Coin  4.0.3
Coin3D core library
Loading...
Searching...
No Matches
SoFont Class Reference

The SoFont class is an appearance node for setting fonts. More...

#include <Inventor/nodes/SoFont.h>

Inheritance diagram for SoFont:
SoNode SoFieldContainer SoBase SoFontStyle

Public Member Functions

 SoFont (void)
 
virtual void callback (SoCallbackAction *action)
 
virtual void doAction (SoAction *action)
 
virtual void getBoundingBox (SoGetBoundingBoxAction *action)
 
virtual void getPrimitiveCount (SoGetPrimitiveCountAction *action)
 
virtual SoType getTypeId (void) const
 
virtual void GLRender (SoGLRenderAction *action)
 
virtual void pick (SoPickAction *action)
 
- Public Member Functions inherited from SoNode
virtual SoNodeaddToCopyDict (void) const
 
virtual SbBool affectsState (void) const
 
virtual void audioRender (SoAudioRenderAction *action)
 
virtual SoNodecopy (SbBool copyconnections=FALSE) const
 
virtual void copyContents (const SoFieldContainer *from, SbBool copyconnections)
 
virtual SoFieldContainercopyThroughConnection (void) const
 
virtual SoChildListgetChildren (void) const
 
virtual void getMatrix (SoGetMatrixAction *action)
 
SbUniqueId getNodeId (void) const
 
NodeType getNodeType (void) const
 
virtual void GLRenderBelowPath (SoGLRenderAction *action)
 
virtual void GLRenderInPath (SoGLRenderAction *action)
 
virtual void GLRenderOffPath (SoGLRenderAction *action)
 
virtual void grabEventsCleanup (void)
 
virtual void grabEventsSetup (void)
 
virtual void handleEvent (SoHandleEventAction *action)
 
SbBool isOverride (void) const
 
virtual void notify (SoNotList *l)
 
virtual void rayPick (SoRayPickAction *action)
 
virtual void search (SoSearchAction *action)
 
void setNodeType (const NodeType type)
 
void setOverride (const SbBool state)
 
virtual void startNotify (void)
 
virtual void write (SoWriteAction *action)
 
virtual void writeInstance (SoOutput *out)
 
- Public Member Functions inherited from SoFieldContainer
virtual void addWriteReference (SoOutput *out, SbBool isfromfield=FALSE)
 
void copyFieldValues (const SoFieldContainer *container, SbBool copyconnections=FALSE)
 
SbBool enableNotify (const SbBool flag)
 
SbBool fieldsAreEqual (const SoFieldContainer *container) const
 
void get (SbString &fielddata)
 
void get (SbString &fielddata, SoOutput *out)
 
virtual int getAllFields (SoFieldList &l) const
 
virtual SoFieldgetEventIn (const SbName &name) const
 
virtual SoFieldgetEventOut (const SbName &name) const
 
virtual SoFieldgetField (const SbName &name) const
 
SbBool getFieldName (const SoField *const field, SbName &name) const
 
virtual int getFields (SoFieldList &l) const
 
virtual void getFieldsMemorySize (size_t &managed, size_t &unmanaged) const
 
SbBool getIsBuiltIn (void) const
 
voidgetUserData (void) const
 
SbBool hasDefaultValues (void) const
 
SbBool isNotifyEnabled (void) const
 
SbBool set (const char *const fielddata)
 
SbBool set (const char *fielddata, SoInput *input)
 
void setToDefaults (void)
 
void setUserData (void *userdata) const
 
virtual SbBool validateNewFieldValue (SoField *field, void *newval)
 
- Public Member Functions inherited from SoBase
void addAuditor (void *const auditor, const SoNotRec::Type type)
 
void assertAlive (void) const
 
const SoAuditorListgetAuditors (void) const
 
virtual SbName getName (void) const
 
int32_t getRefCount (void) const
 
SbBool isOfType (SoType type) const
 Returns TRUE if the type of this object is either of the same type or inherited from type.
 
void ref (void) const
 
void removeAuditor (void *const auditor, const SoNotRec::Type type)
 
virtual void setName (const SbName &newname)
 
SbBool shouldWrite (void)
 
void touch (void)
 
void unref (void) const
 
void unrefNoDelete (void) const
 

Static Public Member Functions

static SoType getClassTypeId (void)
 
static void initClass (void)
 Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system.
 
