OVRFW::GlProgram glProgram;

GLuint VAO;

GLuint VBO;

GLfloat vertices[6 * 100][4];

static FT_Library ft;

struct Character {

glm::fvec4 Position; // the position of the character inside of the texture

glm::ivec2 Size; // size of glyph

glm::ivec2 Bearing; // offset from baseline to left/top of glyph

GLuint Advance; // offset to advance to next glyph

};

struct RenderFont {

int FontSize;

int offsetY;

int PHeight;

int PStart;

GLuint textureID;

std::map<GLchar, Character> Characters;

};

FontManager();

void Free();

FontManager(FontManager&) = delete;

FontManager(FontManager&&) = delete;

FontManager &operator=(FontManager&) = delete;

FontManager &operator=(FontManager&&) = delete;

void Init(glm::mat4 projection);

static void CloseFontLoader();

void Begin();

void RenderText(RenderFont font, std::string text, GLfloat x, GLfloat y, GLfloat scale, ovrVector4f color, float transparency);

void RenderFontTexture(FontManager::RenderFont font, ovrVector4f color, float transparency);

void End();

static int GetWidth(RenderFont font, std::string text);

static void LoadFont(RenderFont *font, const char *filePath, uint fontSize);

static void LoadFontFromAssets(OVRFW::ovrFileSys *fileSys, RenderFont *font, const char *filePath, uint fontSize);

static void LoadFont(RenderFont *font, FT_Face face, uint fontSize);