Class representing a font in the system. More...

#include <OgreFont.h>

Inheritance diagram for Ogre::Font:

Public Types
typedef GlyphInfo::CodePoint	CodePoint

typedef std::pair< CodePoint, CodePoint >	CodePointRange
	A range of code points, inclusive on both ends.

typedef std::vector< CodePointRange >	CodePointRangeList

typedef GlyphInfo::UVRect	UVRect

Public Types inherited from Ogre::Resource
enum	LoadingFlags { LF_DEFAULT = 0 , LF_INCLUDE_NON_RELOADABLE = 1 , LF_ONLY_UNREFERENCED = 2 , LF_ONLY_UNREFERENCED_INCLUDE_NON_RELOADABLE = 3 , LF_PRESERVE_STATE = 4 }
	Enum that allow to choose subset of unloaded/reloaded resources and to adjust reloading behavior. More...

enum	LoadingState { LOADSTATE_UNLOADED , LOADSTATE_LOADING , LOADSTATE_LOADED , LOADSTATE_UNLOADING , LOADSTATE_PREPARED , LOADSTATE_PREPARING }
	Enum identifying the loading state of the resource. More...

Public Member Functions
	Font (ResourceManager creator, const String &name, ResourceHandle handle, const String &group, bool isManual=false, ManualResourceLoader loader=0)
	Constructor.

virtual	~Font ()

void	_setMaterial (const MaterialPtr &mat)
	Manually set the material used for this font.

void	addCodePointRange (const CodePointRange &range)
	Adds a range of code points to the list of code point ranges to generate glyphs for, if this is a truetype based font.

void	clearCodePointRanges ()
	Clear the list of code point ranges.

bool	getAntialiasColour (void) const
	Gets whether or not the colour of this font is antialiased as it is generated from a true type font.

const CodePointRangeList &	getCodePointRangeList () const
	Get a const reference to the list of code point ranges to be used to generate glyphs from a truetype font.

float	getGlyphAspectRatio (CodePoint id) const
	Gets the aspect ratio (width / height) of this character.

const GlyphInfo &	getGlyphInfo (CodePoint id) const
	Gets the information available for a glyph corresponding to a given code point, or throws an exception if it doesn't exist;.

const UVRect &	getGlyphTexCoords (CodePoint id) const
	Returns the texture coordinates of the associated glyph.

const MaterialPtr &	getMaterial () const
	Gets the material generated for this font, as a weak reference.

const String &	getSource (void) const
	Gets the source this font (either an image or a truetype font).

int	getTrueTypeMaxBearingY () const
	Gets the maximum baseline distance of all glyphs used in the texture.

uint	getTrueTypeResolution (void) const
	Gets the resolution (dpi) of the font used to generate the texture.

Real	getTrueTypeSize (void) const
	Gets the point size of the font used to generate the texture.

FontType	getType (void) const
	Gets the type of font.

void	loadResource (Resource *resource) override
	Implementation of ManualResourceLoader::loadResource, called when the Texture that this font creates needs to (re)load.

void	putText (BillboardSet *bbs, String text, float height, const ColourValue &colour=ColourValue::White)
	Write a text into a BillboardSet for positioning in Space.

void	setAntialiasColour (bool enabled)
	Sets whether the colour of this font is multiplied with alpha as it is generated from a true type font.

void	setGlyphAspectRatio (CodePoint id, Real ratio)
	Sets the aspect ratio (width / height) of this character.

void	setGlyphInfo (const GlyphInfo &info)

void	setGlyphInfoFromTexCoords (CodePoint id, const UVRect &rect, float textureAspect=1.0)
	Sets the texture coordinates of a glyph.

void	setSource (const String &source)
	Sets the source of the font.

void	setTrueTypeResolution (uint ttfResolution)
	Gets the resolution (dpi) of the font used to generate the texture (only required for FT_TRUETYPE).

void	setTrueTypeSize (Real ttfSize)
	Sets the size of a truetype font (only required for FT_TRUETYPE).

void	setType (FontType ftype)
	Sets the type of font.