- Static Public Member Functions inherited from SoNode
static void audioRenderS (SoAction *action, SoNode *node)
 
static void callbackS (SoAction *action, SoNode *node)
 
static int getActionMethodIndex (const SoType type)
 
static void getBoundingBoxS (SoAction *action, SoNode *node)
 
static SoNodegetByName (const SbName &name)
 
static int getByName (const SbName &name, SoNodeList &l)
 
static SoType getClassTypeId (void)
 
static uint32_t getCompatibilityTypes (const SoType &nodetype)
 
static void getMatrixS (SoAction *action, SoNode *node)
 
static SbUniqueId getNextNodeId (void)
 
static void getPrimitiveCountS (SoAction *action, SoNode *node)
 
static void GLRenderS (SoAction *action, SoNode *node)
 
static void handleEventS (SoAction *action, SoNode *node)
 
static void initClass (void)
 Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system.
 
static void initClasses (void)
 
static void pickS (SoAction *action, SoNode *node)
 
static void rayPickS (SoAction *action, SoNode *node)
 
static void searchS (SoAction *action, SoNode *node)
 
static void writeS (SoAction *action, SoNode *node)
 
- Static Public Member Functions inherited from SoFieldContainer
static void addCopy (const SoFieldContainer *orig, const SoFieldContainer *copy)
 
static SoFieldContainercheckCopy (const SoFieldContainer *orig)
 
static void cleanupClass (void)
 
static void copyDone (void)
 
static SoFieldContainerfindCopy (const SoFieldContainer *orig, const SbBool copyconnections)
 
static SoType getClassTypeId (void)
 This static method returns the SoType object associated with objects of this class.
 
static void initClass (void)
 Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system.
 
static void initCopyDict (void)
 
- Static Public Member Functions inherited from SoBase
static void addName (SoBase *const base, const char *const name)
 
static SbBool connectRoute (SoInput *input, const SbName &fromnodename, const SbName &fromfieldname, const SbName &tonodename, const SbName &tofieldname)
 
static void decrementCurrentWriteCounter (void)
 
static SoType getClassTypeId (void)
 This static method returns the SoType object associated with objects of this class.
 
static SoBasegetNamedBase (const SbName &name, SoType type)
 
static int getNamedBases (const SbName &name, SoBaseList &baselist, SoType type)
 
static SbBool getTraceRefs (void)
 
static void incrementCurrentWriteCounter (void)
 
static void initClass (void)
 Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system.
 
static SbBool read (SoInput *input, SoBase *&base, SoType expectedtype)
 
static SbBool readRoute (SoInput *input)
 
static void removeName (SoBase *const base, const char *const name)
 
static void setInstancePrefix (const SbString &c)
 
static void setTraceRefs (SbBool trace)
 

Public Attributes

SoSFName name
 
SoSFFloat size
 

Protected Member Functions

virtual ~SoFont ()
 
virtual const SoFieldDatagetFieldData (void) const
 
- Protected Member Functions inherited from SoNode
 SoNode (void)
 
virtual ~SoNode ()
 
virtual SbBool readInstance (SoInput *in, unsigned short flags)
 
- Protected Member Functions inherited from SoFieldContainer
 SoFieldContainer (void)
 
virtual ~SoFieldContainer ()
 
- Protected Member Functions inherited from SoBase
 SoBase (void)
 
virtual ~SoBase ()
 
virtual SoNotRec createNotRec (void)
 
virtual void destroy (void)
 
virtual const char * getFileFormatName (void) const
 
SbBool hasMultipleWriteRefs (void) const
 
void writeFooter (SoOutput *out) const
 
SbBool writeHeader (SoOutput *out, SbBool isgroup, SbBool isengine) const
 

Static Protected Member Functions

static const SoFieldData ** getFieldDataPtr (void)
 
- Static Protected Member Functions inherited from SoNode
static const SoFieldData ** getFieldDataPtr (void)
 
static int getNextActionMethodIndex (void)
 
static void incNextActionMethodIndex (void)
 
static void setCompatibilityTypes (const SoType &nodetype, const uint32_t bitmask)
 
static void setNextActionMethodIndex (int index)
 
- Static Protected Member Functions inherited from SoBase
static uint32_t getCurrentWriteCounter (void)
 
static void staticDataLock (void)
 
static void staticDataUnlock (void)
 

Additional Inherited Members

- Public Types inherited from SoNode
enum  NodeType {
  INVENTOR = 0x0000 , VRML1 = 0x0001 , VRML2 = 0x0002 , INVENTOR_1 = 0x0004 ,
  INVENTOR_2_0 = 0x0008 , INVENTOR_2_1 = 0x0010 , INVENTOR_2_5 = 0x0020 , INVENTOR_2_6 = 0x0040 ,
  COIN_1_0 = 0x0080 , COIN_2_0 = 0x0100 , EXTENSION = 0x0200 , COIN_2_2 = 0x0400 ,
  COIN_2_3 = 0x0800 , COIN_2_4 = 0x1000 , INVENTOR_5_0 = 0x2000 , COIN_2_5 = 0x4000 ,
  COIN_3_0 = 0x8000 , INVENTOR_6_0 = 0x10000 , COIN_4_0 = 0x20000
}
 
- Protected Types inherited from SoBase
enum  BaseFlags { IS_ENGINE = 0x01 , IS_GROUP = 0x02 }
 
- Protected Attributes inherited from SoNode
SbUniqueId uniqueId
 
- Protected Attributes inherited from SoFieldContainer
SbBool isBuiltIn
 
- Static Protected Attributes inherited from SoNode
static int nextActionMethodIndex = 0
 
static SbUniqueId nextUniqueId = 1
 

Detailed Description

The SoFont class is an appearance node for setting fonts.

Successive text rendering nodes (like SoText2, SoText3, SoAsciiText, etc) will use the font specified from an SoFont node when visualizing text.

The font name is recognized with the form "family:style". The range of supported font families depends on which fonts are installed on the system. A typical font family might be "Arial" or "Times New Roman".

Style is either "Bold", "Italic" or "Bold Italic".

Spaces before or after the ":" will be ignored.

If a good match for the chosen font cannot be found, the default font will be loaded instead. The default 2D font is a built-in 8x12 points font. The 3D font is a serif font ala Times New Roman. It is not possible to apply styles to any of the built-in fonts. It is not possible to specify a size for the default 2D font.

One can explicitly select the default font by setting "defaultFont" as the font name, or by just leaving the SoFont::name field alone, as it has that value by default. In that regard, note that SoFont does not inherit / accumulate any parts from earlier SoFont-nodes, even when one or both of its fields are left blank in e.g. an iv-file, like this:

#Inventor V2.1 ascii

Font { name "Helvetica"  size 50 }
Text2 { string "hepp" }

Translation { translation 5 80 0 }

BaseColor { rgb 1 1 0 }

Font { size 30 }
Text2 { string "svupp" }

(The second string in the above example will be rendered with the default built-in font, not in Helvetica.)

The default fonts are always accessible by Coin as they are embedded into the runtime library. If one needs to guarantee that the text will have the same appearance under all circumstances, the default font will be a safe choice. Another solution might be to use the FreeType font engine and explicitly name a font-file. This is described in more detail below.

Here is a simple example on how to print a string using a bold and italic Arial font:

#Inventor V2.1 ascii

Separator {
   Font {
     name "Arial:Bold Italic"
     size 14
   }
   Text2 {
     string ["This is a", "Coin font test"]
     justification CENTER
   }    
}

Coin has support for two different font APIs. On non-Windows platforms, the FreeType library together with the optional Fontconfig library is used.

If the Fontconfig library is installed the font file on the system for a given font name will be located through it. For more information on Fontconfig see http://freedesktop.org/software/fontconfig . Additionally Fontconfig allows to match specific fonts through its own pattern matching format (see http://pdx.freedesktop.org/~fontconfig/fontconfig-user.html). Please note that the point size value in the textual representation of the Fontconfig pattern is currently overridden by the size field of the SoFont node and if no size field is specified the default value of the size field is in effect. In case you intend to use your application on systems where the Fontconfig library is expected to be not installed you should not make use of Fontconfig's font pattern syntax. Fontconfig usage can be prevented by setting the "COIN_FORCE_FONTCONFIG_OFF" environment variable to 1.

Here is an example on how to print a string using the Fontconfig pattern matching syntax using a bold & italic font where Times New Roman is the preferred font family.

#Inventor V2.1 ascii

Separator {
   Font {
     name "Times New Roman,Arial,Helvetica:italic:bold"
     size 24
   }
   Text2 {
     string ["This is a", "Coin font test"]
     justification CENTER
   }    
}

On Windows the Win32 GDI library is used. FreeType and Fontconfig are dynamically loaded on demand by Coin if font support is requested by a node. When font support is loaded on Windows, FreeType will have precedence over Win32 if located. This can be prevented by setting the "COIN_FORCE_FREETYPE_OFF" environment variable to 1. When using FreeType, you need FreeType version 2.1 or later. On Mac OS X, version 2.1.7 or later is required.

If Coin cannot load the FreeType library, and is not running on Microsoft Windows, only the default fonts will be accessible.

It is possible to specify the TrueType font file directly if FreeType is used as the font engine. This is done by including the ".ttf" in the filename, i.e. "Comic_Sans_MS.ttf". Coin will then search the local path for the running program and then the path specified by the "COIN_FONT_PATH" environment variable. If the program is using FreeType on a Windows platform, the "$WINDIR/Fonts" directory will also be searched.

It is not possible to directly specify a TrueType font file if Windows is handling the fonts. This is due to the way Windows is accessing the fonts through the system registry. All fonts must therefore be properly installed and given a system name. Open the "Control Panel" and double click on the "Fonts" icon for an overview of installed fonts and their names.

Beware that some non-English versions of Windows are using different name for the styles (i.e. "Italique" instead of "Italic"). These names are supported in Coin, but it is recommended for portability purposes to only use the English terms. Please note that there is still a possibility that there are no fonts installed using the terms "Bold" or "Italic" on the Windows platform. To guarantee that a font is accessible you must either use the FreeType library and include a TrueType font in your distribution, or you must avoid using styles and stick to the standard Windows fonts.

If the "COIN_DEBUG_FONTSUPPORT" environment variable is set to 1, an extensive amount of information about loading, initializing and using fonts will be output. Issues like missing fonts and other related problems will then be reported, so we advice you to first try to use that debugging option when something does not work quite as expected.

FILE FORMAT/DEFAULTS:

name "defaultFont"
size 10
}
The SbList class is a template container class for lists.
Definition SbList.h:70
SoSFName name
Definition SoFont.h:49
SoSFFloat size
Definition SoFont.h:50
See also
SoFontStyle, SoText2, SoText3, SoAsciiText

Constructor & Destructor Documentation

◆ SoFont()

SoFont::SoFont ( void )

Constructor.

◆ ~SoFont()

SoFont::~SoFont ( )
protectedvirtual

Destructor.

Member Function Documentation

◆ callback()

void SoFont::callback ( SoCallbackAction * action)
virtual

Action method for SoCallbackAction.

Simply updates the state according to how the node behaves for the render action, so the application programmer can use the SoCallbackAction for extracting information about the scene graph.

Reimplemented from SoNode.

Reimplemented in SoFontStyle.

◆ doAction()

void SoFont::doAction ( SoAction * action)
virtual

This function performs the typical operation of a node for any action.

Reimplemented from SoNode.

Reimplemented in SoFontStyle.

◆ getBoundingBox()

void SoFont::getBoundingBox ( SoGetBoundingBoxAction * action)
virtual

Action method for the SoGetBoundingBoxAction.

Calculates bounding box and center coordinates for node and modifies the values of the action to encompass the bounding box for this node and to shift the center point for the scene more towards the one for this node.

Nodes influencing how geometry nodes calculate their bounding box also override this method to change the relevant state variables.

Reimplemented from SoNode.

Reimplemented in SoFontStyle.

◆ getClassTypeId()

SoType SoFont::getClassTypeId ( void )
static

This static method returns the SoType object associated with objects of this class.

◆ getFieldData()

const SoFieldData * SoFont::getFieldData ( void ) const
protectedvirtual

Returns a pointer to the class-wide field data storage object for this instance. If no fields are present, returns NULL.

Reimplemented from SoFieldContainer.

Reimplemented in SoFontStyle.

◆ getFieldDataPtr()

const SoFieldData ** SoFont::getFieldDataPtr ( void )
staticprotected

This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

Returns the SoFieldData class which holds information about fields in this node.

◆ getPrimitiveCount()

void SoFont::getPrimitiveCount ( SoGetPrimitiveCountAction * action)
virtual

Action method for the SoGetPrimitiveCountAction.

Calculates the number of triangle, line segment and point primitives for the node and adds these to the counters of the action.

Nodes influencing how geometry nodes calculate their primitive count also override this method to change the relevant state variables.

Reimplemented from SoNode.

Reimplemented in SoFontStyle.

◆ getTypeId()

SoType SoFont::getTypeId ( void ) const
virtual

Returns the type identification of an object derived from a class inheriting SoBase. This is used for runtime type checking and "downward" casting.

Implements SoBase.

Reimplemented in SoFontStyle.

◆ GLRender()

void SoFont::GLRender ( SoGLRenderAction * action)
virtual

Action method for the SoGLRenderAction.

This is called during rendering traversals. Nodes influencing the rendering state in any way or want to throw geometry primitives at OpenGL override this method.

Reimplemented from SoNode.

Reimplemented in SoFontStyle.

◆ pick()

void SoFont::pick ( SoPickAction * action)
virtual

Action method for SoPickAction.

Does common processing for SoPickAction action instances.

Reimplemented from SoNode.

Reimplemented in SoFontStyle.

Member Data Documentation

◆ name

SoSFName SoFont::name

Name of font.

Which font names are available is rather system dependent, not only on whether or not you are running on a UNIX/Linux system, Microsoft Windows or whatever, but also on which fonts and font types (like TrueType) are installed on a particular user's system.

All font rendering nodes have a built-in fallback font to use, though, so even though Coin cannot find a font on the system of the specified type, the text should be rendered somehow.

In summation, consider this node type and this particular field as a hint to the font rendering engines of Coin, and do not base your models on a particular font being available.

◆ size

SoSFFloat SoFont::size

Size of font. Defaults to 10.0.

For 2D rendered bitmap fonts (like for SoText2), this value is the height of a character in screen pixels. For 3D text, this value is the world space coordinates height of a character in the current units setting (see documentation for SoUnits node).


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