Class representing a TrueType font. More...

#include <CGUITTFont.h>

Inheritance diagram for irr::gui::CGUITTFont:

Collaboration diagram for irr::gui::CGUITTFont:

Public Member Functions
virtual	~CGUITTFont ()
	Destructor.

void	setBatchLoadSize (u32 batch_size)
	Sets the amount of glyphs to batch load.

void	setMaxPageTextureSize (const core::dimension2du &texture_size)
	Sets the maximum texture size for a page of glyphs.

u32	getFontSize () const
	Get the font size.

bool	isTransparent () const
	Check the font's transparency.

bool	useAutoHinting () const
	Check if the font auto-hinting is enabled.

bool	useHinting () const
	Check if the font hinting is enabled.

bool	useMonochrome () const
	Check if the font is being loaded as a monochrome font.

void	setTransparency (const bool flag)
	Tells the font to allow transparency when rendering.

void	setMonochrome (const bool flag)
	Tells the font to use monochrome rendering.

void	setFontHinting (const bool enable, const bool enable_auto_hinting=true)
	Enables or disables font hinting.

virtual void	draw (const core::stringw &text, const core::rect< s32 > &position, video::SColor color, bool hcenter=false, bool vcenter=false, const core::rect< s32 > *clip=0) override
	Draws some text and clips it to the specified rectangle if wanted.

void	draw (const EnrichedString &text, const core::rect< s32 > &position, bool hcenter=false, bool vcenter=false, const core::rect< s32 > *clip=0)

virtual core::dimension2du	getDimension (const wchar_t *text) const override
	Returns the dimension of a text string.

virtual s32	getCharacterFromPos (const wchar_t *text, s32 pixel_x) const override
	Calculates the index of the character in the text which is on a specific position.

virtual void	setKerningWidth (s32 kerning) override
	Sets global kerning width for the font.

virtual void	setKerningHeight (s32 kerning) override
	Sets global kerning height for the font.

virtual core::vector2di	getKerning (const wchar_t thisLetter, const wchar_t previousLetter) const override
	Returns the distance between letters.

virtual void	setInvisibleCharacters (const wchar_t *s) override
	Define which characters should not be drawn by the font.

CGUITTGlyphPage *	getLastGlyphPage () const
	Get the last glyph page if there's still available slots.

CGUITTGlyphPage *	createGlyphPage (const u8 pixel_mode)
	Create a new glyph page texture.

u32	getLastGlyphPageIndex () const
	Get the last glyph page's index.

void	setFallback (gui::IGUIFont *font)
	Set font that should be used for glyphs not present in ours.

video::IImage *	createTextureFromChar (const char32_t &ch)
	Create corresponding character's software image copy from the font, so you can use this data just like any ordinary video::IImage.

video::ITexture *	getPageTextureByIndex (const u32 &page_index) const
	This function is for debugging mostly.

video::IVideoDriver *	getDriver () const

s32	getAscender () const

Static Public Member Functions
static CGUITTFont *	createTTFont (IGUIEnvironment *env, const io::path &filename, const u32 size, const bool antialias=true, const bool transparency=true, const u32 shadow=0, const u32 shadow_alpha=255)
	Creates a new TrueType font and returns a pointer to it.

Protected Attributes
bool	use_monochrome

bool	use_transparency

bool	use_hinting

bool	use_auto_hinting

u32	size

u32	batch_load_size

core::dimension2du	max_page_texture_size

Private Member Functions
core::dimension2d< u32 >	getDimension (const std::u32string &text) const

s32	getCharacterFromPos (const std::u32string &text, s32 pixel_x) const

std::u32string	convertWCharToU32String (const wchar_t *const) const

	CGUITTFont (IGUIEnvironment *env)
	Constructor.

bool	load (const io::path &filename, const u32 size, const bool antialias, const bool transparency)

void	reset_images ()

void	update_glyph_pages () const

void	update_load_flags ()

u32	getWidthFromCharacter (char32_t c) const

u32	getHeightFromCharacter (char32_t c) const

u32	getGlyphIndexByChar (char32_t c) const

core::vector2di	getKerning (const char32_t thisLetter, const char32_t previousLetter) const

