2.2.2.2.1.2.1.1 Secondary Drawing Order Header (SECONDARY_DRAWING_ORDER_HEADER)
The SECONDARY_DRAWING_ORDER_HEADER structure is included in all secondary drawing orders.
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controlFlags |
orderLength |
extraFlags |
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orderType |
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controlFlags (1 byte): An 8-bit, unsigned integer. The control byte that identifies the class of the drawing order. This field MUST contain the TS_STANDARD (0x01) and TS_SECONDARY (0x02) flags to indicate that the order is a secondary drawing order (see section 2.2.2.1.1).
orderLength (2 bytes): A 16-bit, signed integer. The encoded length in bytes of the secondary drawing order, including the size of the header. When constructing the order, the value in the orderLength field MUST be 13 bytes less than the actual order length. Hence, when decoding the order, the orderLength field MUST be adjusted by adding 13 bytes. These adjustments are for historical reasons.
extraFlags (2 bytes): A 16-bit, unsigned integer. Flags specific to each secondary drawing order.
orderType (1 byte): An 8-bit, unsigned integer. Identifies the type of secondary drawing order. MUST be one of the following values.
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Value
Meaning
TS_CACHE_BITMAP_UNCOMPRESSED
0x00
Cache Bitmap - Revision 1 (section 2.2.2.2.1.2.2) Secondary Drawing Order with an uncompressed bitmap.
TS_CACHE_COLOR_TABLE
0x01
Cache Color Table (section 2.2.2.2.1.2.4) Secondary Drawing Order.
TS_CACHE_BITMAP_COMPRESSED
0x02
Cache Bitmap - Revision 1 (section 2.2.2.2.1.2.2) Secondary Drawing Order with a compressed bitmap.
TS_CACHE_GLYPH
0x03
Cache Glyph - Revision 1 (section 2.2.2.2.1.2.5) or Cache Glyph - Revision 2 (section 2.2.2.2.1.2.6) Secondary Drawing Order. The version is indicated by the extraFlags field.
TS_CACHE_BITMAP_UNCOMPRESSED_REV2
0x04
Cache Bitmap - Revision 2 (section 2.2.2.2.1.2.3) Secondary Drawing Order with an uncompressed bitmap.
TS_CACHE_BITMAP_COMPRESSED_REV2
0x05
Cache Bitmap - Revision 2 (section 2.2.2.2.1.2.3) Secondary Drawing Order with a compressed bitmap.
TS_CACHE_BRUSH
0x07
Cache Brush (section 2.2.2.2.1.2.7) Secondary Drawing Order.
TS_CACHE_BITMAP_COMPRESSED_REV3
0x08
Cache Bitmap - Revision 3 (section 2.2.2.2.1.2.8) Secondary Drawing Order with a compressed bitmap.