protected override Glyph GetGlyph(CommandList commandList, char character, ref Vector2 fontSize, bool uploadGpuResources, out Vector2 fixScaling)
{
// Add a safe guard to prevent the system to generate characters too big for the dynamic font cache texture
fontSize.X = Math.Min(fontSize.X, 1024);
fontSize.Y = Math.Min(fontSize.Y, 1024);
// get the character data associated to the provided character and size
var characterData = GetOrCreateCharacterData(fontSize, character);
// generate the bitmap if it does not exist
if (characterData.Bitmap == null)
{
FontManager.GenerateBitmap(characterData, false);
}
// upload the character to the GPU font texture and create the glyph if does not exists
if (uploadGpuResources && characterData.Bitmap != null && !characterData.IsBitmapUploaded)
{
FontCacheManager.UploadCharacterBitmap(commandList, characterData);
}
// update the character usage info
FontCacheManager.NotifyCharacterUtilization(characterData);
fixScaling = fontSize / characterData.Size;
return(characterData.Glyph);
}
/// <summary>
/// Load this system.
/// </summary>
/// <param name="graphicsDevice">The graphics device.</param>
/// <exception cref="System.ArgumentNullException">graphicsDevice</exception>
public void Load(GraphicsDevice graphicsDevice, IDatabaseFileProviderService fileProviderService)
{
// TODO possibly load cached character bitmaps from the disk
if (graphicsDevice == null)
{
throw new ArgumentNullException("graphicsDevice");
}
GraphicsDevice = graphicsDevice;
FontManager = new FontManager(fileProviderService);
FontCacheManager = new FontCacheManager(this);
}
