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94 lines
2.5 KiB
C++
94 lines
2.5 KiB
C++
#ifndef __FTTextureGlyph__
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#define __FTTextureGlyph__
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#include <ft2build.h>
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#include FT_FREETYPE_H
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#include FT_GLYPH_H
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#include "FTGL.h"
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#include "FTGlyph.h"
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/**
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* FTTextureGlyph is a specialisation of FTGlyph for creating texture
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* glyphs.
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*
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* @see FTGlyphContainer
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*
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*/
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class FTGL_EXPORT FTTextureGlyph : public FTGlyph
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{
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public:
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/**
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* Constructor
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*
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* @param glyph The Freetype glyph to be processed
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* @param id The id of the texture that this glyph will be
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* drawn in
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* @param xOffset The x offset into the parent texture to draw
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* this glyph
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* @param yOffset The y offset into the parent texture to draw
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* this glyph
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* @param width The width of the parent texture
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* @param height The height (number of rows) of the parent texture
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*/
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FTTextureGlyph( FT_GlyphSlot glyph, int id, int xOffset, int yOffset, GLsizei width, GLsizei height);
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/**
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* Destructor
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*/
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virtual ~FTTextureGlyph();
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/**
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* Renders this glyph at the current pen position.
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*
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* @param pen The current pen position.
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* @return The advance distance for this glyph.
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*/
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virtual const FTPoint& Render( const FTPoint& pen);
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/**
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* Reset the currently active texture to zero to get into a known state before
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* drawing a string. This is to get round possible threading issues.
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*/
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static void ResetActiveTexture(){ activeTextureID = 0;}
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private:
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/**
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* The width of the glyph 'image'
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*/
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int destWidth;
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/**
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* The height of the glyph 'image'
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*/
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int destHeight;
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/**
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* Vector from the pen position to the topleft corner of the pixmap
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*/
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FTPoint pos;
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/**
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* The texture co-ords of this glyph within the texture.
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*/
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FTPoint uv[2];
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/**
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* The texture index that this glyph is contained in.
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*/
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int glTextureID;
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/**
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* The texture index of the currently active texture
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*
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* We keep track of the currently active texture to try to reduce the number
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* of texture bind operations.
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*/
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static GLint activeTextureID;
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};
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#endif // __FTTextureGlyph__
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