Private Attributes
video::IVideoDriver *	Driver

io::path	filename

FT_Face	tt_face

FT_Size_Metrics	font_metrics

FT_Int32	load_flags

core::array< CGUITTGlyphPage * >	Glyph_Pages

core::array< SGUITTGlyph >	Glyphs

s32	GlobalKerningWidth

s32	GlobalKerningHeight

std::u32string	Invisible

u32	shadow_offset

u32	shadow_alpha

gui::IGUIFont *	fallback

Static Private Attributes
static FT_Library	c_library

static std::map< io::path, SGUITTFace * >	c_faces

static bool	c_libraryLoaded = false

Detailed Description

Class representing a TrueType font.

Constructor & Destructor Documentation

◆ ~CGUITTFont()

irr::gui::CGUITTFont::~CGUITTFont ( )

virtual

Destructor.

References c_faces, c_library, c_libraryLoaded, Driver, filename, Glyphs, and reset_images().

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◆ CGUITTFont()

irr::gui::CGUITTFont::CGUITTFont ( IGUIEnvironment * env )

private

Constructor.

References Driver, and setInvisibleCharacters().

Referenced by createTTFont().

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Member Function Documentation

◆ convertWCharToU32String()

std::u32string irr::gui::CGUITTFont::convertWCharToU32String ( const wchar_t * const charArray ) const

private

References p().

Referenced by draw(), getCharacterFromPos(), getDimension(), and setInvisibleCharacters().

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◆ createGlyphPage()

CGUITTGlyphPage * irr::gui::CGUITTFont::createGlyphPage ( const u8 pixel_mode )

Create a new glyph page texture.

Parameters

pixel_mode the pixel mode defined by FT_Pixel_Mode

References irr::gui::CGUITTGlyphPage::available_slots, irr::gui::CGUITTGlyphPage::createPageTexture(), Driver, errorstream, Glyph_Pages, max_page_texture_size, size, and tt_face.

Referenced by irr::gui::SGUITTGlyph::preload().

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◆ createTextureFromChar()

video::IImage * irr::gui::CGUITTFont::createTextureFromChar ( const char32_t & ch )

Create corresponding character's software image copy from the font, so you can use this data just like any ordinary video::IImage.

Parameters

ch	The character you need

References irr::gui::CGUITTGlyphPage::dirty, Driver, getGlyphIndexByChar(), irr::gui::SGUITTGlyph::glyph_page, Glyph_Pages, Glyphs, irr::gui::SGUITTGlyph::source_rect, irr::gui::CGUITTGlyphPage::texture, and irr::gui::CGUITTGlyphPage::updateTexture().

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◆ createTTFont()

CGUITTFont * irr::gui::CGUITTFont::createTTFont	(	IGUIEnvironment *	env,
		const io::path &	filename,
		const u32	size,
		const bool	antialias = true,
		const bool	transparency = true,
		const u32	shadow = 0,
		const u32	shadow_alpha = 255 )

static

Creates a new TrueType font and returns a pointer to it.

The pointer must be drop()'ed when finished.

Parameters

env	The IGUIEnvironment the font loads out of.
filename	The filename of the font.
size	The size of the font glyphs in pixels. Since this is the size of the individual glyphs, the true height of the font may change depending on the characters used.
antialias	set the use_monochrome (opposite to antialias) flag
transparency	set the use_transparency flag

Returns: Returns a pointer to a CGUITTFont. Will return 0 if the font failed to load.

References CGUITTFont(), c_library, c_libraryLoaded, filename, load(), shadow_alpha, shadow_offset, and size.

Referenced by FontEngine::initFont().

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◆ draw() [1/2]

void irr::gui::CGUITTFont::draw	(	const core::stringw &	text,
		const core::rect< s32 > &	position,
		video::SColor	color,
		bool	hcenter = false,
		bool	vcenter = false,
		const core::rect< s32 > *	clip = 0 )

overridevirtual

Draws some text and clips it to the specified rectangle if wanted.

