...), SoPNGImageRW (png), SoBMPImageRW (bmp), or SoTIFFImageRW (tif, ...).
overwrite	If true, overwrite any existing file with the same name (default is true).

◆ setAntialiasing() [1/2]

void SoXtGLWidget::setAntialiasing	(	const float	quality,
		const SoSceneManager::AntialiasingMode	mode = `SoSceneManager::AUTO`
	)

Enable (or disable) antialiasing with specified quality and mode.

Specific antialiasing parameters will be set automatically based on the quality value. Note that the quality and mode settings are overridden if specific antialiasing parameters are subsequently set using the setAntialiasing(SoAntialiasingParameters*) method.

The default mode is AUTO but this may be overridden by setting the environment variable OIV_ANTIALIASING_DEFAULT_MODE (see SoPreferences).

Parameters

quality	The quality is a factor in the range [0.0,1.0]. Use the value 0.0 to turn off antialiasing. 0.5 is a typical value.
mode	The antialiasing algorithm. Default is AUTO, which means use the best for the current hardware. Use the value NO_ANTIALIASING to turn off antialiasing.

◆ setAntialiasing() [2/2]

void SoXtGLWidget::setAntialiasing ( SoAntialiasingParameters * advancedParameters )

Enable (or disable) antialiasing with specific parameters.

Use one of the subclasses of SoAntialiasingParameters. The antialiasing mode is determined by which subclass is used to set the parameters. For example, passing an SoFXAAParameters object automatically sets FXAA mode. Note that the parameters are overridden if a quality and mode are subsequently set using the setAntialiasing(float,AntialiasingMode) method.

NOTES

When the antialiasing parameters are modified a listener is called if it has been defined. See also setAntialiasingEventListener().
The caller is responsible for allocation and destruction of the advancedParameters object. SoSceneManager makes a copy of the parameter values, so the object can be destroyed after calling this method.

Parameters

advancedParameters Provides specific parameters for an antialiasing mode.
Use a null parameter to turn off antialiasing or use one of the subclasses of SoAntialiasingParameters.

◆ setBorder()

void SoXtGLWidget::setBorder ( SbBool onOrOff )

Shows/hides a border of thickness 3 around the glX widgets.

This if OFF by default, but turned on by the render area.

◆ setDoubleBuffer()

virtual void SoXtGLWidget::setDoubleBuffer ( SbBool onOrOff )

virtual

Routine that dynamically changes between single and double buffering.

Default is double buffer off. (The SoXtRenderArea subclass makes it double buffer by default.)

◆ setDrawToFrontBufferEnable()

void SoXtGLWidget::setDrawToFrontBufferEnable ( SbBool enableFlag )

Sets drawing to the front buffer.

Controls drawing to the front buffer when an obscured portion of the window is exposed. Default: TRUE.

◆ setFloatingColorBuffer()

void SoXtGLWidget::setFloatingColorBuffer	(	SbBool	enable,
		FloatColorBufferSize	size = `FLOAT_16_COLOR_BUFFER`
	)

Enables/disables floating point rendering using 16- or 32-bit components.

If TRUE, Open Inventor will automatically render to an offscreen floating point buffer, and copy the resulting image to the screen.

To determine if floating point rendering was successfully enabled, use getFloatingColorBuffer, below.

Using floating point rendering can improve image quality, particularly when many objects are being blended, for example, in volume rendering. This is a convenience method as you could accomplish the same results setting up a graphic template.

◆ setGraphicConfigTemplate()

void SoXtGLWidget::setGraphicConfigTemplate ( SoGLGraphicConfigTemplate * gTemplate )

Sets a new graphics configuration template.

◆ setNormalVisual()

virtual void SoXtGLWidget::setNormalVisual ( XVisualInfo * vis )

virtual

Specify exactly what the visual should be for the normal window.

This allows the user to create all possible visuals supported by OpenGL. The XVisualInfo structure should be a valid OpenGL visual returned by glXChooseVisual (). This structure will be copied by the SoXtGLWidget; the application is responsible for freeing the visual info with XFree () when done. (The methods for setting the visual are virtual so that derived classes can know when the visual is changing.)

◆ swapNormalBuffers()

virtual SbBool SoXtGLWidget::swapNormalBuffers ( )

virtual

Swaps the normal front and back buffers.

Equivalent to calling glXSwapBuffers( getDisplay(), getNormalWindow() );

◆ unbindNormalContext()

virtual SbBool SoXtGLWidget::unbindNormalContext ( )

virtual

unbind the current context (previously bind with bindNormalContext );

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

Inventor/Xt/SoXtGLWidget.h

Open Inventor Release 2023.2.3

Public Types

Public Member Functions

Additional Inherited Members

Detailed Description

SEE ALSO

Member Enumeration Documentation

◆ FloatColorBufferSize

Member Function Documentation

◆ bindNormalContext()

◆ getAntialiasingMode()

◆ getAntialiasingParameters()

◆ getAntialiasingQuality()

◆ getColorMapSize()

◆ getFloatingColorBuffer()

◆ getGraphicConfigTemplate()

◆ getNormalContext()

◆ getNormalSoContext()

◆ getNormalVisual()

◆ getNormalWidget()

◆ getNormalWindow()

◆ isBorder()

◆ isDoubleBuffer()

◆ isDrawToFrontBufferEnable()

◆ saveSnapshot()

◆ setAntialiasing() [1/2]

◆ setAntialiasing() [2/2]

NOTES

◆ setBorder()

◆ setDoubleBuffer()

◆ setDrawToFrontBufferEnable()

◆ setFloatingColorBuffer()

◆ setGraphicConfigTemplate()

◆ setNormalVisual()

◆ swapNormalBuffers()

◆ unbindNormalContext()