Linux Standard Base Desktop Specification 4.1 | ||
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This interface shall install a custom callback function to handle unknown chunks in the input stream.
The parameter png_ptr shall specify the PNG file.
The parameter user_chunk_ptr shall specify a user pointer obtainable with png_get_user_chunk_ptr().
The parameter read_user_chunk_fn shall specify the custom callback function.
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png_set_read_fn | Up | png_set_read_user_transform_fn |