2.2.2.2.1.3.1.1 Alternate Secondary Drawing Order Header (ALTSEC_DRAWING_ORDER_HEADER)

The ALTSEC_DRAWING_ORDER_HEADER structure is included in all alternate secondary drawing orders.

0	1	2	3	4	5	6	7	8	9	1 0	1	2	3	4	5	6	7	8	9	2 0	1	2	3	4	5	6	7	8	9	3 0	1
controlFlags

controlFlags (1 byte): An 8-bit, unsigned integer. The control byte that identifies the class and type of the drawing order.

The format of the controlFlags byte is described by the following bitmask diagram.

0	1	2	3	4	5	6	7	8	9	1 0	1	2	3	4	5	6	7	8	9	2 0	1	2	3	4	5	6	7	8	9	3 0	1
class		orderType

class (2 bits): A 2-bit, unsigned integer. This field MUST contain only the TS_SECONDARY (0x02) flag to indicate that the order is an alternate secondary drawing order (see section 2.2.2.2.1).

orderType (6 bits): A 6-bit, unsigned integer. Identifies the type of alternate secondary drawing order.

Value	Meaning
TS_ALTSEC_SWITCH_SURFACE 0x00	Switch Surface Alternate Secondary Drawing Order (see section 2.2.2.2.1.3.3).
TS_ALTSEC_CREATE_OFFSCR_BITMAP 0x01	Create Offscreen Bitmap Alternate Secondary Drawing Order (see section 2.2.2.2.1.3.2).
TS_ALTSEC_STREAM_BITMAP_FIRST 0x02	Stream Bitmap First (Revision 1 and 2) Alternate Secondary Drawing Order (see section 2.2.2.2.1.3.5.1).
TS_ALTSEC_STREAM_BITMAP_NEXT 0x03	Stream Bitmap Next Alternate Secondary Drawing Order (see section 2.2.2.2.1.3.5.2).
TS_ALTSEC_CREATE_NINEGRID_BITMAP 0x04	Create NineGrid Bitmap Alternate Secondary Drawing Order (see section 2.2.2.2.1.3.4).
TS_ALTSEC_GDIP_FIRST 0x05	Draw GDI+ First Alternate Secondary Drawing Order (see section 2.2.2.2.1.3.6.2).
TS_ALTSEC_GDIP_NEXT 0x06	Draw GDI+ Next Alternate Secondary Drawing Order (see section 2.2.2.2.1.3.6.3).
TS_ALTSEC_GDIP_END 0x07	Draw GDI+ End Alternate Secondary Drawing Order (see section 2.2.2.2.1.3.6.4).
TS_ALTSEC_GDIP_CACHE_FIRST 0x08	Draw GDI+ First Alternate Secondary Drawing Order (see section 2.2.2.2.1.3.6.2).
TS_ALTSEC_GDIP_CACHE_NEXT 0x09	Draw GDI+ Cache Next Alternate Secondary Drawing Order (see section 2.2.2.2.1.3.6.3).
TS_ALTSEC_GDIP_CACHE_END 0x0A	Draw GDI+ Cache End Alternate Secondary Drawing Order (see section 2.2.2.2.1.3.6.4).
TS_ALTSEC_WINDOW 0x0B	Windowing Alternate Secondary Drawing Order (see [MS-RDPERP] section 2.2.1.3).
TS_ALTSEC_COMPDESK_FIRST 0x0C	Desktop Composition Alternate Secondary Drawing Order (see [MS-RDPEDC] section 2.2.1.1).
TS_ALTSEC_FRAME_MARKER 0x0D	Frame Marker Alternate Secondary Drawing Order (see section 2.2.2.2.1.3.7).