Saving signed images with various output types Leave feedback
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Signature class supports saving of Image signed documents with various image format types and extended options.
Following classes are inherited from base class SaveOptions and allows to specify additional output image format settings.
- BmpSaveOptions class allows to save signed image document to BMP image format and setup additional options ( like compression, resolutions, bits per pixel etc);
- GifSaveOptions class allows to save signed image document to GIFimage format and setup additional options ( like compression, resolutions etc);
- JpegSaveOptions class allows to save signed image document to JPEG image format and setup additional options ( like compression, resolutions, quality etc);
- PngSaveOptions class allows to save signed image document to PNG image format and setup additional options ( like bit depth, color type, compression, filters etc);
- TiffSaveOptions class allows to save signed image document to TIFF image format and setup additional options
Here are the steps to save signed Image document to special image output type with additional settings with GroupDocs.Signature:
Create new instance of Signature class and pass source document path or stream as a constructor parameter.
Instantiate required signature options.
Instantiate the one of required class of image format save options BmpSaveOptions, GifSaveOptions, JpegSaveOptions, PngSaveOptions, TiffSaveOptions object according to your requirements and specify its properties.
Call Sign method of Signature class instance and pass signatureoptions and SaveOptions object to it.
using (Signature signature = new Signature("sample.jpg"))
{
QrCodeSignOptions signOptions = new QrCodeSignOptions("JohnSmith")
{
EncodeType = QRCodeTypes.QR, Left = 100, Top = 100
};
SaveOptions saveOptions;
// create Bmp save options with advanced settings
saveOptions = new BmpSaveOptions()
{
AddMissingExtenstion = true,
Compression = BitmapCompression.Rgb,
HorizontalResolution = 7,
VerticalResolution = 7,
BitsPerPixel = 16,
OverwriteExistingFiles = true
};
// sign document to file
signature.Sign("signedSample", signOptions, saveOptions);
}
using (Signature signature = new Signature("sample.jpg"))
{
QrCodeSignOptions signOptions = new QrCodeSignOptions("JohnSmith")
{
EncodeType = QRCodeTypes.QR, Left = 100, Top = 100
};
SaveOptions saveOptions;
// create Gif save options with advanced settings
saveOptions = new GifSaveOptions()
{
AddMissingExtenstion = true,
BackgroundColorIndex = 2,
ColorResolution = 7,
DoPaletteCorrection = true,
HasTrailer = true,
Interlaced = false,
IsPaletteSorted = true,
PixelAspectRatio = 24
};
// sign document to file
signature.Sign("SignedSample", signOptions, saveOptions);
}
using (Signature signature = new Signature("sample.jpg"))
{
QrCodeSignOptions signOptions = new QrCodeSignOptions("JohnSmith")
{
EncodeType = QRCodeTypes.QR, Left = 100, Top = 100
};
SaveOptions saveOptions;
// create Jpeg save options with advanced settings
saveOptions = new JpegSaveOptions()
{
AddMissingExtenstion = true,
BitsPerChannel = 8,
ColorType = JpegCompressionColorMode.Rgb,
Comment = "signed jpeg file",
CompressionType = JpegCompressionMode.Lossless,
Quality = 100,
SampleRoundingMode = JpegRoundingMode.Extrapolate
};
// sign document to file
signature.Sign("SignedSample", signOptions, saveOptions);
}
using (Signature signature = new Signature("sample.jpg"))
{
QrCodeSignOptions signOptions = new QrCodeSignOptions("JohnSmith")
{
EncodeType = QRCodeTypes.QR, Left = 100, Top = 100
};
SaveOptions saveOptions;
// create png save options with advanced settings
saveOptions = new PngSaveOptions()
{
AddMissingExtenstion = true,
BitDepth = 8,
ColorType = PngColorType.Grayscale,
CompressionLevel = 9,
FilterType = PngFilterType.Adaptive,
Progressive = true
};
// sign document to file
signature.Sign("SignedSample", signOptions, saveOptions);
}
using (Signature signature = new Signature("sample.jpg"))
{
QrCodeSignOptions signOptions = new QrCodeSignOptions("JohnSmith")
{
EncodeType = QRCodeTypes.QR, Left = 100, Top = 100
};
SaveOptions saveOptions;
// create tiff save options with advanced settings
saveOptions = new TiffSaveOptions()
{
AddMissingExtenstion = true,
ExpectedTiffFormat = TiffFormat.TiffNoCompressionBw
};
// sign document to file
signature.Sign("SignedSample", signOptions, saveOptions);
}
You may easily run the code above and see the feature in action in our GitHub examples:
- GroupDocs.Signature for .NET examples, plugins, and showcase
- GroupDocs.Signature for Java examples, plugins, and showcase
- Document Signature for .NET MVC UI Example
- Document Signature for .NET App WebForms UI Example
- Document Signature for Java App Dropwizard UI Example
- Document Signature for Java Spring UI Example
Along with the full-featured .NET library, we provide simple but powerful free online apps.
To generate image signatures and/or sign your files with them for free, you can use the Generate Image online app.
To sign PDF, Word, Excel, PowerPoint, and other documents you can use the other online apps from the GroupDocs.Signature App Product Family.
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