Watermark text on .gif images in c#

Question

Hi i am creating watermark on .GIF images but code is working only of .JPG images. I am using the following code

System.Drawing.Image objImage = System.Drawing.Image.FromFile(imageURL);//From File
                    int height = objImage.Height;//Actual image width
                    int width = objImage.Width;//Actual image height
                    System.Drawing.Bitmap bitmapimage = new System.Drawing.Bitmap(objImage, width, height);// create bitmap with same size of Actual image
                    System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmapimage);                   
                    SolidBrush brush = new SolidBrush(Color.FromArgb(100, 255, 255, 255));
                    //Adding watermark text on image
                    string hex = "#ADADAD";
                    Color _color = System.Drawing.ColorTranslator.FromHtml(hex);
                    g.DrawString("www.Statckoverflow.com", new Font("Trebuchet MS", 10, System.Drawing.FontStyle.Bold), new SolidBrush(_color), 5, 5);
                    g.DrawString("Copyright © Gitz", new Font("Trebuchet MS", 10, System.Drawing.FontStyle.Bold), new SolidBrush(_color), 5, 20);

                    Response.ContentType = "Image/gif";
                    bitmapimage.Save(Response.OutputStream, ImageFormat.Gif);

This code is woking only for .JPG files. For .GIF images its not working.Images are creating but the animation of the .GIF images are strop after creating watermark. Please correct me if I am doing something wrong on this code ?????

you can follow this answer: https://stackoverflow.com/a/45652272/3768871 — OmG, Aug 12 '17 at 16:12

score 0 · Answer 1 · 2015-10-27T10:55:08.483

I think you should separate gif to frames and write watermark and again create animation on it. For separating use this code:

        System.Drawing.Image objImage = System.Drawing.Image.FromFile("1.gif");//From File
        int height = objImage.Height;//Actual image width
        int width = objImage.Width;//Actual image height
        FrameDimension dimension = new FrameDimension(objImage.FrameDimensionsList[0]);
        // Number of frames
        int frameCount = objImage.GetFrameCount(dimension);
        Bitmap[] Frames = new Bitmap[frameCount];

        // Copy the animation Bitmap frames into the Bitmap array

        for (int Index = 0; Index < frameCount; Index++)
        {
            // Set the current frame within the animation to be copied into the Bitmap array element

            objImage.SelectActiveFrame(FrameDimension.Time, Index);

            // Create a new Bitmap element within the Bitmap array in which to copy the next frame

            Frames[Index] = new Bitmap(objImage.Size.Width, objImage.Size.Height);

            // Copy the current animation frame into the new Bitmap array element

            Graphics.FromImage(Frames[Index]).DrawImage(objImage, new Point(0, 0));
            SolidBrush brush = new SolidBrush(Color.FromArgb(100, 255, 255, 255));
            System.Drawing.Bitmap bitmapimage = new System.Drawing.Bitmap(objImage, width, height);// create bitmap with same size of Actual image
            System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmapimage);
            //Adding watermark text on image
            string hex = "#ADADAD";
            Color _color = System.Drawing.ColorTranslator.FromHtml(hex);
            g.DrawString("www.Statckoverflow.com", new Font("Trebuchet MS", 10, System.Drawing.FontStyle.Bold), new SolidBrush(_color), 5, 5);
            g.DrawString("Copyright © Gitz", new Font("Trebuchet MS", 10, System.Drawing.FontStyle.Bold), new SolidBrush(_color), 5, 20);

        }

but still getting the same problem after using your code .I am adding the code `Response.ContentType = "Image/gif"; bitmapimage.Save(Response.OutputStream, ImageFormat.Gif);` in last . — Gitz, Oct 27 '15 at 12:07
how do I save the `frameCount` you didn't add that part into the above code. — Gitz, Oct 27 '15 at 12:09

Watermark text on .gif images in c#

1 Answers1