Component for OpenGL rendering. More...

#include <Inventor/Win/SoWinGLWidget.h>

Inheritance diagram for SoWinGLWidget:

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 Types inherited from SoWinComponent
typedef void	SoWinComponentCB(void userData, SoWinComponent comp)

Public Member Functions
virtual Window	getNormalWindow ()
	Gets the normal GL window, which is needed as an argument to SbGlContextHelper::makeCurrent() when drawing in the normal planes.

GLXContext	getNormalContext ()
	Gets the normal context, which is needed as an argument to SbGlContextHelper::makeCurrent() when drawing in the normal planes.

virtual SoGLContext *	getNormalSoContext ()

Hdc	getNormalDC () const
	Returns the device context (which is needed for SbGlContextHelper::makeCurrent).

void	setStealFocus (SbBool onOrOff)
	By default the GLWidget "steals" focus whenever the cursor moves over it.

SoWidget	getNormalWidget () const
	Gets the normal window handle, which is needed as an argument to SbGlContextHelper::makeCurrent() when drawing in the normal planes.

virtual void	setNormalVisual (XVisualInfo *vis)
	Specifies the exact pixel format descriptor for the normal window.

XVisualInfo *	getNormalVisual ()
	Returns the pixel format descriptor for the normal window.

virtual void	setPixelFormat (int format)
	Sets the current pixel format.

int	getPixelFormat ()
	Returns the current pixel format.

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

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

void	setBorder (SbBool onOrOff)
	Included for portability only.

int	getBorderSize ()
	Included for portability only.

SbBool	isBorder () const
	Included for portability only.

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

SbBool	isDrawToFrontBufferEnable () const
	Returns whether drawing to the front buffer is enabled.

void	setCursor (Cursor newCursor)
	Sets the current cursor.

Cursor	getCursor ()
	Returns the current cursor.

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.

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

virtual 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 SoWinComponent
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 window handle 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 window handle (NULL if the shell hasn't been created by this component).

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

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

SbVec2s	getSize ()
	Convenience routine on the window handle.

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

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

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

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

UINT *	getDisplay ()
	Included for portability only.

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)
	Included for portability only.

void	setIconTitle (const SbString &newIconTitle)
	Included for portability only.

SbString	getIconTitle () const
	Included for portability only.

void	setWindowCloseCallback (SoWinComponentCB 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 specified.

SbString	getWidgetName () const
	Returns the window handle name.

SbString	getClassName () const
	Returns the class name.

virtual	~SoWinComponent ()
	Destructor.

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

static SoDEPRECATED void	displayHelp (const SbString &filename, UINT contextID)
	Static method to display the specified topic of the specified help file.

static SoWinComponent *	getComponent (SoWidget w)
	Returns the SoWinComponent for this window handle.

Public Attributes inherited from SoWinComponent
SbString	helpFileName
	Name of help file to open when the viewer Help button is pressed.

UINT	helpContextID
	The context ID of the help topic to open when the viewer Help button is pressed.

SbString	helpContextString
	The TopicID of the help topic to open when the viewer Help button is pressed.

Detailed Description

Component for OpenGL rendering.

This abstract base class provides a C++ wrapper around an OpenGL drawing window. It allows OpenGL rendering to be performed within a Windows window and is used by the SoWinRenderArea. SoWinGLWidget uses a parent window with two separate OpenGL windows (one for single buffering 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 Windows messages.

Member Enumeration Documentation

◆ FloatColorBufferSize

enum SoWinGLWidget::FloatColorBufferSize

FloatColorBufferSize.

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

Definition at line 84 of file SoWinGLWidget.h.

Member Function Documentation

◆ bindNormalContext()

virtual SbBool SoWinGLWidget::bindNormalContext ( )

virtual

Makes the normal rendering context the current context.

Equivalent to makeNormalCurrent() call.

◆ getAntialiasingMode()

SoSceneManager::AntialiasingMode SoWinGLWidget::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 * SoWinGLWidget::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 SoWinGLWidget::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.

◆ getBorderSize()

int SoWinGLWidget::getBorderSize ( )

inline

Included for portability only.

Definition at line 228 of file SoWinGLWidget.h.

◆ getCursor()

Cursor SoWinGLWidget::getCursor ( )

Returns the current cursor.

◆ getFloatingColorBuffer()

virtual void SoWinGLWidget::getFloatingColorBuffer	(	SbBool &	enable,
		FloatColorBufferSize &	size
	)

virtual

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

Reimplemented in SoWinRenderArea.

◆ getGraphicConfigTemplate()

SoGLGraphicConfigTemplate * SoWinGLWidget::getGraphicConfigTemplate ( )

Gets the current graphics configuration template.

◆ getNormalContext()

GLXContext SoWinGLWidget::getNormalContext ( )

inline

Gets the normal context, which is needed as an argument to SbGlContextHelper::makeCurrent() when drawing in the normal planes.

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

Definition at line 114 of file SoWinGLWidget.h.

◆ getNormalDC()

Hdc SoWinGLWidget::getNormalDC ( ) const

Returns the device context (which is needed for SbGlContextHelper::makeCurrent).

◆ getNormalSoContext()

virtual SoGLContext * SoWinGLWidget::getNormalSoContext ( )

inlinevirtual

Definition at line 116 of file SoWinGLWidget.h.

◆ getNormalVisual()

XVisualInfo * SoWinGLWidget::getNormalVisual ( )

Returns the pixel format descriptor for the normal window.

