FastVideoDSPlayer/arm9/source/gui/core/NtftFont.h

#pragma once

#define NTFT_SIGNATURE_HEADER         MKTAG('N', 'T', 'F', 'T')
#define NTFT_SIGNATURE_CHARACTER_INFO MKTAG('C', 'I', 'N', 'F')
#define NTFT_SIGNATURE_GLYPH_DATA     MKTAG('G', 'L', 'P', 'D')

struct ntft_header_t
{
    u32 signature;
    u32 fileSize;
    u32 charInfoOffset;
    u32 glyphDataOffset;
};

struct ntft_cinfo_char_t
{
    u32 glyphDataOffset;
    s32 characterBeginOffset;
    u32 characterWidth;
    s32 characterEndOffset;
};

struct ntft_cinfo_t
{
    u32 signature;
    u32 blockSize;
    u32 characterHeight;
    ntft_cinfo_char_t characters[256];
};

struct ntft_gdata_t
{
    uint32_t signature;
    uint32_t blockSize;
    uint32_t glyphDataSize;
    uint8_t glyphData[0];
};

struct ntft_t
{
    const ntft_header_t* header;
    const ntft_cinfo_t* characterInfo;
    const ntft_gdata_t* glyphData;
};

class NtftFont
{
    ntft_t _font;

  public:
    explicit NtftFont(const void* data);

    void MeasureString(const char* text, int& width, int& height) const;
    void CreateStringData(const char* text, u8* dst, int stride) const;
    int GetFontHeight() const
    {
        return _font.characterInfo->characterHeight;
    }

    const ntft_cinfo_char_t* GetCharInfo(unsigned char c) const
    {
        return &_font.characterInfo->characters[c];
    }
};