/// <summary>
/// 添加水印
/// </summary>
public void ToWaterMark()
{
string path = (this.SaveWaterMarkImagePath == null) ? this.SourceImagePath : this.SaveWaterMarkImagePath;
string sExt = this.SourceImagePath.Substring(this.SourceImagePath.LastIndexOf(".")).ToLower();
if (this.SourceImagePath.ToString() == string.Empty)
{
throw new NullReferenceException("SourceImagePath is null!");
}
if (!this.CheckValidExt(sExt))
{
throw new ArgumentException("原图片文件格式不正确,支持的格式有[ " + this.AllowExt + " ]", "SourceImagePath");
}
FileStream stream = File.OpenRead(this.SourceImagePath);
Image original = Image.FromStream(stream, true);
stream.Close();
int width = original.Width;
int height = original.Height;
float horizontalResolution = original.HorizontalResolution;
float verticalResolution = original.VerticalResolution;
Bitmap image = new Bitmap(original, width, height);
original.Dispose();
image.SetResolution(72f, 72f);
Graphics graphics = Graphics.FromImage(image);
try
{
if ((this.WaterMarkText != null) && (this.WaterMarkText.Trim().Length > 0))
{
graphics.SmoothingMode = SmoothingMode.AntiAlias;
graphics.DrawImage(image, new Rectangle(0, 0, width, height), 0, 0, width, height, GraphicsUnit.Pixel);
int[] numArray = new int[] { 0x10, 14, 12, 10, 8, 6, 4 };
Font font = null;
SizeF ef = new SizeF(0f, 0f);
for (int i = 0; i < numArray.Length; i++)
{
font = new Font("arial", (float)numArray[i], FontStyle.Bold);
ef = graphics.MeasureString(this.WaterMarkText, font);
if (((ushort)ef.Width) < ((ushort)width))
{
break;
}
}
numArray = null;
float y = (height - ((int)(height * 0.05000000074505806))) - (ef.Height / 2f);
float x = width / 2;
StringFormat format = new StringFormat();
format.Alignment = StringAlignment.Center;
graphics.DrawString(this.WaterMarkText, font, new SolidBrush(Color.FromArgb(0x99, 0, 0, 0)), new PointF(x + 1f, y + 1f), format);
graphics.DrawString(this.WaterMarkText, font, new SolidBrush(Color.FromArgb(0x99, 0xff, 0xff, 0xff)), new PointF(x, y), format);
format.Dispose();
}
}
catch (Exception exception)
{
throw exception;
}
finally
{
graphics.Dispose();
}
if (this.WaterMarkImagePath == null)
{
this.SaveImage(image, path, GetCodecInfo(htmimes[sExt]));
}
else if (this.WaterMarkImagePath.Trim() == string.Empty)
{
this.SaveImage(image, path, GetCodecInfo(htmimes[sExt]));
}
else
{
Image image2 = new Bitmap(this.WaterMarkImagePath);
int num8 = image2.Width;
int num9 = image2.Height;
if ((width < num8) || (height < (num9 * 2)))
{
this.SaveImage(image, this.SourceImagePath, GetCodecInfo(htmimes[sExt]));
}
else
{
int num10;
int num11;
Bitmap bitmap2 = new Bitmap(image);
image.Dispose();
bitmap2.SetResolution(horizontalResolution, verticalResolution);
Graphics graphics2 = Graphics.FromImage(bitmap2);
ImageAttributes imageAttr = new ImageAttributes();
ColorMap map = new ColorMap();
map.OldColor = Color.FromArgb(0xff, 0, 0xff, 0);
map.NewColor = Color.FromArgb(0, 0, 0, 0);
imageAttr.SetRemapTable(new ColorMap[] { map }, ColorAdjustType.Bitmap);
float[][] newColorMatrix = new float[5][];
float[] numArray3 = new float[5];
numArray3[0] = 1f;
newColorMatrix[0] = numArray3;
float[] numArray4 = new float[5];
numArray4[1] = 1f;
newColorMatrix[1] = numArray4;
float[] numArray5 = new float[5];
numArray5[2] = 1f;
newColorMatrix[2] = numArray5;
float[] numArray6 = new float[5];
numArray6[3] = 0.3f;
newColorMatrix[3] = numArray6;
float[] numArray7 = new float[5];
numArray7[4] = 1f;
newColorMatrix[4] = numArray7;
imageAttr.SetColorMatrix(new ColorMatrix(newColorMatrix), ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
this.GetWaterMarkXY(out num10, out num11, width, height, num8, num9);
graphics2.DrawImage(image2, new Rectangle(num10, num11, num8, num9), 0, 0, num8, num9, GraphicsUnit.Pixel, imageAttr);
imageAttr.ClearColorMatrix();
imageAttr.ClearRemapTable();
image2.Dispose();
graphics2.Dispose();
try
{
this.SaveImage(bitmap2, path, GetCodecInfo(htmimes[sExt]));
}
catch (Exception exception2)
{
throw exception2;
}
finally
{
bitmap2.Dispose();
}
}
}
}
