public static BitmapSource RenderBitmap(string text, double font_size, Brush brush)
{
// If the cache is too large, remove the first element repeatedly until it’s OK.
while (m_cache.Count >= MaxCachedBitmaps || m_cached_pixels >= MaxCachedPixels)
{
var it = m_cache.GetEnumerator();
it.MoveNext();
m_cached_pixels -= ((RenderKey)it.Key).Pixels;
m_cache.RemoveAt(0);
}
// Query the cache for this bitmap and render it if not found
BitmapSource ret;
var key = new RenderKey()
{
Text = text, FontSize = font_size, Foreground = brush
};
if (m_cache.Contains(key))
{
ret = m_cache[key] as BitmapSource;
m_cache.Remove(key);
m_cache[key] = ret;
++m_cache_hits;
}
else
{
m_cache[key] = ret = RenderBitmapInternal(text, font_size, brush);
m_cached_pixels += key.Pixels;
++m_cache_misses;
}
return(ret);
}
public static BitmapSource RenderBitmap(string text, double font_size)
{
var key = new RenderKey()
{
Text = text, FontSize = font_size
};
if (!m_cache.TryGetValue(key, out var ret))
{
m_cache[key] = ret = RenderBitmapInternal(text, font_size);
}
return(ret);
}
