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SoGlyph Class Reference

The SoGlyph class is used to generate and reuse font glyph bitmaps and outlines. More...

#include <Inventor/misc/SoGlyph.h>

Public Types

enum  Fonttype { FONT2D = 1, FONT3D = 2 }
 

Public Member Functions

void unref (void) const
 
const SbVec2fgetCoords (void) const
 
const intgetFaceIndices (void) const
 
const intgetEdgeIndices (void) const
 
const intgetNextCWEdge (const int edgeidx) const
 
const intgetNextCCWEdge (const int edgeidx) const
 
float getWidth (void) const
 
const SbBox2fgetBoundingBox (void) const
 
SbVec2s getAdvance (void) const
 
SbVec2s getKerning (const SoGlyph &rightglyph) const
 
unsigned char * getBitmap (SbVec2s &size, SbVec2s &pos, const SbBool antialiased) const
 

Static Public Member Functions

static const SoGlyphgetGlyph (const char character, const SbName &font)
 
static const SoGlyphgetGlyph (SoState *state, const unsigned int character, const SbVec2s &size, const float angle)
 

Protected Member Functions

 SoGlyph (void)
 
 ~SoGlyph ()
 
void setCoords (const SbVec2f *coords, int numcoords=-1)
 
void setFaceIndices (const int *indices, int numindices=-1)
 
void setEdgeIndices (const int *indices, int numindices=-1)
 

Detailed Description

The SoGlyph class is used to generate and reuse font glyph bitmaps and outlines.

This class is now obsolete, and will be removed from a later version of Coin.

SoGlyph is the public interface all text nodes (both built-in and extensions) should use to generate bitmaps and outlines for font glyphs. It maintains an internal cache of previously requested glyphs to avoid needless calls into the font library.

Primer: a glyph is the graphical representation of a given character of a given font at a given size and orientation. It can be either a bitmap (pixel aligned with the viewport) or an outline (polygonal representation) that can be transformed or extruded like any other 3D geometry. Bitmaps are used by SoText2, while the other text nodes uses outlines.

Be aware that this class is an extension for Coin, and it is not available in the original SGI Open Inventor v2.1 API.

Since
Coin 2.0
See also
SoText2, SoText3, SoAsciiText

Constructor & Destructor Documentation

◆ SoGlyph()

SoGlyph::SoGlyph ( void  )
protected

Constructor.

◆ ~SoGlyph()

SoGlyph::~SoGlyph ( )
protected

Destructor.

Member Function Documentation

◆ unref()

void SoGlyph::unref ( void  ) const

Should be called when a node no longer will use a glyph. Will free memory used by this glyph when it is no longer used by any node.

◆ getGlyph() [1/2]

const SoGlyph * SoGlyph::getGlyph ( const char  character,
const SbName font 
)
static

Returns a character of the specified font, suitable for polygonal rendering.

◆ getCoords()

const SbVec2f * SoGlyph::getCoords ( void  ) const

Returns coordinates for this glyph.

◆ getFaceIndices()

const int * SoGlyph::getFaceIndices ( void  ) const

Returns face indices for this glyph.

◆ getEdgeIndices()

const int * SoGlyph::getEdgeIndices ( void  ) const

Returns edge indices for this glyph.

◆ getNextCWEdge()

const int * SoGlyph::getNextCWEdge ( const int  edgeidx) const

Returns a pointer to the next clockwise edge. Returns NULL if none could be found.

◆ getNextCCWEdge()

const int * SoGlyph::getNextCCWEdge ( const int  edgeidx) const

Returns a pointer to the next counter clockwise edge. NULL if none could be found.

◆ getWidth()

float SoGlyph::getWidth ( void  ) const

Convenience method which returns the exact width of the glyph.

◆ getBoundingBox()

const SbBox2f & SoGlyph::getBoundingBox ( void  ) const

Returns the bounding box of this glyph. This value is cached for performance.

◆ getGlyph() [2/2]

const SoGlyph * SoGlyph::getGlyph ( SoState state,
const unsigned int  character,
const SbVec2s size,
const float  angle 
)
static

Returns a character of the specified font, suitable for bitmap rendering. The size parameter overrides state's SoFontSizeElement (if != SbVec2s(0,0))

◆ getBitmap()

unsigned char * SoGlyph::getBitmap ( SbVec2s size,
SbVec2s pos,
const SbBool  antialiased 
) const

Bitmap for glyph. size and pos are return parameters. Antialiased bitmap graphics not yet supported.

Note that this function may return NULL if the glyph has no visible pixels (as for e.g. the space character).

The returned buffer should not be deallocated by the caller.

◆ setCoords()

void SoGlyph::setCoords ( const SbVec2f coords,
int  numcoords = -1 
)
protected

Sets the coordinates for this glyph.

◆ setFaceIndices()

void SoGlyph::setFaceIndices ( const int indices,
int  numindices = -1 
)
protected

Sets the face indices for this glyph.

◆ setEdgeIndices()

void SoGlyph::setEdgeIndices ( const int indices,
int  numindices = -1 
)
protected

Sets the edge indices for this glyph.


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