#ifndef MGL_FONT_H
#define MGL_FONT_H

#include "../system/fileutils.h"
#include "font_char_map.h"
#include "texture.h"
#include <stdint.h>

typedef struct mgl_memory_mapped_file mgl_memory_mapped_file;
typedef struct mgl_font mgl_font;

typedef enum {
    MGL_ATLAS_SECTION_INITIAL,
    MGL_ATLAS_SECTION_RIGHT,
    MGL_ATLAS_SECTION_BOTTOM
} mgl_font_atlas_render_section;

typedef struct {
    int width;
    int height;
    int prev_width;
    int prev_height;
    mgl_vec2i pointer_position;
    mgl_font_atlas_render_section render_section;
    int initial_section_height;
    int right_section_height;
} mgl_font_atlas;

struct mgl_font {
    /* Font texture coordinates are in pixel space. Note: the texture id may change */
    mgl_texture texture;
    mgl_font_atlas font_atlas;
    unsigned int character_size;
    int ascent;
    int descent;
    int linegap;
    int max_glyph_height;
    mgl_font_char_map char_map;
    int current_line_max_height;
    void *font_info;
};

int mgl_font_load_from_file(mgl_font *self, const mgl_memory_mapped_file *mapped_file, unsigned int character_size);
void mgl_font_unload(mgl_font *self);

/* Note: loads the glyph if it hasn't been loaded yet */
int mgl_font_get_glyph(mgl_font *self, uint32_t codepoint, mgl_font_glyph *glyph);

/* Returns the kerning */
float mgl_font_get_kerning(const mgl_font *self, uint32_t prev_codepoint, uint32_t codepoint);

#endif /* MGL_FONT_H */