FTTextureGlyph Class Reference

#include <FTTextureGlyph.h>

Inheritance diagram for FTTextureGlyph:

List of all members.

Public Member Functions
	FTTextureGlyph (FT_GlyphSlot glyph, int id, int xOffset, int yOffset, GLsizei width, GLsizei height)
virtual	~FTTextureGlyph ()
virtual const FTPoint &	Render (const FTPoint &pen)
	FTTextureGlyph (FT_GlyphSlot glyph, int id, int xOffset, int yOffset, GLsizei width, GLsizei height)
virtual	~FTTextureGlyph ()
virtual const FTPoint &	Render (const FTPoint &pen)
Static Public Member Functions
static void	ResetActiveTexture ()
static void	ResetActiveTexture ()
Private Attributes
int	destWidth
int	destHeight
FTPoint	pos
FTPoint	uv [2]
int	glTextureID
Static Private Attributes
static GLint	activeTextureID

---

Detailed Description

FTTextureGlyph is a specialisation of FTGlyph for creating texture glyphs.

See also:

FTGlyphContainer

Definition at line 20 of file FTTextureGlyph.h.

---

Constructor & Destructor Documentation

FTTextureGlyph::FTTextureGlyph	(	FT_GlyphSlot	glyph,
		int	id,
		int	xOffset,
		int	yOffset,
		GLsizei	width,
		GLsizei	height
	)

Constructor

Parameters:

	glyph	The Freetype glyph to be processed
	id	The id of the texture that this glyph will be drawn in
	xOffset	The x offset into the parent texture to draw this glyph
	yOffset	The y offset into the parent texture to draw this glyph
	width	The width of the parent texture
	height	The height (number of rows) of the parent texture

Definition at line 5 of file FTTextureGlyph.cxx.

References FT_GlyphSlotRec_::bitmap, FT_GlyphSlotRec_::bitmap_left, FT_GlyphSlotRec_::bitmap_top, FT_Bitmap_::buffer, destHeight, destWidth, FTGlyph::err, FT_GlyphSlotRec_::format, ft_glyph_format_bitmap, FT_Render_Glyph(), FT_RENDER_MODE_NORMAL, GL_ALPHA, GL_CLIENT_PIXEL_STORE_BIT, GL_FALSE, GL_TEXTURE_2D, GL_UNPACK_ALIGNMENT, GL_UNPACK_LSB_FIRST, GL_UNPACK_ROW_LENGTH, GL_UNSIGNED_BYTE, glBindTexture(), glPixelStorei(), glPopClientAttrib(), glPushClientAttrib(), glTexSubImage2D(), glTextureID, pos, FT_Bitmap_::rows, uv, FT_Bitmap_::width, FTPoint::X(), and FTPoint::Y().

FTTextureGlyph::~FTTextureGlyph

(

)

[virtual]

Destructor

Definition at line 54 of file FTTextureGlyph.cxx.

FTTextureGlyph::FTTextureGlyph	(	FT_GlyphSlot	glyph,
		int	id,
		int	xOffset,
		int	yOffset,
		GLsizei	width,
		GLsizei	height
	)

Constructor

Parameters:

	glyph	The Freetype glyph to be processed
	id	The id of the texture that this glyph will be drawn in
	xOffset	The x offset into the parent texture to draw this glyph
	yOffset	The y offset into the parent texture to draw this glyph
	width	The width of the parent texture
	height	The height (number of rows) of the parent texture

virtual FTTextureGlyph::~FTTextureGlyph

(

)

[virtual]

Destructor

---

Member Function Documentation

const FTPoint & FTTextureGlyph::Render

(

const FTPoint &

pen

)

[virtual]

Renders this glyph at the current pen position.

Parameters:

pen

The current pen position.

Returns:

The advance distance for this glyph.

Implements FTGlyph.

Definition at line 58 of file FTTextureGlyph.cxx.

References activeTextureID, FTGlyph::advance, destHeight, destWidth, GL_QUADS, GL_TEXTURE_2D, glBegin(), glBindTexture(), glEnd(), glTexCoord2f(), glTextureID, glTranslatef(), glVertex2f(), pos, uv, FTPoint::X(), X, Y, and FTPoint::Y().

static void FTTextureGlyph::ResetActiveTexture

(

)

[inline, static]

Reset the currently active texture to zero to get into a known state before drawing a string. This is to get round possible threading issues.

Definition at line 55 of file FTTextureGlyph.h.

Referenced by FTGLTextureFont::PreRender().

virtual const FTPoint& FTTextureGlyph::Render

(

const FTPoint &

pen

)

[virtual]

Renders this glyph at the current pen position.

Parameters:

pen

The current pen position.

Returns:

The advance distance for this glyph.

Implements FTGlyph.

static void FTTextureGlyph::ResetActiveTexture

(

)

[inline, static]

Reset the currently active texture to zero to get into a known state before drawing a string. This is to get round possible threading issues.

Definition at line 55 of file FTTextureGlyph.h.

---

Member Data Documentation

int FTTextureGlyph::destWidth [private]

The width of the glyph 'image'

Definition at line 61 of file FTTextureGlyph.h.

Referenced by FTTextureGlyph(), and Render().

int FTTextureGlyph::destHeight [private]

The height of the glyph 'image'

Definition at line 66 of file FTTextureGlyph.h.

Referenced by FTTextureGlyph(), and Render().

FTPoint FTTextureGlyph::pos [private]

Vector from the pen position to the topleft corner of the pixmap

Definition at line 71 of file FTTextureGlyph.h.

Referenced by FTTextureGlyph(), and Render().

FTPoint FTTextureGlyph::uv [private]

The texture co-ords of this glyph within the texture.

Definition at line 76 of file FTTextureGlyph.h.

Referenced by FTTextureGlyph(), and Render().

int FTTextureGlyph::glTextureID [private]

The texture index that this glyph is contained in.

Definition at line 81 of file FTTextureGlyph.h.

Referenced by FTTextureGlyph(), and Render().

static GLint FTTextureGlyph::activeTextureID [static, private]

The texture index of the currently active texture

We keep track of the currently active texture to try to reduce the number of texture bind operations.

Definition at line 89 of file FTTextureGlyph.h.

Referenced by Render().

---

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

• graf3d/ftgl/inc/FTTextureGlyph.h
• include/FTTextureGlyph.h
• graf3d/ftgl/src/FTTextureGlyph.cxx

---