public static void DrawAsBitmap(SKCanvas canvas, LabelStyle style, IFeature feature, float x, float y, float layerOpacity)
{
var text = style.GetLabelText(feature);
var key = text + "_" + style.Font.FontFamily + "_" + style.Font.Size + "_" + (float)style.Font.Size + "_" +
style.BackColor + "_" + style.ForeColor;
if (!LabelCache.Keys.Contains(key))
{
LabelCache[key] = new BitmapInfo {
Bitmap = CreateLabelAsBitmap(style, text, layerOpacity)
}
}
;
var info = LabelCache[key];
BitmapHelper.RenderBitmap(canvas, info.Bitmap, (int)Math.Round(x), (int)Math.Round(y),
offsetX: (float)style.Offset.X, offsetY: (float)-style.Offset.Y,
horizontalAlignment: style.HorizontalAlignment, verticalAlignment: style.VerticalAlignment);
}
private static void DrawContent(CalloutStyle callout, SKCanvas canvas, BitmapInfo bitmapInfo)
{
// Draw content
if (callout.Content >= 0)
{
var strokeWidth = callout.StrokeWidth < 1 ? 1 : callout.StrokeWidth;
var offsetX = callout.ShadowWidth + strokeWidth * 2 + (callout.Padding.Left < callout.RectRadius * 0.5 ? callout.RectRadius * 0.5f : (float)callout.Padding.Left);
var offsetY = callout.ShadowWidth + strokeWidth * 2 + (callout.Padding.Top < callout.RectRadius * 0.5 ? callout.RectRadius * 0.5f : (float)callout.Padding.Top);
switch (callout.ArrowAlignment)
{
case ArrowAlignment.Left:
offsetX += callout.ArrowHeight;
break;
case ArrowAlignment.Top:
offsetY += callout.ArrowHeight;
break;
}
var offset = new SKPoint(offsetX, offsetY);
switch (bitmapInfo.Type)
{
case BitmapType.Bitmap:
canvas.DrawImage(bitmapInfo.Bitmap, offset);
break;
case BitmapType.Sprite:
throw new Exception();
case BitmapType.Svg:
canvas.DrawPicture(bitmapInfo.Svg.Picture, offset);
break;
}
}
}