References draw().

Referenced by draw(), irr::gui::StaticText::draw(), Hud::drawLuaElements(), and GUIChatConsole::drawText().

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◆ draw() [2/2]

void irr::gui::CGUITTFont::draw	(	const EnrichedString &	text,
		const core::rect< s32 > &	position,
		bool	hcenter = false,
		bool	vcenter = false,
		const core::rect< s32 > *	clip = 0 )

References EnrichedString::c_str(), convertWCharToU32String(), Driver, fallback, font_metrics, EnrichedString::getColors(), getDimension(), getGlyphIndexByChar(), getKerning(), getWidthFromCharacter(), irr::gui::SGUITTGlyph::glyph_page, Glyph_Pages, Glyphs, Invisible, irr::gui::CGUITTGlyphPage::render_colors, irr::gui::CGUITTGlyphPage::render_positions, irr::gui::CGUITTGlyphPage::render_source_rects, shadow_alpha, shadow_offset, irr::gui::SGUITTGlyph::source_rect, irr::gui::CGUITTGlyphPage::texture, update_glyph_pages(), and use_transparency.

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◆ getAscender()

s32 irr::gui::CGUITTFont::getAscender ( ) const

inline

References font_metrics.

Referenced by TextDrawer::TextDrawer().

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◆ getCharacterFromPos() [1/2]

s32 irr::gui::CGUITTFont::getCharacterFromPos	(	const std::u32string &	text,
		s32	pixel_x ) const

private

References getKerning(), getWidthFromCharacter(), and x.

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◆ getCharacterFromPos() [2/2]

s32 irr::gui::CGUITTFont::getCharacterFromPos	(	const wchar_t *	text,
		s32	pixel_x ) const

overridevirtual

Calculates the index of the character in the text which is on a specific position.

References convertWCharToU32String(), and getCharacterFromPos().

Referenced by getCharacterFromPos().

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◆ getDimension() [1/2]

core::dimension2d< u32 > irr::gui::CGUITTFont::getDimension ( const std::u32string & text ) const

private

References getHeightFromCharacter(), getKerning(), getWidthFromCharacter(), and p().

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◆ getDimension() [2/2]

core::dimension2d< u32 > irr::gui::CGUITTFont::getDimension ( const wchar_t * text ) const

overridevirtual

Returns the dimension of a text string.

References convertWCharToU32String(), and getDimension().

Referenced by draw(), and getDimension().

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◆ getDriver()

video::IVideoDriver * irr::gui::CGUITTFont::getDriver ( ) const

inline

References Driver.

Referenced by irr::gui::SGUITTGlyph::preload().

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◆ getFontSize()

u32 irr::gui::CGUITTFont::getFontSize ( ) const

inline

Get the font size.

References size.

Referenced by GUITable::setTable().

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◆ getGlyphIndexByChar()

u32 irr::gui::CGUITTFont::getGlyphIndexByChar ( char32_t c ) const

private

References batch_load_size, irr::gui::SGUITTGlyph::glyph_page, Glyph_Pages, Glyphs, irr::gui::SGUITTGlyph::isLoaded(), load_flags, irr::gui::SGUITTGlyph::preload(), size, and tt_face.

Referenced by createTextureFromChar(), draw(), getHeightFromCharacter(), getKerning(), getWidthFromCharacter(), and load().

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◆ getHeightFromCharacter()

u32 irr::gui::CGUITTFont::getHeightFromCharacter ( char32_t c ) const

inlineprivate

References fallback, font_metrics, getGlyphIndexByChar(), and Glyphs.

Referenced by getDimension().

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◆ getKerning() [1/2]

core::vector2di irr::gui::CGUITTFont::getKerning	(	const char32_t	thisLetter,
		const char32_t	previousLetter ) const

private

References fallback, getGlyphIndexByChar(), GlobalKerningHeight, GlobalKerningWidth, size, and tt_face.

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◆ getKerning() [2/2]

core::vector2di irr::gui::CGUITTFont::getKerning	(	const wchar_t	thisLetter,
		const wchar_t	previousLetter ) const

overridevirtual

Returns the distance between letters.

