Reading PNG metadata properties The GroupDocs.Metadata API supports extracting format-specific information from PNG images.
The following are the steps to read the native PNG metadata.
Load a PNG image Get the root metadata package Extract the native metadata package using PngRootPackage.getPngPackage Read the PNG metadata properties advanced_usage.managing_metadata_for_specific_formats.image.png.PngReadTextChunks
try (Metadata metadata = new Metadata(Constants.InputPng)) { PngRootPackage root = metadata.getRootPackageGeneric(); for (PngTextChunk chunk : root.getPngPackage().getTextChunks()) { System.out.println(chunk.getKeyword()); System.out.println(chunk.getText()); if (chunk instanceof PngCompressedTextChunk) { PngCompressedTextChunk compressedChunk = (PngCompressedTextChunk) chunk; System....Viewer Product Solution GroupDocs.Annotation Product Solution GroupDocs...
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GroupDocs.Watermar API supports adding the following image file types as image watermark:
Bmp; Png; Gif; Jpeg. Add image watermark from local file Following code snippet shows how to add ImageWatermark to a document. If the document consists of multiple parts (pages, worksheets, slides, frames etc), the watermark will be added to all of them.
advanced_usage.adding_image_watermarks.AddImageWatermark
// Specify an absolute or relative path to your document. Ex: "C:\\Docs\\presentation.pptx" Watermarker watermarker = new Watermarker("presentation....Viewer Product Solution GroupDocs.Annotation Product Solution GroupDocs...
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In some cases it’s required to specify the document format manually to guarantee correct output produced by GroupDocs.Parser. The following are the cases when the document format must be specified manually:
Markdown documents MHTML documents OTP documents (OpenDocument Presentation Template) Databases Emails from remote servers Here are the steps to specify the document format for Markup document.
Instantiate the LoadOptions object and pass the document format in LoadOptions(FileFormat) constructor; Create Parser object and call any method....Viewer Product Solution GroupDocs.Annotation Product Solution GroupDocs...