Adding watermark to images inside a document Leave feedback

The most of the document formats allow you to place images inside a document. If you want to add watermark to images inside a document then it can be possible using GroupDocs.Watermark. Following are the steps to add watermark to the images of any document.

Load the document
Create and initialize watermark object
Set watermark properties
Find images in the document
Add watermark to all found images
Save the document

AdvancedUsage.AddingWatermarks.AddWatermarksToImages.AddWatermarkToImagesInsideDocument

// Specify an absolute or relative path to your document. Ex: @"C:\Docs\document.pdf"
using (Watermarker watermarker = new Watermarker("document.pdf"))
{
    // Initialize text watermark
    TextWatermark textWatermark = new TextWatermark("Protected image", new Font("Arial", 8));
    textWatermark.HorizontalAlignment = HorizontalAlignment.Center;
    textWatermark.VerticalAlignment = VerticalAlignment.Center;
    textWatermark.RotateAngle = 45;
    textWatermark.SizingType = SizingType.ScaleToParentDimensions;
    textWatermark.ScaleFactor = 1;

    // Initialize image watermark
    using (ImageWatermark imageWatermark = new ImageWatermark("protect.jpg"))
    {
        imageWatermark.HorizontalAlignment = HorizontalAlignment.Center;
        imageWatermark.VerticalAlignment = VerticalAlignment.Center;
        imageWatermark.RotateAngle = -45;
        imageWatermark.SizingType = SizingType.ScaleToParentDimensions;
        imageWatermark.ScaleFactor = 1;

        // Find all images in a document
        WatermarkableImageCollection images = watermarker.GetImages();
        for (int i = 0; i < images.Count; i++)
        {
            if (images[i].Width > 100 && images[i].Height > 100)
            {
                if (i % 2 == 0)
                {
                    images[i].Add(textWatermark);
                }
                else
                {
                    images[i].Add(imageWatermark);
                }
            }
        }
    }

    watermarker.Save("document.pdf");
}

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Adding watermark to images inside a document Leave feedback

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