References getKerning().

Referenced by draw(), getCharacterFromPos(), getDimension(), and getKerning().

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◆ getLastGlyphPage()

CGUITTGlyphPage * irr::gui::CGUITTFont::getLastGlyphPage ( ) const

Get the last glyph page if there's still available slots.

If not, it will return zero.

References irr::gui::CGUITTGlyphPage::available_slots, getLastGlyphPageIndex(), and Glyph_Pages.

Referenced by irr::gui::SGUITTGlyph::preload().

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◆ getLastGlyphPageIndex()

u32 irr::gui::CGUITTFont::getLastGlyphPageIndex ( ) const

inline

Get the last glyph page's index.

References Glyph_Pages.

Referenced by getLastGlyphPage(), and irr::gui::SGUITTGlyph::preload().

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◆ getPageTextureByIndex()

video::ITexture * irr::gui::CGUITTFont::getPageTextureByIndex ( const u32 & page_index ) const

This function is for debugging mostly.

If the page doesn't exist it returns zero.

Parameters

page_index Simply return the texture handle of a given page index.

References Glyph_Pages.

◆ getWidthFromCharacter()

u32 irr::gui::CGUITTFont::getWidthFromCharacter ( char32_t c ) const

inlineprivate

References fallback, font_metrics, getGlyphIndexByChar(), and Glyphs.

Referenced by draw(), getCharacterFromPos(), and getDimension().

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◆ isTransparent()

bool irr::gui::CGUITTFont::isTransparent ( ) const

inline

Check the font's transparency.

References use_transparency.

◆ load()

bool irr::gui::CGUITTFont::load	(	const io::path &	filename,
		const u32	size,
		const bool	antialias,
		const bool	transparency )

private

References batch_load_size, c_faces, c_library, Driver, errorstream, filename, font_metrics, getGlyphIndexByChar(), Glyphs, infostream, fs::ReadFile(), size, tt_face, update_load_flags(), use_monochrome, use_transparency, and verbosestream.

Referenced by createTTFont().

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◆ reset_images()

void irr::gui::CGUITTFont::reset_images ( )

private

References Glyph_Pages, Glyphs, and update_load_flags().

Referenced by ~CGUITTFont(), setFontHinting(), setMonochrome(), and setTransparency().

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◆ setBatchLoadSize()

void irr::gui::CGUITTFont::setBatchLoadSize ( u32 batch_size )

inline

Sets the amount of glyphs to batch load.

References batch_load_size.

◆ setFallback()

void irr::gui::CGUITTFont::setFallback ( gui::IGUIFont * font )

inline

Set font that should be used for glyphs not present in ours.

References fallback.

◆ setFontHinting()

void irr::gui::CGUITTFont::setFontHinting	(	const bool	enable,
		const bool	enable_auto_hinting = true )

Enables or disables font hinting.

Default: Hinting and auto-hinting true.

Parameters

enable	If false, font hinting is turned off. If true, font hinting is turned on.
enable_auto_hinting	If true, FreeType uses its own auto-hinting algorithm. If false, it tries to use the algorithm specified by the font.

References reset_images(), use_auto_hinting, and use_hinting.

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◆ setInvisibleCharacters()

void irr::gui::CGUITTFont::setInvisibleCharacters ( const wchar_t * s )

overridevirtual

Define which characters should not be drawn by the font.

References convertWCharToU32String(), and Invisible.

Referenced by CGUITTFont().

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◆ setKerningHeight()

void irr::gui::CGUITTFont::setKerningHeight ( s32 kerning )

overridevirtual

Sets global kerning height for the font.

References GlobalKerningHeight.

◆ setKerningWidth()

void irr::gui::CGUITTFont::setKerningWidth ( s32 kerning )

overridevirtual

Sets global kerning width for the font.

References GlobalKerningWidth.

◆ setMaxPageTextureSize()

void irr::gui::CGUITTFont::setMaxPageTextureSize ( const core::dimension2du & texture_size )

inline

Sets the maximum texture size for a page of glyphs.

