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void init( float aspect_ratio)
Java: void Init( float aspect_ratio)
[Declared in "../apps/compressed_io/jp2.h"]
Initializes the contents of the internal object, setting the aspect ratio (vertical grid spacing divided by horizontal grid spacing) for display and capture resolutions to the indicated value.
It is illegal to call this function unless there is an internal object ( exists must return true) and that object has not yet been initialized.