Public Member Functions inherited from Ogre::Resource
	Resource (ResourceManager creator, const String &name, ResourceHandle handle, const String &group, bool isManual=false, ManualResourceLoader loader=0)
	Standard constructor.

virtual	~Resource ()
	Virtual destructor.

virtual void	_dirtyState ()
	Manually mark the state of this resource as having been changed.

void	_fireLoadingComplete (bool unused=false)
	Firing of loading complete event.

void	_firePreparingComplete (bool unused=false)
	Firing of preparing complete event.

void	_fireUnloadingComplete (void)
	Firing of unloading complete event.

void	_notifyOrigin (const String &origin)
	Notify this resource of it's origin.

virtual void	addListener (Listener *lis)
	Register a listener on this resource.

virtual void	changeGroupOwnership (const String &newGroup)
	Change the resource group ownership of a Resource.

virtual void	escalateLoading ()
	Escalates the loading of a background loaded resource.

ResourceManager *	getCreator (void)
	Gets the manager which created this resource.

const String &	getGroup (void) const
	Gets the group which this resource is a member of.

ResourceHandle	getHandle (void) const

LoadingState	getLoadingState () const
	Returns the current loading state.

const String &	getName (void) const
	Gets resource name.

const String &	getOrigin (void) const
	Get the origin of this resource, e.g.

size_t	getSize (void) const
	Retrieves info about the size of the resource.

virtual size_t	getStateCount () const
	Returns the number of times this resource has changed state, which generally means the number of times it has been loaded.

bool	isBackgroundLoaded (void) const
	Returns whether this Resource has been earmarked for background loading.

bool	isLoaded (void) const
	Returns true if the Resource has been loaded, false otherwise.

bool	isLoading () const
	Returns whether the resource is currently in the process of background loading.

bool	isManuallyLoaded (void) const
	Is this resource manually loaded?

bool	isPrepared (void) const
	Returns true if the Resource has been prepared, false otherwise.

bool	isReloadable (void) const
	Returns true if the Resource is reloadable, false otherwise.

virtual void	load (bool backgroundThread=false)
	Loads the resource, if it is not already.

virtual void	prepare (bool backgroundThread=false)
	Prepares the resource for load, if it is not already.

virtual void	reload (LoadingFlags flags=LF_DEFAULT)
	Reloads the resource, if it is already loaded.

virtual void	removeListener (Listener *lis)
	Remove a listener on this resource.

void	setBackgroundLoaded (bool bl)
	Tells the resource whether it is background loaded or not.

virtual void	touch (void)
	'Touches' the resource to indicate it has been used.

virtual void	unload (void)
	Unloads the resource; this is not permanent, the resource can be reloaded later if required.

Public Member Functions inherited from Ogre::StringInterface
	StringInterface ()

virtual	~StringInterface ()
	Virtual destructor, see Effective C++.

void	copyParametersTo (StringInterface *dest) const
	Method for copying this object's parameters to another object.

ParamDictionary *	getParamDictionary (void)
	Retrieves the parameter dictionary for this class.

const ParamDictionary *	getParamDictionary (void) const

String	getParameter (const String &name) const
	Generic parameter retrieval method.

const ParameterList &	getParameters (void) const
	Retrieves a list of parameters valid for this object.

bool	setParameter (const String &name, const String &value)
	Generic parameter setting method.

void	setParameterList (const NameValuePairList &paramList)
	Generic multiple parameter setting method.

Public Member Functions inherited from Ogre::ManualResourceLoader
	ManualResourceLoader ()

virtual	~ManualResourceLoader ()

virtual void	prepareResource (Resource *resource)
	Called when a resource wishes to prepare instead of Resource::prepareImpl.

Additional Inherited Members
Static Public Member Functions inherited from Ogre::StringInterface
static void	cleanupDictionary ()
	Cleans up the static 'msDictionary' required to reset Ogre, otherwise the containers are left with invalid pointers, which will lead to a crash as soon as one of the ResourceManager implementers (e.g.

Detailed Description

Class representing a font in the system.

This class is simply a way of getting a font texture into the OGRE system and to easily retrieve the texture coordinates required to accurately render them. Fonts can either be loaded from precreated textures, or the texture can be generated using a truetype font. You can either create the texture manually in code, or you can use a .fontdef script to define it (probably more practical since you can reuse the definition more easily)

Note: This class extends both Resource and ManualResourceLoader since it is both a resource in it's own right, but it also provides the manual load implementation for the Texture it creates.

