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SoGlyph

NAME

SoGlyph -

SYNOPSIS

#include <Inventor/misc/SoGlyph.h>

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

Public Types

enum Fonttype { FONT2D = 1, FONT3D = 2 }

Public Member Functions

void unref (void) const

const SbVec2f * getCoords (void) const

const int * getFaceIndices (void) const

const int * getEdgeIndices (void) const

const int * getNextCWEdge (const int edgeidx) const

const int * getNextCCWEdge (const int edgeidx) const

float getWidth (void) const

const SbBox2f & getBoundingBox (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 SoGlyph * getGlyph (const char character, const SbName &font)

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

Protected Member Functions

SoGlyph (void)

~SoGlyph ()

void setCoords (SbVec2f *coords, int numcoords=-1)

void setFaceIndices (int *indices, int numindices=-1)

void setEdgeIndices (int *indices, int numindices=-1)

Friends

class SoGlyphP

Constructor & Destructor Documentation

SoGlyph::SoGlyph (void) [protected]

Constructor.

Referenced by getGlyph().

SoGlyph::~SoGlyph () [protected]

Destructor.

Member Function Documentation

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.

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

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

References SbList< Type >::append(), SbList< Type >::getLength(), setCoords(), setEdgeIndices(), and setFaceIndices().

const SbVec2f * SoGlyph::getCoords (void) const

Returns coordinates for this glyph.

const int * SoGlyph::getFaceIndices (void) const

Returns face indices for this glyph.

const int * SoGlyph::getEdgeIndices (void) const

Returns edge indices for this glyph.

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

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

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

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

float SoGlyph::getWidth (void) const

Convenience method which returns the exact width of the glyph.

References getBoundingBox(), SbBox2f::getMax(), and SbBox2f::getMin().

const SbBox2f & SoGlyph::getBoundingBox (void) const

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

Referenced by getWidth().

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))

References SbList< Type >::append(), SbList< Type >::getLength(), SbString::getString(), SbName::getString(), and SoGlyph().

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.

void SoGlyph::setCoords (SbVec2f * coords, int numcoords = -1) [protected]

Sets the coordinates for this glyph.

Referenced by getGlyph().

void SoGlyph::setFaceIndices (int * indices, int numindices = -1) [protected]

Sets the face indices for this glyph.

Referenced by getGlyph().

void SoGlyph::setEdgeIndices (int * indices, int numindices = -1) [protected]

Sets the edge indices for this glyph.

Referenced by getGlyph().

Author

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