2.3.2.3 META_PLACEABLE Record
The META_PLACEABLE Record is the first record in a placeable WMF metafile, which is an extension to the WMF metafile format.<55> The information in this extension allows the specification of the placement and size of the target image, which makes it adaptable to different output devices.
The META_PLACEABLE MUST be the first record of the metafile, located immediately before the META_HEADER Record (section 2.3.2.2).
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Key |
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HWmf |
BoundingBox |
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Inch |
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Reserved |
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Checksum |
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Key (4 bytes): Identification value that indicates the presence of a placeable metafile header. This value MUST be 0x9AC6CDD7.
HWmf (2 bytes): The resource handle to the metafile, when the metafile is in memory. When the metafile is on disk, this field MUST contain 0x0000. This attribute of the metafile is specified in the Type field of the META_HEADER Record.
BoundingBox (8 bytes): The rectangle in the playback context (or simply the destination rectangle), measured in logical units, for displaying the metafile. The size of a logical unit is specified by the Inch field. See section 2.2.2.18 for details about the structure of the BoundingBox field.
Inch (2 bytes): The number of logical units per inch used to represent the image. This value can be used to scale an image.
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By convention, an image is considered to be recorded at 1440 logical units (twips) per inch. Thus, a value of 720 specifies that the image SHOULD be rendered at twice its normal size, and a value of 2880 specifies that the image SHOULD be rendered at half its normal size.
Reserved (4 bytes): A field that is not used and MUST be set to 0x00000000.
Checksum (2 bytes): A checksum for the previous 10 16-bit values in the header. This value can be used to determine whether the metafile has become corrupted. The value is calculated by initializing the checksum to zero and then XORing it one at a time with the 10 16-bit values in the header.
See section 2.3.2 for the specification of similar records.