Member Typedef Documentation

◆ CodePoint

typedef GlyphInfo::CodePoint Ogre::Font::CodePoint

◆ UVRect

typedef GlyphInfo::UVRect Ogre::Font::UVRect

◆ CodePointRange

typedef std::pair<CodePoint, CodePoint> Ogre::Font::CodePointRange

A range of code points, inclusive on both ends.

◆ CodePointRangeList

typedef std::vector<CodePointRange> Ogre::Font::CodePointRangeList

Constructor & Destructor Documentation

◆ Font()

Ogre::Font::Font	(	ResourceManager *	creator,
		const String &	name,
		ResourceHandle	handle,
		const String &	group,
		bool	isManual = `false`,
		ManualResourceLoader *	loader = `0`
	)

Constructor.

See also: Resource

◆ ~Font()

virtual Ogre::Font::~Font ( )

virtual

Member Function Documentation

◆ setType()

void Ogre::Font::setType ( FontType ftype )

Sets the type of font.

Must be set before loading.

◆ getType()

FontType Ogre::Font::getType ( void ) const

Gets the type of font.

◆ setSource()

void Ogre::Font::setSource ( const String & source )

Sets the source of the font.

If you have created a font of type FT_IMAGE, this method tells the Font which image to use as the source for the characters. So the parameter should be the name of an appropriate image file. Note that when using an image as a font source, you will also need to tell the font where each character is located using setGlyphTexCoords (for each character).

: If you have created a font of type FT_TRUETYPE, this method tells the Font which .ttf file to use to generate the text. You will also need to call setTrueTypeSize and setTrueTypeResolution, and call addCodePointRange as many times as required to define the range of glyphs you want to be available.

Parameters

source An image file or a truetype font, depending on the type of this font

◆ getSource()

const String & Ogre::Font::getSource ( void ) const

Gets the source this font (either an image or a truetype font).

◆ setTrueTypeSize()

void Ogre::Font::setTrueTypeSize ( Real ttfSize )

Sets the size of a truetype font (only required for FT_TRUETYPE).

Parameters

ttfSize The size of the font in points. Note that the size of the font does not affect how big it is on the screen, just how large it is in the texture and thus how detailed it is.

◆ setTrueTypeResolution()

void Ogre::Font::setTrueTypeResolution ( uint ttfResolution )

Gets the resolution (dpi) of the font used to generate the texture (only required for FT_TRUETYPE).

Parameters

ttfResolution The resolution in dpi

◆ getTrueTypeSize()

Real Ogre::Font::getTrueTypeSize ( void ) const

Gets the point size of the font used to generate the texture.

Only applicable for FT_TRUETYPE Font objects. Note that the size of the font does not affect how big it is on the screen, just how large it is in the texture and thus how detailed it is.

◆ getTrueTypeResolution()

uint Ogre::Font::getTrueTypeResolution ( void ) const

Gets the resolution (dpi) of the font used to generate the texture.

Only applicable for FT_TRUETYPE Font objects.

◆ getTrueTypeMaxBearingY()

int Ogre::Font::getTrueTypeMaxBearingY ( ) const

Gets the maximum baseline distance of all glyphs used in the texture.

Only applicable for FT_TRUETYPE Font objects. The baseline is the vertical origin of horizontal based glyphs. The bearingY attribute is the distance from the baseline (origin) to the top of the glyph's bounding box.

Note: This value is only available after the font has been loaded.

◆ getGlyphTexCoords()

const UVRect & Ogre::Font::getGlyphTexCoords ( CodePoint id ) const

inline

Returns the texture coordinates of the associated glyph.

Remarks: Parameter is a short to allow both ASCII and wide chars.

Parameters

id	The code point (unicode)

Returns: A rectangle with the UV coordinates, or null UVs if the code point was not present

◆ setGlyphInfoFromTexCoords()

void Ogre::Font::setGlyphInfoFromTexCoords	(	CodePoint	id,
		const UVRect &	rect,
		float	textureAspect = `1.0`
	)

inline

Sets the texture coordinates of a glyph.

You only need to call this if you're setting up a font loaded from a texture manually.

Note: Also sets the aspect ratio (width / height) of this character. textureAspect is the width/height of the texture (may be non-square)

References Ogre::TRect< T >::height(), and Ogre::TRect< T >::width().

