Function LoadTTFInternal

engine/font/src/font_ttf.cpp:215–266

#endif

static HFont LoadTTFInternal(const char* path, const void* buffer, uint32_t buffer_size, bool allocate)
{
    TTFFont* font = new TTFFont;
    memset(font, 0, sizeof(*font));

    font->m_Base.m_LoadFontFromMemory = FontLoadFromMemoryTTF;
    font->m_Base.m_DestroyFont = FontDestroyTTF;
    font->m_Base.m_GetResourceSize = GetResourceSizeTTF;
    font->m_Base.m_GetScaleFromSize = GetScaleFromSizeTTF;
    font->m_Base.m_GetAscent = GetAscentTTF;
    font->m_Base.m_GetDescent = GetDescentTTF;
    font->m_Base.m_GetLineGap = GetLineGapTTF;
    font->m_Base.m_GetGlyphIndex = GetGlyphIndexTTF;
    font->m_Base.m_GetGlyph = GetGlyphTTF;
    font->m_Base.m_FreeGlyph = FreeGlyphTTF;

    if (allocate)
    {
        font->m_DataSize = buffer_size;
        font->m_Data     = (const void*)malloc(buffer_size);
        memcpy((void*)font->m_Data, buffer, buffer_size);
        font->m_Allocated = 1;
    }
    else
    {
        font->m_Data    = buffer;
        font->m_DataSize= buffer_size;
    }

#if defined(FONT_USE_HARFBUZZ)
    if (!LoadHBFont(font, (void*)font->m_Data, font->m_DataSize))
    {
        dmLogError("Failed to create Harfbuzz font from '%s'", path);
        FontDestroyTTF((HFont)font);
        delete font;
        return 0;
    }
#endif

    int index = stbtt_GetFontOffsetForIndex((const unsigned char*)font->m_Data,0);
    int result = stbtt_InitFont(&font->m_Font, (const unsigned char*)font->m_Data, index);
    if (!result)
    {
        dmLogError("Failed to load font from '%s'", path);
        FontDestroyTTF((HFont)font);
        delete font;
        return 0;
    }

    stbtt_GetFontVMetrics(&font->m_Font, &font->m_Ascent, &font->m_Descent, &font->m_LineGap);
    return (HFont)font;
}

#if defined(FONT_USE_HARFBUZZ)
hb_font_t* FontGetHarfbuzzFontFromTTF(HFont hfont)