◆ getNormalWidget()

SoWidget SoWinGLWidget::getNormalWidget ( ) const

Gets the normal window handle, which is needed as an argument to SbGlContextHelper::makeCurrent() 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 SoWinGLWidget::getNormalWindow ( )

virtual

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

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

◆ getPixelFormat()

int SoWinGLWidget::getPixelFormat ( )

Returns the current pixel format.

This method allow an application to query a pixel format that has extended attributes that can't be specified in a PFD struct.

◆ isBorder()

SbBool SoWinGLWidget::isBorder ( ) const

inline

Included for portability only.

Definition at line 233 of file SoWinGLWidget.h.

◆ isDoubleBuffer()

SbBool SoWinGLWidget::isDoubleBuffer ( )

inline

Returns whether double buffering is on or off.

Definition at line 218 of file SoWinGLWidget.h.

◆ isDrawToFrontBufferEnable()

SbBool SoWinGLWidget::isDrawToFrontBufferEnable ( ) const

inline

Returns whether drawing to the front buffer is enabled.

Definition at line 244 of file SoWinGLWidget.h.

◆ saveSnapshot()

bool SoWinGLWidget::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 SoWinGLWidget::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 SoWinGLWidget::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 SoWinGLWidget::setBorder ( SbBool onOrOff )

Included for portability only.

◆ setCursor()

void SoWinGLWidget::setCursor ( Cursor newCursor )

Sets the current cursor.

If you are using a viewer class, the viewer will automatically change the cursor depending on the viewer mode. These changes will override the cursor set with this method unless you also call SoWinViewer::setCursorEnabled(FALSE).

◆ setDoubleBuffer()

void SoWinGLWidget::setDoubleBuffer ( SbBool onOrOff )

Routine that dynamically changes between single and double buffering.

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

◆ setDrawToFrontBufferEnable()

void SoWinGLWidget::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: FALSE.

◆ setFloatingColorBuffer()

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

virtual

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.

Reimplemented in SoWinRenderArea.

◆ setGraphicConfigTemplate()

void SoWinGLWidget::setGraphicConfigTemplate ( SoGLGraphicConfigTemplate * gTemplate )

Sets a new graphics configuration template.

◆ setNormalVisual()

virtual void SoWinGLWidget::setNormalVisual ( XVisualInfo * vis )

virtual

Specifies the exact pixel format descriptor for the normal window.

This allows the user to create all possible pixel format descriptors supported by OpenGL. The PIXELFORMATDESCRIPTOR structure should be a valid OpenGL pixel format descriptor returned by ChoosePixelFormat(). (The methods for setting the pixel format descriptor are virtual so that derived classes can know when the pixel format descriptor is changing.)

Reimplemented in SoWinViewer.

◆ setPixelFormat()

virtual void SoWinGLWidget::setPixelFormat ( int format )

virtual

Sets the current pixel format.

This method allows an application to set a pixel format that has extended attributes that can't be specified in a PFD struct. The specified format must support OpenGL and drawing to a window.

You can also use environment variable OIV_FORCE_PIXEL_FORMAT to request a pixel format.

Note: OIV_FORCE_PIXEL_FORMAT can also be used to set special convenience values (-1, -2, etc.) used for troubleshooting. However, these values are not actually valid pixel formats and are not supported by setPixelFormat.

◆ setStealFocus()

void SoWinGLWidget::setStealFocus ( SbBool onOrOff )

inline

By default the GLWidget "steals" focus whenever the cursor moves over it.

This roughly simulates the UNIX/X "focusFollowsCursor" behavior (which has no equivalent in Win32) and allows the Ctrl and Shift keys to be detected for 1-button mouse behaviors. Sometimes you want to this off however, like when you're typing in the zoom field.

Definition at line 135 of file SoWinGLWidget.h.

◆ swapNormalBuffers()

virtual SbBool SoWinGLWidget::swapNormalBuffers ( )

virtual

Swaps the normal front and back buffers.

◆ unbindNormalContext()

virtual SbBool SoWinGLWidget::unbindNormalContext ( )

virtual

unbind the current context (previously bind with bindNormalContext );

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

Inventor/Win/SoWinGLWidget.h

Open Inventor Release 2024.1.3

Public Types

Public Member Functions

Additional Inherited Members

Detailed Description

SEE ALSO

Member Enumeration Documentation

◆ FloatColorBufferSize

Member Function Documentation

◆ bindNormalContext()

◆ getAntialiasingMode()

◆ getAntialiasingParameters()

◆ getAntialiasingQuality()

◆ getBorderSize()

◆ getCursor()

◆ getFloatingColorBuffer()

◆ getGraphicConfigTemplate()

◆ getNormalContext()

◆ getNormalDC()

◆ getNormalSoContext()

◆ getNormalVisual()

◆ getNormalWidget()

◆ getNormalWindow()

◆ getPixelFormat()

◆ isBorder()

◆ isDoubleBuffer()

◆ isDrawToFrontBufferEnable()

◆ saveSnapshot()

◆ setAntialiasing() [1/2]

◆ setAntialiasing() [2/2]

NOTES

◆ setBorder()

◆ setCursor()

◆ setDoubleBuffer()

◆ setDrawToFrontBufferEnable()

◆ setFloatingColorBuffer()

◆ setGraphicConfigTemplate()

◆ setNormalVisual()

◆ setPixelFormat()

◆ setStealFocus()

◆ swapNormalBuffers()

◆ unbindNormalContext()