2.3.6.5 CHECKPNGFORMAT Record
The CHECKPNGFORMAT Record queries the driver to see if it can handle the given PNG image and parses the PNG image to determine whether the driver can support it.
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RecordSize |
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RecordFunction |
EscapeFunction |
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ByteCount |
PNGBuffer (variable) |
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RecordSize (4 bytes): A 32-bit unsigned integer that defines the number of WORD structures, defined in [MS-DTYP] section 2.2.61, in the record.
RecordFunction (2 bytes): A 16-bit unsigned integer that defines this record type. The lower byte MUST match the lower byte of the RecordType Enumeration (section 2.1.1.1) table value META_ESCAPE.
EscapeFunction (2 bytes): A 16-bit unsigned integer that defines the escape function. The value MUST be 0x1018 (CHECKPNGFORMAT) from the MetafileEscapes Enumeration (section 2.1.1.17).
ByteCount (2 bytes): A 16-bit unsigned integer that specifies the size, in bytes, of the PNGBuffer field.
PNGBuffer (variable): A buffer of PNG image data.
See section 2.3.6 for the specification of other Escape Record Types.