References max_page_texture_size.

◆ setMonochrome()

void irr::gui::CGUITTFont::setMonochrome ( const bool flag )

Tells the font to use monochrome rendering.

Default: false.

Parameters

flag	If true, the font draws using a monochrome image. If false, the font uses a grayscale image.

References reset_images(), and use_monochrome.

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◆ setTransparency()

void irr::gui::CGUITTFont::setTransparency ( const bool flag )

Tells the font to allow transparency when rendering.

Default: true.

Parameters

flag	If true, the font draws using transparency.

References reset_images(), and use_transparency.

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◆ update_glyph_pages()

void irr::gui::CGUITTFont::update_glyph_pages ( ) const

private

References Glyph_Pages.

Referenced by draw().

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◆ update_load_flags()

void irr::gui::CGUITTFont::update_load_flags ( )

inlineprivate

References load_flags, useAutoHinting(), useHinting(), and useMonochrome().

Referenced by load(), and reset_images().

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◆ useAutoHinting()

bool irr::gui::CGUITTFont::useAutoHinting ( ) const

inline

Check if the font auto-hinting is enabled.

Auto-hinting is FreeType's built-in font hinting engine.

References use_auto_hinting.

Referenced by update_load_flags().

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◆ useHinting()

bool irr::gui::CGUITTFont::useHinting ( ) const

inline

Check if the font hinting is enabled.

References use_hinting.

Referenced by update_load_flags().

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◆ useMonochrome()

bool irr::gui::CGUITTFont::useMonochrome ( ) const

inline

Check if the font is being loaded as a monochrome font.

The font can either be a 256 color grayscale font, or a 2 color monochrome font.

References use_monochrome.

Referenced by update_load_flags().

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Member Data Documentation

◆ batch_load_size

u32 irr::gui::CGUITTFont::batch_load_size

protected

Referenced by getGlyphIndexByChar(), load(), and setBatchLoadSize().

◆ c_faces

std::map< io::path, SGUITTFace * > irr::gui::CGUITTFont::c_faces

staticprivate

Referenced by ~CGUITTFont(), and load().

◆ c_library

FT_Library irr::gui::CGUITTFont::c_library

staticprivate

Referenced by ~CGUITTFont(), createTTFont(), and load().

◆ c_libraryLoaded

bool irr::gui::CGUITTFont::c_libraryLoaded = false

staticprivate

Referenced by ~CGUITTFont(), and createTTFont().

◆ Driver

video::IVideoDriver* irr::gui::CGUITTFont::Driver

private

Referenced by CGUITTFont(), ~CGUITTFont(), createGlyphPage(), createTextureFromChar(), draw(), getDriver(), and load().

◆ fallback

gui::IGUIFont* irr::gui::CGUITTFont::fallback

private

Referenced by draw(), getHeightFromCharacter(), getKerning(), getWidthFromCharacter(), and setFallback().

◆ filename

io::path irr::gui::CGUITTFont::filename

private

Referenced by ~CGUITTFont(), createTTFont(), and load().

◆ font_metrics

FT_Size_Metrics irr::gui::CGUITTFont::font_metrics

private

Referenced by draw(), getAscender(), getHeightFromCharacter(), getWidthFromCharacter(), and load().

◆ GlobalKerningHeight

s32 irr::gui::CGUITTFont::GlobalKerningHeight

private

Referenced by getKerning(), and setKerningHeight().

◆ GlobalKerningWidth

s32 irr::gui::CGUITTFont::GlobalKerningWidth

private

Referenced by getKerning(), and setKerningWidth().

◆ Glyph_Pages

core::array<CGUITTGlyphPage*> irr::gui::CGUITTFont::Glyph_Pages

mutableprivate

Referenced by createGlyphPage(), createTextureFromChar(), draw(), getGlyphIndexByChar(), getLastGlyphPage(), getLastGlyphPageIndex(), getPageTextureByIndex(), reset_images(), and update_glyph_pages().

