/// <summary>
/// 对图片添加文字水印
/// </summary>
/// <param name="sourcefile">图片源路径</param>
/// <param name="watermarkText">水印文字</param>
/// <param name="desfile">图片目的路径</param>
public static Stream AddImgWaterMark(string sourcefile, string watermarkText)
{
try
{
Stream stream = new MemoryStream(System.IO.File.ReadAllBytes(sourcefile));
System.Drawing.Image img = System.Drawing.Image.FromStream(stream);
//System.Drawing.Image img = System.Drawing.Image.FromFile(sourcefile);
Graphics gr = Graphics.FromImage(img);
System.Drawing.Font font = new System.Drawing.Font("Tahoma", (float)40, FontStyle.Bold, GraphicsUnit.Pixel);
Color color = Color.FromArgb(20, Color.Gray);//241, 235, 105 Color.Silver
double tangent = (double)img.Height / (double)img.Width;
double angle = Math.Atan(tangent) * (180 / Math.PI);
double halfHypotenuse = Math.Sqrt((img.Height * img.Height) + (img.Width * img.Width)) / 2;
double sin, cos, opp1, adj1, opp2, adj2;
for (int i = 100; i > 0; i--)
{
font = new System.Drawing.Font("Tahoma", i, FontStyle.Bold);
SizeF sizef = gr.MeasureString(watermarkText, font, int.MaxValue);
sin = Math.Sin(angle * (Math.PI / 180));
cos = Math.Cos(angle * (Math.PI / 180));
opp1 = sin * sizef.Width;
adj1 = cos * sizef.Height;
opp2 = sin * sizef.Height;
adj2 = cos * sizef.Width;
if (opp1 + adj1 < img.Height && opp2 + adj2 < img.Width)
{
break;
}
}
StringFormat stringFormat = new StringFormat();
stringFormat.Alignment = StringAlignment.Center;
stringFormat.LineAlignment = StringAlignment.Center;
gr.SmoothingMode = SmoothingMode.AntiAlias;
gr.RotateTransform((float)angle);
gr.DrawString(watermarkText, font, new SolidBrush(color), new Point((int)halfHypotenuse, 0), stringFormat);
try
{
return(img.ToStream(ImageFormat.Jpeg));
}
finally
{
if (img != null)
{
img.Dispose();
img = null;
}
}
}
catch (Exception ex)
{
WriteLog(string.Format("{0},{1}", ex.Message, ex.StackTrace));
}
return(new MemoryStream(System.IO.File.ReadAllBytes(sourcefile)));
}
public void UploadImage(Image image, string blobLocation)
{
using (var stream = image.ToStream(ImageFormat.Jpeg))
{
var blob = _container.GetBlockBlobReference(blobLocation);
blob.UploadFromStream(stream);
}
}
private async Task SendImageResultAsync(Image image)
{
await Context.Channel.SendFileAsync(
image.ToStream(ImageFormat.Png), $"Loadout{Context.User.Username}.png",
$"パイロット {Context.User.Username} の推奨装備です。");
}
