Open Inventor Release 2024.1.1
 
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SoXtGLWidget Class Referenceabstract

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 Types inherited from SoXtComponent
typedef void SoXtComponentCB(void *data, SoXtComponent *v)
 

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.
 
SoGLContextgetNormalSoContext () 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.
 
SoAntialiasingParametersgetAntialiasingParameters () 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.
 
SoGLGraphicConfigTemplategetGraphicConfigTemplate ()
 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 SoXtComponentgetComponent (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.

SEE ALSO

SoXtComponent, SoXtRenderArea

Definition at line 102 of file SoXtGLWidget.h.

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
filenameFully 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, ...).
overwriteIf 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
qualityThe 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.
modeThe 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
    advancedParametersProvides 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: