Subclass of vtkFreeTypeTools that uses system installed fonts. More...

#include <vtkFontConfigFreeTypeTools.h>

Inheritance diagram for vtkFontConfigFreeTypeTools:

Collaboration diagram for vtkFontConfigFreeTypeTools:

Public Types
typedef vtkFreeTypeTools	Superclass

Public Types inherited from vtkFreeTypeTools
typedef vtkObject	Superclass

Public Member Functions
virtual vtkTypeBool	IsA (const char *type)
	Return 1 if this class is the same type of (or a subclass of) the named class. More...

vtkFontConfigFreeTypeTools *	NewInstance () const

void	PrintSelf (ostream &os, vtkIndent indent) override
	Methods invoked by print to print information about the object including superclasses. More...

Public Member Functions inherited from vtkFreeTypeTools
vtkFreeTypeTools *	NewInstance () const

virtual void	SetDebugTextures (bool)
	If true, images produced by RenderString will have a transparent grey background and set the justification anchor texel to bright yellow. More...

virtual bool	GetDebugTextures ()

virtual void	DebugTexturesOn ()

virtual void	DebugTexturesOff ()

FT_Library *	GetLibrary ()
	Get the FreeType library singleton. More...

FaceMetrics	GetFaceMetrics (vtkTextProperty *tprop)
	Return some metrics about a font face. More...

GlyphOutline	GetUnscaledGlyphOutline (vtkTextProperty *tprop, vtkUnicodeStringValueType charId)
	Return a generic outline of a glyph with some additional metadata. More...

std::array< int, 2 >	GetUnscaledKerning (vtkTextProperty *tprop, vtkUnicodeStringValueType leftChar, vtkUnicodeStringValueType rightChar)
	Return a 2D vector detailing the unscaled kerning offset for a pair of characters. More...

virtual void	SetMaximumNumberOfFaces (unsigned int)
	Set/Get the maximum number of faces (FT_Face), sizes (FT_Size) and bytes used by the cache. More...

virtual unsigned int	GetMaximumNumberOfFaces ()

virtual void	SetMaximumNumberOfSizes (unsigned int)

virtual unsigned int	GetMaximumNumberOfSizes ()

virtual void	SetMaximumNumberOfBytes (unsigned long)

virtual unsigned long	GetMaximumNumberOfBytes ()

bool	GetBoundingBox (vtkTextProperty *tprop, const vtkStdString &str, int dpi, int bbox[4])
	Given a text property and a string, get the bounding box {xmin, xmax, ymin, ymax} of the rendered string in pixels. More...

bool	GetBoundingBox (vtkTextProperty *tprop, const vtkUnicodeString &str, int dpi, int bbox[4])

bool	GetMetrics (vtkTextProperty *tprop, const vtkStdString &str, int dpi, vtkTextRenderer::Metrics &metrics)
	Given a text property and a string, get the metrics of the rendered string. More...

bool	GetMetrics (vtkTextProperty *tprop, const vtkUnicodeString &str, int dpi, vtkTextRenderer::Metrics &metrics)

bool	RenderString (vtkTextProperty tprop, const vtkStdString &str, int dpi, vtkImageData data, int textDims[2]=nullptr)
	Given a text property and a string, this function initializes the vtkImageData *data and renders it in a vtkImageData. More...

bool	RenderString (vtkTextProperty tprop, const vtkUnicodeString &str, int dpi, vtkImageData data, int textDims[2]=nullptr)

bool	StringToPath (vtkTextProperty tprop, const vtkStdString &str, int dpi, vtkPath path)
	Given a text property and a string, this function populates the vtkPath path with the outline of the rendered string. More...

bool	StringToPath (vtkTextProperty tprop, const vtkUnicodeString &str, int dpi, vtkPath path)

int	GetConstrainedFontSize (const vtkStdString &str, vtkTextProperty *tprop, int dpi, int targetWidth, int targetHeight)
	This function returns the font size (in points) required to fit the string in the target rectangle. More...

int	GetConstrainedFontSize (const vtkUnicodeString &str, vtkTextProperty *tprop, int dpi, int targetWidth, int targetHeight)

void	MapTextPropertyToId (vtkTextProperty tprop, size_t tprop_cache_id)
	Given a text property 'tprop', get its unique ID in our cache framework. More...

void	MapIdToTextProperty (size_t tprop_cache_id, vtkTextProperty *tprop)

virtual void	SetScaleToPowerTwo (bool)
	Set whether the image produced should be scaled up to the nearest power of. More...

virtual bool	GetScaleToPowerTwo ()

virtual void	ScaleToPowerTwoOn ()

virtual void	ScaleToPowerTwoOff ()

virtual void	SetForceCompiledFonts (bool)
	Force use of the fonts compiled into VTK, ignoring any FontConfig or embedded fonts. More...

virtual bool	GetForceCompiledFonts ()

virtual void	ForceCompiledFontsOn ()

virtual void	ForceCompiledFontsOff ()

Public Member Functions inherited from vtkObject
	vtkBaseTypeMacro (vtkObject, vtkObjectBase)

virtual void	DebugOn ()
	Turn debugging output on. More...

virtual void	DebugOff ()
	Turn debugging output off. More...

bool	GetDebug ()
	Get the value of the debug flag. More...

void	SetDebug (bool debugFlag)
	Set the value of the debug flag. More...

virtual void	Modified ()
	Update the modification time for this object. More...

virtual vtkMTimeType	GetMTime ()
	Return this object's modified time. More...

unsigned long	AddObserver (unsigned long event, vtkCommand *, float priority=0.0f)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...

unsigned long	AddObserver (const char event, vtkCommand , float priority=0.0f)

vtkCommand *	GetCommand (unsigned long tag)

void	RemoveObserver (vtkCommand *)

void	RemoveObservers (unsigned long event, vtkCommand *)

void	RemoveObservers (const char event, vtkCommand )

vtkTypeBool	HasObserver (unsigned long event, vtkCommand *)

vtkTypeBool	HasObserver (const char event, vtkCommand )

void	RemoveObserver (unsigned long tag)

void	RemoveObservers (unsigned long event)

void	RemoveObservers (const char *event)

void	RemoveAllObservers ()

vtkTypeBool	HasObserver (unsigned long event)

vtkTypeBool	HasObserver (const char *event)

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::*callback)(), float priority=0.0f)
	Overloads to AddObserver that allow developers to add class member functions as callbacks for events. More...

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::callback)(vtkObject , unsigned long, void *), float priority=0.0f)

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, bool(T::callback)(vtkObject , unsigned long, void *), float priority=0.0f)
	Allow user to set the AbortFlagOn() with the return value of the callback method. More...

int	InvokeEvent (unsigned long event, void *callData)
	This method invokes an event and return whether the event was aborted or not. More...

int	InvokeEvent (const char event, void callData)

int	InvokeEvent (unsigned long event)

int	InvokeEvent (const char *event)

Public Member Functions inherited from vtkObjectBase
const char *	GetClassName () const
	Return the class name as a string. More...

virtual void	Delete ()
	Delete a VTK object. More...

virtual void	FastDelete ()
	Delete a reference to this object. More...

void	InitializeObjectBase ()

void	Print (ostream &os)
	Print an object to an ostream. More...

virtual void	PrintHeader (ostream &os, vtkIndent indent)

virtual void	PrintTrailer (ostream &os, vtkIndent indent)

virtual void	Register (vtkObjectBase *o)
	Increase the reference count (mark as used by another object). More...

virtual void	UnRegister (vtkObjectBase *o)
	Decrease the reference count (release by another object). More...

int	GetReferenceCount ()
	Return the current reference count of this object. More...

void	SetReferenceCount (int)
	Sets the reference count. More...

void	PrintRevisions (ostream &)
	Legacy. More...

Static Public Member Functions
static vtkTypeBool	IsTypeOf (const char *type)

static vtkFontConfigFreeTypeTools *	SafeDownCast (vtkObjectBase *o)

static vtkFontConfigFreeTypeTools *	New ()
	Creates a new object of this type, but it is not preferred to use this method directly. More...

static bool	LookupFaceFontConfig (vtkTextProperty tprop, FT_Library lib, FT_Face face)
	Modified version of vtkFreeTypeTools::LookupFace that locates FontConfig faces. More...

Static Public Member Functions inherited from vtkFreeTypeTools
static vtkTypeBool	IsTypeOf (const char *type)

static vtkFreeTypeTools *	SafeDownCast (vtkObjectBase *o)

static vtkFreeTypeTools *	GetInstance ()
	Return the singleton instance with no reference counting. More...

static void	SetInstance (vtkFreeTypeTools *instance)
	Supply a user defined instance. More...

static vtkTypeUInt16	HashString (const char *str)
	Turn a string into a hash. More...

static vtkTypeUInt32	HashBuffer (const void *str, size_t n, vtkTypeUInt32 hash=0)
	Hash a string of a given length. More...

static bool	LookupFace (vtkTextProperty tprop, FT_Library lib, FT_Face face)
	Lookup and set the FreeType font face face best matching the text property tprop using the compiled Arial, Times, and Courier fonts. More...

Static Public Member Functions inherited from vtkObject
static vtkObject *	New ()
	Create an object with Debug turned off, modified time initialized to zero, and reference counting on. More...

static void	BreakOnError ()
	This method is called when vtkErrorMacro executes. More...

static void	SetGlobalWarningDisplay (int val)
	This is a global flag that controls whether any debug, warning or error messages are displayed. More...

static void	GlobalWarningDisplayOn ()

static void	GlobalWarningDisplayOff ()

static int	GetGlobalWarningDisplay ()

Static Public Member Functions inherited from vtkObjectBase
static vtkTypeBool	IsTypeOf (const char *name)
	Return 1 if this class type is the same type of (or a subclass of) the named class. More...

static vtkObjectBase *	New ()
	Create an object with Debug turned off, modified time initialized to zero, and reference counting on. More...

Protected Member Functions
virtual vtkObjectBase *	NewInstanceInternal () const

	vtkFontConfigFreeTypeTools ()

	~vtkFontConfigFreeTypeTools () override

FT_Error	CreateFTCManager () override
	Reimplemented from Superclass to use the FontConfig face lookup callback. More...

Protected Member Functions inherited from vtkFreeTypeTools
bool	PrepareMetaData (vtkTextProperty *tprop, int dpi, MetaData &metaData)

bool	PrepareImageMetaData (vtkTextProperty tprop, vtkImageData image, ImageMetaData &metaData)

void	PrepareImageData (vtkImageData *data, int bbox[4])
	This function initializes the extent of the ImageData to eventually receive the text stored in str. More...

void	RenderBackground (vtkTextProperty tprop, vtkImageData image, ImageMetaData &metaData)
	Draw the background quad on the image. More...

bool	GetSize (vtkTextProperty tprop, FT_Size size)
	Given a text property, get the corresponding FreeType size object (a structure storing both a face and a specific size metric). More...

bool	GetFace (vtkTextProperty tprop, FT_Face face)
	Given a text property, get the corresponding FreeType face. More...

bool	GetGlyphIndex (vtkTextProperty tprop, FT_UInt32 c, FT_UInt gindex)
	Given a text property and a character, get the corresponding FreeType glyph index. More...

bool	GetGlyph (vtkTextProperty tprop, FT_UInt32 c, FT_Glyph glyph, int request=GLYPH_REQUEST_DEFAULT)

bool	GetSize (size_t tprop_cache_id, int font_size, FT_Size *size)

bool	GetSize (FTC_Scaler scaler, FT_Size *size)

bool	GetFace (size_t tprop_cache_id, FT_Face *face)

bool	GetGlyphIndex (size_t tprop_cache_id, FT_UInt32 c, FT_UInt *gindex)

bool	GetGlyph (size_t tprop_cache_id, int font_size, FT_UInt gindex, FT_Glyph *glyph, int request=GLYPH_REQUEST_DEFAULT)

bool	GetGlyph (FTC_Scaler scaler, FT_UInt gindex, FT_Glyph *glyph, int request=GLYPH_REQUEST_DEFAULT)

	vtkFreeTypeTools ()

	~vtkFreeTypeTools () override

bool	GetFace (vtkTextProperty *prop, size_t &prop_cache_id, FT_Face &face, bool &face_has_kerning)
	Attempt to get the typeface of the specified font. More...

FT_Bitmap *	GetBitmap (FT_UInt32 c, size_t prop_cache_id, int prop_font_size, FT_UInt &gindex, FT_BitmapGlyph &bitmap_glyph)
	Now attempt to get the bitmap for the specified character. More...

FT_Bitmap *	GetBitmap (FT_UInt32 c, FTC_Scaler scaler, FT_UInt &gindex, FT_BitmapGlyph &bitmap_glyph)

FT_Outline *	GetOutline (FT_UInt32 c, size_t prop_cache_id, int prop_font_size, FT_UInt &gindex, FT_OutlineGlyph &outline_glyph)
	Attempt to get the outline for the specified character. More...

FT_Outline *	GetOutline (FT_UInt32 c, FTC_Scaler scaler, FT_UInt &gindex, FT_OutlineGlyph &outline_glyph)

FTC_Manager *	GetCacheManager ()
	Get the FreeType cache manager, image cache and charmap cache. More...

FTC_ImageCache *	GetImageCache ()

FTC_CMapCache *	GetCMapCache ()

void	InitializeCacheManager ()

void	ReleaseCacheManager ()

Protected Member Functions inherited from vtkObject
	vtkObject ()

	~vtkObject () override

void	RegisterInternal (vtkObjectBase *, vtkTypeBool check) override

void	UnRegisterInternal (vtkObjectBase *, vtkTypeBool check) override

void	InternalGrabFocus (vtkCommand mouseEvents, vtkCommand keypressEvents=nullptr)
	These methods allow a command to exclusively grab all events. More...

void	InternalReleaseFocus ()

Protected Member Functions inherited from vtkObjectBase
	vtkObjectBase ()

virtual	~vtkObjectBase ()

virtual void	CollectRevisions (ostream &)

virtual void	ReportReferences (vtkGarbageCollector *)

	vtkObjectBase (const vtkObjectBase &)

void	operator= (const vtkObjectBase &)

Additional Inherited Members
Protected Types inherited from vtkFreeTypeTools
enum	{ GLYPH_REQUEST_DEFAULT = 0, GLYPH_REQUEST_BITMAP = 1, GLYPH_REQUEST_OUTLINE = 2 }
	Given a text property and a character, get the corresponding FreeType glyph. More...

Protected Attributes inherited from vtkFreeTypeTools
bool	ScaleToPowerTwo
	Should the image be scaled to the next highest power of 2? More...

vtkTextPropertyLookup *	TextPropertyLookup
	Lookup table that maps free type font cache face ids to vtkTextProperties. More...

FT_Library *	Library
	FreeType library instance. More...

FTC_Manager *	CacheManager
	The cache manager, image cache and charmap cache. More...

FTC_ImageCache *	ImageCache

FTC_CMapCache *	CMapCache

unsigned int	MaximumNumberOfFaces

unsigned int	MaximumNumberOfSizes

unsigned long	MaximumNumberOfBytes

bool	ForceCompiledFonts

bool	DebugTextures

Protected Attributes inherited from vtkObject
bool	Debug

vtkTimeStamp	MTime

vtkSubjectHelper *	SubjectHelper

Protected Attributes inherited from vtkObjectBase
std::atomic< int32_t >	ReferenceCount

vtkWeakPointerBase **	WeakPointers

Static Protected Attributes inherited from vtkFreeTypeTools
static vtkFreeTypeTools *	Instance
	The singleton instance. More...

Detailed Description

Subclass of vtkFreeTypeTools that uses system installed fonts.

vtkFontConfigFreeTypeTools defers to vtkFreeTypeTools for rendering and rasterization, but sources fonts from a FontConfig system lookup. If the lookup fails, the compiled fonts of vtkFreeType are used instead.

Warning: Do not instantiate this class directly. Rather, call vtkFreeTypeTools::GetInstance() to ensure that the singleton design is correctly applied. Be aware that FontConfig lookup is disabled by default. To enable, call vtkFreeTypeTools::GetInstance()->ForceCompiledFontsOff();

Definition at line 40 of file vtkFontConfigFreeTypeTools.h.

Member Typedef Documentation

◆ Superclass

typedef vtkFreeTypeTools vtkFontConfigFreeTypeTools::Superclass

Definition at line 43 of file vtkFontConfigFreeTypeTools.h.

Constructor & Destructor Documentation

◆ vtkFontConfigFreeTypeTools()

vtkFontConfigFreeTypeTools::vtkFontConfigFreeTypeTools ( )

protected

◆ ~vtkFontConfigFreeTypeTools()

vtkFontConfigFreeTypeTools::~vtkFontConfigFreeTypeTools ( )

overrideprotected

Member Function Documentation

◆ IsTypeOf()

static vtkTypeBool vtkFontConfigFreeTypeTools::IsTypeOf ( const char * type )

static

◆ IsA()

virtual vtkTypeBool vtkFontConfigFreeTypeTools::IsA ( const char * name )

virtual

Return 1 if this class is the same type of (or a subclass of) the named class.

Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkFreeTypeTools.

◆ SafeDownCast()

static vtkFontConfigFreeTypeTools* vtkFontConfigFreeTypeTools::SafeDownCast ( vtkObjectBase * o )

static

◆ NewInstanceInternal()

virtual vtkObjectBase* vtkFontConfigFreeTypeTools::NewInstanceInternal ( ) const

protectedvirtual

Reimplemented from vtkFreeTypeTools.

◆ NewInstance()

vtkFontConfigFreeTypeTools* vtkFontConfigFreeTypeTools::NewInstance ( ) const

◆ PrintSelf()

void vtkFontConfigFreeTypeTools::PrintSelf	(	ostream &	os,
		vtkIndent	indent
	)

overridevirtual

Methods invoked by print to print information about the object including superclasses.

Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes.

Reimplemented from vtkFreeTypeTools.

◆ New()

static vtkFontConfigFreeTypeTools* vtkFontConfigFreeTypeTools::New ( )

static

Creates a new object of this type, but it is not preferred to use this method directly.

Instead, call vtkFreeTypeTools::GetInstance() and let the object factory create a new instance. In this way the singleton pattern of vtkFreeTypeTools is preserved.

◆ LookupFaceFontConfig()

static bool vtkFontConfigFreeTypeTools::LookupFaceFontConfig	(	vtkTextProperty *	tprop,
		FT_Library	lib,
		FT_Face *	face
	)

static

Modified version of vtkFreeTypeTools::LookupFace that locates FontConfig faces.

Falls back to the Superclass method for compiled fonts if the FontConfig lookup fails.

◆ CreateFTCManager()

FT_Error vtkFontConfigFreeTypeTools::CreateFTCManager ( )

overrideprotectedvirtual

Reimplemented from Superclass to use the FontConfig face lookup callback.

Reimplemented from vtkFreeTypeTools.

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

dox/Rendering/FreeTypeFontConfig/vtkFontConfigFreeTypeTools.h

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ Superclass

Constructor & Destructor Documentation

◆ vtkFontConfigFreeTypeTools()

◆ ~vtkFontConfigFreeTypeTools()

Member Function Documentation

◆ IsTypeOf()

◆ IsA()

◆ SafeDownCast()

◆ NewInstanceInternal()

◆ NewInstance()

◆ PrintSelf()

◆ New()

◆ LookupFaceFontConfig()

◆ CreateFTCManager()