#ifndef AMR_FONTS_H
#define AMR_FONTS_H

typedef struct amr_glyph_info {
  u32 charset_start_index;
  u32 charset_end_index;
} amr_glyph_info;

typedef struct amr_font_details_debug {
  i32 advance;
  i32 lsb;
  i32 x0, y0, x1, y1;
  i32 kern;
  f32 lx;
  f32 ly;
  i32 byte_offset;
  i32 baseline;
} debug_font_details;

typedef struct amr_font_state_debug {
  stbtt_fontinfo font_info;
} amr_font_state;
// initialise a font and loads the font in the fontbuffer
// input: 
// - font path
// - font buffer, must be initialised by caller
// - size of the font file, must be known beforehand
// output:
// - error code
u32 amr_InitFont(const u8 *FontPath, u8 *FontBuffer, u32 FontFz); 
u32 amr_GetGlyphIdFromCodepoint(amr_glyph_info glyph, u32 *GlyphIndexArray, u32 Codepoint);

u32 amr_InitFont(stbtt_fontinfo *font_info, const char *FontPath, u8 *FontBuffer, u32 FontSz)
{
  PlatformDebugFileRead(FontPath, FontBuffer, FontSz);
  if (!stbtt_InitFont(font_info, FontBuffer, 0))
  {
    printf("ERROR: failed to read arial font");
    assert(1 == 0);
  }

  return 0;
}

u32 amr_GetGlyphIdFromCodepoint(amr_glyph_info glyph, u32 *GlyphIndexArray, u32 Codepoint)
{
  u32 glyph_id = *(GlyphIndexArray + (Codepoint - glyph.charset_start_index));
  return glyph_id;
}

#endif