font fallback_font(font aFont) const
{
if (!use_fallback())
return aFont;
else
{
font fallbackFont = aFont.fallback();
for (uint8_t i = 0; i < iFallbackIndex; ++i)
fallbackFont = fallbackFont.fallback();
return fallbackFont;
}
}
static neogfx::size extents(const font& aFont, const_iterator aBegin, const_iterator aEnd)
{
neogfx::size result;
bool usingNormal = false;
bool usingFallback = false;
for (glyph_text::const_iterator i = aBegin; i != aEnd; ++i)
{
result.cx += i->advance().cx;
if (!i->use_fallback())
usingNormal = true;
else
usingFallback = true;
}
if (usingNormal || !usingFallback)
result.cy = aFont.height();
if (usingFallback)
result.cy = std::max(result.cy, aFont.fallback().height());
return neogfx::size(std::ceil(result.cx), std::ceil(result.cy));
}
