font.h

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/*****************************************************************************************
 * SGCT                                                                                  *
 * Simple Graphics Cluster Toolkit                                                       *
 *                                                                                       *
 * Copyright (c) 2012-2026                                                               *
 * For conditions of distribution and use, see copyright notice in LICENSE.md            *
 ****************************************************************************************/
 
#ifndef __SGCT__FONT__H__
#define __SGCT__FONT__H__
 
#ifdef SGCT_HAS_TEXT
 
#include <sgct/sgctexports.h>
 
#include <sgct/math.h>
#include <unordered_map>
 
typedef struct FT_LibraryRec_* FT_Library;
typedef struct FT_GlyphRec_* FT_Glyph;
typedef struct FT_FaceRec_* FT_Face;
typedef signed long FT_Fixed;
 
namespace sgct::text {

class SGCT_EXPORT Font {
public:
    struct FontFaceData {
        unsigned int texId = 0;
        float distToNextChar = 0.f;
        vec2 pos = vec2{ 0.f, 0.f };
        vec2 size = vec2{ 0.f, 0.f };
        FT_Glyph glyph = nullptr;
    };

    Font(FT_Library lib, FT_Face face, unsigned int height);

    ~Font();

    const Font::FontFaceData& fontFaceData(char c);

    unsigned int vao() const;

    float height() const;

    void setStrokeSize(int size);
 
private:
    void createCharacter(char c);
 
    const FT_Library _library;
    const FT_Face _face;
    FT_Fixed _strokeSize = 1;
    const float _height;
    std::unordered_map<char, FontFaceData> _fontFaceData;
    unsigned int _vao = 0;
    unsigned int _vbo = 0;
};
 
} // namespace sgct
 
#endif // SGCT_HAS_TEXT
#endif // __SGCT__FONT__H__