Exemplo n.º 1
0
        /// <summary>
        /// 图片水印
        /// </summary>
        /// <param name="imgPath">服务器图片相对路径</param>
        /// <param name="filename">保存文件名</param>
        /// <param name="watermarkFilename">水印文件相对路径</param>
        /// <param name="watermarkStatus">图片水印位置 0=不使用 1=左上 2=中上 3=右上 4=左中  9=右下</param>
        /// <param name="quality">附加水印图片质量,0-100</param>
        /// <param name="watermarkTransparency">水印的透明度 1--10 10为不透明</param>
        public static void AddImageSignPic(string imgPath, string filename, string watermarkFilename, int watermarkStatus, int quality, int watermarkTransparency)
        {
            if (!File.Exists(IOHelper.GetMapPath(imgPath)))
            {
                return;
            }
            byte[] _ImageBytes = File.ReadAllBytes(IOHelper.GetMapPath(imgPath));
            Image  img         = Image.FromStream(new System.IO.MemoryStream(_ImageBytes));

            filename = IOHelper.GetMapPath(filename);

            if (watermarkFilename.StartsWith("/") == false)
            {
                watermarkFilename = "/" + watermarkFilename;
            }
            watermarkFilename = IOHelper.GetMapPath(watermarkFilename);
            if (!File.Exists(watermarkFilename))
            {
                return;
            }
            Graphics g = Graphics.FromImage(img);
            //设置高质量插值法
            //g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
            //设置高质量,低速度呈现平滑程度
            //g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
            Image watermark = new Bitmap(watermarkFilename);

            if (watermark.Height >= img.Height || watermark.Width >= img.Width)
            {
                return;
            }

            ImageAttributes imageAttributes = new ImageAttributes();
            ColorMap        colorMap        = new ColorMap();

            colorMap.OldColor = Color.FromArgb(255, 0, 255, 0);
            colorMap.NewColor = Color.FromArgb(0, 0, 0, 0);
            ColorMap[] remapTable = { colorMap };

            imageAttributes.SetRemapTable(remapTable, ColorAdjustType.Bitmap);

            float transparency = 0.5F;

            if (watermarkTransparency >= 1 && watermarkTransparency <= 10)
            {
                transparency = (watermarkTransparency / 10.0F);
            }


            float[][] colorMatrixElements =
            {
                new float[] { 1.0f, 0.0f, 0.0f,         0.0f, 0.0f },
                new float[] { 0.0f, 1.0f, 0.0f,         0.0f, 0.0f },
                new float[] { 0.0f, 0.0f, 1.0f,         0.0f, 0.0f },
                new float[] { 0.0f, 0.0f, 0.0f, transparency, 0.0f },
                new float[] { 0.0f, 0.0f, 0.0f,         0.0f, 1.0f }
            };

            ColorMatrix colorMatrix = new ColorMatrix(colorMatrixElements);

            imageAttributes.SetColorMatrix(colorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);

            int xpos = 0;
            int ypos = 0;

            switch (watermarkStatus)
            {
            case 1:
                xpos = (int)(img.Width * (float).01);
                ypos = (int)(img.Height * (float).01);
                break;

            case 2:
                xpos = (int)((img.Width * (float).50) - (watermark.Width / 2));
                ypos = (int)(img.Height * (float).01);
                break;

            case 3:
                xpos = (int)((img.Width * (float).99) - (watermark.Width));
                ypos = (int)(img.Height * (float).01);
                break;

            case 4:
                xpos = (int)(img.Width * (float).01);
                ypos = (int)((img.Height * (float).50) - (watermark.Height / 2));
                break;

            case 5:
                xpos = (int)((img.Width * (float).50) - (watermark.Width / 2));
                ypos = (int)((img.Height * (float).50) - (watermark.Height / 2));
                break;

            case 6:
                xpos = (int)((img.Width * (float).99) - (watermark.Width));
                ypos = (int)((img.Height * (float).50) - (watermark.Height / 2));
                break;

            case 7:
                xpos = (int)(img.Width * (float).01);
                ypos = (int)((img.Height * (float).99) - watermark.Height);
                break;

            case 8:
                xpos = (int)((img.Width * (float).50) - (watermark.Width / 2));
                ypos = (int)((img.Height * (float).99) - watermark.Height);
                break;

            case 9:
                xpos = (int)((img.Width * (float).99) - (watermark.Width));
                ypos = (int)((img.Height * (float).99) - watermark.Height);
                break;
            }

            g.DrawImage(watermark, new Rectangle(xpos, ypos, watermark.Width, watermark.Height), 0, 0, watermark.Width, watermark.Height, GraphicsUnit.Pixel, imageAttributes);