◆ setGlyphInfo()

void Ogre::Font::setGlyphInfo ( const GlyphInfo & info )

inline

◆ getGlyphAspectRatio()

float Ogre::Font::getGlyphAspectRatio ( CodePoint id ) const

inline

Gets the aspect ratio (width / height) of this character.

◆ setGlyphAspectRatio()

void Ogre::Font::setGlyphAspectRatio	(	CodePoint	id,
		Real	ratio
	)

inline

Sets the aspect ratio (width / height) of this character.

You only need to call this if you're setting up a font loaded from a texture manually.

◆ getGlyphInfo()

const GlyphInfo & Ogre::Font::getGlyphInfo ( CodePoint id ) const

inline

Gets the information available for a glyph corresponding to a given code point, or throws an exception if it doesn't exist;.

References Ogre::Exception::ERR_ITEM_NOT_FOUND, Ogre::StringUtil::format(), and OGRE_EXCEPT.

◆ addCodePointRange()

void Ogre::Font::addCodePointRange ( const CodePointRange & range )

inline

Adds a range of code points to the list of code point ranges to generate glyphs for, if this is a truetype based font.

In order to save texture space, only the glyphs which are actually needed by the application are generated into the texture. Before this object is loaded you must call this method as many times as necessary to define the code point range that you need.

◆ clearCodePointRanges()

void Ogre::Font::clearCodePointRanges ( )

inline

Clear the list of code point ranges.

◆ getCodePointRangeList()

const CodePointRangeList & Ogre::Font::getCodePointRangeList ( ) const

inline

Get a const reference to the list of code point ranges to be used to generate glyphs from a truetype font.

◆ getMaterial()

const MaterialPtr & Ogre::Font::getMaterial ( ) const

inline

Gets the material generated for this font, as a weak reference.

This will only be valid after the Font has been loaded.

◆ putText()

void Ogre::Font::putText	(	BillboardSet *	bbs,
		String	text,
		float	height,
		const ColourValue &	colour = `ColourValue::White`
	)

Write a text into a BillboardSet for positioning in Space.

Text is laid out in the x-y plane, running into x+ and using y+ as up

Parameters

bbs	the target BillboardSet
text	text to write
height	character height in world units
colour	text colour

◆ setAntialiasColour()

void Ogre::Font::setAntialiasColour ( bool enabled )

inline

Sets whether the colour of this font is multiplied with alpha as it is generated from a true type font.

This is valid only for a FT_TRUETYPE font. If you are planning on using alpha blending to draw your font, then set this to false (which is the default), otherwise the darkening of the font will combine with the fading out of the alpha around the edges and make your font look thinner than it should. However, if you intend to use premultipled alpha or a colour blending mode (add or modulate for example) then set this to true, in order to soften your font edges.

◆ getAntialiasColour()

bool Ogre::Font::getAntialiasColour ( void ) const

inline

Gets whether or not the colour of this font is antialiased as it is generated from a true type font.

◆ loadResource()

void Ogre::Font::loadResource ( Resource * resource )

overridevirtual

Implementation of ManualResourceLoader::loadResource, called when the Texture that this font creates needs to (re)load.

Implements Ogre::ManualResourceLoader.

◆ _setMaterial()

void Ogre::Font::_setMaterial ( const MaterialPtr & mat )

Manually set the material used for this font.

This should only be used when the font is being loaded from a ManualResourceLoader.

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

OgreFont.h

Public Types

Public Member Functions

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ CodePoint

◆ UVRect

◆ CodePointRange

◆ CodePointRangeList

Constructor & Destructor Documentation

◆ Font()

◆ ~Font()

Member Function Documentation

◆ setType()

◆ getType()

◆ setSource()

◆ getSource()

◆ setTrueTypeSize()

◆ setTrueTypeResolution()

◆ getTrueTypeSize()

◆ getTrueTypeResolution()

◆ getTrueTypeMaxBearingY()

◆ getGlyphTexCoords()

◆ setGlyphInfoFromTexCoords()

◆ setGlyphInfo()

◆ getGlyphAspectRatio()

◆ setGlyphAspectRatio()

◆ getGlyphInfo()

◆ addCodePointRange()

◆ clearCodePointRanges()

◆ getCodePointRangeList()

◆ getMaterial()

◆ putText()

◆ setAntialiasColour()

◆ getAntialiasColour()

◆ loadResource()

◆ _setMaterial()