private async Task <string> CreateBadge(CancellationToken token)
{
//Get the badge icon
IImage badgeIcon = null;
if (_mode == Mode.File)
{
badgeIcon = await _canvasService.GetImage(FileIcon, token);
}
else if (_mode == Mode.Svg)
{
badgeIcon = await _canvasService.GetSvgImage(SvgIcon, SvgWidth, SvgHeight, token);
}
if (badgeIcon == null)
{
return(null);
}
token.ThrowIfCancellationRequested();
IImageCanvas canvas = null;
if (IsBadgeVisible)
{
//InitializeCache frames
var font = new Font(null, BadgeFontSize);
var metrics = _canvasService.MeasureText(BadgeCount.ToString(), font);
var textSize = metrics.Size;
var badgeSize = new Size(BadgePadding.Left + BadgePadding.Right + textSize.Width,
BadgePadding.Top + BadgePadding.Bottom + textSize.Height);
var canvasSize = new Size(badgeIcon.Size.Width + badgeSize.Width - BadgeInsets.Width,
badgeIcon.Size.Height + badgeSize.Height - BadgeInsets.Height);
//Create canvas
canvas = _canvasService.GetCanvas(canvasSize);
token.ThrowIfCancellationRequested();
//Draw icon
var imageFrame = new Rect(0, badgeSize.Height - BadgeInsets.Height, badgeIcon.Size.Width,
badgeIcon.Size.Height);
canvas.DrawImage(badgeIcon, imageFrame);
token.ThrowIfCancellationRequested();
//Draw the badge rounded rect
var badgeFrame = new Rect(badgeIcon.Size.Width - BadgeInsets.Width, 0, badgeSize.Width,
badgeSize.Height);
var color = GetColor(BadgeColor);
var badgeImage = _canvasService.GetRoundedImage(badgeFrame.Size, color, BadgeRadius);
canvas.DrawImage(badgeImage, badgeFrame);
token.ThrowIfCancellationRequested();
//Draw badge text
var textFrame = new Rect(badgeFrame.X + BadgePadding.Left,
badgeFrame.Y + BadgePadding.Top + metrics.Ascent, textSize.Width, textSize.Height);
canvas.DrawText(BadgeCount.ToString(), textFrame, font, TextAlignment.Center,
GetColor(BadgeTextColor));
}
else
{
//Create canvas
canvas = _canvasService.GetCanvas(badgeIcon.Size);
token.ThrowIfCancellationRequested();
//Draw icon
var imageFrame = new Rect(0, 0, badgeIcon.Size.Width, badgeIcon.Size.Height);
canvas.DrawImage(badgeIcon, imageFrame);
}
token.ThrowIfCancellationRequested();
//Get the result image
var image = canvas.GetImage();
//Save the image to cache
var filename = GetBadgeCacheFileName();
var path = PortablePath.Combine(_cacheFolder.Path, filename);
await _canvasService.SaveImage(image, _cacheFolder.Path, filename, token);
return(path);
}