            ImageCodecInfo[] codecs = ImageCodecInfo.GetImageEncoders();
            ImageCodecInfo   ici    = null;

            foreach (ImageCodecInfo codec in codecs)
            {
                if (codec.MimeType.IndexOf("jpeg") > -1)
                {
                    ici = codec;
                }
            }
            EncoderParameters encoderParams = new EncoderParameters();

            long[] qualityParam = new long[1];
            if (quality < 0 || quality > 100)
            {
                quality = 80;
            }

            qualityParam[0] = quality;

            EncoderParameter encoderParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, qualityParam);

            encoderParams.Param[0] = encoderParam;

            if (ici != null)
            {
                img.Save(filename, ici, encoderParams);
            }
            else
            {
                img.Save(filename);
            }

            g.Dispose();
            img.Dispose();
            watermark.Dispose();
            imageAttributes.Dispose();
        }
Exemplo n.º 2
0
        /// <summary>
        /// 文字水印
        /// </summary>
        /// <param name="imgPath">服务器图片相对路径</param>
        /// <param name="filename">保存文件名</param>
        /// <param name="watermarkText">水印文字</param>
        /// <param name="watermarkStatus">图片水印位置 0=不使用 1=左上 2=中上 3=右上 4=左中  9=右下</param>
        /// <param name="quality">附加水印图片质量,0-100</param>
        /// <param name="fontname">字体</param>
        /// <param name="fontsize">字体大小</param>
        public static void AddImageSignText(string imgPath, string filename, string watermarkText, int watermarkStatus, int quality, string fontname, int fontsize)
        {
            byte[] _ImageBytes = File.ReadAllBytes(IOHelper.GetMapPath(imgPath));
            Image  img         = Image.FromStream(new System.IO.MemoryStream(_ImageBytes));

            filename = IOHelper.GetMapPath(filename);

            Graphics g        = Graphics.FromImage(img);
            Font     drawFont = new Font(fontname, fontsize, FontStyle.Regular, GraphicsUnit.Pixel);
            SizeF    crSize;

            crSize = g.MeasureString(watermarkText, drawFont);

            float xpos = 0;
            float ypos = 0;

            switch (watermarkStatus)
            {
            case 1:
                xpos = (float)img.Width * (float).01;
                ypos = (float)img.Height * (float).01;
                break;

            case 2:
                xpos = ((float)img.Width * (float).50) - (crSize.Width / 2);
                ypos = (float)img.Height * (float).01;
                break;

            case 3:
                xpos = ((float)img.Width * (float).99) - crSize.Width;
                ypos = (float)img.Height * (float).01;
                break;

            case 4:
                xpos = (float)img.Width * (float).01;
                ypos = ((float)img.Height * (float).50) - (crSize.Height / 2);
                break;

            case 5:
                xpos = ((float)img.Width * (float).50) - (crSize.Width / 2);
                ypos = ((float)img.Height * (float).50) - (crSize.Height / 2);
                break;

            case 6:
                xpos = ((float)img.Width * (float).99) - crSize.Width;
                ypos = ((float)img.Height * (float).50) - (crSize.Height / 2);
                break;

            case 7:
                xpos = (float)img.Width * (float).01;
                ypos = ((float)img.Height * (float).99) - crSize.Height;
                break;

            case 8:
                xpos = ((float)img.Width * (float).50) - (crSize.Width / 2);
                ypos = ((float)img.Height * (float).99) - crSize.Height;
                break;

            case 9:
                xpos = ((float)img.Width * (float).99) - crSize.Width;
                ypos = ((float)img.Height * (float).99) - crSize.Height;
                break;
            }

            g.DrawString(watermarkText, drawFont, new SolidBrush(Color.White), xpos + 1, ypos + 1);
            g.DrawString(watermarkText, drawFont, new SolidBrush(Color.Black), xpos, ypos);

            ImageCodecInfo[] codecs = ImageCodecInfo.GetImageEncoders();
            ImageCodecInfo   ici    = null;

            foreach (ImageCodecInfo codec in codecs)
            {
                if (codec.MimeType.IndexOf("jpeg") > -1)
                {
                    ici = codec;
                }
            }
            EncoderParameters encoderParams = new EncoderParameters();

            long[] qualityParam = new long[1];
            if (quality < 0 || quality > 100)
            {
                quality = 80;
            }

            qualityParam[0] = quality;

            EncoderParameter encoderParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, qualityParam);

            encoderParams.Param[0] = encoderParam;

            if (ici != null)
            {
                img.Save(filename, ici, encoderParams);
            }
            else
            {
                img.Save(filename);
            }

            g.Dispose();
            img.Dispose();
        }