Linux Standard Base Desktop Specification 4.1 | ||
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This interface shall enable some MNG extensions for a PNG image wrapped in a MNG datastream.
The parameter png_ptr shall specify the PNG image.
The parameter mng_features_permitted shall specify
the logical OR of the features to be enabled, possibly including
PNG_ALL_MNG_FEATURES
,
PNG_FLAG_MNG_EMPTY_PLTE
, and
PNG_FLAG_MNG_FILTER_64
.
This interface shall return the logical AND of the parameter mng_features_permitted with the set of MNG features supported by the local version of libpng.
This interface may not read or write a standalone PNG file; the PNG datastream must be embedded in a MNG datastream with an 8-byte MNG signature and MEND and MHDR chunks.
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png_malloc | Up | png_process_data |