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This object provides functionality for tuning the parameters of saving an image to JPEG format (IFF_JpegGrayJfif, IFF_JpegColorJfif, IFF_Jpeg2kGray, IFF_Jpeg2kColor, IFF_TiffGrayJpegJfif and IFF_TiffColorJpegJfif image format types) using the IImage::WriteToFile method. A pointer to this object is passed into the IImage::WriteToFile method as an input parameter, and thus affects the size and quality of the resulting image. All properties of a newly created object of this type are set to reasonable defaults. See the description of particular property for its default value. The JpegExtendedParams object is a persistent object. This means that the object’s current state can be written to persistent storage. Later, the object can be re-created by reading the object’s state from the persistent storage. The following methods provide persistence of the object: Linux: SaveToFile, and LoadFromFile Windows SaveToFile, LoadFromFile, SaveToMemory, and LoadFromMemory.

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Properties

NameTypeDescription
ApplicationEngine, read-onlyReturns the Engine object.
QualityintStores the value of the JPEG quality in percent. The default value for this property is 50.

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Methods

NameDescription
CopyFromInitializes properties of the current object with values of similar properties of another object.
LoadFromFileRestores the object contents from a file on disk.
LoadFromMemory <Note> : Windows only. </Note>Restores the object contents from the global memory.
SaveToFileSaves the object contents into a file on disk.
SaveToMemory <Note> : Windows only. </Note>Saves the object contents into the global memory.

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Output parameter

This object is the output parameter of the CreateJpegExtendedParams method of the Engine object.

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Input parameter

This object is passed as an input parameter to the following methods:

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See also

ImageFileFormatEnum Working with Images Working with Properties