◆ Glyphs

core::array<SGUITTGlyph> irr::gui::CGUITTFont::Glyphs

mutableprivate

Referenced by ~CGUITTFont(), createTextureFromChar(), draw(), getGlyphIndexByChar(), getHeightFromCharacter(), getWidthFromCharacter(), load(), and reset_images().

◆ Invisible

std::u32string irr::gui::CGUITTFont::Invisible

private

Referenced by draw(), and setInvisibleCharacters().

◆ load_flags

FT_Int32 irr::gui::CGUITTFont::load_flags

private

Referenced by getGlyphIndexByChar(), and update_load_flags().

◆ max_page_texture_size

core::dimension2du irr::gui::CGUITTFont::max_page_texture_size

protected

Referenced by createGlyphPage(), and setMaxPageTextureSize().

◆ shadow_alpha

u32 irr::gui::CGUITTFont::shadow_alpha

private

Referenced by createTTFont(), and draw().

◆ shadow_offset

u32 irr::gui::CGUITTFont::shadow_offset

private

Referenced by createTTFont(), and draw().

◆ size

u32 irr::gui::CGUITTFont::size

protected

Referenced by createGlyphPage(), createTTFont(), getFontSize(), getGlyphIndexByChar(), getKerning(), and load().

◆ tt_face

FT_Face irr::gui::CGUITTFont::tt_face

private

Referenced by createGlyphPage(), getGlyphIndexByChar(), getKerning(), and load().

◆ use_auto_hinting

bool irr::gui::CGUITTFont::use_auto_hinting

protected

Referenced by setFontHinting(), and useAutoHinting().

◆ use_hinting

bool irr::gui::CGUITTFont::use_hinting

protected

Referenced by setFontHinting(), and useHinting().

◆ use_monochrome

bool irr::gui::CGUITTFont::use_monochrome

protected

Referenced by load(), setMonochrome(), and useMonochrome().

◆ use_transparency

bool irr::gui::CGUITTFont::use_transparency

protected

Referenced by draw(), isTransparent(), load(), and setTransparency().

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

irrlicht_changes/CGUITTFont.h
irrlicht_changes/CGUITTFont.cpp

Public Member Functions

Static Public Member Functions

Protected Attributes

Private Member Functions

Private Attributes

Static Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ ~CGUITTFont()

◆ CGUITTFont()

Member Function Documentation

◆ convertWCharToU32String()

◆ createGlyphPage()

◆ createTextureFromChar()

◆ createTTFont()

◆ draw() [1/2]

◆ draw() [2/2]

◆ getAscender()

◆ getCharacterFromPos() [1/2]

◆ getCharacterFromPos() [2/2]

◆ getDimension() [1/2]

◆ getDimension() [2/2]

◆ getDriver()

◆ getFontSize()

◆ getGlyphIndexByChar()

◆ getHeightFromCharacter()

◆ getKerning() [1/2]

◆ getKerning() [2/2]

◆ getLastGlyphPage()

◆ getLastGlyphPageIndex()

◆ getPageTextureByIndex()

◆ getWidthFromCharacter()

◆ isTransparent()

◆ load()

◆ reset_images()

◆ setBatchLoadSize()

◆ setFallback()

◆ setFontHinting()

◆ setInvisibleCharacters()

◆ setKerningHeight()

◆ setKerningWidth()

◆ setMaxPageTextureSize()

◆ setMonochrome()

◆ setTransparency()

◆ update_glyph_pages()

◆ update_load_flags()

◆ useAutoHinting()

◆ useHinting()

◆ useMonochrome()

Member Data Documentation

◆ batch_load_size

◆ c_faces

◆ c_library

◆ c_libraryLoaded

◆ Driver

◆ fallback

◆ filename

◆ font_metrics

◆ GlobalKerningHeight

◆ GlobalKerningWidth

◆ Glyph_Pages

◆ Glyphs

◆ Invisible

◆ load_flags

◆ max_page_texture_size

◆ shadow_alpha

◆ shadow_offset

◆ size

◆ tt_face

◆ use_auto_hinting

◆ use_hinting

◆ use_monochrome

◆ use_transparency